function monitorUpload()

in storage-next/upload-files.js [135:175]

• 30 lines of code
• 3 McCabe index (conditional complexity)

function monitorUpload(file) {
  // [START storage_monitor_upload]
  const { getStorage, ref, uploadBytesResumable, getDownloadURL } = require("firebase/storage");

  const storage = getStorage();
  const storageRef = ref(storage, 'images/rivers.jpg');

  const uploadTask = uploadBytesResumable(storageRef, file);

  // Register three observers:
  // 1. 'state_changed' observer, called any time the state changes
  // 2. Error observer, called on failure
  // 3. Completion observer, called on successful completion
  uploadTask.on('state_changed', 
    (snapshot) => {
      // Observe state change events such as progress, pause, and resume
      // Get task progress, including the number of bytes uploaded and the total number of bytes to be uploaded
      const progress = (snapshot.bytesTransferred / snapshot.totalBytes) * 100;
      console.log('Upload is ' + progress + '% done');
      switch (snapshot.state) {
        case 'paused':
          console.log('Upload is paused');
          break;
        case 'running':
          console.log('Upload is running');
          break;
      }
    }, 
    (error) => {
      // Handle unsuccessful uploads
    }, 
    () => {
      // Handle successful uploads on complete
      // For instance, get the download URL: https://firebasestorage.googleapis.com/...
      getDownloadURL(uploadTask.snapshot.ref).then((downloadURL) => {
        console.log('File available at', downloadURL);
      });
    }
  );
  // [END storage_monitor_upload]
}