feat: notes for furtur improvements

fix: node_tree animation dependencies

multi_user/__init__.py

@@ -59,6 +59,7 @@ def register():
 
         from . import presence
         from . import operators
+        from . import handlers
         from . import ui
         from . import preferences
         from . import addon_updater_ops
@@ -67,6 +68,7 @@ def register():
         addon_updater_ops.register(bl_info)
         presence.register()
         operators.register()
+        handlers.register()
         ui.register()
     except ModuleNotFoundError as e:
         raise Exception(module_error_msg)
@@ -87,6 +89,7 @@ def register():
 def unregister():
     from . import presence
     from . import operators
+    from . import handlers
     from . import ui
     from . import preferences
     from . import addon_updater_ops
@@ -96,6 +99,7 @@ def unregister():
     presence.unregister()
     addon_updater_ops.unregister()
     ui.unregister()
+    handlers.unregister()
     operators.unregister()
     preferences.unregister()
 

multi_user/bl_types/bl_action.py

@@ -219,7 +219,7 @@ def load_fcurve(fcurve_data, fcurve):
 def dump_animation_data(datablock):
     animation_data = {}
     if has_action(datablock):
-            animation_data['action'] = datablock.animation_data.action.name
+        animation_data['action'] = datablock.animation_data.action.uuid
     if has_driver(datablock):
         animation_data['drivers'] = []
         for driver in datablock.animation_data.drivers:
@@ -241,8 +241,10 @@ def load_animation_data(animation_data, datablock):
             for driver in animation_data['drivers']:
                 load_driver(datablock, driver)
 
-        if 'action' in animation_data:
+        action = animation_data.get('action')
-            datablock.animation_data.action = bpy.data.actions[animation_data['action']]
+        if action:
+            action = resolve_datablock_from_uuid(action, bpy.data.actions)
+            datablock.animation_data.action = action
         elif datablock.animation_data.action:
             datablock.animation_data.action = None
 
@@ -259,6 +261,8 @@ def resolve_animation_dependencies(datablock):
 
 
 class BlAction(ReplicatedDatablock):
+    use_delta = True
+
     bl_id = "actions"
     bl_class = bpy.types.Action
     bl_check_common = False

multi_user/bl_types/bl_armature.py

@@ -37,6 +37,8 @@ def get_roll(bone: bpy.types.Bone) -> float:
 
 
 class BlArmature(ReplicatedDatablock):
+    use_delta = True
+
     bl_id = "armatures"
     bl_class = bpy.types.Armature
     bl_check_common = False

multi_user/bl_types/bl_camera.py

@@ -26,6 +26,8 @@ from .bl_action import dump_animation_data, load_animation_data, resolve_animati
 
 
 class BlCamera(ReplicatedDatablock):
+    use_delta = True
+
     bl_id = "cameras"
     bl_class = bpy.types.Camera
     bl_check_common = False

multi_user/bl_types/bl_curve.py

@@ -137,6 +137,8 @@ SPLINE_METADATA = [
 
 
 class BlCurve(ReplicatedDatablock):
+    use_delta = True
+
     bl_id = "curves"
     bl_class = bpy.types.Curve
     bl_check_common = False

multi_user/bl_types/bl_lattice.py

@@ -29,6 +29,8 @@ POINT = ['co', 'weight_softbody', 'co_deform']
 
 
 class BlLattice(ReplicatedDatablock):
+    use_delta = True
+
     bl_id = "lattices"
     bl_class = bpy.types.Lattice
     bl_check_common = False

multi_user/bl_types/bl_light.py

@@ -26,6 +26,8 @@ from .bl_action import dump_animation_data, load_animation_data, resolve_animati
 
 
 class BlLight(ReplicatedDatablock):
+    use_delta = True
+
     bl_id = "lights"
     bl_class = bpy.types.Light
     bl_check_common = False

multi_user/bl_types/bl_lightprobe.py

@@ -25,6 +25,8 @@ from replication.protocol import ReplicatedDatablock
 from .bl_datablock import resolve_datablock_from_uuid
 
 class BlLightprobe(ReplicatedDatablock):
+    use_delta = True
+
     bl_id = "lightprobes"
     bl_class = bpy.types.LightProbe
     bl_check_common = False

multi_user/bl_types/bl_material.py

@@ -397,11 +397,14 @@ def load_materials_slots(src_materials: list, dst_materials: bpy.types.bpy_prop_
 
 
 class BlMaterial(ReplicatedDatablock):
+    use_delta = True
+
     bl_id = "materials"
     bl_class = bpy.types.Material
     bl_check_common = False
     bl_icon = 'MATERIAL_DATA'
     bl_reload_parent = False
+    bl_reload_child = True
 
