Newpipe: Video already in playlist (duplicate entry)

[EliasKomar]

Describe the feature you want

It would be nice to be alerted when trying to add a video to a playlist that the playlist already contains.

Is your feature request related to a problem? Please describe it

Additional context

How will you/everyone benefit from this feature?

It prevents you from accidentally adding a video to a playlist twice. Especially helpful for long playlists.

Edit: adding keywords for searching: duplicate/entry/entries/playlist/playlists/videos

[opusforlife2]

Closing #1473 in favour of this. Alerting the user seems more useful than removing after the fact.

[ahmad-abdelbaset]

Hi, I would like to work on this issue as a part of my project for Master Degree course (Software Construction), I discussed it with my instructor @atamrawi

[Stypox]

@ahmad-abdelbaset great! Go for it, nobody else has taken it up so far. Thank you :-)

[ShareASmile]

@Stypox I think there should { or would be great } to have an option to Both

1. {disallow adding twice the same video to a list}
2. and {to batch remove all previous duplicates} from video playlists.

As Batch remove duplicates from playlist would greatly help in eliminating duplicates from prevously made playlists by users (especially longer ones) from which manual removal is most difficult.
.. discussion from #1473

[Stypox]

@ShareASmile @ahmad-abdelbaset yeah, I agree, there should be:

• a new "Remove duplicates" button in the local playlist page's three-dot menu (i.e. in the same place as "Remove watched")
• a small indicator next to each local playlist in the "Add to playlist" dialog meaning that the stream being added is already in there
• a confim dialog that opens when a user tries to add a stream to a local playlist that already contains it

[ahmad-abdelbaset]

Thank you @Stypox and @ShareASmile, it is really good idea, I will own this one.
@atamrawi