Merge branch 'develop' into 'master'

v0.3.0

See merge request slumber/multi-user!106

.gitlab-ci.yml

@@ -2,9 +2,12 @@ stages:
   - test
   - build
   - deploy
+  - doc
+
 
 
 include:
   - local: .gitlab/ci/test.gitlab-ci.yml
   - local: .gitlab/ci/build.gitlab-ci.yml
   - local: .gitlab/ci/deploy.gitlab-ci.yml
+  - local: .gitlab/ci/doc.gitlab-ci.yml

.gitlab/ci/build.gitlab-ci.yml

@@ -1,5 +1,6 @@
 build:
   stage: build
+  needs: ["test"]
   image: debian:stable-slim
   script:
     - rm -rf tests .git .gitignore script
@@ -7,7 +8,3 @@ build:
     name: multi_user
     paths: 
      - multi_user
-  only:
-    refs:
-        - master
-        - develop

.gitlab/ci/deploy.gitlab-ci.yml

@@ -1,5 +1,6 @@
 deploy:
   stage: deploy
+  needs: ["build"]
   image: slumber/docker-python  
   variables:
     DOCKER_DRIVER: overlay2
@@ -15,10 +16,5 @@ deploy:
     - docker build --build-arg replication_version=${RP_VERSION}  --build-arg version={VERSION} -t registry.gitlab.com/slumber/multi-user/multi-user-server:${VERSION} ./scripts/docker_server
     - echo "Pushing to gitlab registry ${VERSION}"
     - docker login -u $CI_REGISTRY_USER -p $CI_REGISTRY_PASSWORD $CI_REGISTRY
-    - docker tag registry.gitlab.com/slumber/multi-user/multi-user-server:${VERSION} registry.gitlab.com/slumber/multi-user/multi-user-server:latest
+    - docker tag registry.gitlab.com/slumber/multi-user/multi-user-server:${VERSION} registry.gitlab.com/slumber/multi-user/multi-user-server:${CI_COMMIT_REF_NAME}
     - docker push registry.gitlab.com/slumber/multi-user/multi-user-server
-
-  only:
-    refs:
-        - master
-        - develop

.gitlab/ci/doc.gitlab-ci.yml

@@ -0,0 +1,16 @@
+pages:
+  stage: doc
+  needs: ["deploy"]
+  image: python
+  script:
+  - pip install -U sphinx sphinx_rtd_theme sphinx-material
+  - sphinx-build -b html ./docs public
+  artifacts:
+    paths:
+    - public
+  only:
+    refs:
+    - master
+    - develop
+
+

CHANGELOG.md

@@ -158,3 +158,32 @@ All notable changes to this project will be documented in this file.
 - Material renaming
 - Default material nodes input parameters
 - blender 2.91 python api compatibility
+
+## [0.3.0] - 2021-04-14
+
+### Added
+
+- Curve material support
+- Cycle visibility settings
+- Session save/load  operator 
+- Add new scene support
+- Physic initial support
+- Geometry node initial support
+- Blender 2.93 compatibility
+### Changed
+
+- Host documentation on Gitlab Page
+- Event driven update (from the blender deps graph)
+
+### Fixed
+
+- Vertex group assignation
+- Parent relation can't be removed
+- Separate object
+- Delete animation
+- Sync missing holdout option for grease pencil material
+- Sync missing `skin_vertices`  
+- Exception access violation during Undo/Redo
+- Sync missing armature bone Roll
+- Sync missing driver data_path
+- Constraint replication

README.md

@@ -19,31 +19,32 @@ This tool aims to allow multiple users to work on the same scene over the networ
 
 ## Usage
 
-See the [documentation](https://multi-user.readthedocs.io/en/latest/) for details.
+See the [documentation](https://slumber.gitlab.io/multi-user/index.html) for details.
 
 ## Troubleshooting
 
-See the [troubleshooting guide](https://multi-user.readthedocs.io/en/latest/getting_started/troubleshooting.html) for tips on the most common issues.
+See the [troubleshooting guide](https://slumber.gitlab.io/multi-user/getting_started/troubleshooting.html) for tips on the most common issues.
 
 ## Current development status
 
 Currently, not all data-block are supported for replication over the wire. The following list summarizes the status for each ones.
 
 | Name           | Status |                           Comment                            |
-| ----------- | :----: | :--------------------------------------------------------------------------: |
+| -------------- | :----: | :----------------------------------------------------------: |
 | action         |   ✔️    |                                                              |
 | armature       |   ❗    |                          Not stable                          |
 | camera         |   ✔️    |                                                              |
 | collection     |   ✔️    |                                                              |
-| curve       |   ❗    |                             Nurbs not supported                              |
+| curve          |   ❗    |                 Nurbs surfaces not supported                 |
-| gpencil     |   ✔️    | [Airbrush not supported](https://gitlab.com/slumber/multi-user/-/issues/123) |
+| gpencil        |   ✔️    |                                                              |
 | image          |   ✔️    |                                                              |
 | mesh           |   ✔️    |                                                              |
 | material       |   ✔️    |                                                              |
-| node_groups |   ❗    |                                Material only                                 |
+| node_groups    |   ❗    |                   Material & Geometry only                   |
+| geometry nodes |   ✔️    |                                                              |
 | metaball       |   ✔️    |                                                              |
 | object         |   ✔️    |                                                              |
-| textures    |   ❗    |                         Supported for modifiers only                         |
+| textures       |   ❗    |       Supported for modifiers/materials/geo nodes only       |
 | texts          |   ✔️    |                                                              |
 | scene          |   ✔️    |                                                              |
 | world          |   ✔️    |                                                              |
@@ -52,13 +53,14 @@ Currently, not all data-block are supported for replication over the wire. The f
 | texts          |   ❌    | [Planned](https://gitlab.com/slumber/multi-user/-/issues/81) |
 | nla            |   ❌    |                                                              |
 | volumes        |   ✔️    |                                                              |
-| particles   |   ❌    |        [On-going](https://gitlab.com/slumber/multi-user/-/issues/24)         |
+| particles      |   ❗    |                   The cache isn't syncing.                   |
 | speakers       |   ❗    | [Partial](https://gitlab.com/slumber/multi-user/-/issues/65) |
 | vse            |   ❗    |               Mask and Clip not supported yet                |
 | physics        |   ❌    | [Planned](https://gitlab.com/slumber/multi-user/-/issues/45) |
 | libraries      |   ❗    |                           Partial                            |
 
 
+
 ### Performance issues
 
 Since this addon is written in pure python for a research purpose, performances could be better from all perspective.
@@ -74,7 +76,7 @@ I'm working on it.
 
 ## Contributing
 
-See [contributing section](https://multi-user.readthedocs.io/en/latest/ways_to_contribute.html) of the documentation.
+See [contributing section](https://slumber.gitlab.io/multi-user/ways_to_contribute.html) of the documentation.
 
 Feel free to [join the discord server](https://discord.gg/aBPvGws) to chat, seek help and contribute.
 

docs/getting_started/quickstart.rst

@@ -292,7 +292,7 @@ a connected user or be under :ref:`common-right<**COMMON**>` rights.
 
 The Repository panel (see image below) allows you to monitor, change datablock states and rights manually.
 
-.. figure:: img/quickstart_properties.png
+.. figure:: img/quickstart_save_session_data.png
    :align: center
 
    Repository panel
@@ -319,6 +319,40 @@ Here is a quick list of available actions:
 | .. image:: img/quickstart_remove.png  |  **Delete**       | Remove the data-block from network replication                                     |
 +---------------------------------------+-------------------+------------------------------------------------------------------------------------+
 
+Save session data 
+-----------------
+
+.. danger::
+   This is an experimental feature, until the stable release it is highly recommended to use regular .blend save.
+
+The save session data allows you to create a backup of the session data.
+
+When you hit the **save session data** button, the following popup dialog will appear.
+It allows you to choose the destination folder and if you want to run an auto-save.
+
+.. figure:: img/quickstart_save_session_data_dialog.png
+   :align: center
+
+   Save session data dialog.
+
+If you enabled the auto-save option, you can cancel it from the **Cancel auto-save** button.
+
+.. figure:: img/quickstart_save_session_data_cancel.png
+   :align: center
+
+   Cancel session autosave.
+
+
+To import session data backups, use the following **Multiuser session snapshot** import dialog
+
+.. figure:: img/quickstart_import_session_data.png
+   :align: center
+
+   Import session data dialog.
+
+.. note::
+   It is not yet possible to start a session directly from a backup.
+
 .. _advanced:
 
 Advanced settings

docs/tutorials/hosting_guide.rst

@@ -258,33 +258,55 @@ You can check that your container is running, and find its ID and name with:
 .. _docker-logs:
 
 Viewing logs in a docker container
------------------------------------
+----------------------------------
 
-Logs for the server running in a docker container can be accessed by outputting the following to a log file:
+Logs for the server running in a docker container can be accessed by outputting the container logs to a log file. First, you'll need to know your container ID, which you can find by running:
-
-.. code-block:: bash
-
-    docker log your-container-id >& dockerserver.log
-
-.. Note:: If using WSL2 on Windows 10 (Windows Subsystem for Linux), it is preferable to run a dedicated server via regular command line approach (or the associated startup script) from within Windows - docker desktop for windows 10 usually uses the WSL2 backend where it is available.
-
-.. This may not be true. Need to write up how to locally start a docker container from WSL2
-
-First, you'll need to know your container ID, which you can find by running:
 
 .. code-block:: bash
 
     docker ps
 
-If you're cloud-hosting with e.g. Google Cloud, your container will be the one associated with the `registry address <https://gitlab.com/slumber/multi-user/container_registry/1174180>`_ where your Docker image was located. e.g. registry.gitlab.com/slumber/multi-user/multi-user-server:0.2.0
+Then, output the container logs to a file:
-
-You can either ssh in to your server and then run 
 
 .. code-block:: bash
 
-    cat your-log-name.log
+    docker logs your-container-id >& dockerserver.log
 
-or view the docker container logs with 
+.. Note:: If using WSL2 on Windows 10 (Windows Subsystem for Linux), it is preferable to run a dedicated server via regular command line approach (or the associated startup script) from within Windows - docker desktop for windows 10 usually uses the WSL2 backend where it is available.
+
+.. This may not be true. Need to write up how to locally start a docker container from WSL2
+
+
+Downloading logs from a docker container on a cloud-hosted server
+-----------------------------------------------------------------
+
+If you'd like to pull the log files from a cloud-hosted server to submit to a developer for review, a simple process using SSH and SCP is as follows:
+
+First SSH into your instance. You can either open the `VM Instances console <https://console.cloud.google.com/compute/instances>`_ and use the browser terminal provided by Google Cloud (I had the best luck using the Google Chrome browser)... or you can see `here <https://cloud.google.com/compute/docs/instances/connecting-advanced#thirdpartytools>`_ for how to set up your instance for SSH access from your local terminal.
+
+If using SSH from your terminal, first generate SSH keys (setting their access permissions to e.g. chmod 400 level whereby only the user has permissions) and submit the public key to the cloud-hosted VM instance, storing the private key on your local machine.
+Then, SSH into your cloud server from your local terminal, with the following command:
+
+.. code-block:: bash
+
+    ssh -i PATH_TO_PRIVATE_KEY USERNAME@EXTERNAL_IP_ADDRESS
+
+Use the private key which corresponds to the public key you uploaded, and the username associated with that key (visible in the Google Cloud console for your VM Instance). Use the external IP address for the server, available from the `VM Instances console <https://console.cloud.google.com/compute/instances>`_
+e.g.
+
+.. code-block:: bash
+
+    ssh -i ~/.ssh/id_rsa user@xxx.xxx.xxx.xxx
+
+Once you've connected to the server's secure shell, you can generate a log file from the docker container running the replication server. First, you'll need to know your container ID, which you can find by running:
+
+.. code-block:: bash
+
+    docker ps
+
+If you're cloud-hosting with e.g. Google Cloud, your container will be the one associated with the `registry address <https://gitlab.com/slumber/multi-user/container_registry/1174180>`_ where your Docker image was located. e.g. registry.gitlab.com/slumber/multi-user/multi-user-server:latest
+
+To view the docker container logs, run:
 
 .. code-block:: bash
 
@@ -296,7 +318,29 @@ OR
 
     docker logs your-container-id
 
-Note, see these `notes <https://cloud.google.com/compute/docs/containers/deploying-containers?_ga=2.113663175.-1396941296.1606125558#viewing_container_logs>`_ for how to check server logs on Google Cloud.
+To save the output to a file, run:
+
+.. code-block:: bash
+
+    docker logs your-container-id >& dockerserver.log
+
+Now that the server logs are available in a file, we can disconnect from the secure shell (SSH), and then copy the file to the local machine using SCP. In your local terminal, execute the following:
+
+.. code-block:: bash
+
+    scp -i PATH_TO_PRIVATE_KEY USERNAME@EXTERNAL_IP_ADDRESS:"dockerserver.log" LOCAL_PATH_TO_COPY_FILE_TO
+
+e.g.
+
+.. code-block:: bash
+
+    scp -i ~/.ssh/id_rsa user@xxx.xxx.xxx.xxx:"dockerserver.log" .
+
+This copies the file dockerserver.log generated in the previous step to the current directory on the local machine. From there, you can send it to the multi-user maintainers for review.
+
+
+.. Note:: See these `notes <https://cloud.google.com/compute/docs/containers/deploying-containers?_ga=2.113663175.-1396941296.1606125558#viewing_container_logs>`_ for how to check server logs on Google Cloud using other tools.
+
 
 .. _serverstartscripts:
 

multi_user/__init__.py

@@ -19,7 +19,7 @@
 bl_info = {
     "name": "Multi-User",
     "author": "Swann Martinez",
-    "version": (0, 2, 0),
+    "version": (0, 3, 0),
     "description": "Enable real-time collaborative workflow inside blender",
     "blender": (2, 82, 0),
     "location": "3D View > Sidebar > Multi-User tab",
@@ -44,7 +44,7 @@ from . import environment
 
 
 DEPENDENCIES = {
-    ("replication", '0.1.17'),
+    ("replication", '0.1.26'),
 }
 
 
@@ -89,6 +89,8 @@ def register():
         type=preferences.SessionUser
     )
     bpy.types.WindowManager.user_index = bpy.props.IntProperty()
+    bpy.types.TOPBAR_MT_file_import.append(operators.menu_func_import)
+
 
 def unregister():
     from . import presence
@@ -97,6 +99,8 @@ def unregister():
     from . import preferences
     from . import addon_updater_ops
 
+    bpy.types.TOPBAR_MT_file_import.remove(operators.menu_func_import)
+
     presence.unregister()
     addon_updater_ops.unregister()
     ui.unregister()

multi_user/bl_types/__init__.py

@@ -39,9 +39,10 @@ __all__ = [
     'bl_font',
     'bl_sound',
     'bl_file',
-    'bl_sequencer',
+    # 'bl_sequencer',
     'bl_node_group',
     'bl_texture',
+    "bl_particle",
 ]  # Order here defines execution order
 
 if bpy.app.version[1] >= 91:

multi_user/bl_types/bl_action.py

@@ -132,9 +132,6 @@ def load_fcurve(fcurve_data, fcurve):
 class BlAction(BlDatablock):
     bl_id = "actions"
     bl_class = bpy.types.Action
-    bl_delay_refresh = 1
-    bl_delay_apply = 1
-    bl_automatic_push = True
     bl_check_common = False
     bl_icon = 'ACTION_TWEAK'
     bl_reload_parent = False

multi_user/bl_types/bl_armature.py

@@ -25,12 +25,19 @@ from .. import presence, operators, utils
 from .bl_datablock import BlDatablock
 
