Add a dedicated UI to collaboration

[danilo04]

Currently, only iOS and Web have a dedicated UI while Android and macOS uses the tag field to add a collaborator.

Internal link for desgin specification: pd8BQf-ai-p2
Internal link for project: p2XJRt-3i1-p2

What

Add a UI to add and remove collaborators from notes.

Why

Feature parity with iOS client.

How

Tasks

• Refactor Tag Management in NoteEditorFragment and add new behavior #1478
• Add Collaborators UI. This includes: list of collaborators and add Collaborator dialog. #1479
• Refactor tags views to filter out collaborators. This includes: TagsActivity and the list of tags shown on the left panel menu. #1480
• Add note shared indicator in notes list #1496
• Improvements to Collaboration UI #1508

Details:

• Any collaborator may only see collaborators they themselves have added.
• If a collaborator trashes the note:
  • All collaborators added by them including themselves are removed from the note.
  • Restoring the note does not restore collaborators.
    *.Restoring the note does not restore themselves as a collaborator to the owner’s note.
• If the collaborator (User A) removes another collaborator (User B) then:
  • User B still sees the note in their note list.
  • The note is no longer a collaborative note and changes will not be synced with the master note.
• If a note is published, it does not appear as published for collaborators and may be published independently by them.
• Currently, on Android, it is possible to add a collaborator by adding their email as a tag on the note. We should keep this functionality with some small changes to the way in which is behaves.
  • Email tags are “consumed”, once added they disappear from the tags field.
  • A toast verifies that the email was added as a collaborator.
  • Email tags do not appear in the tags list.
• To help differentiate between a normal note and a collaborative note, a collaboration status indicator has been added to the designs.

Collaboration flow: