I'm coding an extension that downloads items with specific names. Currently, I have two types of items to download:

• Items that have the link to the file URL, so it can be directly downloaded and its name determined by chrome.downloads.download (type A)
• Items that don't have the link to the file URL, and had to be downloaded via a direct download link. The download process has to be initiated separately and its file name changed with chrome.downloads.onDeterminingFilename.addListener (type B)

The problem is chrome.downloads.onDeterminingFilename.addListener interfere with all downloads regardless of the parameters set. I want it only to change the filename when the type B item is downloaded.

Basic rundown of my code

chrome.downloads.download({ //type A items
      url: item.imageLink, //set linkURL
      filename: setName //set name
    });
//item will be downloaded with *setName*
chrome.downloads.onDeterminingFilename.addListener((downloadItem, suggest) => { //type B items
//item will be intercepted, its name being its original filename
  if (item != null && item.type == "B" && downloadItem.url == item.imageLink) { //check linkURL
    suggest({filename: setName, conflictAction: "uniquify"}); //item's filename will be changed to *setName*
  }  
});

Unless I remove the chrome.downloads.onDeterminingFilename completely, the file downloaded will be its original filename regardless of what type it is.

I thought of 3 possible solutions:

1. Brute force the chrome.downloads.onDeterminingFilename, make it change the name of every item downloaded.

• Problem: it'll mess up other downloads, including those from other extensions

2. Remove chrome.downloads.onDeterminingFilename when it's not type B items, and add it in when it is.

• Problem: no guarantee when it will be removed to not interfere with other items being downloaded simultaneously when it's running

3. Figure out how to download type B items without using chrome.downloads.onDeterminingFilename

• Problem: I've tried it, I've found nothing on converting direct download links to fileURLs, especially if the direct download link is generated uniquely

Any other suggestions or am I doing this all wrong?