Работа над BookUpdateChecker

server/core/BookUpdateChecker/BUCClient.js

@@ -0,0 +1,64 @@
+const JembaConnManager = require('../../db/JembaConnManager');//singleton
+
+const ayncExit = new (require('../AsyncExit'))();
+const utils = require('../utils');
+const log = new (require('../AppLogger'))().log;//singleton
+
+const minuteMs = 60*1000;
+const hourMs = 60*minuteMs;
+
+let instance = null;
+
+//singleton
+class BUCClient {
+    constructor(config) {
+        if (!instance) {
+            this.config = config;
+
+            this.connManager = new JembaConnManager();
+            this.db = this.connManager.db['book-update-server'];
+
+            //константы
+            if (this.config.branch !== 'development') {
+                this.syncPeriod = 1*hourMs;//период синхронизации с сервером BUC
+            } else {
+                this.syncPeriod = 1*minuteMs;//период синхронизации с сервером BUC
+            }
+
+            this.fromCheckTime = 1;
+
+            this.main();//no await
+
+            instance = this;
+        }
+
+        return instance;
+    }
+
+    async checkBuc(bookUrls) {
+        return [];
+    }
+
+    async findMaxCheckTime() {
+        let result = 1;
+
+        return result;
+    }
+
+    async main() {
+        if (!this.config.bucEnabled)
+            throw new Error('BookUpdateChecker disabled');
+
+        try {
+            this.fromCheckTime = await this.findMaxCheckTime();
+            this.periodicSync();//no await
+
+            log(`BUC Client started`);
+        } catch (e) {
+            log(LM_FATAL, e.stack);
+            ayncExit.exit(1);
+        }
+    }
+}
+
+module.exports = BUCClient;