     @staticmethod
     def construct(data: dict) -> object:
@@ -409,8 +412,6 @@ class BlMaterial(ReplicatedDatablock):
 
     @staticmethod
     def load(data: dict, datablock: object):
-        load_animation_data(data.get('animation_data'), datablock)
-
         loader = Loader()
 
         is_grease_pencil = data.get('is_grease_pencil')
@@ -427,6 +428,8 @@ class BlMaterial(ReplicatedDatablock):
                 datablock.use_nodes = True
 
             load_node_tree(data['node_tree'], datablock.node_tree)
+            load_animation_data(data.get('nodes_animation_data'), datablock.node_tree)
+        load_animation_data(data.get('animation_data'), datablock)
 
     @staticmethod
     def dump(datablock: object) -> dict:
@@ -494,8 +497,10 @@ class BlMaterial(ReplicatedDatablock):
             data['grease_pencil'] = gp_mat_dumper.dump(datablock.grease_pencil)
         elif datablock.use_nodes:
             data['node_tree'] = dump_node_tree(datablock.node_tree)
+            data['nodes_animation_data'] = dump_animation_data(datablock.node_tree)
 
         data['animation_data'] = dump_animation_data(datablock)
+
         return data
 
     @staticmethod
@@ -509,7 +514,7 @@ class BlMaterial(ReplicatedDatablock):
 
         if datablock.use_nodes:
             deps.extend(get_node_tree_dependencies(datablock.node_tree))
-
+            deps.extend(resolve_animation_dependencies(datablock.node_tree))
         deps.extend(resolve_animation_dependencies(datablock))
 
         return deps

multi_user/bl_types/bl_mesh.py

@@ -55,6 +55,8 @@ POLYGON = [
 ]
 
 class BlMesh(ReplicatedDatablock):
+    use_delta = True
+
     bl_id = "meshes"
     bl_class = bpy.types.Mesh
     bl_check_common = False

multi_user/bl_types/bl_metaball.py

@@ -65,6 +65,8 @@ def load_metaball_elements(elements_data, elements):
 
 
 class BlMetaball(ReplicatedDatablock):
+    use_delta = True
+
     bl_id = "metaballs"
     bl_class = bpy.types.MetaBall
     bl_check_common = False

multi_user/bl_types/bl_node_group.py

@@ -28,6 +28,8 @@ from .bl_datablock import resolve_datablock_from_uuid
 from .bl_action import dump_animation_data, load_animation_data, resolve_animation_dependencies
 
 class BlNodeGroup(ReplicatedDatablock):
+    use_delta = True
+
     bl_id = "node_groups"
     bl_class = bpy.types.NodeTree
     bl_check_common = False

multi_user/bl_types/bl_object.py

@@ -493,6 +493,8 @@ def load_modifiers_custom_data(dumped_modifiers: dict, modifiers: bpy.types.bpy_
         
             
 class BlObject(ReplicatedDatablock):
+    use_delta = True
+
     bl_id = "objects"
     bl_class = bpy.types.Object
     bl_check_common = False

multi_user/bl_types/bl_particle.py

@@ -41,6 +41,8 @@ IGNORED_ATTR = [
 ]
 
 class BlParticle(ReplicatedDatablock):
+    use_delta = True
+
     bl_id = "particles"
     bl_class = bpy.types.ParticleSettings
     bl_icon = "PARTICLES"

multi_user/bl_types/bl_speaker.py

@@ -25,6 +25,8 @@ from .bl_datablock import resolve_datablock_from_uuid
 from .bl_action import dump_animation_data, load_animation_data, resolve_animation_dependencies
 
 class BlSpeaker(ReplicatedDatablock):
+    use_delta = True
+
     bl_id = "speakers"
     bl_class = bpy.types.Speaker
     bl_check_common = False

multi_user/bl_types/bl_texture.py

@@ -26,6 +26,8 @@ from .bl_action import dump_animation_data, load_animation_data, resolve_animati
 import bpy.types as T
 
 class BlTexture(ReplicatedDatablock):
+    use_delta = True
+
     bl_id = "textures"
     bl_class = bpy.types.Texture
     bl_check_common = False