 
+def get_roll(bone: bpy.types.Bone) -> float:
+    """ Compute the actuall roll of a pose bone
+
+        :arg pose_bone: target pose bone
+        :type pose_bone: bpy.types.PoseBone
+        :return: float
+    """
+    return bone.AxisRollFromMatrix(bone.matrix_local.to_3x3())[1]
+
+
 class BlArmature(BlDatablock):
     bl_id = "armatures"
     bl_class = bpy.types.Armature
-    bl_delay_refresh = 1
-    bl_delay_apply = 0
-    bl_automatic_push = True
     bl_check_common = False
     bl_icon = 'ARMATURE_DATA'
     bl_reload_parent = False
@@ -94,7 +101,7 @@ class BlArmature(BlDatablock):
             new_bone.head = bone_data['head_local']
             new_bone.tail_radius = bone_data['tail_radius']
             new_bone.head_radius = bone_data['head_radius']
-            # new_bone.roll =  bone_data['roll']
+            new_bone.roll =  bone_data['roll']
             
             if 'parent' in bone_data:
                 new_bone.parent = target.edit_bones[data['bones']
@@ -127,8 +134,6 @@ class BlArmature(BlDatablock):
             'parent',
             'name',
             'layers',
-            # 'roll',
-
         ]
         data = dumper.dump(instance)
 
@@ -136,6 +141,7 @@ class BlArmature(BlDatablock):
             if bone.parent:
                 data['bones'][bone.name]['parent'] = bone.parent.name
         # get the parent Object
+        # TODO: Use id_data instead
         object_users = utils.get_datablock_users(instance)[0]
         data['user'] = object_users.uuid
         data['user_name'] = object_users.name
@@ -146,6 +152,8 @@ class BlArmature(BlDatablock):
             item.name for item in container_users if isinstance(item, bpy.types.Collection)]
         data['user_scene'] = [
             item.name for item in container_users if isinstance(item, bpy.types.Scene)]
+
+        for bone in instance.bones:
+            data['bones'][bone.name]['roll'] = get_roll(bone)
+
         return data
-
-

multi_user/bl_types/bl_camera.py

@@ -26,9 +26,6 @@ from .bl_datablock import BlDatablock
 class BlCamera(BlDatablock):
     bl_id = "cameras"
     bl_class = bpy.types.Camera
-    bl_delay_refresh = 1
-    bl_delay_apply = 1
-    bl_automatic_push = True
     bl_check_common = False
     bl_icon = 'CAMERA_DATA'
     bl_reload_parent = False

multi_user/bl_types/bl_collection.py

@@ -85,9 +85,6 @@ class BlCollection(BlDatablock):
     bl_id = "collections"
     bl_icon = 'FILE_FOLDER'
     bl_class = bpy.types.Collection
-    bl_delay_refresh = 1
-    bl_delay_apply = 1
-    bl_automatic_push = True
     bl_check_common = True
     bl_reload_parent = False
     
@@ -114,6 +111,10 @@ class BlCollection(BlDatablock):
         # Link childrens
         load_collection_childrens(data['children'], target)
 
+        # FIXME: Find a better way after the replication big refacotoring
+        # Keep other user from deleting collection object by flushing their history
+        utils.flush_history()
+
     def _dump_implementation(self, data, instance=None):
         assert(instance)
 

multi_user/bl_types/bl_curve.py

@@ -26,7 +26,8 @@ from .bl_datablock import BlDatablock
 from .dump_anything import (Dumper, Loader,
                             np_load_collection,
                             np_dump_collection)
-
+from .bl_datablock import get_datablock_from_uuid
+from .bl_material import dump_materials_slots, load_materials_slots
 
 SPLINE_BEZIER_POINT = [
     # "handle_left_type",
@@ -68,8 +69,6 @@ CURVE_METADATA = [
     'font_bold',
     'font_bold_italic',
     'font_italic',
-    'make_local',
-    'materials',
     'name',
     'offset',
     'offset_x',
@@ -79,7 +78,6 @@ CURVE_METADATA = [
     'override_create',
     'override_library',
     'path_duration',
-    'preview',
     'render_resolution_u',
     'render_resolution_v',
     'resolution_u',
@@ -113,8 +111,6 @@ CURVE_METADATA = [
 ]
 
 
-
-
 SPLINE_METADATA = [
     'hide',
     'material_index',
@@ -141,9 +137,6 @@ SPLINE_METADATA = [
 class BlCurve(BlDatablock):
     bl_id = "curves"
     bl_class = bpy.types.Curve
-    bl_delay_refresh = 1
-    bl_delay_apply = 1
-    bl_automatic_push = True
     bl_check_common = False
     bl_icon = 'CURVE_DATA'
     bl_reload_parent = False
@@ -161,28 +154,27 @@ class BlCurve(BlDatablock):
         for spline in data['splines'].values():
             new_spline = target.splines.new(spline['type'])
 
-
             # Load curve geometry data
             if new_spline.type == 'BEZIER':
                 bezier_points = new_spline.bezier_points
                 bezier_points.add(spline['bezier_points_count'])
-                np_load_collection(spline['bezier_points'], bezier_points, SPLINE_BEZIER_POINT)
+                np_load_collection(
+                    spline['bezier_points'],
+                    bezier_points,
+                    SPLINE_BEZIER_POINT)
 
-            if new_spline.type == 'POLY':
+            if new_spline.type in ['POLY', 'NURBS']:
                 points = new_spline.points
                 points.add(spline['points_count'])
                 np_load_collection(spline['points'], points, SPLINE_POINT)
-            # Not working for now...
-            # See https://blender.stackexchange.com/questions/7020/create-nurbs-surface-with-python
-            if new_spline.type == 'NURBS':
-                logging.error("NURBS not supported.")
-            #     new_spline.points.add(len(data['splines'][spline]["points"])-1)
-            #     for point_index in data['splines'][spline]["points"]:
-            #         loader.load(
-            #             new_spline.points[point_index], data['splines'][spline]["points"][point_index])
 
             loader.load(new_spline, spline)
 
+            # MATERIAL SLOTS
+            src_materials = data.get('materials', None)
+            if src_materials:
+                load_materials_slots(src_materials, target.materials)
+
     def _dump_implementation(self, data, instance=None):
         assert(instance)
         dumper = Dumper()
@@ -210,12 +202,13 @@ class BlCurve(BlDatablock):
             dumper.include_filter = SPLINE_METADATA
             spline_data = dumper.dump(spline)
 
-            if spline.type == 'POLY':
             spline_data['points_count'] = len(spline.points)-1
-                spline_data['points'] = np_dump_collection(spline.points, SPLINE_POINT)
+            spline_data['points'] = np_dump_collection(
+                spline.points, SPLINE_POINT)
 
             spline_data['bezier_points_count'] = len(spline.bezier_points)-1
-            spline_data['bezier_points'] = np_dump_collection(spline.bezier_points, SPLINE_BEZIER_POINT)
+            spline_data['bezier_points'] = np_dump_collection(
+                spline.bezier_points, SPLINE_BEZIER_POINT)
             data['splines'][index] = spline_data
 
         if isinstance(instance, T.SurfaceCurve):
@@ -224,6 +217,9 @@ class BlCurve(BlDatablock):
             data['type'] = 'FONT'
         elif isinstance(instance, T.Curve):
             data['type'] = 'CURVE'
+
+        data['materials'] = dump_materials_slots(instance.materials)
+
         return data
 
     def _resolve_deps_implementation(self):
@@ -238,4 +234,15 @@ class BlCurve(BlDatablock):
                 curve.font_bold_italic,
                 curve.font_italic])
 
+        for material in self.instance.materials:
+            if material:
+                deps.append(material)
+
         return deps
+
+    def diff(self):
+        if 'EDIT' in bpy.context.mode \
+                and not self.preferences.sync_flags.sync_during_editmode:
+            return False
+        else:
+            return super().diff()

multi_user/bl_types/bl_datablock.py

@@ -56,7 +56,7 @@ def load_driver(target_datablock, src_driver):
     loader = Loader()
     drivers = target_datablock.animation_data.drivers
     src_driver_data = src_driver['driver']
-    new_driver = drivers.new(src_driver['data_path'])
+    new_driver = drivers.new(src_driver['data_path'], index=src_driver['array_index'])
 
     # Settings
     new_driver.driver.type = src_driver_data['type']
@@ -106,9 +106,6 @@ class BlDatablock(ReplicatedDatablock):
 
         bl_id :             blender internal storage identifier
         bl_class :          blender internal type
-        bl_delay_refresh :  refresh rate in second for observers
-        bl_delay_apply :    refresh rate in sec for apply
-        bl_automatic_push : boolean
         bl_icon :           type icon (blender icon name) 
         bl_check_common:    enable check even in common rights
         bl_reload_parent:   reload parent
@@ -129,13 +126,7 @@ class BlDatablock(ReplicatedDatablock):
         if instance and hasattr(instance, 'uuid'):
             instance.uuid = self.uuid
 
-        if logging.getLogger().level == logging.DEBUG:
+    def resolve(self, construct = True):
-            self.diff_method = DIFF_JSON
-        else:
-            self.diff_method = DIFF_BINARY
-
-    def resolve(self):
-        datablock_ref = None
         datablock_root = getattr(bpy.data, self.bl_id)
         datablock_ref = utils.find_from_attr('uuid', self.uuid, datablock_root)
 
@@ -143,14 +134,20 @@ class BlDatablock(ReplicatedDatablock):
             try:
                 datablock_ref = datablock_root[self.data['name']]
             except Exception:
+                pass
+
+            if construct and not datablock_ref:
                 name = self.data.get('name')
                 logging.debug(f"Constructing {name}")
                 datablock_ref = self._construct(data=self.data)
 
-            if datablock_ref:
+        if datablock_ref is not None:
             setattr(datablock_ref, 'uuid', self.uuid)
-
             self.instance = datablock_ref
+            return True
+        else:
+            return False
+        
 
     def remove_instance(self):
         """
@@ -203,6 +200,9 @@ class BlDatablock(ReplicatedDatablock):
 
             if 'action' in data['animation_data']:
                 target.animation_data.action = bpy.data.actions[data['animation_data']['action']]
+        # Remove existing animation data if there is not more to load
+        elif hasattr(target, 'animation_data') and target.animation_data:
+            target.animation_data_clear()
 
         if self.is_library:
             return

multi_user/bl_types/bl_file.py

@@ -54,9 +54,6 @@ class BlFile(ReplicatedDatablock):
     bl_id = 'file'
     bl_name = "file"
     bl_class = Path
-    bl_delay_refresh = 2
-    bl_delay_apply = 1
-    bl_automatic_push = True
     bl_check_common = False
     bl_icon = 'FILE'
     bl_reload_parent = True
@@ -69,18 +66,20 @@ class BlFile(ReplicatedDatablock):
             raise FileNotFoundError(str(self.instance))
    
         self.preferences = utils.get_preferences()
-        self.diff_method = DIFF_BINARY
 
-    def resolve(self):
+    def resolve(self, construct = True):
-        if self.data:
         self.instance = Path(get_filepath(self.data['name']))
         
-            if not self.instance.exists():
+        file_exists = self.instance.exists()
+        if not file_exists:
             logging.debug("File don't exist, loading it.")
             self._load(self.data, self.instance)
         
-    def push(self, socket, identity=None):
+        return file_exists
-        super().push(socket, identity=None)
+
+
+    def push(self, socket, identity=None, check_data=False):
+        super().push(socket, identity=None, check_data=False)
         
         if self.preferences.clear_memory_filecache:
                 del self.data['file']

multi_user/bl_types/bl_font.py

@@ -30,9 +30,6 @@ from .dump_anything import Dumper, Loader
 class BlFont(BlDatablock):
     bl_id = "fonts"
     bl_class = bpy.types.VectorFont
-    bl_delay_refresh = 1
-    bl_delay_apply = 1
-    bl_automatic_push = True
     bl_check_common = False
     bl_icon = 'FILE_FONT'
     bl_reload_parent = False

multi_user/bl_types/bl_gpencil.py

@@ -109,7 +109,9 @@ def load_stroke(stroke_data, stroke):
     stroke.points.add(stroke_data["p_count"])
     np_load_collection(stroke_data['points'], stroke.points, STROKE_POINT)
 
-
+    # HACK: Temporary fix to trigger a BKE_gpencil_stroke_geometry_update to 
+    # fix fill issues
+    stroke.uv_scale = stroke_data["uv_scale"]
 
 def dump_frame(frame):
     """ Dump a grease pencil frame to a dict
@@ -226,13 +228,9 @@ def load_layer(layer_data, layer):
         load_frame(frame_data, target_frame)
 
 
-
 class BlGpencil(BlDatablock):
     bl_id = "grease_pencils"
     bl_class = bpy.types.GreasePencil
-    bl_delay_refresh = 2
-    bl_delay_apply = 1
-    bl_automatic_push = True
     bl_check_common = False
     bl_icon = 'GREASEPENCIL'
     bl_reload_parent = False
@@ -265,6 +263,7 @@ class BlGpencil(BlDatablock):
 
                 load_layer(layer_data, target_layer)
 
+            target.layers.update()
 
 
 
@@ -287,6 +286,8 @@ class BlGpencil(BlDatablock):
         for layer in instance.layers:
             data['layers'][layer.info] = dump_layer(layer)
 
+        data["active_layers"] = instance.layers.active.info
+        data["eval_frame"] = bpy.context.scene.frame_current
         return data
 
     def _resolve_deps_implementation(self):
@@ -296,3 +297,18 @@ class BlGpencil(BlDatablock):
             deps.append(material)
 
         return deps
+
+    def layer_changed(self):
+        return self.instance.layers.active.info != self.data["active_layers"]
+
+    def frame_changed(self):
+        return  bpy.context.scene.frame_current != self.data["eval_frame"]
+
+    def diff(self):
+        if self.layer_changed() \
+                or self.frame_changed() \
+                or bpy.context.mode == 'OBJECT' \
+                or self.preferences.sync_flags.sync_during_editmode:
+            return super().diff()
+        else:
+            return False

multi_user/bl_types/bl_image.py

@@ -51,9 +51,6 @@ format_to_ext = {
 class BlImage(BlDatablock):
     bl_id = "images"
     bl_class = bpy.types.Image
-    bl_delay_refresh = 2
-    bl_delay_apply = 1
-    bl_automatic_push = True
     bl_check_common = False
     bl_icon = 'IMAGE_DATA'
     bl_reload_parent = False

multi_user/bl_types/bl_lattice.py

@@ -29,9 +29,6 @@ POINT = ['co', 'weight_softbody', 'co_deform']
 class BlLattice(BlDatablock):
     bl_id = "lattices"
     bl_class = bpy.types.Lattice
-    bl_delay_refresh = 1
-    bl_delay_apply = 1
-    bl_automatic_push = True
     bl_check_common = False
     bl_icon = 'LATTICE_DATA'
     bl_reload_parent = False

multi_user/bl_types/bl_library.py

@@ -26,9 +26,6 @@ from .bl_datablock import BlDatablock
 class BlLibrary(BlDatablock):
     bl_id = "libraries"
     bl_class = bpy.types.Library
-    bl_delay_refresh = 1
-    bl_delay_apply = 1
-    bl_automatic_push = True
     bl_check_common = False
     bl_icon = 'LIBRARY_DATA_DIRECT'
     bl_reload_parent = False

multi_user/bl_types/bl_light.py

@@ -26,9 +26,6 @@ from .bl_datablock import BlDatablock
 class BlLight(BlDatablock):
     bl_id = "lights"
     bl_class = bpy.types.Light
-    bl_delay_refresh = 1
-    bl_delay_apply = 1
-    bl_automatic_push = True
     bl_check_common = False
     bl_icon = 'LIGHT_DATA'
     bl_reload_parent = False

multi_user/bl_types/bl_lightprobe.py

@@ -27,9 +27,6 @@ from .bl_datablock import BlDatablock
 class BlLightprobe(BlDatablock):
     bl_id = "lightprobes"
     bl_class = bpy.types.LightProbe
-    bl_delay_refresh = 1
-    bl_delay_apply = 1
-    bl_automatic_push = True
     bl_check_common = False
     bl_icon = 'LIGHTPROBE_GRID'
     bl_reload_parent = False

multi_user/bl_types/bl_material.py

@@ -27,9 +27,9 @@ from .dump_anything import Loader, Dumper
 from .bl_datablock import BlDatablock, get_datablock_from_uuid
 
