Restricted visibility levels - bug fix and new feature
This allows admin users to override restricted visibility settings when creating and updating projects and snippets, and moves the restricted visibility configuration from gitlab.yml to the web UI. See #1903.
## Move configuration location
I added a new section to the application settings page for restricted visibility levels. Each level has a checkbox, styled with Bootstrap to look like a toggle button. A checked box means that the level is restricted. I added a glowing text shadow and changed the background color for checked buttons because the default styles made it hard to distinguish between checked and unchecked. This image shows the new section with the "Public" box checked:

## Allow admins to override
To allow admin users to override the restricted visibility levels, I had to remove the `visibility_level` validation from the `Project` class. The model doesn't know about the `current_user`, which should determine whether the restrictions can be overridden. We could use the creator in the validation, but that wouldn't work correctly for projects where a non-admin user is the creator and an admin tries to change the project to a restricted visibility level.
The `Project::UpdateService` and `Project::CreateService` classes already had code to determine whether the current user is allowed to use a given visibility level; now all visibility level validation is done in those classes. Currently, when a non-admin tries to create or update a project using a restricted level, these classes silently set the visibility level to the global default (create) or the project's existing value (update). I changed this behavior to be more like an Active Model validation, where using a restricted level causes the entire request to be rejected.
Project and personal snippets didn't have service classes, and restricted visibility levels weren't being enforced in the model or the controllers. The UI disabled radio buttons for restricted levels, but that wouldn't be difficult to circumvent. I created the `CreateSnippetService` and `UpdateSnippetService` classes to do the same restricted visibility check that the project classes do. And since I was dealing with snippet visibility levels, I updated the API endpoints for project snippets to allow users to set and update the visibility level.
## TODO
* [x] Add more tests for restricted visibility functionality
cc @sytse @dzaporozhets
See merge request !1655
It is same search like we have at issues page. It allows to quickly
filter merge requests based on title or desription. I copy-pasted some
js code from Issues.js. In future search (filtering) logic should be
refactoed into one class for merge requests and issues
Add new service classes to create and update project and personal
snippets. These classes are responsible for enforcing restricted
visibility settings for non-admin users.
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
Fix server error when editing a note to "+1" or "-1"
### Summary
If a user edits a comment with "+1" or "-1" in the beginning, the POST returns an Internal Server error. (issue #1151). This merge request resolves that error.
### Steps to reproduce
1. Comment on an issue with "Test comment".
2. Edit the issue.
3. Write "+1" and click "Save Comment".
### Expected behavior
The edited note should be saved and refreshed. Any previous upvotes/downvotes from the user should contain a strikethrough.
### Observed behavior
Internal Error
### Relevant logs
```
Started PUT "/avocode/avocode-manager/notes/4996" for 185.33.136.107 at 2015-02-28 17:11:53 +0100
Processing by Projects::NotesController#update as JS
Parameters: {"utf8"=>"✓", "authenticity_token"=>"*removed*", "note"=>{"note"=>"+1\r\n\r\nYes"}, "commit"=>"Save Comment", "project_id"=>"avocode/avocode-manager", "id"=>"4996"}
Completed 500 Internal Server Error in 86ms
ActionView::Template::Error (undefined method `each' for nil:NilClass):
28: %span.note-last-update
29: = note_timestamp(note)
30:
31: - if note.superceded?(@notes)
32: - if note.upvote?
33: %span.vote.upvote.label.label-gray.strikethrough
34: %i.fa.fa-thumbs-up
app/models/note.rb:495:in `superceded?'
app/views/projects/notes/_note.html.haml:31:in `_app_views_projects_notes__note_html_haml___812277000516355462_69988235638820'
app/controllers/projects/notes_controller.rb:71:in `note_to_html'
app/controllers/projects/notes_controller.rb:103:in `render_note_json'
app/controllers/projects/notes_controller.rb:39:in `block (2 levels) in update'
app/controllers/projects/notes_controller.rb:38:in `update'
```
### Fix
It turns out no tests were present for the "Edit Issue" functionality. I added spinach tests to exercise this and reproduced the error.
Most of the routes in `notes_controller.rb` appear to render all notes for the given discussion. `_form.html.haml` needs the full list of notes commented by the user to add strikethroughs for older upvotes/downvotes. However, only the `index` route appeared to obtain this information. The fix is to add a `before_filter` to obtain all the user's notes beforehand, except in the delete case where this information is not needed.
Things to watch: `NotesFinder` needs `target_type` and `target_id` to determine what to do. I'm not sure if there is a conscious effort to phase these keywords out in favor of `noteable_type` and `noteable_id`.
See merge request !360
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.
Irker is a gateway which sends IRC messages on git updates. This new
service provides an interface to this gateway, integrated in Gitlab, for
each updates.
As per the guidelines, this commit adds the new feature in the
CHANGELOG, tests and documentation.
See http://www.catb.org/esr/irker/