Remove media patch, put usnLim in server code

Since dae/anki@d6874de8, usnLim always returns -1 regardless of the
`server` attribute.

Reference: d6874de8c8

ankisyncd/__init__.py

@@ -1,34 +1,5 @@
-import functools
 import os
 import sys
 
-def __mediapatch():
-    """
-    Monkey-patch Anki's MediaManager to ignore the "server" attribute.
-
-    It's needed because MediaManager's __init__(), connect() and close() are
-    close to no-ops when self.col.server is True. If self.col.server is False,
-    Syncer.usnLim() doesn't match entities that are supposed to be sent to the
-    client, thus breaking server→client deck sync.
-    """
-
-    def noserver(f):
-        @functools.wraps(f)
-        def wrapped(self, *args, **kwargs):
-            orig = self.col.server
-            self.col.server = False
-            ret = f(self, *args, **kwargs)
-            self.col.server = orig
-            return ret
-        return wrapped
-
-    from anki.media import MediaManager
-    orig_init = MediaManager.__init__
-
-    MediaManager.__init__ = functools.wraps(MediaManager.__init__)(lambda self, col, _: orig_init(self, col, False))
-    MediaManager.connect = noserver(MediaManager.connect)
-    MediaManager.close = noserver(MediaManager.close)
-
 sys.path.insert(0, "/usr/share/anki")
 sys.path.insert(0, os.path.join(os.path.dirname(os.path.dirname(__file__)), "anki-bundled"))
-__mediapatch()

ankisyncd/collection.py

@@ -49,7 +49,7 @@ class CollectionWrapper:
         # mkdir -p the path, because it might not exist
         os.makedirs(os.path.dirname(self.path), exist_ok=True)
 
-        col = anki.storage.Collection(self.path, server=True)
+        col = anki.storage.Collection(self.path)
 
         # Do any special setup
         if self.setup_new_collection is not None:
@@ -61,7 +61,7 @@ class CollectionWrapper:
         """Open the collection, or create it if it doesn't exist."""
         if self.__col is None:
             if os.path.exists(self.path):
-                self.__col = anki.storage.Collection(self.path, server=True)
+                self.__col = anki.storage.Collection(self.path)
             else:
                 self.__col = self.__create_collection()
 

ankisyncd/sync_app.py

@@ -91,6 +91,9 @@ class SyncCollectionHandler(anki.sync.Syncer):
             'cont': True,
         }
 
+    def usnLim(self):
+        return "usn >= %d" % self.minUsn
+
 class SyncMediaHandler(anki.sync.MediaSyncer):
     operations = ['begin', 'mediaChanges', 'mediaSanity', 'uploadChanges', 'downloadFiles']