rewrote ImageRouter

- introduced UploadProvider interface
- rewrote all current UploadProviders

Signed-off-by: Philip Molares <philip.molares@udo.edu>
Signed-off-by: David Mehren <dmehren1@gmail.com>

lib/web/imageRouter/imgur.ts

@@ -0,0 +1,30 @@
+import imgur from 'imgur'
+
+import { config } from '../../config'
+import { logger } from '../../logger'
+import { UploadProvider } from './index'
+
+const ImgurUploadProvider: UploadProvider = {
+  uploadImage: (imagePath, callback) => {
+    if (!callback || typeof callback !== 'function') {
+      logger.error('Callback has to be a function')
+      return
+    }
+
+    if (!imagePath) {
+      callback(new Error('Image path is missing or wrong'), undefined)
+      return
+    }
+
+    imgur.setClientId(config.imgur.clientID)
+    imgur.uploadFile(imagePath)
+      .then(function (json) {
+        logger.debug(`SERVER uploadimage success: ${JSON.stringify(json)}`)
+        callback(null, json.data.link.replace(/^http:\/\//i, 'https://'))
+      }).catch(function (err) {
+        callback(new Error(err), undefined)
+      })
+  }
+}
+
+export { ImgurUploadProvider }