Differences between checkForExistingDownloads and ensureDownloadsAreRunning?

[felipegmg]

Hi! Im in doubt which method i must use. In documentation, the "check" method is used as a preparation of "ensure" method, but in the same times, the documentation has said that those two methods are used to resume a download. So, my question is: Can I use only the checkForExistingDownloads to resume a download, in view of "ensure" method can only been used in iOS devices. Tks a Lot!

[kesha-antonov]

Hi

As you can see here:

react-native-background-downloader/index.ts

Lines 95 to 105 in 1f52afe

	export function ensureDownloadsAreRunning () {
	log('[RNBackgroundDownloader] ensureDownloadsAreRunning')
	return checkForExistingDownloads()
	.then(tasks => {
	for (const task of tasks)
	if (task.state === 'DOWNLOADING') {
	task.pause()
	task.resume()
	}
	})
	}

ensureDownloadsAreRunning is just wrapper around checkForExistingDownloads to get tasks and call pause & resume on them to ensure they're running. It's good to call this method when app resumed from background - in case when you have problem when downloads stuck sometimes.

So you don't need to call checkForExistingDownloads as a preparation

[kesha-antonov]

checkForExistingDownloads is good to use on app startup when you want to re-attach those tasks to your app logic