added loading, hashing, and encrypting events for uploader; decrypting and hashing events for the downloader

frontend/src/download.js

@@ -34,6 +34,24 @@ $(document).ready(function() {
       }
     });
 
+    fileReceiver.on('decrypting', isStillDecrypting => {
+      // The file is being decrypted
+      if (isStillDecrypting) {
+        console.log('Decrypting')
+      } else {
+        console.log('Done decrypting')
+      }
+    })
+
+    fileReceiver.on('hashing', isStillHashing => {
+      // The file is being hashed to make sure a malicious user hasn't tampered with it
+      if (isStillHashing) {
+        console.log('Checking file integrity')
+      } else {
+        console.log('Integrity check done')
+      }
+    })
+
     fileReceiver
       .download()
       .catch(() => {