 NODE_SOCKET_INDEX = re.compile('\[(\d*)\]')
+IGNORED_SOCKETS = ['GEOMETRY', 'SHADER', 'CUSTOM']
 
-
+def load_node(node_data: dict, node_tree: bpy.types.ShaderNodeTree):
-def load_node(node_data, node_tree):
     """ Load a node into a node_tree from a dict
 
         :arg node_data: dumped node data
@@ -52,27 +52,135 @@ def load_node(node_data, node_tree):
 
     inputs_data = node_data.get('inputs')
     if inputs_data:
-        inputs = target_node.inputs
+        inputs = [i for i in target_node.inputs if i.type not in IGNORED_SOCKETS]
-        for idx, inpt in enumerate(inputs_data):
+        for idx, inpt in enumerate(inputs):
-            if idx < len(inputs) and hasattr(inputs[idx], "default_value"):
+            if idx < len(inputs_data) and hasattr(inpt, "default_value"):
+                loaded_input = inputs_data[idx]
                 try:
-                    inputs[idx].default_value = inpt
+                    if inpt.type in ['OBJECT', 'COLLECTION']:
+                        inpt.default_value = get_datablock_from_uuid(loaded_input, None)
+                    else:
+                        inpt.default_value = loaded_input
                 except Exception as e:
-                    logging.warning(f"Node {target_node.name} input {inputs[idx].name} parameter not supported, skipping ({e})")
+                    logging.warning(f"Node {target_node.name} input {inpt.name} parameter not supported, skipping ({e})")
             else:
                 logging.warning(f"Node {target_node.name} input length mismatch.")
 
     outputs_data = node_data.get('outputs')
     if outputs_data:
-        outputs = target_node.outputs
+        outputs = [o for o in target_node.outputs if o.type not in IGNORED_SOCKETS]
-        for idx, output in enumerate(outputs_data):
+        for idx, output in enumerate(outputs):
-            if idx < len(outputs) and hasattr(outputs[idx], "default_value"):
+            if idx < len(outputs_data) and hasattr(output, "default_value"):
+                loaded_output = outputs_data[idx]
                 try:
-                    outputs[idx].default_value = output
+                    if output.type in ['OBJECT', 'COLLECTION']:
-                except:
+                        output.default_value = get_datablock_from_uuid(loaded_output, None)
-                    logging.warning(f"Node {target_node.name} output {outputs[idx].name} parameter not supported, skipping ({e})")
                     else:
-                logging.warning(f"Node {target_node.name} output length mismatch.")
+                        output.default_value = loaded_output
+                except Exception as e:
+                    logging.warning(
+                        f"Node {target_node.name} output {output.name} parameter not supported, skipping ({e})")
+            else:
+                logging.warning(
+                    f"Node {target_node.name} output length mismatch.")
+
+
+def dump_node(node: bpy.types.ShaderNode) -> dict:
+    """ Dump a single node to a dict
+
+        :arg node: target node
+        :type node: bpy.types.Node
+        :retrun: dict
+    """
+
+    node_dumper = Dumper()
+    node_dumper.depth = 1
+    node_dumper.exclude_filter = [
+        "dimensions",
+        "show_expanded",
+        "name_full",
+        "select",
+        "bl_label",
+        "bl_height_min",
+        "bl_height_max",
+        "bl_height_default",
+        "bl_width_min",
+        "bl_width_max",
+        "type",
+        "bl_icon",
+        "bl_width_default",
+        "bl_static_type",
+        "show_tetxure",
+        "is_active_output",
+        "hide",
+        "show_options",
+        "show_preview",
+        "show_texture",
+        "outputs",
+        "width_hidden",
+        "image"
+    ]
+
+    dumped_node = node_dumper.dump(node)
+
+    if node.parent:
+        dumped_node['parent'] = node.parent.name
+
+    dump_io_needed = (node.type not in ['REROUTE', 'OUTPUT_MATERIAL'])
+
+    if dump_io_needed:
+        io_dumper = Dumper()
+        io_dumper.depth = 2
+        io_dumper.include_filter = ["default_value"]
+
+        if hasattr(node, 'inputs'):
+            dumped_node['inputs'] = []
+            inputs = [i for i in node.inputs if i.type not in IGNORED_SOCKETS]
+            for idx, inpt in enumerate(inputs):
+                if hasattr(inpt, 'default_value'):
+                    if isinstance(inpt.default_value, bpy.types.ID):
+                        dumped_input = inpt.default_value.uuid
+                    else:
+                        dumped_input = io_dumper.dump(inpt.default_value)
+
+                    dumped_node['inputs'].append(dumped_input)
+
+        if hasattr(node, 'outputs'):
+            dumped_node['outputs'] = []
+            for idx, output in enumerate(node.outputs):
+                if output.type not in IGNORED_SOCKETS:
+                    if hasattr(output, 'default_value'):
+                        dumped_node['outputs'].append(
+                            io_dumper.dump(output.default_value))
+
+    if hasattr(node, 'color_ramp'):
+        ramp_dumper = Dumper()
+        ramp_dumper.depth = 4
+        ramp_dumper.include_filter = [
+            'elements',
+            'alpha',
+            'color',
+            'position',
+            'interpolation',
+            'hue_interpolation',
+            'color_mode'
+        ]
+        dumped_node['color_ramp'] = ramp_dumper.dump(node.color_ramp)
+    if hasattr(node, 'mapping'):
+        curve_dumper = Dumper()
+        curve_dumper.depth = 5
+        curve_dumper.include_filter = [
+            'curves',
+            'points',
+            'location'
+        ]
+        dumped_node['mapping'] = curve_dumper.dump(node.mapping)
+    if hasattr(node, 'image') and getattr(node, 'image'):
+        dumped_node['image_uuid'] = node.image.uuid
+    if hasattr(node, 'node_tree') and getattr(node, 'node_tree'):
+        dumped_node['node_tree_uuid'] = node.node_tree.uuid
+    return dumped_node
+
 
 
 def load_links(links_data, node_tree):
@@ -117,92 +225,7 @@ def dump_links(links):
     return links_data
 
 
-def dump_node(node):
+def dump_node_tree(node_tree: bpy.types.ShaderNodeTree) -> dict:
-    """ Dump a single node to a dict
-
-        :arg node: target node
-        :type node: bpy.types.Node
-        :retrun: dict
-    """
-
-    node_dumper = Dumper()
-    node_dumper.depth = 1
-    node_dumper.exclude_filter = [
-        "dimensions",
-        "show_expanded",
-        "name_full",
-        "select",
-        "bl_label",
-        "bl_height_min",
-        "bl_height_max",
-        "bl_height_default",
-        "bl_width_min",
-        "bl_width_max",
-        "type",
-        "bl_icon",
-        "bl_width_default",
-        "bl_static_type",
-        "show_tetxure",
-        "is_active_output",
-        "hide",
-        "show_options",
-        "show_preview",
-        "show_texture",
-        "outputs",
-        "width_hidden",
-        "image"
-    ]
-
-    dumped_node = node_dumper.dump(node)
-
-    dump_io_needed = (node.type not in ['REROUTE','OUTPUT_MATERIAL'])
-
-    if dump_io_needed:
-        io_dumper = Dumper()
-        io_dumper.depth = 2
-        io_dumper.include_filter = ["default_value"]
-
-        if hasattr(node, 'inputs'):
-            dumped_node['inputs'] = []
-            for idx, inpt in enumerate(node.inputs):
-                if hasattr(inpt, 'default_value'):
-                    dumped_node['inputs'].append(io_dumper.dump(inpt.default_value))
-
-        if hasattr(node, 'outputs'):
-            dumped_node['outputs'] = []
-            for idx, output in enumerate(node.outputs):
-                if hasattr(output, 'default_value'):
-                    dumped_node['outputs'].append(io_dumper.dump(output.default_value))
-
-    if hasattr(node, 'color_ramp'):
-        ramp_dumper = Dumper()
-        ramp_dumper.depth = 4
-        ramp_dumper.include_filter = [
-            'elements',
-            'alpha',
-            'color',
-            'position',
-            'interpolation',
-            'color_mode'
-        ]
-        dumped_node['color_ramp'] = ramp_dumper.dump(node.color_ramp)
-    if hasattr(node, 'mapping'):
-        curve_dumper = Dumper()
-        curve_dumper.depth = 5
-        curve_dumper.include_filter = [
-            'curves',
-            'points',
-            'location'
-        ]
-        dumped_node['mapping'] = curve_dumper.dump(node.mapping)
-    if hasattr(node, 'image') and getattr(node, 'image'):
-        dumped_node['image_uuid'] = node.image.uuid
-    if hasattr(node, 'node_tree') and getattr(node, 'node_tree'):
-        dumped_node['node_tree_uuid'] = node.node_tree.uuid
-    return dumped_node
-
-
-def dump_shader_node_tree(node_tree: bpy.types.ShaderNodeTree) -> dict:
     """ Dump a shader node_tree to a dict including links and nodes
 
         :arg node_tree: dumped shader node tree
@@ -244,6 +267,7 @@ def dump_node_tree_sockets(sockets: bpy.types.Collection)->dict:
 
     return sockets_data
 
+
 def load_node_tree_sockets(sockets: bpy.types.Collection,
                            sockets_data: dict):
     """ load sockets of a shader_node_tree
@@ -257,7 +281,7 @@ def load_node_tree_sockets(sockets: bpy.types.Collection,
     """
     # Check for removed sockets
     for socket in sockets:
-        if not [s for s in sockets_data if socket['uuid'] == s[2]]:
+        if not [s for s in sockets_data if 'uuid' in socket and socket['uuid'] == s[2]]:
             sockets.remove(socket)
 
     # Check for new sockets
@@ -271,7 +295,7 @@ def load_node_tree_sockets(sockets: bpy.types.Collection,
             s['uuid'] = socket_data[2]
 
 
-def load_shader_node_tree(node_tree_data:dict, target_node_tree:bpy.types.ShaderNodeTree)->dict:
+def load_node_tree(node_tree_data: dict, target_node_tree: bpy.types.ShaderNodeTree) -> dict:
     """Load a shader node_tree from dumped data
 
         :arg node_tree_data: dumped node data
@@ -297,6 +321,14 @@ def load_shader_node_tree(node_tree_data:dict, target_node_tree:bpy.types.Shader
     for node in node_tree_data["nodes"]:
         load_node(node_tree_data["nodes"][node], target_node_tree)
 
+    for node_id, node_data in node_tree_data["nodes"].items():
+        target_node = target_node_tree.nodes.get(node_id, None)
+        if target_node is None:
+            continue
+        elif 'parent' in node_data:
+            target_node.parent =  target_node_tree.nodes[node_data['parent']]
+        else:
+            target_node.parent = None
     # TODO: load only required nodes links
     # Load nodes links
     target_node_tree.links.clear()
@@ -305,9 +337,14 @@ def load_shader_node_tree(node_tree_data:dict, target_node_tree:bpy.types.Shader
 
 
 def get_node_tree_dependencies(node_tree: bpy.types.NodeTree) -> list:
-    has_image = lambda node : (node.type in ['TEX_IMAGE', 'TEX_ENVIRONMENT'] and node.image)
+    def has_image(node): return (
-    has_node_group = lambda node : (hasattr(node,'node_tree') and node.node_tree)
+        node.type in ['TEX_IMAGE', 'TEX_ENVIRONMENT'] and node.image)
 
+    def has_node_group(node): return (
+        hasattr(node, 'node_tree') and node.node_tree)
+
+    def has_texture(node): return (
+        node.type in ['ATTRIBUTE_SAMPLE_TEXTURE','TEXTURE']  and node.texture)
     deps = []
 
     for node in node_tree.nodes:
@@ -315,16 +352,46 @@ def get_node_tree_dependencies(node_tree: bpy.types.NodeTree) -> list:
             deps.append(node.image)
         elif has_node_group(node):
             deps.append(node.node_tree)
+        elif has_texture(node):
+            deps.append(node.texture)
 
     return deps
 
 
+def dump_materials_slots(materials: bpy.types.bpy_prop_collection) -> list:
+    """ Dump material slots collection
+
+        :arg materials: material slots collection to dump
+        :type materials: bpy.types.bpy_prop_collection
+        :return: list of tuples (mat_uuid, mat_name)
+    """
+    return [(m.uuid, m.name) for m in materials if m]
+
+
+def load_materials_slots(src_materials: list, dst_materials: bpy.types.bpy_prop_collection):
+    """ Load material slots
+
+        :arg src_materials: dumped material collection (ex: object.materials)
+        :type src_materials: list of tuples (uuid, name) 
+        :arg dst_materials: target material collection pointer
+        :type dst_materials: bpy.types.bpy_prop_collection
+    """
+    # MATERIAL SLOTS
+    dst_materials.clear()
+
+    for mat_uuid, mat_name in src_materials:
+        mat_ref = None
+        if mat_uuid is not None:
+            mat_ref = get_datablock_from_uuid(mat_uuid, None)
+        else:
+            mat_ref = bpy.data.materials[mat_name]
+
+        dst_materials.append(mat_ref)
+
+
 class BlMaterial(BlDatablock):
     bl_id = "materials"
     bl_class = bpy.types.Material
-    bl_delay_refresh = 1
-    bl_delay_apply = 1
-    bl_automatic_push = True
     bl_check_common = False
     bl_icon = 'MATERIAL_DATA'
     bl_reload_parent = False
@@ -348,7 +415,7 @@ class BlMaterial(BlDatablock):
             if target.node_tree is None:
                 target.use_nodes = True
 
-            load_shader_node_tree(data['node_tree'], target.node_tree)
+            load_node_tree(data['node_tree'], target.node_tree)
 
     def _dump_implementation(self, data, instance=None):
         assert(instance)
@@ -409,10 +476,13 @@ class BlMaterial(BlDatablock):
                 'fill_style',
                 'gradient_type',
                 # 'fill_image',
+                'use_stroke_holdout',
+                'use_overlap_strokes',
+                'use_fill_holdout',
             ]
             data['grease_pencil'] = gp_mat_dumper.dump(instance.grease_pencil)
         elif instance.use_nodes:
-            data['node_tree'] = dump_shader_node_tree(instance.node_tree)
+            data['node_tree'] = dump_node_tree(instance.node_tree)
 
         return data
 

multi_user/bl_types/bl_mesh.py

@@ -26,6 +26,7 @@ from .dump_anything import Dumper, Loader, np_load_collection_primitives, np_dum
 from replication.constants import DIFF_BINARY
 from replication.exception import ContextError
 from .bl_datablock import BlDatablock, get_datablock_from_uuid
+from .bl_material import dump_materials_slots, load_materials_slots
 
 VERTICE = ['co']
 
@@ -33,6 +34,8 @@ EDGE = [
     'vertices',
     'crease',
     'bevel_weight',
+    'use_seam',
+    'use_edge_sharp',
 ]
 LOOP = [
     'vertex_index',
@@ -49,12 +52,9 @@ POLYGON = [
 class BlMesh(BlDatablock):
     bl_id = "meshes"
     bl_class = bpy.types.Mesh
-    bl_delay_refresh = 2
-    bl_delay_apply = 1
-    bl_automatic_push = True
     bl_check_common = False
     bl_icon = 'MESH_DATA'
-    bl_reload_parent = False
+    bl_reload_parent = True
 
     def _construct(self, data):
         instance = bpy.data.meshes.new(data["name"])
@@ -69,19 +69,9 @@ class BlMesh(BlDatablock):
             loader.load(target, data)
 
             # MATERIAL SLOTS
-            target.materials.clear()
+            src_materials = data.get('materials', None)
-
+            if src_materials:
-            for mat_uuid, mat_name in data["material_list"]:
+                load_materials_slots(src_materials, target.materials)
-                mat_ref = None
-                if mat_uuid is not None:
-                    mat_ref = get_datablock_from_uuid(mat_uuid, None)
-                else:
-                    mat_ref = bpy.data.materials.get(mat_name, None)
-
-                if mat_ref is None:
-                    raise Exception("Material doesn't exist")
-
-                target.materials.append(mat_ref)
 
