feat: notes for furtur improvements

fix: node_tree animation dependencies

README.md

@@ -32,32 +32,32 @@ Currently, not all data-block are supported for replication over the wire. The f
 | Name           | Status |                           Comment                            |
 | -------------- | :----: | :----------------------------------------------------------: |
 | action         |   ✔️    |                                                              |
-| armature       |   ❗    |                          Not stable                          |
 | camera         |   ✔️    |                                                              |
 | collection     |   ✔️    |                                                              |
-| curve          |   ❗    |                 Nurbs surfaces not supported                 |
 | gpencil        |   ✔️    |                                                              |
 | image          |   ✔️    |                                                              |
 | mesh           |   ✔️    |                                                              |
 | material       |   ✔️    |                                                              |
-| node_groups    |   ❗    |                   Material & Geometry only                   |
+| node_groups    |   ✔️    |                   Material & Geometry only                   |
 | geometry nodes |   ✔️    |                                                              |
 | metaball       |   ✔️    |                                                              |
 | object         |   ✔️    |                                                              |
-| textures       |   ❗    |       Supported for modifiers/materials/geo nodes only       |
 | texts          |   ✔️    |                                                              |
 | scene          |   ✔️    |                                                              |
 | world          |   ✔️    |                                                              |
-| lightprobes    |   ✔️    |                                                              |
-| compositing    |   ❌    | [Planned](https://gitlab.com/slumber/multi-user/-/issues/46) |
-| texts          |   ❌    | [Planned](https://gitlab.com/slumber/multi-user/-/issues/81) |
-| nla            |   ❌    |                                                              |
 | volumes        |   ✔️    |                                                              |
+| lightprobes    |   ✔️    |                                                              |
+| physics        |   ✔️    |                                                              |
+| curve          |   ❗    |                 Nurbs surfaces not supported                 |
+| textures       |   ❗    |       Supported for modifiers/materials/geo nodes only       |
+| armature       |   ❗    |                          Not stable                          |
 | 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                            |
+| nla            |   ❌    |                                                              |
+| texts          |   ❌    | [Planned](https://gitlab.com/slumber/multi-user/-/issues/81) |
+| compositing    |   ❌    | [Planned](https://gitlab.com/slumber/multi-user/-/issues/46) |
 
 
 

docs/getting_started/quickstart.rst

@@ -108,36 +108,69 @@ Before starting make sure that you have access to the session IP address and por
 1. Fill in your user information
 --------------------------------
 
-Follow the user-info_ section for this step.
+Joining a server 
+=======================
 
-----------------
-2. Network setup
-----------------
+--------------
+Network setup
+--------------
 
 In the network panel, select **JOIN**.
 The **join sub-panel** (see image below) allows you to configure your client to join a
 collaborative session which is already hosted.
 
-.. figure:: img/quickstart_join.png
-   :align: center
-   :alt: Connect menu
+.. figure:: img/server_preset_image_normal_server.png
+    :align: center
+    :width: 200px
 
-   Connection panel
+    Connection pannel
 
 Fill in the fields with your information:
 
 - **IP**: the host's IP address.
 - **Port**: the host's port number.
-- **Connect as admin**: connect yourself with **admin rights** (see :ref:`admin` ) to the session.
-
-.. Maybe something more explicit here
-
-.. note::
-   Additional configuration settings can be found in the :ref:`advanced` section.
 
 Once you've configured every field, hit the button **CONNECT** to join the session !
 When the :ref:`session-status` is **ONLINE** you are online and ready to start co-creating.
 
+.. note::
+   
+   If you want to have **administrator rights** (see :ref:`admin` ) on the server, just enter the password created by the host in the **Connect as admin** section
+
+    .. figure:: img/server_preset_image_admin.png
+        :align: center
+        :width: 200px
+
+        Admin password
+
+---------------
+Server presets
+---------------
+
+You can save your server presets in a preset list below the 'JOIN' and 'HOST' buttons. This allows you to quickly access and manage your servers.
+
+To add a server, first enter the ip address and the port (plus the password if needed), then click on the + icon to add a name to your preset. To remove a server from the list, select it and click on the - icon.
+
+.. figure:: img/server_preset_exemple.gif
+    :align: center
+    :width: 200px
+
+.. warning:: Be careful, if you don't rename your new preset, or if it has the same name as an existing preset, the old preset will be overwritten.
+
+    .. figure:: img/server_preset_image_report.png
+        :align: center
+        :width: 200px
+
+.. note:: 
+   
+   Two presets are already present when the addon is launched:
+
+  - The 'localhost' preset, to host and join a local session quickly
+  - The 'public session' preset, to join the public sessions of the multi-user server (official discord to participate : https://discord.gg/aBPvGws)
+
+.. note::
+   Additional configuration settings can be found in the :ref:`advanced` section.
+
 .. note::
    When starting a **dedicated server**, the session status screen will take you to the **LOBBY**, awaiting an admin to start the session.
 

