Issue #ED-389 feat: Updated resource bundles to fetch from Blob Storage

src/app/helpers/resourceBundles/index.js

-let dateFormat = require('dateformat')
 const envHelper = require('../environmentVariablesHelper.js')
 let HttpStatus = require('http-status-codes')
-let uuidv1 = require('uuid/v1')
 let path = require('path')
 let fs = require('fs')
 const API_VERSION = '1.0'
-const compression = require('compression')
+const compression = require('compression');
+const dateFormat        = require('dateformat');
+const uuidv1            = require('uuid/v1');
+const { logger }        = require('@project-sunbird/logger');
+const StorageService    = require('../../helpers/cloudStorage/index');
 
 function sendSuccessResponse (res, id, result, code = HttpStatus.OK) {
   res.status(code)
@@ -67,33 +69,37 @@ function getErrorCode (httpCode) {
 
 module.exports = function (express) {
   var router = express.Router()
-  router.get('/read/:lang?', compression(), (requestObj, responseObj, next) => {
-    var lang = requestObj.params['lang'] || envHelper.sunbird_default_language
-
-    try {
-      var bundles = JSON.parse(fs.readFileSync(path.join(__dirname, '/./../../resourcebundles/json/', lang + '.json')))
-      sendSuccessResponse(responseObj, 'api.resoucebundles.read', bundles, HttpStatus.OK)
-    } catch (err) {
-      if (err.code === 'ENOENT') {
-        sendErrorResponse(responseObj, 'api.resoucebundles.read', '', 404)
-      } else {
-        sendErrorResponse(responseObj, 'api.resoucebundles.read', '', 500)
-      }
+  router.get(['/readLang/:lang?', '/read/:lang?'], compression(), (requestObj, responseObj, next) => {
+    logger.info({ msg: "Calling API - " + requestObj.url });
+    let container;
+    let blobName = requestObj['params']['lang'] ? requestObj['params']['lang'] : envHelper.sunbird_default_language;
+    blobName += '.json';
+    if (envHelper.sunbird_cloud_storage_provider === 'azure') {
+      container = envHelper.sunbird_azure_resourceBundle_container_name;
     }
-  })
-  router.get('/readLang/:lang?', compression(), (requestObj, responseObj, next) => {
-    var lang = requestObj.params['lang'] || envHelper.sunbird_default_language
-    console.log(lang);
-    try {
-      var bundles = JSON.parse(fs.readFileSync(path.join(__dirname, '/./../../resourcebundles/json/', lang + '.json')))
-      sendSuccessResponse(responseObj, 'api.resoucebundles.read', bundles, HttpStatus.OK)
-    } catch (err) {
-      if (err.code === 'ENOENT') {
-        sendErrorResponse(responseObj, 'api.resoucebundles.read', '', 404)
+    if (envHelper.sunbird_cloud_storage_provider === 'aws') {
+      container = envHelper.sunbird_aws_labels + '/';
+    }
+    if (envHelper.sunbird_cloud_storage_provider === 'gcloud') {
+      container = envHelper.sunbird_gcloud_labels + '/';
+    }
+    StorageService.CLOUD_CLIENT.getFileAsText(container, blobName, function (error, result, response) {
+      if (error && error.statusCode === 404) {
+        logger.error({ msg: "readLang :: Blob %s wasn't found container %s", blobName, container });
+        sendErrorResponse(responseObj, 'api.resoucebundles.read', '', 404);
       } else {
-        sendErrorResponse(responseObj, 'api.resoucebundles.read', '', 500)
+        try {
+          const _parsedOutput = JSON.parse(result);
+          sendSuccessResponse(responseObj, 'api.resoucebundles.read', _parsedOutput, HttpStatus.OK);
+        } catch (err) {
+          if (err.code === 'ENOENT') {
+            sendErrorResponse(responseObj, 'api.resoucebundles.read', '', 404);
+          } else {
+            sendErrorResponse(responseObj, 'api.resoucebundles.read', '', 500);
+          }
+        }
       }
-    }
-  })
+    });
+  });
   return router
 }