Allow Member.add_user to handle access requesters

Changes include:

- Ensure Member.add_user is not called directly when not necessary
- New GroupMember.add_users_to_group to have the same abstraction level as for Project
- Refactor Member.add_user to take a source instead of an array of members
- Fix Rubocop offenses
- Always use Project#add_user instead of project.team.add_user
- Factorize users addition as members in Member.add_users_to_source
- Make access_level a keyword argument in GroupMember.add_users_to_group and ProjectMember.add_users_to_projects
- Destroy any requester before adding them as a member
- Improve the way we handle access requesters in Member.add_user
  Instead of removing the requester and creating a new member,
  we now simply accepts their access request. This way, they will
  receive a "access request granted" email.
- Fix error that was previously silently ignored
- Stop raising when access level is invalid in Member, let Rails validation do their work

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

1 files changed, 10 insertions, 4 deletions

diff --git a/app/models/project_team.rb b/app/models/project_team.rb
index d9ce5088903..79d041d2775 100644
--- a/app/models/project_team.rb
+++ b/app/models/project_team.rb
@@ -33,18 +33,24 @@ class ProjectTeam
     member
   end
 
-  def add_users(users, access, current_user: nil, expires_at: nil)
+  def add_users(users, access_level, current_user: nil, expires_at: nil)
     ProjectMember.add_users_to_projects(
       [project.id],
       users,
-      access,
+      access_level,
       current_user: current_user,
       expires_at: expires_at
     )
   end
 
-  def add_user(user, access, current_user: nil, expires_at: nil)
-    add_users([user], access, current_user: current_user, expires_at: expires_at)
+  def add_user(user, access_level, current_user: nil, expires_at: nil)
+    ProjectMember.add_user(
+      project,
+      user,
+      access_level,
+      current_user: current_user,
+      expires_at: expires_at
+    )
   end
 
   # Remove all users from project team