Applying mime wrapper fix to avoid Angular CLI project build breaks (#…

…1686)

* Applying mime wrapper fix to avoid Angular CLI project build breaks

* Code formatting

* Code formatting

* Add license

packages/core/src/sagas/sendFilesToPostActivitySaga.js

@@ -3,7 +3,7 @@ import {
   takeEvery
 } from 'redux-saga/effects';
 
-import mime from 'mime';
+import mime from '../utils/mime-wrapper';
 
 import whileConnected from './effects/whileConnected';
 

packages/core/src/utils/mime-wrapper.js

@@ -0,0 +1,40 @@
+// We adopted the work from mime-wrapper, at https://github.com/marlon360/mime-wrapper.
+
+// This file wraps the mime library constructor to include '.json' types. This is needed
+// to support Angular CLI web projects, in which the webpack.config files are hidden away
+// from the user, and do not support .json file extension module resolutions.
+//
+// Refer to issue https://github.com/jshttp/mime-types/issues/50#issuecomment-390932678
+// and issue https://github.com/broofa/node-mime/issues/208.
+//
+// This file may need to change if the mime library is bumped a major that may cause a
+// breaking change, as it relies on the internal library file placement.
+
+// MIT License
+// 
+// Copyright (c) 2018 Marlon Lückert
+// 
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+// 
+// The above copyright notice and this permission notice shall be included in all
+// copies or substantial portions of the Software.
+// 
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+// SOFTWARE.
+
+import Mime from 'mime/Mime';
+
+export default new Mime(
+  require('mime/types/standard.json'), 
+  require('mime/types/other.json')
+)