[Feature] When no exif timestamp, select filename as timestamp source if corresponding to a pattern

The feature

Issue

I have a lot of photos coming from whatsapp, and they are not storing exif data.

Because of that miss, immich fallback on the file creation date.

Feature request

It would be nice to fallback first on the file name if it respect a pattern (that is done by a lot of apps, like facebook, whatsapp, android camera, ...). Also, having multiple patterns would be awesome, even more if it's customizable (env vars at least).

Here is for whatsapp a regex as an example: (VID|IMG)-(?<year>\d{4})(?<month>\d{2})(?<day>\d{2})-WA\d+. That will match and retrieve the year, month and day. If not matching, then fallback as usual using the file creation date.

_I did not find an explicit feature request of this. Feel free to close/link to other discussions_

Platform

• Server
• Web
• Mobile