fix: abort availability sync job if auth token invalid/connection lost (#845)

This fix aborts the media availability sync job if the following conditions are met:
a) auth token has expired
b) connection to jellyfin/emby has been lost
Previously, the sync job will continue even if auth token was invalid or
connection was lost, thereby, resulting in removal of series/movies that
were never removed on jellyfin/emby/sonarr/radarr. This also removed the
requests. With the current fix, the sync job should refuse to run unless
the auth token is valid.

server/lib/availabilitySync.ts

@@ -73,16 +73,16 @@ class AvailabilitySync {
         });
       }
 
-      if (mediaServerType === MediaServerType.PLEX) {
+      switch (mediaServerType) {
+        case MediaServerType.PLEX:
           if (admin && admin.plexToken) {
             this.plexClient = new PlexAPI({ plexToken: admin.plexToken });
           } else {
             logger.error('Plex admin is not configured.');
           }
-      } else if (
+          break;
-        mediaServerType === MediaServerType.JELLYFIN ||
+        case MediaServerType.JELLYFIN:
-        mediaServerType === MediaServerType.EMBY
+        case MediaServerType.EMBY:
-      ) {
           if (admin) {
             this.jellyfinClient = new JellyfinAPI(
               getHostname(),
@@ -91,11 +91,32 @@ class AvailabilitySync {
             );
 
             this.jellyfinClient.setUserId(admin.jellyfinUserId ?? '');
-        } else {
+
-          logger.error('Jellyfin admin is not configured.');
+            try {
+              await this.jellyfinClient.getSystemInfo();
+            } catch (e) {
+              logger.error('Sync interrupted.', {
+                label: 'AvailabilitySync',
+                status: e.statusCode,
+                error: e.name,
+                errorMessage: e.errorCode,
+              });
+
+              this.running = false;
+              return;
             }
           } else {
+            logger.error('Jellyfin admin is not configured.');
+
+            this.running = false;
+            return;
+          }
+          break;
+        default:
           logger.error('An admin is not configured.');
+
+          this.running = false;
+          return;
       }
 
       for await (const media of this.loadAvailableMediaPaginated(pageSize)) {