docs/tutorials/hosting_guide.rst

@@ -76,7 +76,7 @@ Hit 'Create a network'(see image below) and go to the network settings.
     :align: center
     :width: 450px
 
-    Network page
+    Admin password
 
 Now that the network is created, let's configure it.
 

multi_user/__init__.py

@@ -43,9 +43,10 @@ from bpy.app.handlers import persistent
 from . import environment
 
 
-
 module_error_msg = "Insufficient rights to install the multi-user \
                 dependencies, aunch blender with administrator rights."
+
+
 def register():
     # Setup logging policy
     logging.basicConfig(
@@ -58,6 +59,7 @@ def register():
 
         from . import presence
         from . import operators
+        from . import handlers
         from . import ui
         from . import preferences
         from . import addon_updater_ops
@@ -66,6 +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)
@@ -86,6 +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
@@ -95,6 +99,7 @@ def unregister():
     presence.unregister()
     addon_updater_ops.unregister()
     ui.unregister()
+    handlers.unregister()
     operators.unregister()
     preferences.unregister()
 

multi_user/addon_updater.py

@@ -1688,10 +1688,7 @@ class GitlabEngine(object):
 		# Could clash with tag names and if it does, it will
 		# download TAG zip instead of branch zip to get
 		# direct path, would need.
-		return "{}{}{}".format(
-			self.form_repo_url(updater),
-			"/repository/archive.zip?sha=",
-			branch)
+		return f"https://gitlab.com/slumber/multi-user/-/jobs/artifacts/{branch}/download?job=build"
 
 	def get_zip_url(self, sha, updater):
 		return "{base}/repository/archive.zip?sha={sha}".format(

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:
-            datablock.animation_data.action = bpy.data.actions[animation_data['action']]
+        action = animation_data.get('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
@@ -664,7 +666,11 @@ class BlObject(ReplicatedDatablock):
             'show_all_edges',
             'show_texture_space',
             'show_in_front',
-            'type'
+            'type',
+            'parent_type',
+            'parent_bone',
+            'track_axis',
+            'up_axis',
         ]
 
         data = dumper.dump(datablock)

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 +27,14 @@ 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
 
 try:
     import _pickle as pickle
@@ -43,16 +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
 
@@ -97,7 +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")
@@ -110,7 +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')
@@ -130,8 +133,8 @@ def on_connection_end(reason="none"):
 
     stop_modal_executor = True
 
-    if depsgraph_evaluation in bpy.app.handlers.depsgraph_update_post:
-        bpy.app.handlers.depsgraph_update_post.remove(depsgraph_evaluation)
+    if on_scene_update in bpy.app.handlers.depsgraph_update_post:
+        bpy.app.handlers.depsgraph_update_post.remove(on_scene_update)
 
     # Step 3: remove file handled
     logger = logging.getLogger()
@@ -160,7 +163,7 @@ class SessionStartOperator(bpy.types.Operator):
         settings = utils.get_preferences()
         runtime_settings = context.window_manager.session
         users = bpy.data.window_managers['WinMan'].online_users
-        admin_pass = runtime_settings.password
+        admin_pass = settings.password
 
         users.clear()
         deleyables.clear()
@@ -601,9 +604,9 @@ class SessionApply(bpy.types.Operator):
             node_ref = session.repository.graph.get(self.target)
             porcelain.apply(session.repository,
                             self.target,
-                            force=True,
-                            force_dependencies=self.reset_dependencies)
+                            force=True)
             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}")
@@ -611,6 +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()
@@ -634,7 +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))
@@ -682,6 +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))
 
@@ -714,7 +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)
 
@@ -821,6 +829,75 @@ class SessionLoadSaveOperator(bpy.types.Operator, ImportHelper):
     def poll(cls, context):
         return True
 
