# What this PR does
Reworks Slack handlers for buttons and select menus for AG Slack
messages.
<img width="602" alt="Screenshot 2023-05-31 at 19 34 05"
src="https://github.com/grafana/oncall/assets/20116910/857bf096-7bdd-427b-94b6-15aad873a8ac">
## Current implementation
- It's possible to end up with orphaned Slack messages that are posted
to Slack but have no `SlackMessage` instance in the DB. For such
messages, clicking buttons will result in an exception and HTTP 500. See
private repo
[issue](https://github.com/grafana/oncall-private/issues/1841) for more
info.
- Bug in authorization system, which effectively bypasses any permission
checks. For example, it's possible to resolve an alert group while being
a Viewer.
- No tests covering most buttons.
## Changes in this PR
- Make the system more robust, don't use `SlackMessage` model to figure
out the alert group being interacted on, instead embed `alert_group_pk`
to every button and use it when receiving interaction requests from
Slack.
- Existing orphaned Slack messages will be repaired. Clicking buttons
under orphaned messages will work (and missing `SlackMessage` instance
will be created on interaction). This is possible because some buttons
already have `alert_group_pk` embedded, and it's possible to get this
data on button clicks (even if the clicked button itself doesn't have
`alert_group_pk` embedded).
- Fix authorization. Show warning window when unauthorized:
<img width="511" alt="Screenshot 2023-05-31 at 19 40 02"
src="https://github.com/grafana/oncall/assets/20116910/5abeeaa7-1b61-4a47-b3af-0e21d5cd1907">
- Added tests for all the buttons under AG message. Add tests checking
authorization, actual execution of scenario steps, orphan message
repairing, backward compatibility, etc. Also add tests on
`AlertGroupSlackRenderer` checking that correct data is embedded into
buttons.
- Cosmetic changes such as renaming `incident` to `Alert Group`.
## Which issue(s) this PR fixes
Related to https://github.com/grafana/oncall-private/issues/1841
## Checklist
- [x] Unit, integration, and e2e (if applicable) tests updated
- [x] Documentation added (or `pr:no public docs` PR label added if not
required)
- [x] `CHANGELOG.md` updated (or `pr:no changelog` PR label added if not
required)
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