             # CLEAR GEOMETRY
             if target.vertices:
@@ -126,7 +116,7 @@ class BlMesh(BlDatablock):
     def _dump_implementation(self, data, instance=None):
         assert(instance)
 
-        if instance.is_editmode and not self.preferences.sync_flags.sync_during_editmode:
+        if (instance.is_editmode or bpy.context.mode == "SCULPT") and not self.preferences.sync_flags.sync_during_editmode:
             raise ContextError("Mesh is in edit mode")
         mesh = instance
 
@@ -172,9 +162,8 @@ class BlMesh(BlDatablock):
                 data['vertex_colors'][color_map.name] = {}
                 data['vertex_colors'][color_map.name]['data'] = np_dump_collection_primitive(color_map.data, 'color')
 
-        # Fix material index
+        # Materials
-        data['material_list'] = [(m.uuid, m.name) for m in instance.materials if m]
+        data['materials'] = dump_materials_slots(instance.materials)
-
         return data
 
     def _resolve_deps_implementation(self):
@@ -185,3 +174,10 @@ class BlMesh(BlDatablock):
                 deps.append(material)
 
         return deps
+
+    def diff(self):
+        if 'EDIT' in bpy.context.mode \
+                and not self.preferences.sync_flags.sync_during_editmode:
+            return False
+        else:
+            return super().diff()

multi_user/bl_types/bl_metaball.py

@@ -65,9 +65,6 @@ def load_metaball_elements(elements_data, elements):
 class BlMetaball(BlDatablock):
     bl_id = "metaballs"
     bl_class = bpy.types.MetaBall
-    bl_delay_refresh = 1
-    bl_delay_apply = 1
-    bl_automatic_push = True
     bl_check_common = False
     bl_icon = 'META_BALL'
     bl_reload_parent = False

multi_user/bl_types/bl_node_group.py

@@ -21,16 +21,13 @@ import mathutils
 
 from .dump_anything import Dumper, Loader, np_dump_collection, np_load_collection
 from .bl_datablock import BlDatablock
-from .bl_material import (dump_shader_node_tree,
+from .bl_material import (dump_node_tree,
-                          load_shader_node_tree,
+                          load_node_tree,
                           get_node_tree_dependencies)
 
 class BlNodeGroup(BlDatablock):
     bl_id = "node_groups"
-    bl_class = bpy.types.ShaderNodeTree
+    bl_class = bpy.types.NodeTree
-    bl_delay_refresh = 1
-    bl_delay_apply = 1
-    bl_automatic_push = True
     bl_check_common = False
     bl_icon = 'NODETREE'
     bl_reload_parent = False
@@ -39,10 +36,10 @@ class BlNodeGroup(BlDatablock):
         return bpy.data.node_groups.new(data["name"], data["type"])
 
     def _load_implementation(self, data, target):
-        load_shader_node_tree(data, target)
+        load_node_tree(data, target)
 
     def _dump_implementation(self, data, instance=None):
-        return dump_shader_node_tree(instance)
+        return dump_node_tree(instance)
 
     def _resolve_deps_implementation(self):
         return get_node_tree_dependencies(self.instance)

multi_user/bl_types/bl_object.py

@@ -17,13 +17,139 @@
 
 
 import logging
-
+import re
 import bpy
 import mathutils
 from replication.exception import ContextError
 
 from .bl_datablock import BlDatablock, get_datablock_from_uuid
-from .dump_anything import Dumper, Loader
+from .bl_material import IGNORED_SOCKETS
+from .dump_anything import (
+    Dumper,
+    Loader,
+    np_load_collection,
+    np_dump_collection)
+
+
+SKIN_DATA = [
+    'radius',
+    'use_loose',
+    'use_root'
+]
+
+if bpy.app.version[1] >= 93:
+    SUPPORTED_GEOMETRY_NODE_PARAMETERS = (int, str, float)
+else:
+    SUPPORTED_GEOMETRY_NODE_PARAMETERS = (int, str)
+    logging.warning("Geometry node Float parameter not supported in \
+                    blender 2.92.")
+
+def get_node_group_inputs(node_group):
+    inputs = []
+    for inpt in node_group.inputs:
+        if inpt.type in IGNORED_SOCKETS:
+            continue
+        else:
+            inputs.append(inpt)
+    return inputs
+    # return [inpt.identifer for inpt in node_group.inputs if  inpt.type not in IGNORED_SOCKETS]
+
+
+def dump_physics(target: bpy.types.Object)->dict:
+    """ 
+        Dump all physics settings from a given object excluding modifier 
+        related physics settings (such as softbody, cloth, dynapaint and fluid) 
+    """
+    dumper = Dumper()
+    dumper.depth = 1
+    physics_data = {}
+
+    # Collisions (collision)
+    if target.collision and target.collision.use:
+        physics_data['collision'] = dumper.dump(target.collision)
+
+    # Field (field)
+    if target.field and target.field.type != "NONE":
+        physics_data['field'] = dumper.dump(target.field)
+
+    # Rigid Body (rigid_body)
+    if target.rigid_body:
+        physics_data['rigid_body'] = dumper.dump(target.rigid_body)
+
+    # Rigid Body constraint (rigid_body_constraint)
+    if target.rigid_body_constraint:
+        physics_data['rigid_body_constraint'] = dumper.dump(target.rigid_body_constraint)
+
+    return physics_data
+
+def load_physics(dumped_settings: dict, target: bpy.types.Object):
+    """  Load all physics settings from a given object excluding modifier 
+        related physics settings (such as softbody, cloth, dynapaint and fluid) 
+    """
+    loader = Loader()
+
+    if 'collision' in dumped_settings:
+        loader.load(target.collision, dumped_settings['collision'])
+
+    if 'field' in dumped_settings:
+        loader.load(target.field, dumped_settings['field'])
+
+    if 'rigid_body' in dumped_settings:
+        if not target.rigid_body:
+            bpy.ops.rigidbody.object_add({"object": target})
+        loader.load(target.rigid_body, dumped_settings['rigid_body'])
+    elif target.rigid_body:
+        bpy.ops.rigidbody.object_remove({"object": target})
+
+    if 'rigid_body_constraint' in dumped_settings:
+        if not target.rigid_body_constraint:
+            bpy.ops.rigidbody.constraint_add({"object": target})
+        loader.load(target.rigid_body_constraint, dumped_settings['rigid_body_constraint'])
+    elif target.rigid_body_constraint:
+        bpy.ops.rigidbody.constraint_remove({"object": target})
+    
+def dump_modifier_geometry_node_inputs(modifier: bpy.types.Modifier) -> list:
+    """ Dump geometry node modifier input properties
+
+        :arg modifier: geometry node modifier to dump
+        :type modifier: bpy.type.Modifier
+    """
+    dumped_inputs = []
+    for inpt in get_node_group_inputs(modifier.node_group):
+        input_value = modifier[inpt.identifier]
+
+        dumped_input = None
+        if isinstance(input_value, bpy.types.ID):
+            dumped_input = input_value.uuid
+        elif isinstance(input_value, SUPPORTED_GEOMETRY_NODE_PARAMETERS):
+            dumped_input = input_value
+        elif hasattr(input_value, 'to_list'):
+            dumped_input = input_value.to_list()
+        dumped_inputs.append(dumped_input)
+
+    return dumped_inputs
+
+
+def load_modifier_geometry_node_inputs(dumped_modifier: dict, target_modifier: bpy.types.Modifier):
+    """ Load geometry node modifier inputs
+
+        :arg dumped_modifier: source dumped modifier to load
+        :type dumped_modifier: dict
+        :arg target_modifier: target geometry node modifier
+        :type target_modifier: bpy.type.Modifier
+    """
+
+    for input_index, inpt in enumerate(get_node_group_inputs(target_modifier.node_group)):
+        dumped_value = dumped_modifier['inputs'][input_index]
+        input_value = target_modifier[inpt.identifier]
+        if isinstance(input_value, SUPPORTED_GEOMETRY_NODE_PARAMETERS):
+            target_modifier[inpt.identifier] = dumped_value
+        elif hasattr(input_value, 'to_list'):
+            for index in range(len(input_value)):
+                input_value[index] = dumped_value[index]
+        elif inpt.type in ['COLLECTION', 'OBJECT']:
+            target_modifier[inpt.identifier] = get_datablock_from_uuid(
+                dumped_value, None)
 
 
 def load_pose(target_bone, data):
@@ -81,25 +207,91 @@ def _is_editmode(object: bpy.types.Object) -> bool:
             child_data.is_editmode)
 
 
-def find_textures_dependencies(collection):
+def find_textures_dependencies(modifiers: bpy.types.bpy_prop_collection) -> [bpy.types.Texture]:
-    """ Check collection
+    """ Find textures lying in a modifier stack
+
+        :arg modifiers: modifiers collection
+        :type modifiers: bpy.types.bpy_prop_collection
+        :return: list of bpy.types.Texture pointers
     """
     textures = []
-    for item in collection:
+    for mod in modifiers:
-        for attr in dir(item):
+        modifier_attributes = [getattr(mod, attr_name)
-            inst = getattr(item, attr)
+                               for attr_name in mod.bl_rna.properties.keys()]
-            if issubclass(type(inst), bpy.types.Texture) and inst is not None:
+        for attr in modifier_attributes:
-                textures.append(inst)
+            if issubclass(type(attr), bpy.types.Texture) and attr is not None:
+                textures.append(attr)
 
     return textures
 
 
+def find_geometry_nodes_dependencies(modifiers: bpy.types.bpy_prop_collection) -> [bpy.types.NodeTree]:
+    """ Find geometry nodes dependencies from a modifier stack
+
+        :arg modifiers: modifiers collection
+        :type modifiers: bpy.types.bpy_prop_collection
+        :return: list of bpy.types.NodeTree pointers
+    """
+    dependencies = []
+    for mod in modifiers:
+        if mod.type == 'NODES' and mod.node_group:
+            dependencies.append(mod.node_group)
+            # for inpt in get_node_group_inputs(mod.node_group):
+            #     parameter = mod.get(inpt.identifier)
+            #     if parameter and isinstance(parameter, bpy.types.ID):
+            #         dependencies.append(parameter)
+
+    return dependencies
+
+
+def dump_vertex_groups(src_object: bpy.types.Object) -> dict:
+    """ Dump object's vertex groups
+
+        :param target_object: dump vertex groups of this object
+        :type  target_object: bpy.types.Object
+    """
+    if isinstance(src_object.data, bpy.types.GreasePencil):
+        logging.warning(
+            "Grease pencil vertex groups are not supported yet. More info: https://gitlab.com/slumber/multi-user/-/issues/161")
+    else:
+        points_attr = 'vertices' if isinstance(
+            src_object.data, bpy.types.Mesh) else 'points'
+        dumped_vertex_groups = {}
+
+        # Vertex group metadata
+        for vg in src_object.vertex_groups:
+            dumped_vertex_groups[vg.index] = {
+                'name': vg.name,
+                'vertices': []
+            }
+
+        # Vertex group assignation
+        for vert in getattr(src_object.data, points_attr):
+            for vg in vert.groups:
+                vertices = dumped_vertex_groups.get(vg.group)['vertices']
+                vertices.append((vert.index, vg.weight))
+
+    return dumped_vertex_groups
+
+
+def load_vertex_groups(dumped_vertex_groups: dict, target_object: bpy.types.Object):
+    """ Load object vertex groups
+
+        :param dumped_vertex_groups: vertex_groups to load
+        :type dumped_vertex_groups: dict
+        :param target_object: object to load the vertex groups into
+        :type  target_object: bpy.types.Object
+    """
+    target_object.vertex_groups.clear()
+    for vg in dumped_vertex_groups.values():
+        vertex_group = target_object.vertex_groups.new(name=vg['name'])
+        for index, weight in vg['vertices']:
+            vertex_group.add([index], weight, 'REPLACE')
+
+
 class BlObject(BlDatablock):
     bl_id = "objects"
     bl_class = bpy.types.Object
-    bl_delay_refresh = 1
-    bl_delay_apply = 1
-    bl_automatic_push = True
     bl_check_common = False
     bl_icon = 'OBJECT_DATA'
     bl_reload_parent = False
@@ -125,6 +317,10 @@ class BlObject(BlDatablock):
             data_uuid,
             find_data_from_name(data_id),
             ignore=['images'])  # TODO: use resolve_from_id
+
+        if object_data is None and data_uuid:
+            raise Exception(f"Fail to load object {data['name']}({self.uuid})")
+
         instance = bpy.data.objects.new(object_name, object_data)
         instance.uuid = self.uuid
 
@@ -141,21 +337,16 @@ class BlObject(BlDatablock):
                 data_uuid, find_data_from_name(data_id), ignore=['images'])
 
         # vertex groups
-        if 'vertex_groups' in data:
+        vertex_groups = data.get('vertex_groups', None)
-            target.vertex_groups.clear()
+        if vertex_groups:
-            for vg in data['vertex_groups']:
+            load_vertex_groups(vertex_groups, target)
-                vertex_group = target.vertex_groups.new(name=vg['name'])
+
-                point_attr = 'vertices' if 'vertices' in vg else 'points'
+        object_data = target.data
-                for vert in vg[point_attr]:
-                    vertex_group.add(
-                        [vert['index']], vert['weight'], 'REPLACE')
 
         # SHAPE KEYS
         if 'shape_keys' in data:
             target.shape_key_clear()
 
-            object_data = target.data
-
             # Create keys and load vertices coords
             for key_block in data['shape_keys']['key_blocks']:
                 key_data = data['shape_keys']['key_blocks'][key_block]
@@ -175,8 +366,20 @@ class BlObject(BlDatablock):
         # Load transformation data
         loader.load(target, data)
 
+        #  Object display fields
+        if 'display' in data:
             loader.load(target.display, data['display'])
 
+        #  Parenting
+        parent_id = data.get('parent_uid')
+        if parent_id:
+            parent = get_datablock_from_uuid(parent_id[0], bpy.data.objects[parent_id[1]])
+            # Avoid reloading
+            if target.parent != parent and parent is not None:
+                target.parent = parent
+        elif target.parent:
+            target.parent = None
+
         # Pose
         if 'pose' in data:
             if not target.pose:
@@ -211,6 +414,59 @@ class BlObject(BlDatablock):
             if target.data is None and img_uuid:
                 target.data = get_datablock_from_uuid(img_uuid, None)
 
+        if hasattr(object_data, 'skin_vertices') \
+                and object_data.skin_vertices\
+                and 'skin_vertices' in data:
+            for index, skin_data in enumerate(object_data.skin_vertices):
+                np_load_collection(
+                    data['skin_vertices'][index],
+                    skin_data.data,
+                    SKIN_DATA)
+
+        if hasattr(target, 'cycles_visibility') \
+                and 'cycles_visibility' in data:
+            loader.load(target.cycles_visibility, data['cycles_visibility'])
+
+        # TODO: handle geometry nodes input from dump_anything
+        if hasattr(target, 'modifiers'):
+            nodes_modifiers = [
+                mod for mod in target.modifiers if mod.type == 'NODES']
+            for modifier in nodes_modifiers:
+                load_modifier_geometry_node_inputs(
+                    data['modifiers'][modifier.name], modifier)
+
+            particles_modifiers = [
+                mod for mod in target.modifiers if mod.type == 'PARTICLE_SYSTEM']
+
+            for mod in particles_modifiers:
+                default =  mod.particle_system.settings
+                dumped_particles = data['modifiers'][mod.name]['particle_system']
+                loader.load(mod.particle_system, dumped_particles)
+
+                settings = get_datablock_from_uuid(dumped_particles['settings_uuid'], None)
+                if settings:
+                    mod.particle_system.settings = settings
+                    # Hack to remove the default generated particle settings
+                    if not default.uuid:
+                        bpy.data.particles.remove(default)
+
+            phys_modifiers = [
+                mod for mod in target.modifiers if mod.type in ['SOFT_BODY', 'CLOTH']]
+            
+            for mod in phys_modifiers:
+                loader.load(mod.settings, data['modifiers'][mod.name]['settings'])
+
+        # PHYSICS
+        load_physics(data, target)
+
+        transform = data.get('transforms', None)
+        if transform:
+            target.matrix_parent_inverse = mathutils.Matrix(
+                transform['matrix_parent_inverse'])
+            target.matrix_basis = mathutils.Matrix(transform['matrix_basis'])
+            target.matrix_local = mathutils.Matrix(transform['matrix_local'])
+
+
     def _dump_implementation(self, data, instance=None):
         assert(instance)
 