multi_user/bl_types/bl_volume.py

@@ -27,6 +27,8 @@ from .bl_material import dump_materials_slots, load_materials_slots
 from .bl_action import dump_animation_data, load_animation_data, resolve_animation_dependencies
 
 class BlVolume(ReplicatedDatablock):
+    use_delta = True
+
     bl_id = "volumes"
     bl_class = bpy.types.Volume
     bl_check_common = False

multi_user/bl_types/bl_world.py

@@ -30,6 +30,8 @@ from .bl_action import dump_animation_data, load_animation_data, resolve_animati
 
 
 class BlWorld(ReplicatedDatablock):
+    use_delta = True
+
     bl_id = "worlds"
     bl_class = bpy.types.World
     bl_check_common = True

multi_user/handlers.py

@@ -0,0 +1,150 @@
+# ##### 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 logging
+
+import bpy
+from bpy.app.handlers import persistent
+from replication import porcelain
+from replication.constants import RP_COMMON, STATE_ACTIVE, STATE_SYNCING, UP
+from replication.exception import ContextError, NonAuthorizedOperationError
+from replication.interface import session
+
+from . import shared_data, utils
+
+
+def sanitize_deps_graph(remove_nodes: bool = False):
+    """ Cleanup the replication graph
+    """
+    if session and session.state == STATE_ACTIVE:
+        start = utils.current_milli_time()
+        rm_cpt = 0
+        for node in session.repository.graph.values():
+            node.instance = session.repository.rdp.resolve(node.data)
+            if node is None \
+                    or (node.state == UP and not node.instance):
+                if remove_nodes:
+                    try:
+                        porcelain.rm(session.repository,
+                                     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, removed {rm_cpt} nodes")
+
+
+def update_external_dependencies():
+    """Force external dependencies(files such as images) evaluation 
+    """
+    nodes_ids = [n.uuid for n in session.repository.graph.values() if n.data['type_id'] in ['WindowsPath', 'PosixPath']]
+    for node_id in nodes_ids:
+        node = session.repository.graph.get(node_id)
+        if node and node.owner in [session.repository.username, RP_COMMON]:
+            porcelain.commit(session.repository, node_id)
+            porcelain.push(session.repository, 'origin', node_id)
+
+
+@persistent
+def on_scene_update(scene):
+    """Forward blender depsgraph update to replication
+    """
+    if session and session.state == STATE_ACTIVE:
+        context = bpy.context
+        blender_depsgraph = bpy.context.view_layer.depsgraph
+        dependency_updates = [u for u in blender_depsgraph.updates]
+        settings = utils.get_preferences()
+        incoming_updates = shared_data.session.applied_updates
+
+        distant_update = [getattr(u.id, 'uuid', None) for u in dependency_updates if getattr(u.id, 'uuid', None) in incoming_updates]
+        if distant_update:
+            for u in distant_update:
+                shared_data.session.applied_updates.remove(u)
+            logging.debug(f"Ignoring distant update of {dependency_updates[0].id.name}")
+            return
+
+        update_external_dependencies()
+
+        # NOTE: maybe we don't need to check each update but only the first
+        for update in reversed(dependency_updates):
+            update_uuid = getattr(update.id, 'uuid', None)
+            if update_uuid:
+                node = session.repository.graph.get(update.id.uuid)
+                check_common = session.repository.rdp.get_implementation(update.id).bl_check_common
+
+                if node and (node.owner == session.repository.username or check_common):
+                    logging.debug(f"Evaluate {update.id.name}")
+                    if node.state == UP:
+                        try:
+                            porcelain.commit(session.repository, node.uuid)
+                            porcelain.push(session.repository,
+                                           'origin', node.uuid)
+                        except ReferenceError:
+                            logging.debug(f"Reference error {node.uuid}")
+                        except ContextError as e:
+                            logging.debug(e)
+                        except Exception as e:
+                            logging.error(e)
+                else:
+                    continue
+            elif isinstance(update.id, bpy.types.Scene):
+                scn_uuid = porcelain.add(session.repository, update.id)
+                porcelain.commit(session.repository, scn_uuid)
+                porcelain.push(session.repository, 'origin', scn_uuid)
+
+
+@persistent
+def resolve_deps_graph(dummy):
+    """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_ACTIVE:
+        sanitize_deps_graph(remove_nodes=True)
+
+
+@persistent
+def load_pre_handler(dummy):
+    if session and session.state in [STATE_ACTIVE, STATE_SYNCING]:
+        bpy.ops.session.stop()
+
+
+@persistent
+def update_client_frame(scene):
+    if session and session.state == STATE_ACTIVE:
+        porcelain.update_user_metadata(session.repository, {
+            'frame_current': scene.frame_current
+        })
+
+
+def register():
+    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)
+
+
+def unregister():
+    bpy.app.handlers.undo_post.remove(resolve_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/operators.py

@@ -27,12 +27,12 @@ import shutil
 import string
 import sys
 import time
+import traceback
 from datetime import datetime
 from operator import itemgetter
 from pathlib import Path
 from queue import Queue
 from time import gmtime, strftime
-import traceback
 
 from bpy.props import FloatProperty
 
@@ -45,16 +45,17 @@ import bpy
 import mathutils
 from bpy.app.handlers import persistent
 from bpy_extras.io_utils import ExportHelper, ImportHelper
+from replication import porcelain
 from replication.constants import (COMMITED, FETCHED, RP_COMMON, STATE_ACTIVE,
                                    STATE_INITIAL, STATE_SYNCING, UP)
-from replication.protocol import DataTranslationProtocol
 from replication.exception import ContextError, NonAuthorizedOperationError
 from replication.interface import session
-from replication import porcelain
-from replication.repository import Repository
 from replication.objects import Node
+from replication.protocol import DataTranslationProtocol
+from replication.repository import Repository
 
-from . import bl_types, environment, timers, ui, utils
+from . import bl_types, environment, shared_data, timers, ui, utils
+from .handlers import on_scene_update, sanitize_deps_graph
 from .presence import SessionStatusWidget, renderer, view3d_find
 from .timers import registry
 
@@ -99,7 +100,7 @@ def initialize_session():
 
         # Step 2: Load nodes
         logging.info("Applying nodes")
-        for node in session.repository.index_sorted:
+        for node in session.repository.heads:
             porcelain.apply(session.repository, node)
 
     logging.info("Registering timers")
@@ -112,7 +113,7 @@ def initialize_session():
     utils.flush_history()
 
     # Step 6: Launch deps graph update handling
-    bpy.app.handlers.depsgraph_update_post.append(depsgraph_evaluation)
+    bpy.app.handlers.depsgraph_update_post.append(on_scene_update)
 
 
 @session_callback('on_exit')
@@ -132,8 +133,8 @@ def on_connection_end(reason="none"):
 
     stop_modal_executor = True
 
-    if depsgraph_evaluation in bpy.app.handlers.depsgraph_update_post:
+    if on_scene_update in bpy.app.handlers.depsgraph_update_post:
-        bpy.app.handlers.depsgraph_update_post.remove(depsgraph_evaluation)
+        bpy.app.handlers.depsgraph_update_post.remove(on_scene_update)
 
     # Step 3: remove file handled
     logger = logging.getLogger()
@@ -603,9 +604,9 @@ class SessionApply(bpy.types.Operator):
             node_ref = session.repository.graph.get(self.target)
             porcelain.apply(session.repository,
                             self.target,
-                            force=True,
+                            force=True)
-                            force_dependencies=self.reset_dependencies)
             impl = session.repository.rdp.get_implementation(node_ref.instance)
+            # NOTE: find another way to handle child and parent automatic reloading
             if impl.bl_reload_parent:
                 for parent in session.repository.graph.get_parents(self.target):
                     logging.debug(f"Refresh parent {parent}")
@@ -613,6 +614,11 @@ class SessionApply(bpy.types.Operator):
                     porcelain.apply(session.repository,
                                     parent.uuid,
                                     force=True)
+            if hasattr(impl, 'bl_reload_child') and impl.bl_reload_child:
+                for dep in node_ref.dependencies:
+                    porcelain.apply(session.repository,
+                                    dep,
+                                    force=True)
         except Exception as e:
             self.report({'ERROR'}, repr(e))
             traceback.print_exc()
@@ -636,7 +642,7 @@ class SessionCommit(bpy.types.Operator):
     def execute(self, context):
         try:
             porcelain.commit(session.repository, self.target)
-            porcelain.push(session.repository, 'origin', self.target)
+            porcelain.push(session.repository, 'origin', self.target, force=True)
             return {"FINISHED"}
         except Exception as e:
             self.report({'ERROR'}, repr(e))
@@ -684,6 +690,7 @@ class SessionPurgeOperator(bpy.types.Operator):
     def execute(self, context):
         try:
             sanitize_deps_graph(remove_nodes=True)
+            porcelain.purge_orphan_nodes(session.repository)
         except Exception as e:
             self.report({'ERROR'}, repr(e))
 
