Работа над RemoteLib

server/core/RemoteLib.js

@@ -0,0 +1,56 @@
+const fs = require('fs-extra');
+const utils = require('./utils');
+
+const WebSocketConnection = require('./WebSocketConnection');
+
+//singleton
+let instance = null;
+
+class RemoteLib {
+    constructor(config) {
+        if (!instance) {
+            this.config = config;
+
+            this.wsc = new WebSocketConnection(config.remoteLib.url, 10, 30, {rejectUnauthorized: false});
+            if (config.remoteLib.accessPassword)
+                this.accessToken = utils.getBufHash(config.remoteLib.accessPassword, 'sha256', 'hex');
+
+            this.inpxFile = `${config.tempDir}/${utils.randomHexString(20)}`;
+            this.lastUpdateTime = 0;
+
+            instance = this;
+        }
+
+        return instance;
+    }
+
+    async wsRequest(query) {
+        if (this.accessToken)
+            query.accessToken = this.accessToken;
+
+        const response = await this.wsc.message(
+            await this.wsc.send(query, 60),
+            60
+        );
+
+        if (response.error)
+            throw new Error(response.error);
+
+        return response;
+    }
+
+    async getInpxFile(getPeriod = 0) {
+        if (getPeriod && Date.now() - this.lastUpdateTime < getPeriod)
+            return this.inpxFile;
+
+        const response = await this.wsRequest({action: 'get-inpx-file'});
+
+        await fs.writeFile(this.inpxFile, response.data, 'base64');
+
+        this.lastUpdateTime = Date.now();
+
+        return this.inpxFile;
+    }
+}
+
+module.exports = RemoteLib;