@@ -225,9 +481,7 @@ class BlObject(BlDatablock):
         dumper.include_filter = [
             "name",
             "rotation_mode",
-            "parent",
             "data",
-            "children",
             "library",
             "empty_display_type",
             "empty_display_size",
@@ -241,8 +495,6 @@ class BlObject(BlDatablock):
             "color",
             "instance_collection",
             "instance_type",
-            "location",
-            "scale",
             'lock_location',
             'lock_rotation',
             'lock_scale',
@@ -256,12 +508,16 @@ class BlObject(BlDatablock):
             'show_all_edges',
             'show_texture_space',
             'show_in_front',
-            'type',
+            'type'
-            'rotation_quaternion' if instance.rotation_mode == 'QUATERNION' else 'rotation_euler',
         ]
 
         data = dumper.dump(instance)
 
+        dumper.include_filter = [
+            'matrix_parent_inverse',
+            'matrix_local',
+            'matrix_basis']
+        data['transforms'] = dumper.dump(instance)
         dumper.include_filter = [
             'show_shadows',
         ]
@@ -271,14 +527,39 @@ class BlObject(BlDatablock):
         if self.is_library:
             return data
 
+        # PARENTING
+        if instance.parent:
+            data['parent_uid'] = (instance.parent.uuid, instance.parent.name)
+
         # MODIFIERS
+        if hasattr(instance, 'modifiers'):
+            data["modifiers"] = {}
             modifiers = getattr(instance, 'modifiers', None)
             if modifiers:
                 dumper.include_filter = None
                 dumper.depth = 1
-            data["modifiers"] = {}
+                dumper.exclude_filter = ['is_active']
                 for index, modifier in enumerate(modifiers):
-                data["modifiers"][modifier.name] = dumper.dump(modifier)
+                    dumped_modifier = dumper.dump(modifier)
+                    # hack to dump geometry nodes inputs
+                    if modifier.type == 'NODES':
+                        dumped_inputs = dump_modifier_geometry_node_inputs(
+                            modifier)
+                        dumped_modifier['inputs'] = dumped_inputs
+
+                    elif modifier.type == 'PARTICLE_SYSTEM':
+                        dumper.exclude_filter = [
+                            "is_edited",
+                            "is_editable",
+                            "is_global_hair"
+                        ]
+                        dumped_modifier['particle_system'] = dumper.dump(modifier.particle_system)
+                        dumped_modifier['particle_system']['settings_uuid'] = modifier.particle_system.settings.uuid
+
+                    elif modifier.type in ['SOFT_BODY', 'CLOTH']:
+                        dumped_modifier['settings'] = dumper.dump(modifier.settings)
+
+                    data["modifiers"][modifier.name] = dumped_modifier
 
         gp_modifiers = getattr(instance, 'grease_pencil_modifiers', None)
 
@@ -301,8 +582,10 @@ class BlObject(BlDatablock):
                         'location']
                     gp_mod_data['curve'] = curve_dumper.dump(modifier.curve)
 
+
         # CONSTRAINTS
         if hasattr(instance, 'constraints'):
+            dumper.include_filter = None
             dumper.depth = 3
             data["constraints"] = dumper.dump(instance.constraints)
 
@@ -344,39 +627,9 @@ class BlObject(BlDatablock):
                 bone_groups[group.name] = dumper.dump(group)
             data['pose']['bone_groups'] = bone_groups
 
-        # CHILDS
-        if len(instance.children) > 0:
-            childs = []
-            for child in instance.children:
-                childs.append(child.name)
-
-            data["children"] = childs
-
         # VERTEx GROUP
         if len(instance.vertex_groups) > 0:
-            points_attr = 'vertices' if isinstance(
+            data['vertex_groups'] = dump_vertex_groups(instance)
-                instance.data, bpy.types.Mesh) else 'points'
-            vg_data = []
-            for vg in instance.vertex_groups:
-                vg_idx = vg.index
-                dumped_vg = {}
-                dumped_vg['name'] = vg.name
-
-                vertices = []
-
-                for i, v in enumerate(getattr(instance.data, points_attr)):
-                    for vg in v.groups:
-                        if vg.group == vg_idx:
-                            vertices.append({
-                                'index': i,
-                                'weight': vg.weight
-                            })
-
-                dumped_vg['vertices'] = vertices
-
-                vg_data.append(dumped_vg)
-
-            data['vertex_groups'] = vg_data
 
         #  SHAPE KEYS
         object_data = instance.data
@@ -406,6 +659,29 @@ class BlObject(BlDatablock):
                 key_blocks[key.name]['relative_key'] = key.relative_key.name
             data['shape_keys']['key_blocks'] = key_blocks
 
+        #  SKIN VERTICES
+        if hasattr(object_data, 'skin_vertices') and object_data.skin_vertices:
+            skin_vertices = list()
+            for skin_data in object_data.skin_vertices:
+                skin_vertices.append(
+                    np_dump_collection(skin_data.data, SKIN_DATA))
+            data['skin_vertices'] = skin_vertices
+
+        # CYCLE SETTINGS
+        if hasattr(instance, 'cycles_visibility'):
+            dumper.include_filter = [
+                'camera',
+                'diffuse',
+                'glossy',
+                'transmission',
+                'scatter',
+                'shadow',
+            ]
+            data['cycles_visibility'] = dumper.dump(instance.cycles_visibility)
+
+        # PHYSICS
+        data.update(dump_physics(instance))
+
         return data
 
     def _resolve_deps_implementation(self):
@@ -414,17 +690,23 @@ class BlObject(BlDatablock):
         # Avoid Empty case
         if self.instance.data:
             deps.append(self.instance.data)
-        if len(self.instance.children) > 0:
+
-            deps.extend(list(self.instance.children))
+        # Particle systems
+        for particle_slot in self.instance.particle_systems:
+            deps.append(particle_slot.settings)
 
         if self.is_library:
             deps.append(self.instance.library)
 
+        if self.instance.parent:
+            deps.append(self.instance.parent)
+
         if self.instance.instance_type == 'COLLECTION':
             # TODO: uuid based
             deps.append(self.instance.instance_collection)
 
         if self.instance.modifiers:
             deps.extend(find_textures_dependencies(self.instance.modifiers))
+            deps.extend(find_geometry_nodes_dependencies(self.instance.modifiers))
 
         return deps

multi_user/bl_types/bl_particle.py

@@ -0,0 +1,90 @@
+import bpy
+import mathutils
+
+from . import dump_anything
+from .bl_datablock import BlDatablock, get_datablock_from_uuid
+
+
+def dump_textures_slots(texture_slots: bpy.types.bpy_prop_collection) -> list:
+    """ Dump every texture slot collection as the form:
+        [(index, slot_texture_uuid, slot_texture_name), (), ...]
+    """
+    dumped_slots = []
+    for index, slot in enumerate(texture_slots):
+        if slot and slot.texture:
+            dumped_slots.append((index, slot.texture.uuid, slot.texture.name))
+
+    return dumped_slots
+
+
+def load_texture_slots(dumped_slots: list, target_slots: bpy.types.bpy_prop_collection):
+    """
+    """
+    for index, slot in enumerate(target_slots):
+        if slot:
+            target_slots.clear(index)
+
+    for index, slot_uuid, slot_name in dumped_slots:
+        target_slots.create(index).texture = get_datablock_from_uuid(
+            slot_uuid, slot_name
+        )
+
+IGNORED_ATTR = [
+    "is_embedded_data",
+    "is_evaluated",
+    "is_fluid",
+    "is_library_indirect",
+    "users"
+]
+
+class BlParticle(BlDatablock):
+    bl_id = "particles"
+    bl_class = bpy.types.ParticleSettings
+    bl_icon = "PARTICLES"
+    bl_check_common = False
+    bl_reload_parent = False
+
+    def _construct(self, data):
+        instance = bpy.data.particles.new(data["name"])
+        instance.uuid = self.uuid
+        return instance
+
+    def _load_implementation(self, data, target):
+        dump_anything.load(target, data)
+
+        dump_anything.load(target.effector_weights, data["effector_weights"])
+
+        # Force field
+        force_field_1 = data.get("force_field_1", None)
+        if force_field_1:
+            dump_anything.load(target.force_field_1, force_field_1)
+
+        force_field_2 = data.get("force_field_2", None)
+        if force_field_2:
+            dump_anything.load(target.force_field_2, force_field_2)
+
+        # Texture slots
+        load_texture_slots(data["texture_slots"], target.texture_slots)
+
+    def _dump_implementation(self, data, instance=None):
+        assert instance
+
+        dumper = dump_anything.Dumper()
+        dumper.depth = 1
+        dumper.exclude_filter = IGNORED_ATTR
+        data = dumper.dump(instance)
+
+        # Particle effectors
+        data["effector_weights"] = dumper.dump(instance.effector_weights)
+        if instance.force_field_1:
+            data["force_field_1"] = dumper.dump(instance.force_field_1)
+        if instance.force_field_2:
+            data["force_field_2"] = dumper.dump(instance.force_field_2)
+
+        # Texture slots
+        data["texture_slots"] = dump_textures_slots(instance.texture_slots)
+
+        return data
+
+    def _resolve_deps_implementation(self):
+        return [t.texture for t in self.instance.texture_slots if t and t.texture]

multi_user/bl_types/bl_scene.py

@@ -17,16 +17,19 @@
 
 
 import logging
+from pathlib import Path
 
 import bpy
 import mathutils
 from deepdiff import DeepDiff
 from replication.constants import DIFF_JSON, MODIFIED
 
+from ..utils import flush_history
 from .bl_collection import (dump_collection_children, dump_collection_objects,
                             load_collection_childrens, load_collection_objects,
                             resolve_collection_dependencies)
 from .bl_datablock import BlDatablock
+from .bl_file import get_filepath
 from .dump_anything import Dumper, Loader
 
 RENDER_SETTINGS = [
@@ -265,28 +268,116 @@ VIEW_SETTINGS = [
 ]
 
 
+def dump_sequence(sequence: bpy.types.Sequence) -> dict:
+    """ Dump a sequence to a dict
+
+        :arg sequence: sequence to dump
+        :type sequence: bpy.types.Sequence
+        :return dict:
+    """
+    dumper = Dumper()
+    dumper.exclude_filter = [
+        'lock',
+        'select',
+        'select_left_handle',
+        'select_right_handle',
+        'strobe'
+    ]
+    dumper.depth = 1
+    data = dumper.dump(sequence)
 
 
+    # TODO: Support multiple images
+    if sequence.type == 'IMAGE':
+        data['filenames'] = [e.filename for e in sequence.elements]
 
 
+    # Effect strip inputs
+    input_count = getattr(sequence, 'input_count', None)
+    if input_count:
+        for n in range(input_count):
+            input_name = f"input_{n+1}"
+            data[input_name] = getattr(sequence, input_name).name
+
+    return data
+
+
+def load_sequence(sequence_data: dict, sequence_editor: bpy.types.SequenceEditor):
+    """ Load sequence from dumped data
+
+        :arg sequence_data: sequence to dump
+        :type sequence_data:dict
+        :arg sequence_editor: root sequence editor
+        :type sequence_editor: bpy.types.SequenceEditor
+    """
+    strip_type = sequence_data.get('type')
+    strip_name = sequence_data.get('name')
+    strip_channel = sequence_data.get('channel')
+    strip_frame_start = sequence_data.get('frame_start')
+
+    sequence = sequence_editor.sequences_all.get(strip_name, None)
+
+    if sequence is None:
+        if strip_type == 'SCENE':
+            strip_scene = bpy.data.scenes.get(sequence_data.get('scene'))
+            sequence = sequence_editor.sequences.new_scene(strip_name,
+                                                        strip_scene,
+                                                        strip_channel,
+                                                        strip_frame_start)
+        elif strip_type == 'MOVIE':
+            filepath = get_filepath(Path(sequence_data['filepath']).name)
+            sequence = sequence_editor.sequences.new_movie(strip_name,
+                                                        filepath,
+                                                        strip_channel,
+                                                        strip_frame_start)
+        elif strip_type == 'SOUND':
+            filepath = bpy.data.sounds[sequence_data['sound']].filepath
+            sequence = sequence_editor.sequences.new_sound(strip_name,
+                                                        filepath,
+                                                        strip_channel,
+                                                        strip_frame_start)
+        elif strip_type == 'IMAGE':
+            images_name = sequence_data.get('filenames')
+            filepath = get_filepath(images_name[0])
+            sequence = sequence_editor.sequences.new_image(strip_name,
+                                                        filepath,
+                                                        strip_channel,
+                                                        strip_frame_start)
+            # load other images
+            if len(images_name)>1:
+                for img_idx in range(1,len(images_name)):
+                    sequence.elements.append((images_name[img_idx]))
+        else:
+            seq = {}
+
+            for i in range(sequence_data['input_count']):
+                seq[f"seq{i+1}"] = sequence_editor.sequences_all.get(sequence_data.get(f"input_{i+1}", None))
+
+            sequence = sequence_editor.sequences.new_effect(name=strip_name,
+                                                        type=strip_type,
+                                                        channel=strip_channel,
+                                                        frame_start=strip_frame_start,
+                                                        frame_end=sequence_data['frame_final_end'],
+                                                        **seq)
+
+    loader = Loader()
+    # TODO: Support filepath updates 
+    loader.exclure_filter = ['filepath', 'sound', 'filenames','fps']
+    loader.load(sequence, sequence_data)
+    sequence.select = False
+
 
 class BlScene(BlDatablock):
     bl_id = "scenes"
     bl_class = bpy.types.Scene
-    bl_delay_refresh = 1
-    bl_delay_apply = 1
-    bl_automatic_push = True
     bl_check_common = True
     bl_icon = 'SCENE_DATA'
     bl_reload_parent = False
 
-    def __init__(self, *args, **kwargs):
-        super().__init__(*args, **kwargs)
-
-        self.diff_method = DIFF_JSON
-
     def _construct(self, data):
         instance = bpy.data.scenes.new(data["name"])
+        instance.uuid = self.uuid
+
         return instance
 
     def _load_implementation(self, data, target):
@@ -328,6 +419,29 @@ class BlScene(BlDatablock):
                         'view_settings']['curve_mapping']['black_level']
                     target.view_settings.curve_mapping.update()
 
+        # Sequencer
+        sequences = data.get('sequences')
+        
+        if sequences:
+            # Create sequencer data
+            target.sequence_editor_create()
+            vse = target.sequence_editor
+
+            # Clear removed sequences
+            for seq in vse.sequences_all:
+                if seq.name not in sequences:
+                    vse.sequences.remove(seq)
+            # Load existing sequences
+            for seq_name, seq_data in sequences.items():
+                load_sequence(seq_data, vse)
+        # If the sequence is no longer used, clear it
+        elif target.sequence_editor and not sequences:
+            target.sequence_editor_clear()
+
+        # FIXME: Find a better way after the replication big refacotoring
+        # Keep other user from deleting collection object by flushing their history
+        flush_history()
+
     def _dump_implementation(self, data, instance=None):
         assert(instance)
 
@@ -386,10 +500,14 @@ class BlScene(BlDatablock):
                 data['view_settings']['curve_mapping']['curves'] = scene_dumper.dump(
                     instance.view_settings.curve_mapping.curves)
 
