file_manager: set a metadata version to force re-processing

When an entry is removed from metadata also remove associated thumbnails.

Signed-off-by:  Eric Callahan <arksine.code@gmail.com>

moonraker/plugins/file_manager.py

@@ -622,6 +622,7 @@ class FileManager:
 
 METADATA_PRUNE_TIME = 600000
 METADATA_NAMESPACE = "gcode_metadata"
+METADATA_VERSION = 2
 
 class MetadataStorage:
     def __init__(self, server, gc_path, database):
@@ -629,6 +630,14 @@ class MetadataStorage:
         database.register_local_namespace(METADATA_NAMESPACE)
         self.mddb = database.wrap_namespace(
             METADATA_NAMESPACE, parse_keys=False)
+        version = database.get_item(
+            "moonraker", "file_manager.metadata_version", 0)
+        if version != METADATA_VERSION:
+            # Clear existing metadata when version is bumped
+            self.mddb.clear()
+            database.insert_item(
+                "moonraker", "file_manager.metadata_version",
+                METADATA_VERSION)
         self.pending_requests = {}
         self.events = {}
         self.busy = False
@@ -657,7 +666,7 @@ class MetadataStorage:
         for fname in list(self.mddb.keys()):
             fpath = os.path.join(self.gc_path, fname)
             if not os.path.exists(fpath):
-                del self.mddb[fname]
+                self.remove_file(fname)
                 logging.info(f"Pruned file: {fname}")
                 continue
 
@@ -666,10 +675,21 @@ class MetadataStorage:
         return mdata['size'] == fsize and mdata['modified'] == modified
 
     def remove_file(self, fname):
-        try:
-            del self.mddb[fname]
-        except Exception:
-            pass
+        metadata = self.mddb.pop(fname, None)
+        if metadata is None:
+            return
+        # Delete associated thumbnails
+        fdir = os.path.dirname(os.path.join(self.gc_path, fname))
+        if "thumbnails" in metadata:
+            for thumb in metadata["thumbnails"]:
+                path = thumb.get("relative_path", None)
+                if path is None:
+                    continue
+                thumb_path = os.path.join(fdir, path)
+                try:
+                    os.remove(thumb_path)
+                except Exception:
+                    logging.debug(f"Error removing thumb at {thumb_path}")
 
     def parse_metadata(self, fname, fsize, modified, notify=False):
         evt = Event()