Refactor FilesAdapter to ES6 style.

src/GridStoreAdapter.js

@@ -3,46 +3,41 @@
 // Stores files in Mongo using GridStore
 // Requires the database adapter to be based on mongoclient
 
-var GridStore = require('mongodb').GridStore;
-var path = require('path');
+import { GridStore } from 'mongodb';
 
-// For a given config object, filename, and data, store a file
-// Returns a promise
-function create(config, filename, data) {
-  return config.database.connect().then(() => {
-    var gridStore = new GridStore(config.database.db, filename, 'w');
-    return gridStore.open();
-  }).then((gridStore) => {
-    return gridStore.write(data);
-  }).then((gridStore) => {
-    return gridStore.close();
-  });
-}
+import * as Path from 'path';
+import { FilesAdapter } from './FilesAdapter';
 
-// Search for and return a file if found by filename
-// Resolves a promise that succeeds with the buffer result
-// from GridStore
-function get(config, filename) {
-  return config.database.connect().then(() => {
-    return GridStore.exist(config.database.db, filename);
-  }).then(() => {
-    var gridStore = new GridStore(config.database.db, filename, 'r');
-    return gridStore.open();
-  }).then((gridStore) => {
-    return gridStore.read();
-  });
-}
+class GridStoreAdapter extends FilesAdapter {
+  // For a given config object, filename, and data, store a file
+  // Returns a promise
+  createFileAsync(config, filename, data) {
+    return config.database.connect().then(() => {
+      let gridStore = new GridStore(config.database.db, filename, 'w');
+      return gridStore.open();
+    }).then((gridStore) => {
+      return gridStore.write(data);
+    }).then((gridStore) => {
+      return gridStore.close();
+    });
+  }
 
-// Generates and returns the location of a file stored in GridStore for the
-// given request and filename
-function location(config, req, filename) {
-  return (req.protocol + '://' + req.get('host') +
-    path.dirname(req.originalUrl) + '/' + req.config.applicationId +
+  getFileDataAsync(config, filename) {
+    return config.database.connect().then(() => {
+      return GridStore.exist(config.database.db, filename);
+    }).then(() => {
+      let gridStore = new GridStore(config.database.db, filename, 'r');
+      return gridStore.open();
+    }).then((gridStore) => {
+      return gridStore.read();
+    });
+  }
+
+  getFileLocation(config, request, filename) {
+    return (request.protocol + '://' + request.get('host') +
+    Path.dirname(request.originalUrl) + '/' + config.applicationId +
     '/' + encodeURIComponent(filename));
+  }
 }
 
-module.exports = {
-  create: create,
-  get: get,
-  location: location
-};
+export default GridStoreAdapter;