-        if instance.sequence_editor:
+        # Sequence
-            data['has_sequence'] = True
+        vse = instance.sequence_editor
-        else:
+        if vse:
-            data['has_sequence'] = False
+            dumped_sequences = {}
+            for seq in vse.sequences_all:
+                dumped_sequences[seq.name] = dump_sequence(seq)
+            data['sequences'] = dumped_sequences
+
 
         return data
 
@@ -408,9 +526,18 @@ class BlScene(BlDatablock):
             deps.append(self.instance.grease_pencil)
 
         # Sequences
-        #     deps.extend(list(self.instance.sequence_editor.sequences_all))
+        vse = self.instance.sequence_editor
-        if self.instance.sequence_editor:
+        if vse:
-            deps.append(self.instance.sequence_editor)
+            for sequence in vse.sequences_all:
+                if sequence.type == 'MOVIE' and sequence.filepath:
+                    deps.append(Path(bpy.path.abspath(sequence.filepath)))
+                elif sequence.type == 'SOUND' and sequence.sound:
+                    deps.append(sequence.sound)
+                elif sequence.type == 'IMAGE':
+                    for elem in sequence.elements:
+                        sequence.append(
+                            Path(bpy.path.abspath(sequence.directory),
+                            elem.filename))
 
         return deps
 

multi_user/bl_types/bl_sequencer.py

@@ -1,198 +0,0 @@
-# ##### BEGIN GPL LICENSE BLOCK #####
-#
-#   This program is free software: you can redistribute it and/or modify
-#   it under the terms of the GNU General Public License as published by
-#   the Free Software Foundation, either version 3 of the License, or
-#   (at your option) any later version.
-#
-#   This program is distributed in the hope that it will be useful,
-#   but WITHOUT ANY WARRANTY; without even the implied warranty of
-#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-#   GNU General Public License for more details.
-#
-#   You should have received a copy of the GNU General Public License
-#   along with this program.  If not, see <https://www.gnu.org/licenses/>.
-#
-# ##### END GPL LICENSE BLOCK #####
-
-
-import bpy
-import mathutils
-from pathlib import Path
-import logging
-
-from .bl_file import get_filepath
-from .dump_anything import Loader, Dumper
-from .bl_datablock import BlDatablock, get_datablock_from_uuid
-
-def dump_sequence(sequence: bpy.types.Sequence) -> dict:
-    """ Dump a sequence to a dict
-
-        :arg sequence: sequence to dump
-        :type sequence: bpy.types.Sequence
-        :return dict:
-    """
-    dumper = Dumper()
-    dumper.exclude_filter = [
-        'lock',
-        'select',
-        'select_left_handle',
-        'select_right_handle',
-        'strobe'
-    ]
-    dumper.depth = 1
-    data = dumper.dump(sequence)
-
-
-    # TODO: Support multiple images
-    if sequence.type == 'IMAGE':
-        data['filenames'] = [e.filename for e in sequence.elements]
-
-
-    # Effect strip inputs
-    input_count = getattr(sequence, 'input_count', None)
-    if input_count:
-        for n in range(input_count):
-            input_name = f"input_{n+1}"
-            data[input_name] = getattr(sequence, input_name).name
-
-    return data
-
-
-def load_sequence(sequence_data: dict, sequence_editor: bpy.types.SequenceEditor):
-    """ Load sequence from dumped data
-
-        :arg sequence_data: sequence to dump
-        :type sequence_data:dict
-        :arg sequence_editor: root sequence editor
-        :type sequence_editor: bpy.types.SequenceEditor
-    """
-    strip_type = sequence_data.get('type')
-    strip_name = sequence_data.get('name')
-    strip_channel = sequence_data.get('channel')
-    strip_frame_start = sequence_data.get('frame_start')
-
-    sequence = sequence_editor.sequences_all.get(strip_name, None)
-
-    if sequence is None:
-        if strip_type == 'SCENE':
-            strip_scene = bpy.data.scenes.get(sequence_data.get('scene'))
-            sequence = sequence_editor.sequences.new_scene(strip_name,
-                                                        strip_scene,
-                                                        strip_channel,
-                                                        strip_frame_start)
-        elif strip_type == 'MOVIE':
-            filepath = get_filepath(Path(sequence_data['filepath']).name)
-            sequence = sequence_editor.sequences.new_movie(strip_name,
-                                                        filepath,
-                                                        strip_channel,
-                                                        strip_frame_start)
-        elif strip_type == 'SOUND':
-            filepath = bpy.data.sounds[sequence_data['sound']].filepath
-            sequence = sequence_editor.sequences.new_sound(strip_name,
-                                                        filepath,
-                                                        strip_channel,
-                                                        strip_frame_start)
-        elif strip_type == 'IMAGE':
-            images_name = sequence_data.get('filenames')
-            filepath = get_filepath(images_name[0])
-            sequence = sequence_editor.sequences.new_image(strip_name,
-                                                        filepath,
-                                                        strip_channel,
-                                                        strip_frame_start)
-            # load other images
-            if len(images_name)>1:
-                for img_idx in range(1,len(images_name)):
-                    sequence.elements.append((images_name[img_idx]))
-        else:
-            seq = {}
-
-            for i in range(sequence_data['input_count']):
-                seq[f"seq{i+1}"] = sequence_editor.sequences_all.get(sequence_data.get(f"input_{i+1}", None))
-
-            sequence = sequence_editor.sequences.new_effect(name=strip_name,
-                                                        type=strip_type,
-                                                        channel=strip_channel,
-                                                        frame_start=strip_frame_start,
-                                                        frame_end=sequence_data['frame_final_end'],
-                                                        **seq)
-
-    loader = Loader()
-    loader.load(sequence, sequence_data)
-    sequence.select = False
-
-
-class BlSequencer(BlDatablock):
-    bl_id = "scenes"
-    bl_class = bpy.types.SequenceEditor
-    bl_delay_refresh = 1
-    bl_delay_apply = 1
-    bl_automatic_push = True
-    bl_check_common = True
-    bl_icon = 'SEQUENCE'
-    bl_reload_parent = False
-
-    def _construct(self, data):
-        # Get the scene
-        scene_id = data.get('name')
-        scene = bpy.data.scenes.get(scene_id, None)
-
-        # Create sequencer data
-        scene.sequence_editor_clear()
-        scene.sequence_editor_create()
-
-        return scene.sequence_editor
-
-    def resolve(self):
-        scene = bpy.data.scenes.get(self.data['name'], None)
-        if scene:
-            if scene.sequence_editor is None:
-                self.instance = self._construct(self.data)
-            else:
-                self.instance = scene.sequence_editor
-        else:
-            logging.warning("Sequencer editor scene not found")
-
-    def _load_implementation(self, data, target):
-        loader = Loader()
-        # Sequencer
-        sequences = data.get('sequences')
-        if sequences:
-            for seq in target.sequences_all:
-                if seq.name not in sequences:
-                    target.sequences.remove(seq)
-            for seq_name, seq_data in sequences.items():
-                load_sequence(seq_data, target)
-
-    def _dump_implementation(self, data, instance=None):
-        assert(instance)
-        sequence_dumper = Dumper()
-        sequence_dumper.depth = 1
-        sequence_dumper.include_filter = [
-            'proxy_storage',
-        ]
-        data = {}#sequence_dumper.dump(instance)
-        # Sequencer
-        sequences = {}
-
-        for seq in instance.sequences_all:
-            sequences[seq.name] = dump_sequence(seq)
-
-        data['sequences'] = sequences
-        data['name'] = instance.id_data.name
-
-        return data
-
-
-    def _resolve_deps_implementation(self):
-        deps = []
-
-        for seq in self.instance.sequences_all:
-            if seq.type == 'MOVIE' and seq.filepath:
-                deps.append(Path(bpy.path.abspath(seq.filepath)))
-            elif seq.type == 'SOUND' and seq.sound:
-                deps.append(seq.sound)
-            elif seq.type == 'IMAGE':
-                for e in seq.elements:
-                    deps.append(Path(bpy.path.abspath(seq.directory), e.filename))
-        return deps

multi_user/bl_types/bl_sound.py

@@ -30,9 +30,6 @@ from .dump_anything import Dumper, Loader
 class BlSound(BlDatablock):
     bl_id = "sounds"
     bl_class = bpy.types.Sound
-    bl_delay_refresh = 1
-    bl_delay_apply = 1
-    bl_automatic_push = True
     bl_check_common = False
     bl_icon = 'SOUND'
     bl_reload_parent = False

multi_user/bl_types/bl_speaker.py

@@ -26,9 +26,6 @@ from .bl_datablock import BlDatablock
 class BlSpeaker(BlDatablock):
     bl_id = "speakers"
     bl_class = bpy.types.Speaker
-    bl_delay_refresh = 1
-    bl_delay_apply = 1
-    bl_automatic_push = True
     bl_check_common = False
     bl_icon = 'SPEAKER'
     bl_reload_parent = False

multi_user/bl_types/bl_texture.py

@@ -26,9 +26,6 @@ from .bl_datablock import BlDatablock
 class BlTexture(BlDatablock):
     bl_id = "textures"
     bl_class = bpy.types.Texture
-    bl_delay_refresh = 1
-    bl_delay_apply = 1
-    bl_automatic_push = True
     bl_check_common = False
     bl_icon = 'TEXTURE'
     bl_reload_parent = False

multi_user/bl_types/bl_volume.py

@@ -22,14 +22,11 @@ from pathlib import Path
 
 from .dump_anything import Loader, Dumper
 from .bl_datablock import BlDatablock, get_datablock_from_uuid
-
+from .bl_material import dump_materials_slots, load_materials_slots
 
 class BlVolume(BlDatablock):
     bl_id = "volumes"
     bl_class = bpy.types.Volume
-    bl_delay_refresh = 1
-    bl_delay_apply = 1
-    bl_automatic_push = True
     bl_check_common = False
     bl_icon = 'VOLUME_DATA'
     bl_reload_parent = False
@@ -40,19 +37,9 @@ class BlVolume(BlDatablock):
         loader.load(target.display, data['display'])
 
         # MATERIAL SLOTS
-        target.materials.clear()
+        src_materials = data.get('materials', None)
-
+        if src_materials:
-        for mat_uuid, mat_name in data["material_list"]:
+            load_materials_slots(src_materials, target.materials)
-            mat_ref = None
-            if mat_uuid is not None:
-                mat_ref = get_datablock_from_uuid(mat_uuid, None)
-            else:
-                mat_ref = bpy.data.materials.get(mat_name, None)
-
-            if mat_ref is None:
-                raise Exception("Material doesn't exist")
-
-            target.materials.append(mat_ref)
 
     def _construct(self, data):
         return bpy.data.volumes.new(data["name"])
@@ -78,7 +65,7 @@ class BlVolume(BlDatablock):
         data['display'] = dumper.dump(instance.display)
 
          # Fix material index
-        data['material_list'] = [(m.uuid, m.name) for m in instance.materials if m]
+        data['materials'] = dump_materials_slots(instance.materials)
 
         return data
 

multi_user/bl_types/bl_world.py

@@ -21,17 +21,14 @@ import mathutils
 
 from .dump_anything import Loader, Dumper
 from .bl_datablock import BlDatablock
-from .bl_material import (load_shader_node_tree,
+from .bl_material import (load_node_tree,
-                          dump_shader_node_tree,
+                          dump_node_tree,
                           get_node_tree_dependencies)
 
 
 class BlWorld(BlDatablock):
     bl_id = "worlds"
     bl_class = bpy.types.World
-    bl_delay_refresh = 1
-    bl_delay_apply = 1
-    bl_automatic_push = True
     bl_check_common = True
     bl_icon = 'WORLD_DATA'
     bl_reload_parent = False
@@ -47,7 +44,7 @@ class BlWorld(BlDatablock):
             if target.node_tree is None:
                 target.use_nodes = True
 
-            load_shader_node_tree(data['node_tree'], target.node_tree)
+            load_node_tree(data['node_tree'], target.node_tree)
 
     def _dump_implementation(self, data, instance=None):
         assert(instance)
@@ -61,7 +58,7 @@ class BlWorld(BlDatablock):
         ]
         data = world_dumper.dump(instance)
         if instance.use_nodes:
-            data['node_tree'] = dump_shader_node_tree(instance.node_tree)
+            data['node_tree'] = dump_node_tree(instance.node_tree)
 
         return data
 

multi_user/bl_types/dump_anything.py

@@ -465,6 +465,7 @@ class Loader:
         self.type_subset = self.match_subset_all
         self.occlude_read_only = False
         self.order = ['*']
+        self.exclure_filter = []
 
     def load(self, dst_data, src_dumped_data):
         self._load_any(
@@ -475,7 +476,8 @@ class Loader:
 
     def _load_any(self, any, dump):
         for filter_function, load_function in self.type_subset:
-            if filter_function(any):
+            if filter_function(any) and \
+                any.sub_element_name not in self.exclure_filter:
                 load_function(any, dump)
                 return
 
@@ -514,7 +516,7 @@ class Loader:
             T.ColorRampElement: DESTRUCTOR_REMOVE,
             T.Modifier: DESTRUCTOR_CLEAR,
             T.GpencilModifier: DESTRUCTOR_CLEAR,
-            T.Constraint: CONSTRUCTOR_NEW,
+            T.Constraint: DESTRUCTOR_REMOVE,
         }
         element_type = element.bl_rna_property.fixed_type
 
@@ -529,7 +531,13 @@ class Loader:
         if destructor:
             if destructor == DESTRUCTOR_REMOVE:
                 collection = element.read()
-                for i in range(len(collection)-1):
+                elems_to_remove = len(collection)
+
+                # Color ramp doesn't allow to remove all elements
+                if type(element_type) == T.ColorRampElement:
+                    elems_to_remove -= 1
+
+                for i in range(elems_to_remove):
                     collection.remove(collection[0])
             else:
                 getattr(element.read(), DESTRUCTOR_CLEAR)()
@@ -588,6 +596,8 @@ class Loader:
             instance.write(bpy.data.textures.get(dump))
         elif isinstance(rna_property_type, T.ColorRamp):
             self._load_default(instance, dump)
+        elif isinstance(rna_property_type, T.NodeTree):
+            instance.write(bpy.data.node_groups.get(dump))
         elif isinstance(rna_property_type, T.Object):
             instance.write(bpy.data.objects.get(dump))
         elif isinstance(rna_property_type, T.Mesh):
@@ -600,6 +610,8 @@ class Loader:
             instance.write(bpy.data.fonts.get(dump))
         elif isinstance(rna_property_type, T.Sound):
             instance.write(bpy.data.sounds.get(dump))
+        # elif isinstance(rna_property_type, T.ParticleSettings):
+        #     instance.write(bpy.data.particles.get(dump))
 
     def _load_matrix(self, matrix, dump):
         matrix.write(mathutils.Matrix(dump))

multi_user/operators.py

@@ -17,6 +17,8 @@
 
 
 import asyncio
+import copy
+import gzip
 import logging
 import os
 import queue
@@ -25,27 +27,35 @@ import shutil
 import string
 import sys
 import time
+from datetime import datetime
 from operator import itemgetter
 from pathlib import Path
 from queue import Queue
+from time import gmtime, strftime
+
+try:
+    import _pickle as pickle
+except ImportError:
+    import pickle
 
 import bpy
 import mathutils
 from bpy.app.handlers import persistent
-from replication.constants import (FETCHED, RP_COMMON, STATE_ACTIVE,
+from bpy_extras.io_utils import ExportHelper, ImportHelper
+from replication.constants import (COMMITED, FETCHED, RP_COMMON, STATE_ACTIVE,
                                    STATE_INITIAL, STATE_SYNCING, UP)
 from replication.data import ReplicatedDataFactory
-from replication.exception import NonAuthorizedOperationError
+from replication.exception import NonAuthorizedOperationError, ContextError
 from replication.interface import session
 
-from . import bl_types, delayable, environment, ui, utils
+from . import bl_types, environment, timers, ui, utils
 from .presence import SessionStatusWidget, renderer, view3d_find
+from .timers import registry
 
 background_execution_queue = Queue()
 deleyables = []
 stop_modal_executor = False
 
