Add provider update startup check

app.py

@@ -23,6 +23,7 @@ from urllib.parse import quote, urljoin, urlparse
 
 import app_support
 import provider_bridge
+import provider_updates
 from app_support import (
     AGENT,
     ANIDB_ANIME_PAGE,
@@ -97,6 +98,8 @@ WATCHLIST_REFRESH = None
 WATCHLIST_AUTO_REFRESH = None
 WATCHLIST_JELLYFIN_SYNC = None
 WATCHLIST_BACKUP_FORMAT_VERSION = 1
+PROVIDER_UPDATE_STATUS = provider_updates.default_status()
+PROVIDER_UPDATE_CHECK_THREAD = None
 
 
 def parse_iso_timestamp(value):
@@ -3183,6 +3186,44 @@ def runtime_state():
     }
 
 
+def get_provider_update_status():
+    with RUNTIME_LOCK:
+        return json.loads(json.dumps(PROVIDER_UPDATE_STATUS))
+
+
+def set_provider_update_status(status):
+    if not isinstance(status, dict):
+        return
+    with RUNTIME_LOCK:
+        global PROVIDER_UPDATE_STATUS
+        PROVIDER_UPDATE_STATUS = json.loads(json.dumps(status))
+
+
+def run_provider_update_check():
+    try:
+        set_provider_update_status(provider_updates.check_provider_updates())
+    except Exception as exc:
+        debug_log("provider_updates.error", error=exc)
+        set_provider_update_status(provider_updates.error_status(exc))
+
+
+def start_provider_update_check():
+    global PROVIDER_UPDATE_CHECK_THREAD
+    with RUNTIME_LOCK:
+        if PROVIDER_UPDATE_CHECK_THREAD is not None and PROVIDER_UPDATE_CHECK_THREAD.is_alive():
+            return PROVIDER_UPDATE_CHECK_THREAD
+        PROVIDER_UPDATE_STATUS.update(
+            provider_updates.default_status("checking", "Checking provider JavaScript for upstream updates...")
+        )
+        PROVIDER_UPDATE_CHECK_THREAD = threading.Thread(
+            target=run_provider_update_check,
+            name="provider-update-check",
+            daemon=True,
+        )
+        PROVIDER_UPDATE_CHECK_THREAD.start()
+        return PROVIDER_UPDATE_CHECK_THREAD
+
+
 def build_runtime(start_workers=None):
     ensure_project_app_root()
     worker_state = background_workers_enabled() if start_workers is None else bool(start_workers) and background_workers_enabled()
@@ -3323,6 +3364,7 @@ Handler = build_handler_class(
         episode_list=episode_list,
         export_watchlist_backup=export_watchlist_backup,
         get_config_snapshot=get_config_snapshot,
+        get_provider_update_status=get_provider_update_status,
         get_watchlist_homepage_summary=get_watchlist_homepage_summary,
         get_jellyfin_sync_status=get_jellyfin_sync_status,
         get_watchlist=get_watchlist,
@@ -3367,6 +3409,7 @@ def main():
     host = server_host()
     port = server_port()
     server = ThreadingHTTPServer((host, port), Handler)
+    start_provider_update_check()
     debug_log("server.start", version=VERSION, host=host, port=port, argv=sys.argv[1:])
     print(f"Serving {APP_NAME} {VERSION} on http://{host}:{port}/")
     try: