feat: slack app

[rkreddy99]

trafficstars

What does this PR do?

Create slack app for notifications

Fixes #10683

Loom Video: https://www.loom.com/share/c7761e726ecd4db69116c6fa0f65a128

Type of change

• [x] New feature (non-breaking change which adds functionality)

How should this be tested?

• Create a bot app in slack for messaging
• Install slack in Cal.com by providing valid credentials
• Book a meeting, message should appear in the channel

Mandatory Tasks

• [x] Make sure you have self-reviewed the code. A decent size PR without self-review might be rejected.

Checklist

• I haven't added tests that prove my fix is effective or that my feature works
• I haven't checked if new and existing unit tests pass locally with my changes

/claim #10683

edit - updated the video link

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[rkreddy99]

todo: ~have to move credentials to DB. The attached creds in the PR are fake.~ ~bug - slack is not being showed in the installed apps~

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[rkreddy99]

~working on~

• ~updating the notification content to be sent~
• ~how to use correct slack webhook url when there are multiple installations~

[rkreddy99]

Here's the updated video

https://www.loom.com/share/c7761e726ecd4db69116c6fa0f65a128

cc @PeerRich

[KSSaiTeja]

if the issue still open, please give me a chance to fix the issue

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18 out of 20 committers have signed the CLA.

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[aar2dee2]

Thanks for the PR @rkreddy99 🙏🏼

@hariombalhara request your confirmation for the suggestion below.

After setting up a bot in Slack, I receive notifications for booking created, but not for rescheduled or cancelled. I'd recommend setting up a webhook for each of these events. You can refer to the Make.com integration here on how to setup webhooks.

Also left some comments above.

[rkreddy99]

working on the suggestions

[rkreddy99]

hey @aar2dee2 can we connect on discord for the suggestions, had some doubts

[aar2dee2]

hey @aar2dee2 can we connect on discord for the suggestions, had some doubts

Sure. Accepted your request.

[keithwillcode]

@calcom/consumer lets take this over in 3.8 and push it across the line.

[keithwillcode]

Closing for now until we prio higher in a future release. cc @joeauyeung