Prior to this fix we would show the message after a round trip to the server. If you had a too long message error, at this point your input would be empty and we would show an error in chat. It's important to have this server side safety net, but we can have a better UX by showing an error on the frontend before sending the message, that way you can correct your message before sending it and not lose it.
Previously the spec could be flakey as the long message could show on the screen while we await for processing. Now we will first check to have the error message on screen, at this point the erroneous message should never be visible.
This commit starts from a simple observation: cooking messages on the hot path can be slow. Especially with a lot of mentions.
To move cooking from the hot path, this commit has made the following changes:
- updating cooked, inserting mentions and notifying user of new mentions has been moved inside the `process_message` job. It happens right after the `Chat::MessageProcessor` run, which is where the cooking happens.
- the similar existing code in `rebake!` has also been moved to rely on the `process_message`job only
- refactored `create_mentions` and `update_mentions` into one single `upsert_mentions` which can be called invariably
- allows services to decide if their job is ran inline or later. It avoids to need to know you have to use `Jobs.run_immediately!` in this case, in tests it will be inline per default
- made various frontend changes to make the chat-channel component lifecycle clearer. we had to handle `did-update @channel` which was super awkward and creating bugs with listeners which the changes of the PR made clear in failing specs
- adds a new `-processed` (and `-not-processed`) class on the chat message, this is made to have a good lifecyle hook in system specs
What is the problem?
We were calling out to methods that calls `has_css?` or `has_selector?`
which returns a boolean. Since we are not using the return value, it
means the methods can be deemed unnecessary. However, we do want those
checks and this commit adds the necessarily assertions to make use of
the return values.
This reverts commit ddf4ecba04.
Causing a flaky test to appear:
```
main $ LOAD_PLUGINS=1 rspec plugins/chat/spec/system/chat/composer/shortcuts/channel_spec.rb
Randomized with seed 17765
.....F..
Failures:
1) Chat | composer | shortcuts | channel when using ArrowUp when last message is staged does not edit a message
Failure/Error: channel_page.send_message
expected `#<PageObjects::Components::Chat::Messages:0x00007fe823ac1710 @context=".chat-channel">.has_message?({:persisted=>true, :text=>"2"})` to be truthy, got false
[Screenshot Image]: /home/tgxworld/work/discourse/tmp/capybara/failures_r_spec_example_groups_chat_composer_shortcuts_channel_when_using_arrow_up_when_last_message_is_staged_does_not_edit_a_message_148.png
```
What is the problem?
We were calling out to methods that calls `has_css?` or `has_selector?`
which returns a boolean. Since we are not using the return value, it
means the methods can be deemed unnecessary. However, we do want those
checks and this commit adds the necessarily assertions to make use of
the return values.
