Fix xxxWindowPreference management

backend/README.md

@@ -2,32 +2,21 @@
 
 The backend is static. Typescript scripts are compiled into the `dist` folder and served through a node web server.
 
-You can avoid the manual shutdown/recompile/restart command line cycle by setting up watchers.
+You can avoid the manual shutdown/recompile/restart command line cycle by using a watcher.
 
 Make sure you are in the `backend` directory `cd backend`.
 
-1. Install nodemon 
+1. Install nodemon and ts-node
+
 ```
-sudo npm install -g nodemon
-```
-2. [Optional] Add the following configuration into `tsconfig.json`. You can find watch options here https://www.typescriptlang.org/docs/handbook/configuring-watch.html
-```
-    "watchOptions": {
-      "watchFile": "useFsEvents",
-      "watchDirectory": "useFsEvents",
-      "fallbackPolling": "dynamicPriority",
-      "synchronousWatchDirectory": true,
-      "excludeDirectories": ["**/node_modules", "_build"],
-      "excludeFiles": ["build/fileWhichChangesOften.ts"]
-    }
-```
-3. In one terminal, watch typescript scripts
-```
-./node_modules/typescript/bin/tsc --watch
-```
-4. In another terminal, watch compiled javascript
-```
-nodemon --max-old-space-size=2048 dist/index.js
+sudo npm install -g ts-node nodemon
+```
+
+2. Run the watcher
+
+> Note: You can find your npm global binary folder using `npm -g bin`, where nodemon will be installed.
+
+```
+nodemon src/index.ts --ignore cache/
 ```
 
-Everytime you save a backend `.ts` file, `tsc` will recompile it and genereate a new static `.js` file in the `dist` folder. `nodemon` will detect this new file and restart the node web server automatically.

backend/src/repositories/BlocksRepository.ts

@@ -38,29 +38,12 @@ class BlocksRepository {
 
       await connection.query(query, params);
     } catch (e) {
-      console.log(e);
       logger.err('$updateBlocksDatabase() error' + (e instanceof Error ? e.message : e));
     }
 
     connection.release();
   }
 
-  /**
-   * Check if a block has already been indexed in the database. Query the databse directly.
-   * This can be cached/optimized if required later on to avoid too many db queries.
-   */
-  public async $isBlockAlreadyIndexed(blockHeight: number) {
-    const connection = await DB.pool.getConnection();
-    let exists = false;
-
-    const query = `SELECT height from blocks where blocks.height = ${blockHeight}`;
-    const [rows]: any[] = await connection.query(query);
-    exists = rows.length === 1;
-    connection.release();
-
-    return exists;
-  }
-
   /**
    * Get all block height that have not been indexed between [startHeight, endHeight]
    */