@@ -716,7 +723,6 @@ class SessionNotifyOperator(bpy.types.Operator):
         layout = self.layout
         layout.row().label(text=self.message)
 
-
     def invoke(self, context, event):
         return context.window_manager.invoke_props_dialog(self)
 
@@ -919,110 +925,6 @@ classes = (
 )
 
 
-def update_external_dependencies():
-    nodes_ids = [n.uuid for n in session.repository.graph.values() if n.data['type_id'] in ['WindowsPath', 'PosixPath']]
-    for node_id in nodes_ids:
-        node = session.repository.graph.get(node_id)
-        if node and node.owner in [session.repository.username, RP_COMMON]:
-            porcelain.commit(session.repository, node_id)
-            porcelain.push(session.repository,'origin', node_id)
-
-
-def sanitize_deps_graph(remove_nodes: bool = False):
-    """ Cleanup the replication graph
-    """
-    if session and session.state == STATE_ACTIVE:
-        start = utils.current_milli_time()
-        rm_cpt = 0
-        for node in session.repository.graph.values():
-            node.instance = session.repository.rdp.resolve(node.data)
-            if node is None \
-                    or (node.state == UP and not node.instance):
-                if remove_nodes:
-                    try:
-                        porcelain.rm(session.repository,
-                                     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, removed {rm_cpt} nodes")
-
-
-@persistent
-def resolve_deps_graph(dummy):
-    """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_ACTIVE:
-        sanitize_deps_graph(remove_nodes=True)
-
-
-@persistent
-def load_pre_handler(dummy):
-    if session and session.state in [STATE_ACTIVE, STATE_SYNCING]:
-        bpy.ops.session.stop()
-
-
-@persistent
-def update_client_frame(scene):
-    if session and session.state == STATE_ACTIVE:
-        porcelain.update_user_metadata(session.repository, {
-            'frame_current': scene.frame_current
-        })
-
-
-@persistent
-def depsgraph_evaluation(scene):
-    if session and session.state == STATE_ACTIVE:
-        context = bpy.context
-        blender_depsgraph = bpy.context.view_layer.depsgraph
-        dependency_updates = [u for u in blender_depsgraph.updates]
-        settings = utils.get_preferences()
-
-        update_external_dependencies()
-
-        is_internal = [u for u in dependency_updates if u.is_updated_geometry or u.is_updated_shading or u.is_updated_transform]
-
-        # NOTE: maybe we don't need to check each update but only the first
-        if not is_internal:
-            return
-        for update in reversed(dependency_updates):
-            # Is the object tracked ?
-            if update.id.uuid:
-                # Retrieve local version
-                node = session.repository.graph.get(update.id.uuid)
-                check_common = session.repository.rdp.get_implementation(update.id).bl_check_common
-                # 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
-                if node and (node.owner == session.repository.username or check_common):
-                    if node.state == UP:
-                        try:
-                            porcelain.commit(session.repository, node.uuid)
-                            porcelain.push(session.repository, 'origin', node.uuid)
-                        except ReferenceError:
-                            logging.debug(f"Reference error {node.uuid}")
-                        except ContextError as e:
-                            logging.debug(e) 
-                        except Exception as e:
-                            logging.error(e)
-                else:
-                    continue
-            # A new scene is created 
-            elif isinstance(update.id, bpy.types.Scene):
-                ref = session.repository.get_node_by_datablock(update.id)
-                if ref:
-                    pass
-                else:
-                    scn_uuid = porcelain.add(session.repository, update.id)
-                    porcelain.commit(session.node_id, scn_uuid)
-                    porcelain.push(session.repository,'origin', scn_uuid)
 def register():
     from bpy.utils import register_class
 
@@ -1030,13 +932,6 @@ def register():
         register_class(cls)
 
 
-    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)
-
-
 def unregister():
     if session and session.state == STATE_ACTIVE:
         session.disconnect()
@@ -1044,9 +939,3 @@ def unregister():
     from bpy.utils import unregister_class
     for cls in reversed(classes):
         unregister_class(cls)
-
-    bpy.app.handlers.undo_post.remove(resolve_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/shared_data.py

