Add conversations to individual pickups

[nicksellen]

No description provided.

[tiltec]

This seems relevant because people requested a feature where they can notify their group about spontaneous cancellation of pickups. To fulfill this, the pickup conversations should be readable and writable by all group members, but only pickup collectors should be notified by default about new messages.

[tiltec]

Bruno from Solikyl requested this feature recently:

We have pickups when we need more intense communication and that is unfortunately not available yet on Karrot, for example when we have big pickups and need to coordinate people loading cars in one place and people helping offload in other places, or when we have spontaneous pickups that require quick action. For now it's usually one of us calling around, but I know you have discussed features like conversations for the pickups. That, combined with push notifications, might do the job in the future. I just wanted to bring to your attention that this is a much needed feature at Solikyl and probably in any other foodsaving collective that is growing in size and activity.

[nicksellen]

Ok, I added a backend implementation. The frontend is a much bigger topic though. It might make sense to built it on top of #855. Or maybe not.

[tiltec]

Cool! I'd like to have that Slack-style interface for this (#683 ). #855 seems also nice, but I don't like the chat floater so much (and it's a desktop-only optimization, whereas karrot should maybe get more mobile focused).

[nicksellen]

So it might be a sidebar thing like the slack thread UI will work well here. On desktop it would sort of sit over the top, and on mobile be a full page.

[nicksellen]

Here's a quick idea. It's the existing <Conversation> component (reversed) put inside a <QLayoutDrawer> on the right:

[nicksellen]

[edit: moved to PR thread...]

[tiltec]

Done :)