feat: cache managenent utility

multi_user/bl_types/bl_file.py

@@ -63,16 +63,10 @@ class BlFile(ReplicatedDatablock):
     def __init__(self, *args, **kwargs):
         super().__init__(*args, **kwargs)
         self.instance = kwargs.get('instance', None)
-        # TODO: ensure absolute path
-        # TODO: ensure file exist
-
         self.preferences = utils.get_preferences()
         self.diff_method = DIFF_BINARY
 
     def resolve(self):
-        # TODO: generic check
-        os.makedirs(self.preferences.cache_directory, exist_ok=True)
-
         if self.data:
             self.instance = Path(get_filepath(self.data['name']))
 

multi_user/operators.py

@@ -27,6 +27,8 @@ from operator import itemgetter
 from pathlib import Path
 from subprocess import PIPE, Popen, TimeoutExpired
 import zmq
+import shutil
+from pathlib import Path
 
 import bpy
 import mathutils
@@ -608,6 +610,34 @@ class ApplyArmatureOperator(bpy.types.Operator):
         stop_modal_executor = False
 
 
+class ClearCache(bpy.types.Operator):
+    "Clear local session cache"
+    bl_idname = "session.clear_cache"
+    bl_label = "Modal Executor Operator"
+
+    @classmethod
+    def poll(cls, context):
+        return True
+
+    def execute(self, context):
+        cache_dir =  utils.get_preferences().cache_directory
+        try:
+            for root, dirs, files in os.walk(cache_dir):
+                for name in files:
+                    Path(root, name).unlink()
+
+        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 ? ")
+
 classes = (
     SessionStartOperator,
     SessionStopOperator,
@@ -620,7 +650,7 @@ classes = (
     ApplyArmatureOperator,
     SessionKickOperator,
     SessionInitOperator,
-
+    ClearCache,
 )
 
 

multi_user/preferences.py

@@ -20,6 +20,9 @@ import logging
 import bpy
 import string
 import re
+import os
+
+from pathlib import Path
 
 from . import bl_types, environment, addon_updater_ops, presence, ui
 from .utils import get_preferences, get_expanded_icon
@@ -68,6 +71,16 @@ def update_port(self, context):
         self['ipc_port'] = random.randrange(self.port+4, 10000)
 
 
+def update_directory(self, context):
+    new_dir = Path(self.cache_directory)
+    if new_dir.exists() and any(Path(self.cache_directory).iterdir()):
+        logging.error("The folder is not empty, choose another one.")
+        self['cache_directory'] = environment.DEFAULT_CACHE_DIR
+    elif not new_dir.exists():
+        logging.info("Target cache folder doesn't exist, creating it.")
+        os.makedirs(self.cache_directory, exist_ok=True)
+
+
 def set_log_level(self, value):
     logging.getLogger().setLevel(value)
 
@@ -136,7 +149,8 @@ class SessionPrefs(bpy.types.AddonPreferences):
     cache_directory: bpy.props.StringProperty(
         name="cache directory",
         subtype="DIR_PATH",
-        default=environment.DEFAULT_CACHE_DIR)
+        default=environment.DEFAULT_CACHE_DIR,
+        update=update_directory)
     connection_timeout: bpy.props.IntProperty(
         name='connection timeout',
         description='connection timeout before disconnection',

multi_user/ui.py

@@ -19,7 +19,7 @@
 import bpy
 
 from . import operators
-from .utils import get_preferences, get_expanded_icon
+from .utils import get_preferences, get_expanded_icon, get_folder_size
 from replication.constants import (ADDED, ERROR, FETCHED,
                                                      MODIFIED, RP_COMMON, UP,
                                                      STATE_ACTIVE, STATE_AUTH,
@@ -371,7 +371,8 @@ class SESSION_PT_advanced_settings(bpy.types.Panel):
             cache_section_row = cache_section.row()
             cache_section_row.label(text="Clear memory filecache:")
             cache_section_row.prop(settings, "clear_memory_filecache", text="")
-
+            cache_section_row = cache_section.row()
+            cache_section_row.operator('session.clear_cache', text=f"Clear cache ({get_folder_size(settings.cache_directory)})")
         log_section = layout.row().box()
         log_section.prop(
             settings,

multi_user/utils.py

@@ -21,8 +21,10 @@ import logging
 import os
 import sys
 import time
-from uuid import uuid4
 from collections.abc import Iterable
+from pathlib import Path
+from uuid import uuid4
+import math
 
 import bpy
 import mathutils
@@ -78,6 +80,7 @@ def resolve_from_id(id, optionnal_type=None):
                 return root[id]
     return None
 
+
 def get_datablock_from_uuid(uuid, default, ignore=[]):
     if not uuid:
         return default
@@ -90,6 +93,7 @@ def get_datablock_from_uuid(uuid, default, ignore=[]):
                     return item
     return default
 
+
 def get_preferences():
     return bpy.context.preferences.addons[__package__].preferences
 
@@ -103,3 +107,61 @@ def get_expanded_icon(prop: bpy.types.BoolProperty) -> str:
         return 'DISCLOSURE_TRI_DOWN'
     else:
         return 'DISCLOSURE_TRI_RIGHT'
+
+
+# Taken from here: https://stackoverflow.com/a/55659577
+def get_folder_size(folder):
+    return ByteSize(sum(file.stat().st_size for file in Path(folder).rglob('*')))
+
+
+class ByteSize(int):
+
+    _kB = 1024
+    _suffixes = 'B', 'kB', 'MB', 'GB', 'PB'
+
+    def __new__(cls, *args, **kwargs):
+        return super().__new__(cls, *args, **kwargs)
+
+    def __init__(self, *args, **kwargs):
+        self.bytes = self.B = int(self)
+        self.kilobytes = self.kB = self / self._kB**1
+        self.megabytes = self.MB = self / self._kB**2
+        self.gigabytes = self.GB = self / self._kB**3
+        self.petabytes = self.PB = self / self._kB**4
+        *suffixes, last = self._suffixes
+        suffix = next((
+            suffix
+            for suffix in suffixes
+            if 1 < getattr(self, suffix) < self._kB
+        ), last)
+        self.readable = suffix, getattr(self, suffix)
+
+        super().__init__()
+
+    def __str__(self):
+        return self.__format__('.2f')
+
+    def __repr__(self):
+        return '{}({})'.format(self.__class__.__name__, super().__repr__())
+
+    def __format__(self, format_spec):
+        suffix, val = self.readable
+        return '{val:{fmt}} {suf}'.format(val=math.ceil(val), fmt=format_spec, suf=suffix)
+
+    def __sub__(self, other):
+        return self.__class__(super().__sub__(other))
+
+    def __add__(self, other):
+        return self.__class__(super().__add__(other))
+
+    def __mul__(self, other):
+        return self.__class__(super().__mul__(other))
+
+    def __rsub__(self, other):
+        return self.__class__(super().__sub__(other))
+
+    def __radd__(self, other):
+        return self.__class__(super().__add__(other))
+
+    def __rmul__(self, other):
+        return self.__class__(super().__rmul__(other))