@@ -0,0 +1,48 @@
+# ##### 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 #####
+
+from replication.constants import STATE_INITIAL
+
+
+class SessionData():
+    """ A structure to share easily the current session data across the addon
+        modules.
+        This object will completely replace the Singleton lying in replication
+        interface module.  
+    """
+
+    def __init__(self):
+        self.repository = None  # The current repository
+        self.remote = None  # The active remote
+        self.server = None
+        self.applied_updates = []
+
+    @property
+    def state(self):
+        if self.remote is None:
+            return STATE_INITIAL
+        else:
+            return self.remote.connection_status
+
+    def clear(self):
+        self.remote = None
+        self.repository = None
+        self.server = None
+        self.applied_updates = []
+
+
+session = SessionData()

multi_user/timers.py

@@ -31,6 +31,8 @@ from .presence import (UserFrustumWidget, UserNameWidget, UserSelectionWidget,
                        generate_user_camera, get_view_matrix, refresh_3d_view,
                        refresh_sidebar_view, renderer)
 
+from . import shared_data 
+
 this = sys.modules[__name__]
 
 # Registered timers
@@ -114,6 +116,7 @@ class ApplyTimer(Timer):
 
                 if node_ref.state == FETCHED:
                     try:
+                        shared_data.session.applied_updates.append(node)
                         porcelain.apply(session.repository, node)
                     except Exception as e:
                         logging.error(f"Fail to apply {node_ref.uuid}")
@@ -126,6 +129,11 @@ class ApplyTimer(Timer):
                                 porcelain.apply(session.repository,
                                       parent.uuid,
                                       force=True)
+                        if hasattr(impl, 'bl_reload_child') and impl.bl_reload_child:
+                            for dep in node_ref.dependencies:
+                                porcelain.apply(session.repository,
+                                                dep,
+                                                force=True)
 
 
 class DynamicRightSelectTimer(Timer):
@@ -251,6 +259,7 @@ class DynamicRightSelectTimer(Timer):
                     is_selectable = not session.repository.is_node_readonly(object_uuid)
                     if obj.hide_select != is_selectable:
                         obj.hide_select = is_selectable
+                        shared_data.session.applied_updates.append(object_uuid)
 
 
 class ClientUpdate(Timer):

multi_user/utils.py

@@ -38,6 +38,14 @@ from replication.constants import (STATE_ACTIVE, STATE_AUTH,
                                   STATE_LOBBY,
                                   CONNECTING)
 
+CLEARED_DATABLOCKS = ['actions', 'armatures', 'cache_files', 'cameras',
+                     'collections', 'curves', 'filepath', 'fonts',
+                     'grease_pencils', 'images', 'lattices', 'libraries',
+                     'lightprobes', 'lights', 'linestyles', 'masks',
+                     'materials', 'meshes', 'metaballs', 'movieclips',
+                     'node_groups', 'objects', 'paint_curves', 'particles',
+                     'scenes', 'shape_keys', 'sounds', 'speakers', 'texts',
+                     'textures', 'volumes', 'worlds']
 
 def find_from_attr(attr_name, attr_value, list):
     for item in list:
@@ -101,23 +109,25 @@ def get_state_str(state):
 
 
 def clean_scene():
-    to_delete = [f for f in dir(bpy.data) if f not in ['brushes', 'palettes']]
+    for type_name in CLEARED_DATABLOCKS:
-    for type_name in to_delete:
+        sub_collection_to_avoid = [
-        try:
+            bpy.data.linestyles.get('LineStyle'),
-            sub_collection_to_avoid = [bpy.data.linestyles['LineStyle'], bpy.data.materials['Dots Stroke']]
+            bpy.data.materials.get('Dots Stroke')
+        ]
+
         type_collection = getattr(bpy.data, type_name)
         items_to_remove = [i for i in type_collection if i not in sub_collection_to_avoid]
         for item in items_to_remove:
             try:
                 type_collection.remove(item)
-                except:
+                logging.info(item.name)
-                    continue
             except:
                 continue
 
     # Clear sequencer
     bpy.context.scene.sequence_editor_clear()
 
+
 def get_selected_objects(scene, active_view_layer):
     return [obj.uuid for obj in scene.objects if obj.select_get(view_layer=active_view_layer)]