+class SessionPresetServerAdd(bpy.types.Operator):
+    """Add a server to the server list preset"""
+    bl_idname = "session.preset_server_add"
+    bl_label = "add server preset"
+    bl_description = "add the current server to the server preset list"
+    bl_options = {"REGISTER"}
+
+    name : bpy.props.StringProperty(default="server_preset")
+    
+    @classmethod
+    def poll(cls, context):
+        return True
+
+    def invoke(self, context, event):
+        assert(context)
+        return context.window_manager.invoke_props_dialog(self)
+
+    def draw(self, context):
+        layout = self.layout
+
+        col = layout.column()
+        settings = utils.get_preferences()
+        
+        col.prop(settings, "server_name", text="server name")
+        
+    def execute(self, context):
+        assert(context)
+
+        settings = utils.get_preferences()
+
+        existing_preset = settings.server_preset.get(settings.server_name)
+
+        new_server = existing_preset if existing_preset else settings.server_preset.add()
+        new_server.name = settings.server_name
+        new_server.server_ip = settings.ip
+        new_server.server_port = settings.port
+        new_server.server_password = settings.password
+
+        settings.server_preset_interface = settings.server_name
+
+        if new_server == existing_preset :
+            self.report({'INFO'}, "Server '" + settings.server_name + "' override")
+        else :
+            self.report({'INFO'}, "New '" + settings.server_name + "' server preset")
+
+        return {'FINISHED'}
+
+
+class SessionPresetServerRemove(bpy.types.Operator):
+    """Remove a server to the server list preset"""
+    bl_idname = "session.preset_server_remove"
+    bl_label = "remove server preset"
+    bl_description = "remove the current server from the server preset list"
+    bl_options = {"REGISTER"}
+    
+    @classmethod
+    def poll(cls, context):
+        return True
+
+    def execute(self, context):
+        assert(context)
+
+        settings = utils.get_preferences()
+
+        settings.server_preset.remove(settings.server_preset.find(settings.server_preset_interface))
+
+        return {'FINISHED'}
+        
+
 
 def menu_func_import(self, context):
     self.layout.operator(SessionLoadSaveOperator.bl_idname, text='Multi-user session snapshot (.db)')
@@ -838,118 +915,16 @@ classes = (
     SessionKickOperator,
     SessionInitOperator,
     SessionClearCache,
-    SessionNotifyOperator,
+    SessionNotifyOperator, 
     SessionSaveBackupOperator,
     SessionLoadSaveOperator,
     SessionStopAutoSaveOperator,
     SessionPurgeOperator,
+    SessionPresetServerAdd,
+    SessionPresetServerRemove,
 )
 
 
-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
 
@@ -957,13 +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()
@@ -971,9 +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/preferences.py

@@ -33,6 +33,19 @@ from replication.interface import session
 IP_REGEX = re.compile("^(([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])\.){3}([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])$")
 HOSTNAME_REGEX = re.compile("^(([a-zA-Z0-9]|[a-zA-Z0-9][a-zA-Z0-9\-]*[a-zA-Z0-9])\.)*([A-Za-z0-9]|[A-Za-z0-9][A-Za-z0-9\-]*[A-Za-z0-9])$")
 
+DEFAULT_PRESETS = {
+    "localhost" : {
+        "server_ip": "localhost",
+        "server_port": 5555,
+        "server_password": "admin"
+    },
+    "public session" : {
+        "server_ip": "51.75.71.183",
+        "server_port": 5555,
+        "server_password": ""
+    },
+}
+
 def randomColor():
     """Generate a random color """
     r = random.random()
@@ -65,8 +78,11 @@ def update_ip(self, context):
         logging.error("Wrong IP format")
         self['ip'] = "127.0.0.1"
 
-
-
+def update_server_preset_interface(self, context):
+    self.server_name = self.server_preset.get(self.server_preset_interface).name
+    self.ip = self.server_preset.get(self.server_preset_interface).server_ip
+    self.port = self.server_preset.get(self.server_preset_interface).server_port
+    self.password = self.server_preset.get(self.server_preset_interface).server_password 
 
 def update_directory(self, context):
     new_dir = Path(self.cache_directory)
@@ -93,6 +109,10 @@ class ReplicatedDatablock(bpy.types.PropertyGroup):
     auto_push: bpy.props.BoolProperty(default=True)
     icon: bpy.props.StringProperty()
 
+class ServerPreset(bpy.types.PropertyGroup):
+    server_ip: bpy.props.StringProperty()
+    server_port: bpy.props.IntProperty(default=5555)
+    server_password: bpy.props.StringProperty(default="admin", subtype = "PASSWORD")
 
 def set_sync_render_settings(self, value):
     self['sync_render_settings'] = value
@@ -145,7 +165,7 @@ class SessionPrefs(bpy.types.AddonPreferences):
     ip: bpy.props.StringProperty(
         name="ip",
         description='Distant host ip',
-        default="127.0.0.1",
+        default="localhost",
         update=update_ip)
     username: bpy.props.StringProperty(
         name="Username",
@@ -160,6 +180,17 @@ class SessionPrefs(bpy.types.AddonPreferences):
         description='Distant host port',
         default=5555
     )
+    server_name: bpy.props.StringProperty(
+        name="server_name",
+        description="Custom name of the server",
+        default='localhost',
+    )
+    password: bpy.props.StringProperty(
+        name="password",
+        default=random_string_digits(),
+        description='Session password',
+        subtype='PASSWORD'
+    )
     sync_flags: bpy.props.PointerProperty(
         type=ReplicationFlags
     )
@@ -321,6 +352,25 @@ class SessionPrefs(bpy.types.AddonPreferences):
         max=59
     )
 