-
 def session_callback(name):
     """ Session callback wrapper
 
@@ -64,30 +74,42 @@ def session_callback(name):
 def initialize_session():
     """Session connection init hander 
     """
+    logging.info("Intializing the scene")
     settings = utils.get_preferences()
     runtime_settings = bpy.context.window_manager.session
 
     # Step 1: Constrect nodes
+    logging.info("Constructing nodes")
     for node in session._graph.list_ordered():
-        node_ref = session.get(node)
+        node_ref = session.get(uuid=node)
-        if node_ref.state == FETCHED:
+        if node_ref is None:
+            logging.error(f"Can't construct node {node}")
+        elif node_ref.state == FETCHED:
             node_ref.resolve()
     
     # Step 2: Load nodes
+    logging.info("Loading nodes")
     for node in session._graph.list_ordered():
-        node_ref = session.get(node)
+        node_ref = session.get(uuid=node)
-        if node_ref.state == FETCHED:
+
+        if node_ref is None:
+            logging.error(f"Can't load node {node}")
+        elif node_ref.state == FETCHED:
             node_ref.apply()
 
+    logging.info("Registering timers")
     # Step 4: Register blender timers
     for d in deleyables:
         d.register()
 
-    if settings.update_method == 'DEPSGRAPH':
-        bpy.app.handlers.depsgraph_update_post.append(depsgraph_evaluation)
-
     bpy.ops.session.apply_armature_operator('INVOKE_DEFAULT')
 
+    # Step 5: Clearing history
+    utils.flush_history()
+
+    # Step 6: Launch deps graph update handling
+    bpy.app.handlers.depsgraph_update_post.append(depsgraph_evaluation)
+
 
 @session_callback('on_exit')
 def on_connection_end(reason="none"):
@@ -106,9 +128,8 @@ def on_connection_end(reason="none"):
 
     stop_modal_executor = True
 
-    if settings.update_method == 'DEPSGRAPH':
+    if depsgraph_evaluation in bpy.app.handlers.depsgraph_update_post:
-        bpy.app.handlers.depsgraph_update_post.remove(
+        bpy.app.handlers.depsgraph_update_post.remove(depsgraph_evaluation)
-            depsgraph_evaluation)
 
     # Step 3: remove file handled
     logger = logging.getLogger()
@@ -138,7 +159,7 @@ class SessionStartOperator(bpy.types.Operator):
         runtime_settings = context.window_manager.session
         users = bpy.data.window_managers['WinMan'].online_users
         admin_pass = runtime_settings.password
-        use_extern_update = settings.update_method == 'DEPSGRAPH'
+
         users.clear()
         deleyables.clear()
 
@@ -149,9 +170,10 @@ class SessionStartOperator(bpy.types.Operator):
                 datefmt='%H:%M:%S'
             )
 
+            start_time = datetime.now().strftime('%Y_%m_%d_%H-%M-%S')
             log_directory = os.path.join(
                 settings.cache_directory,
-                "multiuser_client.log")
+                f"multiuser_{start_time}.log")
 
             os.makedirs(settings.cache_directory, exist_ok=True)
 
@@ -186,17 +208,8 @@ class SessionStartOperator(bpy.types.Operator):
             bpy_factory.register_type(
                 type_module_class.bl_class,
                 type_module_class,
-                timer=type_local_config.bl_delay_refresh*1000,
-                automatic=type_local_config.auto_push,
                 check_common=type_module_class.bl_check_common)
 
-            if settings.update_method == 'DEFAULT':
-                if type_local_config.bl_delay_apply > 0:
-                    deleyables.append(
-                        delayable.ApplyTimer(
-                            timout=type_local_config.bl_delay_apply,
-                            target_type=type_module_class))
-
         if bpy.app.version[1] >= 91:
             python_binary_path = sys.executable
         else:
@@ -205,11 +218,7 @@ class SessionStartOperator(bpy.types.Operator):
         session.configure(
             factory=bpy_factory,
             python_path=python_binary_path,
-            external_update_handling=use_extern_update)
+            external_update_handling=True)
-
-        if settings.update_method == 'DEPSGRAPH':
-            deleyables.append(delayable.ApplyTimer(
-                settings.depsgraph_update_rate/1000))
 
         # Host a session
         if self.host:
@@ -259,12 +268,16 @@ class SessionStartOperator(bpy.types.Operator):
                 logging.error(str(e))
 
         # Background client updates service
-        deleyables.append(delayable.ClientUpdate())
+        deleyables.append(timers.ClientUpdate())
-        deleyables.append(delayable.DynamicRightSelectTimer())
+        deleyables.append(timers.DynamicRightSelectTimer())
-
+        deleyables.append(timers.ApplyTimer(timeout=settings.depsgraph_update_rate))
-        session_update = delayable.SessionStatusUpdate()
+        # deleyables.append(timers.PushTimer(
-        session_user_sync = delayable.SessionUserSync()
+        #     queue=stagging,
-        session_background_executor = delayable.MainThreadExecutor(
+        #     timeout=settings.depsgraph_update_rate
+        #     ))
+        session_update = timers.SessionStatusUpdate()
+        session_user_sync = timers.SessionUserSync()
+        session_background_executor = timers.MainThreadExecutor(
             execution_queue=background_execution_queue)
 
         session_update.register()
@@ -586,9 +599,14 @@ class SessionApply(bpy.types.Operator):
     def execute(self, context):
         logging.debug(f"Running apply on {self.target}")
         try:
+            node_ref = session.get(uuid=self.target)
             session.apply(self.target,
                         force=True,
                         force_dependencies=self.reset_dependencies)
+            if node_ref.bl_reload_parent:
+                for parent in session._graph.find_parents(self.target):
+                    logging.debug(f"Refresh parent {parent}")
+                    session.apply(parent, force=True)
         except Exception as e:
             self.report({'ERROR'}, repr(e))
             return {"CANCELED"}    
@@ -688,6 +706,31 @@ class SessionClearCache(bpy.types.Operator):
         row = self.layout
         row.label(text=f" Do you really want to remove local cache ? ")
 
+class SessionPurgeOperator(bpy.types.Operator):
+    "Remove node with lost references"
+    bl_idname = "session.purge"
+    bl_label = "Purge session data"
+
+    @classmethod
+    def poll(cls, context):
+        return True
+
+    def execute(self, context):
+        try:
+            sanitize_deps_graph(remove_nodes=True)
+        except Exception as e:
+            self.report({'ERROR'}, repr(e))
+
+        return {"FINISHED"}
+
+    def invoke(self, context, event):
+        return context.window_manager.invoke_props_dialog(self)
+
+    def draw(self, context):
+        row = self.layout
+        row.label(text=f" Do you really want to remove local cache ? ")
+
+
 class SessionNotifyOperator(bpy.types.Operator):
     """Dialog only operator"""
     bl_idname = "session.notify"
@@ -712,6 +755,150 @@ class SessionNotifyOperator(bpy.types.Operator):
         return context.window_manager.invoke_props_dialog(self)
 
 
+class SessionSaveBackupOperator(bpy.types.Operator, ExportHelper):
+    bl_idname = "session.save"
+    bl_label = "Save session data"
+    bl_description = "Save a snapshot of the collaborative session"
+
+    # ExportHelper mixin class uses this
+    filename_ext = ".db"
+
+    filter_glob: bpy.props.StringProperty(
+        default="*.db",
+        options={'HIDDEN'},
+        maxlen=255,  # Max internal buffer length, longer would be clamped.
+    )
+
+    enable_autosave: bpy.props.BoolProperty(
+        name="Auto-save",
+        description="Enable session auto-save",
+        default=True,
+    )
+    save_interval: bpy.props.FloatProperty(
+        name="Auto save interval",
+        description="auto-save interval (seconds)",
+        default=10,
+    )
+
+    def execute(self, context):
+        if self.enable_autosave:
+            recorder = timers.SessionBackupTimer(
+                filepath=self.filepath,
+                timeout=self.save_interval)
+            recorder.register()
+            deleyables.append(recorder)
+        else:
+            session.save(self.filepath)
+
+        return {'FINISHED'}
+
+    @classmethod
+    def poll(cls, context):
+        return session.state['STATE'] == STATE_ACTIVE
+
+class SessionStopAutoSaveOperator(bpy.types.Operator):
+    bl_idname = "session.cancel_autosave"
+    bl_label = "Cancel auto-save"
+    bl_description = "Cancel session auto-save"
+
+    @classmethod
+    def poll(cls, context):
+        return (session.state['STATE'] == STATE_ACTIVE and 'SessionBackupTimer' in registry)
+
+    def execute(self, context):
+        autosave_timer = registry.get('SessionBackupTimer')
+        autosave_timer.unregister()
+
+        return {'FINISHED'}
+
+
+class SessionLoadSaveOperator(bpy.types.Operator, ImportHelper):
+    bl_idname = "session.load"
+    bl_label = "Load session save"
+    bl_description = "Load a Multi-user session save"
+    bl_options = {'REGISTER', 'UNDO'}
+
+    # ExportHelper mixin class uses this
+    filename_ext = ".db"
+
+    filter_glob: bpy.props.StringProperty(
+        default="*.db",
+        options={'HIDDEN'},
+        maxlen=255,  # Max internal buffer length, longer would be clamped.
+    )
+
+    def execute(self, context):
+        from replication.graph import ReplicationGraph
+
+        # TODO: add filechecks
+
+        try:
+            f = gzip.open(self.filepath, "rb")
+            db = pickle.load(f)
+        except OSError as e:
+            f = open(self.filepath, "rb")
+            db = pickle.load(f)
+        
+        if db:
+            logging.info(f"Reading {self.filepath}")
+            nodes = db.get("nodes")
+
+            logging.info(f"{len(nodes)} Nodes to load")
+
+            
+
+            # init the factory with supported types
+            bpy_factory = ReplicatedDataFactory()
+            for type in bl_types.types_to_register():
+                type_module = getattr(bl_types, type)
+                name = [e.capitalize() for e in type.split('_')[1:]]
+                type_impl_name = 'Bl'+''.join(name)
+                type_module_class = getattr(type_module, type_impl_name)
+
+
+                bpy_factory.register_type(
+                    type_module_class.bl_class,
+                    type_module_class)
+            
+            graph = ReplicationGraph()
+
+            for node, node_data in nodes:
+                node_type = node_data.get('str_type')
+
+                impl = bpy_factory.get_implementation_from_net(node_type)
+
+                if impl:
+                    logging.info(f"Loading  {node}")
+                    instance = impl(owner=node_data['owner'],
+                                    uuid=node,
+                                    dependencies=node_data['dependencies'],
+                                    data=node_data['data'])
+                    instance.store(graph)
+                    instance.state = FETCHED
+            
+            logging.info("Graph succefully loaded")
+
+            utils.clean_scene()
+
+            # Step 1: Construct nodes
+            for node in graph.list_ordered():
+                graph[node].resolve()
+
+            # Step 2: Load nodes
+            for node in graph.list_ordered():
+                graph[node].apply()
+
+
+        return {'FINISHED'}
+
+    @classmethod
+    def poll(cls, context):
+        return True
+
+def menu_func_import(self, context):
+    self.layout.operator(SessionLoadSaveOperator.bl_idname, text='Multi-user session snapshot (.db)')
+
+
 classes = (
     SessionStartOperator,
     SessionStopOperator,
@@ -726,21 +913,51 @@ classes = (
     SessionInitOperator,
     SessionClearCache,
     SessionNotifyOperator,
+    SessionSaveBackupOperator,
+    SessionLoadSaveOperator,
+    SessionStopAutoSaveOperator,
+    SessionPurgeOperator,
 )
 
+def update_external_dependencies():
+    nodes_ids = session.list(filter=bl_types.bl_file.BlFile)
+    for node_id in nodes_ids:
+        node = session.get(node_id)
+        if node and node.owner in [session.id, RP_COMMON] \
+                and node.has_changed():
+            session.commit(node_id)
+            session.push(node_id, check_data=False)
+
+def sanitize_deps_graph(remove_nodes: bool = False):
+    """ Cleanup the replication graph
+    """
+    if session and session.state['STATE'] == STATE_ACTIVE:
+        start = utils.current_milli_time()
+        rm_cpt = 0
+        for node_key in session.list():
+            node = session.get(node_key)
+            if node is None \
+                    or (node.state == UP and not node.resolve(construct=False)):
+                if remove_nodes:
+                    try:
+                        session.remove(node.uuid, remove_dependencies=False)
+                        logging.info(f"Removing {node.uuid}")
+                        rm_cpt += 1
+                    except NonAuthorizedOperationError:
+                        continue
+        logging.info(f"Sanitize took { utils.current_milli_time()-start} ms")
+
 
 @persistent
-def sanitize_deps_graph(dummy):
+def resolve_deps_graph(dummy):
-    """sanitize deps graph
+    """Resolve deps graph
 
     Temporary solution to resolve each node pointers after a Undo.
     A future solution should be to avoid storing dataclock reference...
 
     """
     if session and session.state['STATE'] == STATE_ACTIVE:
-        for node_key in session.list():
+        sanitize_deps_graph(remove_nodes=True)
-            session.get(node_key).resolve()
-
 
 @persistent
 def load_pre_handler(dummy):
@@ -764,41 +981,53 @@ def depsgraph_evaluation(scene):
         dependency_updates = [u for u in blender_depsgraph.updates]
         settings = utils.get_preferences()
 
-        # NOTE: maybe we don't need to check each update but only the first
+        update_external_dependencies()
 
+        # NOTE: maybe we don't need to check each update but only the first
         for update in reversed(dependency_updates):
             # Is the object tracked ?
             if update.id.uuid:
                 # Retrieve local version
-                node = session.get(update.id.uuid)
+                node = session.get(uuid=update.id.uuid)
                 
                 # Check our right on this update:
                 #   - if its ours or ( under common and diff), launch the
                 # update process
-                #   - if its to someone else, ignore the update (go deeper ?)
+                #   - if its to someone else, ignore the update
-                if node and node.owner in [session.id, RP_COMMON] and node.state == UP:
+                if node and (node.owner == session.id or node.bl_check_common):
-                    # Avoid slow geometry update
+                    if node.state == UP:
-                    if 'EDIT' in context.mode and \
+                        try:
-                            not settings.sync_flags.sync_during_editmode:
+                            if node.has_changed():
-                        break
+                                session.commit(node.uuid)
-
+                                session.push(node.uuid, check_data=False)
-                    session.stash(node.uuid)
+                        except ReferenceError:
+                            logging.debug(f"Reference error {node.uuid}")
+                            if not node.is_valid():
+                                session.remove(node.uuid)
+                        except ContextError as e:
+                            logging.debug(e) 
+                        except Exception as e:
+                            logging.error(e)
                 else:
-                    # Distant update
                     continue
-            # else:
+            # A new scene is created 
-            #     # New items !
+            elif isinstance(update.id, bpy.types.Scene):
-            #     logger.error("UPDATE: ADD")
+                ref = session.get(reference=update.id)
-
+                if ref:
-
+                    ref.resolve()
+                else:
+                    scn_uuid = session.add(update.id)
+                    session.commit(scn_uuid)
+                    session.push(scn_uuid, check_data=False)
 def register():
     from bpy.utils import register_class
 
     for cls in classes: 
         register_class(cls)
 
-    bpy.app.handlers.undo_post.append(sanitize_deps_graph)
+
-    bpy.app.handlers.redo_post.append(sanitize_deps_graph)
+    bpy.app.handlers.undo_post.append(resolve_deps_graph)
+    bpy.app.handlers.redo_post.append(resolve_deps_graph)
 
     bpy.app.handlers.load_pre.append(load_pre_handler)
     bpy.app.handlers.frame_change_pre.append(update_client_frame)
@@ -812,8 +1041,8 @@ def unregister():
     for cls in reversed(classes):
         unregister_class(cls)
 
