There were a couple of issues on how we handle pinned messages:
1) Clock of the message was only checked when saving, meaning that the
client would receive potentially updates that were not to be
processed.
2) We relied on the client to generate a notification for a pinned
message by sending a normal message through the wire. This PR changes
the behavior so that the notification is generated locally, either on
response to a network event or client event.
3) When deleting a message, we pull all the replies/pinned notifications
and send them over to the client so they know that those messages
needs updating.
This adds a new `DiscordMessageAttachment` type which is part of
`DiscordMessage`. Along with that type, there's also a new database
table for `discord_message_attachments` and corresponding persistence
APIs.
This commit also changes how chat messages are retrieved.
Here's why:
`DiscordMessage` can have multiple `DiscordMessageAttachment`.
A chat message can have a `DiscordMessage`.
Because we're `LEFT JOIN`'ing the discord message attachments into the
chat messages, there's a possibility of multiple rows per message.
Hence, this commit ensures we collect queried discord message
attachments on chat messages.
* add PinMessage and PinnedMessage
* fix gruop pin messages
* add SkipGroupMessageWrap to pin messages
* update pinMessage ID generation to be symmetric
Mikhail Rogachev
Andrea Maria Piana
Pascal Precht
Andrea Franz