Partially addresses #47424.

Right now, it once  a chat notifacation service has been enabled, there
is no way to limit the branches which trigger a notification. Instead of
allowing the user to specify the list, I opted to let the user check the
box if they'd only want to be notified of the default branch.

Tags are uneffected by this change.

Also add Service#event_names so that we don't have to hard code all
event names in ServiceParams. Note that I don't know why we want to
call plural on issue_event and merge_request_event so that we still
need to hard code them for issues_event and merge_requests_event.
See app/helpers/services_helper.rb for those special rules.

This reverts commit 3e991230.

# Conflicts:
#	app/models/project.rb

In 8278b763 the default behaviour of annotation
has changes, which was causing a lot of noise in diffs. We decided in #17382
that it is better to get rid of the whole annotate gem, and instead let people
look at schema.rb for the columns in a table.

Fixes: #17382

Signed-off-by: Rémy Coutable <remy@rymai.me>

update changelog

When setting up the service I was not sure which webhook I should use, by adding
this Help text I hope we can help people in the future with setting up this hook

Signed-off-by: Jeroen van Baarsen <jeroenvanbaarsen@gmail.com>

Normalize output to use:
- User name instead of username
- Include first line of title in message description
- Link to "Issue #X" instead of "#X"

Supports four different event types all bundled under the "note" event type:

- comments on a commit
- comments on an issue
- comments on a merge request
- comments on a code snippet

Stan Hu authored 10 years ago and Douwe Maan committed 10 years ago

1) Adds a DB migration for all services to toggle on push, issue, and merge events.

2) Upon an issue or merge request event, fire service hooks.

3) Slack service supports custom messages for each of these events. Other services
not supported at the moment.

4) Label merge request hooks with their corresponding actions.