-    bpy.app.handlers.undo_post.remove(sanitize_deps_graph)
+    bpy.app.handlers.undo_post.remove(resolve_deps_graph)
-    bpy.app.handlers.redo_post.remove(sanitize_deps_graph)
+    bpy.app.handlers.redo_post.remove(resolve_deps_graph)
 
     bpy.app.handlers.load_pre.remove(load_pre_handler)
     bpy.app.handlers.frame_change_pre.remove(update_client_frame)

multi_user/preferences.py

@@ -97,8 +97,6 @@ def get_log_level(self):
 class ReplicatedDatablock(bpy.types.PropertyGroup):
     type_name: bpy.props.StringProperty()
     bl_name: bpy.props.StringProperty()
-    bl_delay_refresh: bpy.props.FloatProperty()
-    bl_delay_apply: bpy.props.FloatProperty()
     use_as_filter: bpy.props.BoolProperty(default=True)
     auto_push: bpy.props.BoolProperty(default=True)
     icon: bpy.props.StringProperty()
@@ -197,22 +195,13 @@ class SessionPrefs(bpy.types.AddonPreferences):
     connection_timeout: bpy.props.IntProperty(
         name='connection timeout',
         description='connection timeout before disconnection',
-        default=1000
+        default=5000
-    )
-    update_method: bpy.props.EnumProperty(
-        name='update method',
-        description='replication update method',
-        items=[
-            ('DEFAULT', "Default", "Default: Use threads to monitor databloc changes"),
-            ('DEPSGRAPH', "Depsgraph",
-             "Experimental: Use the blender dependency graph to trigger updates"),
-        ],
     )
     # Replication update settings
-    depsgraph_update_rate: bpy.props.IntProperty(
+    depsgraph_update_rate: bpy.props.FloatProperty(
-        name='depsgraph update rate',
+        name='depsgraph update rate (s)',
-        description='Dependency graph uppdate rate (milliseconds)',
+        description='Dependency graph uppdate rate (s)',
-        default=1000
+        default=1
     )
     clear_memory_filecache: bpy.props.BoolProperty(
         name="Clear memory filecache",
@@ -282,11 +271,6 @@ class SessionPrefs(bpy.types.AddonPreferences):
         description="Rights",
         default=False
     )
-    conf_session_timing_expanded: bpy.props.BoolProperty(
-        name="timings",
-        description="timings",
-        default=False
-    )
     conf_session_cache_expanded: bpy.props.BoolProperty(
         name="Cache",
         description="cache",
@@ -390,28 +374,7 @@ class SessionPrefs(bpy.types.AddonPreferences):
                 row = box.row()
                 row.label(text="Init the session from:")
                 row.prop(self, "init_method", text="")
-                row = box.row()
-                row.label(text="Update method:")
-                row.prop(self, "update_method", text="")
 
-                table = box.box()
-                table.row().prop(
-                    self, "conf_session_timing_expanded", text="Refresh rates",
-                    icon=get_expanded_icon(self.conf_session_timing_expanded),
-                    emboss=False)
-
-                if self.conf_session_timing_expanded:
-                    line = table.row()
-                    line.label(text=" ")
-                    line.separator()
-                    line.label(text="refresh (sec)")
-                    line.label(text="apply (sec)")
-
-                    for item in self.supported_datablocks:
-                        line = table.row(align=True)
-                        line.label(text="", icon=item.icon)
-                        line.prop(item, "bl_delay_refresh", text="")
-                        line.prop(item, "bl_delay_apply", text="")
             # HOST SETTINGS
             box = grid.box()
             box.prop(
@@ -467,11 +430,8 @@ class SessionPrefs(bpy.types.AddonPreferences):
             type_module_class = getattr(type_module, type_impl_name)
             new_db.name = type_impl_name
             new_db.type_name = type_impl_name
-            new_db.bl_delay_refresh = type_module_class.bl_delay_refresh
-            new_db.bl_delay_apply = type_module_class.bl_delay_apply
             new_db.use_as_filter = True
             new_db.icon = type_module_class.bl_icon
-            new_db.auto_push = type_module_class.bl_automatic_push
             new_db.bl_name = type_module_class.bl_id
 
 

multi_user/timers.py

@@ -16,68 +16,48 @@
 # ##### END GPL LICENSE BLOCK #####
 
 import logging
-
+import sys
+import traceback
 import bpy
-
+from replication.constants import (FETCHED, RP_COMMON, STATE_ACTIVE,
-from . import utils
+                                   STATE_INITIAL, STATE_LOBBY, STATE_QUITTING,
-from .presence import (renderer,
+                                   STATE_SRV_SYNC, STATE_SYNCING, UP)
-                       UserFrustumWidget,
+from replication.exception import NonAuthorizedOperationError, ContextError
-                       UserNameWidget,
-                       UserSelectionWidget,
-                       refresh_3d_view,
-                       generate_user_camera,
-                       get_view_matrix,
-                       refresh_sidebar_view)
-from . import  operators
-from replication.constants import (FETCHED,
-                                   UP,
-                                   RP_COMMON,
-                                   STATE_INITIAL,
-                                   STATE_QUITTING,
-                                   STATE_ACTIVE,
-                                   STATE_SYNCING,
-                                   STATE_LOBBY,
-                                   STATE_SRV_SYNC)
-
 from replication.interface import session
-from replication.exception import NonAuthorizedOperationError
 
+from . import operators, utils
+from .presence import (UserFrustumWidget, UserNameWidget, UserSelectionWidget,
+                       generate_user_camera, get_view_matrix, refresh_3d_view,
+                       refresh_sidebar_view, renderer)
+
+this = sys.modules[__name__]
+
+# Registered timers
+this.registry = dict()
 
 def is_annotating(context: bpy.types.Context):
     """ Check if the annotate mode is enabled
     """
     return bpy.context.workspace.tools.from_space_view3d_mode('OBJECT', create=False).idname == 'builtin.annotate'
 
-class Delayable():
-    """Delayable task interface
-    """
 
-    def register(self):
+class Timer(object):
-        raise NotImplementedError
-
-    def execute(self):
-        raise NotImplementedError
-
-    def unregister(self):
-        raise NotImplementedError
-
-
-class Timer(Delayable):
     """Timer binder interface for blender
 
     Run a bpy.app.Timer in the background looping at the given rate
     """
 
-    def __init__(self, duration=1):
+    def __init__(self, timeout=10, id=None):
-        super().__init__()
+        self._timeout = timeout
-        self._timeout = duration
         self.is_running = False
+        self.id =  id if id else self.__class__.__name__
 
     def register(self):
         """Register the timer into the blender timer system
         """
 
         if not self.is_running:
+            this.registry[self.id] = self 
             bpy.app.timers.register(self.main)
             self.is_running = True
             logging.debug(f"Register {self.__class__.__name__}")
@@ -105,21 +85,24 @@ class Timer(Delayable):
         """Unnegister the timer of the blender timer system
         """
         if bpy.app.timers.is_registered(self.main):
+            logging.info(f"Unregistering {self.id}")
             bpy.app.timers.unregister(self.main)
         
+        del this.registry[self.id]
         self.is_running = False
 
+class SessionBackupTimer(Timer):
+    def __init__(self, timeout=10, filepath=None):
+        self._filepath = filepath
+        super().__init__(timeout)
 
-class ApplyTimer(Timer):
-    def __init__(self, timout=1, target_type=None):
-        self._type = target_type
-        super().__init__(timout)
 
+    def execute(self):
+        session.save(self._filepath)
+
+class ApplyTimer(Timer):
     def execute(self):
         if session and session.state['STATE'] == STATE_ACTIVE:
-            if self._type:
-                nodes = session.list(filter=self._type)
-            else:
             nodes = session.list()
 
             for node in nodes:
@@ -129,19 +112,18 @@ class ApplyTimer(Timer):
                     try:
                         session.apply(node)
                     except Exception as e:
-                        logging.error(f"Fail to apply {node_ref.uuid}: {e}")
+                        logging.error(f"Fail to apply {node_ref.uuid}")
+                        traceback.print_exc()
                     else:
-                        if self._type.bl_reload_parent:
+                        if node_ref.bl_reload_parent:
-                            parents = []
+                            for parent in session._graph.find_parents(node):
+                                logging.debug("Refresh parent {node}")
+                                session.apply(parent, force=True)
 
-                            for n in session.list():
-                                deps = session.get(uuid=n).dependencies
-                                if deps and node in deps:
-                                    session.apply(n, force=True)
 
 class DynamicRightSelectTimer(Timer):
-    def __init__(self, timout=.1):
+    def __init__(self, timeout=.1):
-        super().__init__(timout)
+        super().__init__(timeout)
         self._last_selection = []
         self._user = None
         self._annotating = False
@@ -158,6 +140,9 @@ class DynamicRightSelectTimer(Timer):
                 ctx = bpy.context
                 annotation_gp = ctx.scene.grease_pencil
 
+                if annotation_gp and not annotation_gp.uuid:
+                    ctx.scene.update_tag()
+
                 # if an annotation exist and is tracked
                 if annotation_gp and annotation_gp.uuid:
                     registered_gp = session.get(uuid=annotation_gp.uuid)
@@ -172,6 +157,13 @@ class DynamicRightSelectTimer(Timer):
                                 settings.username,
                                 ignore_warnings=True,
                                 affect_dependencies=False)
+                        
+                        if registered_gp.owner == settings.username:
+                            gp_node = session.get(uuid=annotation_gp.uuid)
+                            if gp_node.has_changed():
+                                session.commit(gp_node.uuid)
+                                session.push(gp_node.uuid, check_data=False)
+
                     elif self._annotating:
                         session.change_owner(
                             registered_gp.uuid,
@@ -262,8 +254,8 @@ class DynamicRightSelectTimer(Timer):
 
 
 class ClientUpdate(Timer):
-    def __init__(self, timout=.1):
+    def __init__(self, timeout=.1):
-        super().__init__(timout)
+        super().__init__(timeout)
         self.handle_quit = False
         self.users_metadata = {}
 
@@ -325,16 +317,16 @@ class ClientUpdate(Timer):
 
 
 class SessionStatusUpdate(Timer):
-    def __init__(self, timout=1):
+    def __init__(self, timeout=1):
-        super().__init__(timout)
+        super().__init__(timeout)
 
     def execute(self):
         refresh_sidebar_view()
 
 
 class SessionUserSync(Timer):
-    def __init__(self, timout=1):
+    def __init__(self, timeout=1):
-        super().__init__(timout)
+        super().__init__(timeout)
         self.settings = utils.get_preferences()
 
     def execute(self):
@@ -367,8 +359,8 @@ class SessionUserSync(Timer):
 
 
 class MainThreadExecutor(Timer):
-    def __init__(self, timout=1, execution_queue=None):
+    def __init__(self, timeout=1, execution_queue=None):
-        super().__init__(timout)
+        super().__init__(timeout)
         self.execution_queue = execution_queue
 
     def execute(self):

multi_user/ui.py

@@ -29,6 +29,7 @@ from replication.constants import (ADDED, ERROR, FETCHED,
                                                      STATE_LAUNCHING_SERVICES)
 from replication import __version__
 from replication.interface import session
+from .timers import registry
 
 ICONS_PROP_STATES = ['TRIA_DOWN',  # ADDED
                      'TRIA_UP',  # COMMITED
@@ -268,7 +269,6 @@ class SESSION_PT_advanced_settings(bpy.types.Panel):
         if settings.sidebar_advanced_rep_expanded:
             replication_section_row = replication_section.row()
 
-            replication_section_row.label(text="Sync flags", icon='COLLECTION_NEW')
             replication_section_row = replication_section.row()
             replication_section_row.prop(settings.sync_flags, "sync_render_settings")
             replication_section_row = replication_section.row()
@@ -281,34 +281,8 @@ class SESSION_PT_advanced_settings(bpy.types.Panel):
                 warning = replication_section_row.box()
                 warning.label(text="Don't use this with heavy meshes !", icon='ERROR')
                 replication_section_row = replication_section.row()
+            replication_section_row.prop(settings, "depsgraph_update_rate", text="Apply delay")
 
-            replication_section_row.label(text="Update method", icon='RECOVER_LAST')
-            replication_section_row = replication_section.row()
-            replication_section_row.prop(settings, "update_method", expand=True)
-            replication_section_row = replication_section.row()
-            replication_timers = replication_section_row.box()
-            replication_timers.label(text="Replication timers", icon='TIME')
-            if settings.update_method == "DEFAULT":
-                replication_timers = replication_timers.row()
-                # Replication frequencies
-                flow = replication_timers.grid_flow(
-                    row_major=True, columns=0, even_columns=True, even_rows=False, align=True)
-                line = flow.row(align=True)
-                line.label(text=" ")
-                line.separator()
-                line.label(text="refresh (sec)")
-                line.label(text="apply (sec)")
-
-                for item in settings.supported_datablocks:
-                    line = flow.row(align=True)
-                    line.prop(item, "auto_push", text="", icon=item.icon)
-                    line.separator()
-                    line.prop(item, "bl_delay_refresh", text="")
-                    line.prop(item, "bl_delay_apply", text="")
-            else:
-                replication_timers = replication_timers.row()
-                replication_timers.label(text="Update rate (ms):")
-                replication_timers.prop(settings, "depsgraph_update_rate", text="")
         
         cache_section = layout.row().box()
         cache_section.prop(
@@ -563,6 +537,13 @@ class SESSION_PT_repository(bpy.types.Panel):
         row = layout.row()
 
         if session.state['STATE'] == STATE_ACTIVE:
+            if 'SessionBackupTimer' in registry:
+                row.alert = True
+                row.operator('session.cancel_autosave', icon="CANCEL")
+                row.alert = False
+            else:
+                row.operator('session.save', icon="FILE_TICK")
+
             flow = layout.grid_flow(
                 row_major=True,
                 columns=0,

multi_user/utils.py

@@ -65,6 +65,15 @@ def get_datablock_users(datablock):
     return users
 
 
+def flush_history():
+    try:
+        logging.debug("Flushing history")
+        for i in range(bpy.context.preferences.edit.undo_steps+1):
+            bpy.ops.ed.undo_push(message="Multiuser history flush")
+    except RuntimeError:
+        logging.error("Fail to overwrite history")
+
+
 def get_state_str(state):
     state_str = 'UNKOWN'
     if state == STATE_WAITING:

scripts/test_addon.py

@@ -13,7 +13,7 @@ def main():
     if len(sys.argv) > 2:
         blender_rev = sys.argv[2]
     else:
-        blender_rev = "2.91.0"
+        blender_rev = "2.92.0"
     
     try:
         exit_val = BAT.test_blender_addon(addon_path=addon, blender_revision=blender_rev)

tests/test_bl_types/test_object.py

@@ -7,7 +7,7 @@ import bpy
 import random
 from multi_user.bl_types.bl_object import BlObject
 
-# Removed 'BUILD' modifier because the seed doesn't seems to be
+# Removed 'BUILD', 'SOFT_BODY' modifier because the seed doesn't seems to be
 # correctly initialized (#TODO: report the bug)
 MOFIFIERS_TYPES = [
     'DATA_TRANSFER', 'MESH_CACHE', 'MESH_SEQUENCE_CACHE',
@@ -22,8 +22,7 @@ MOFIFIERS_TYPES = [
     'MESH_DEFORM', 'SHRINKWRAP', 'SIMPLE_DEFORM', 'SMOOTH',
     'CORRECTIVE_SMOOTH', 'LAPLACIANSMOOTH', 'SURFACE_DEFORM',
     'WARP', 'WAVE', 'CLOTH', 'COLLISION', 'DYNAMIC_PAINT',
-    'EXPLODE', 'FLUID', 'OCEAN', 'PARTICLE_INSTANCE',
+    'EXPLODE', 'FLUID', 'OCEAN', 'PARTICLE_INSTANCE', 'SURFACE']
-    'SOFT_BODY', 'SURFACE']
 
 GP_MODIFIERS_TYPE = [
     'GP_ARRAY', 'GP_BUILD', 'GP_MIRROR', 'GP_MULTIPLY',
@@ -72,5 +71,5 @@ def test_object(clear_blend):
     test = implementation._construct(expected)
     implementation._load(expected, test)
     result = implementation._dump(test)
-
+    print(DeepDiff(expected, result))
     assert not DeepDiff(expected, result)