Preparing for github file persistence

src/valueObjects/MediaProxy.js

@@ -7,8 +7,21 @@ export default function MediaProxy(value, file, uploaded = false) {
   this.value = value;
   this.file = file;
   this.uploaded = uploaded;
-  this.uri = config.media_folder && !uploaded ? config.media_folder + '/' + value : value;
-  this.toString = function() {
-    return this.uploaded ? this.uri : window.URL.createObjectURL(this.file, { oneTimeOnly: true });
-  };
+  this.sha = null;
+  this.path = config.media_folder && !uploaded ? config.media_folder + '/' + value : value;
 }
+
+MediaProxy.prototype.toString = function() {
+  return this.uploaded ? this.path : window.URL.createObjectURL(this.file, { oneTimeOnly: true });
+};
+
+MediaProxy.prototype.toBase64 = function() {
+  return new Promise((resolve, reject) => {
+    const fr = new FileReader();
+    fr.onload = (readerEvt) => {
+      const binaryString = readerEvt.target.result;
+      resolve(btoa(binaryString));
+    };
+    fr.readAsDataURL(this.file);
+  });
+};