+    # Server preset
+    def server_list_callback(scene, context):
+        settings = get_preferences()
+        enum = []
+        for i in settings.server_preset:
+            enum.append((i.name, i.name, ""))
+        return enum
+
+    server_preset: bpy.props.CollectionProperty(
+        name="server preset",
+        type=ServerPreset,
+    )
+    server_preset_interface: bpy.props.EnumProperty(
+        name="servers",
+        description="servers enum",
+        items=server_list_callback,
+        update=update_server_preset_interface,
+    )
+
     # Custom panel
     panel_category: bpy.props.StringProperty(
         description="Choose a name for the category of the panel",
@@ -420,6 +470,18 @@ class SessionPrefs(bpy.types.AddonPreferences):
             new_db.bl_name = impl.bl_id
 
 
+    # custom at launch server preset
+    def generate_default_presets(self): 
+        for preset_name, preset_data in DEFAULT_PRESETS.items():
+            existing_preset = self.server_preset.get(preset_name)
+            if existing_preset :
+                continue
+            new_server = self.server_preset.add()
+            new_server.name = preset_name
+            new_server.server_ip = preset_data.get('server_ip')
+            new_server.server_port = preset_data.get('server_port')
+            new_server.server_password = preset_data.get('server_password',None)
+
 
 def client_list_callback(scene, context):
     from . import operators
@@ -501,12 +563,6 @@ class SessionProps(bpy.types.PropertyGroup):
         description='Connect as admin',
         default=False
     )
-    password: bpy.props.StringProperty(
-        name="password",
-        default=random_string_digits(),
-        description='Session password',
-        subtype='PASSWORD'
-    )
     internet_ip: bpy.props.StringProperty(
         name="internet ip",
         default="no found",
@@ -528,6 +584,7 @@ classes = (
     SessionProps,
     ReplicationFlags,
     ReplicatedDatablock,
+    ServerPreset,
     SessionPrefs,
 )
 
@@ -542,6 +599,10 @@ def register():
     if len(prefs.supported_datablocks) == 0:
         logging.debug('Generating bl_types preferences')
         prefs.generate_supported_types()
+    
+    # at launch server presets
+    prefs.generate_default_presets()
+        
 
 
 def unregister():

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
@@ -89,7 +91,7 @@ class Timer(object):
         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
 
@@ -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/ui.py

@@ -156,7 +156,13 @@ class SESSION_PT_settings_network(bpy.types.Panel):
         row = layout.row()
         row.prop(runtime_settings, "session_mode", expand=True)
         row = layout.row()
+                     
+        col = row.row(align=True)
+        col.prop(settings, "server_preset_interface", text="")
+        col.operator("session.preset_server_add", icon='ADD', text="")
+        col.operator("session.preset_server_remove", icon='REMOVE', text="")
 
+        row = layout.row()
         box = row.box()
 
         if runtime_settings.session_mode == 'HOST':
@@ -168,7 +174,7 @@ class SESSION_PT_settings_network(bpy.types.Panel):
             row.prop(settings, "init_method", text="")
             row = box.row()
             row.label(text="Admin password:")
-            row.prop(runtime_settings, "password", text="")
+            row.prop(settings, "password", text="")
             row = box.row()
             row.operator("session.start", text="HOST").host = True
         else:
@@ -184,11 +190,10 @@ class SESSION_PT_settings_network(bpy.types.Panel):
             if runtime_settings.admin:
                 row = box.row()
                 row.label(text="Password:")
-                row.prop(runtime_settings, "password", text="")
+                row.prop(settings, "password", text="")
             row = box.row()
             row.operator("session.start", text="CONNECT").host = False
 
-
 class SESSION_PT_settings_user(bpy.types.Panel):
     bl_idname = "MULTIUSER_SETTINGS_USER_PT_panel"
     bl_label = "User info"

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:
@@ -101,17 +109,25 @@ def get_state_str(state):
 
 
 def clean_scene():
-    for type_name in dir(bpy.data):
-        try:
-            type_collection = getattr(bpy.data, type_name)
-            for item in type_collection:
+    for type_name in CLEARED_DATABLOCKS:
+        sub_collection_to_avoid = [
+            bpy.data.linestyles.get('LineStyle'),
+            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:
-            continue
-    
+                logging.info(item.name)
+            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)]
 

scripts/test_addon.py

@@ -13,7 +13,7 @@ def main():
     if len(sys.argv) > 2:
         blender_rev = sys.argv[2]
     else:
-        blender_rev = "2.92.0"
+        blender_rev = "2.93.0"
     
     try:
         exit_val = BAT.test_blender_addon(addon_path=addon, blender_revision=blender_rev)