Add countEntries

src/db/roomstore.ts

@@ -98,6 +98,22 @@ export class DbRoomStore {
         this.entriesMatrixIdCache = new TimedCache(ENTRY_CACHE_LIMETIME);
     }
 
+    /**
+     * Returns the number of bridged room pairs. Every connection between a
+     * Matrix room and a remote room counts as one pair.
+     * @returns {number} The amount of room pairs as an integer
+     */
+    public async countEntries() {
+        const row = (await this.db.Get("SELECT COUNT(*) FROM room_entries")) || {};
+
+        if (typeof row.count !== "number") {
+            log.error("Failed to count room entries");
+            throw Error("Failed to count room entries");
+        }
+
+        return row.count;
+    }
+
     public async upsertEntry(entry: IRoomStoreEntry) {
         const promises: Promise<void>[] = [];