Files set available offline but deleted on server repeatedly produce notifications

[Whisprin]

Actual behaviour

• When a file which is set as available offline gets deleted from the server a notification is displayed: "the file is no longer available on the server"
• Clicking the notification removes it without further details
• The notification appears again after some time, and again, and again
• Users cannot get rid of the notification permanently

Expected behaviour

When a file which is set available offline gets deleted from the server, the sync should:

• display a notification once
• upon clicking the notification inform the user which file(s) are not available anymore
• update local cache and remove the available offline flag
• not display the notification again

Steps to reproduce

1. Create a parent folder
2. Create a child folder inside the parent
3. Create a file in the child folder
4. Mark the file as offline in the app
5. Delete the child folder server side
6. Do not access the parent folder in the Android app
7. Wait for the offline file sync to occur

• A notification "the file is no longer available on the server" appears
• Click the notification -> it disappears but nothing else happens
• The notification appears again after some time, process repeats even through phone and server restarts etc

• There's no possibility for users to remove the notification permanently unless they know which file has been removed on the server
• The user doesn't learn which file or folder has been removed on the server

Environment data

Android version: 8.0.0

Device model: G8441

Stock or customized system: Stock

Nextcloud app version: 3.3.2 F-Droid

Nextcloud server version: 15.0.0

Logs

Web server error log

[19/Dec/2018:11:23:16 +0100] "GET /remote.php/webdav/<PATH_TO_FILE> HTTP/1.1" 404 278 "-" "Mozilla/5.0 (Android) ownCloud-android/3.3.2"

Logcat

12-19 11:23:15.622 21860 21895 I DownloadRemoteFileOperation: Download of <PATH_TO_FILE> to /storage/2DC5-0BCD/Android/media/com.nextcloud.client/nextcloud/tmp/<USER>@<SERVER>/<PATH_TO_FILE>: Local file does not exist
12-19 11:23:15.622 21860 21895 I DownloadFileOperation: Download of <PATH_TO_FILE> to /storage/2DC5-0BCD/Android/media/com.nextcloud.client/nextcloud/<USER>@<SERVER>/<PATH_TO_FILE>: Local file does not exist

[nextcloud-android-bot]

GitMate.io thinks possibly related issues are #2281 ([Deleted]), #559 (Notifications), #1311 (Allow to delete notifications), #2374 (don't show a notification while keeping files available offline), and #2077 (File no longer available on the server).

[stale]

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