Add TeamSync database and API support

Teams can now have a TeamSync entry in the database, indicating how they are synced via an external group. If found, then the user membership of the team cannot be changed via the API.

data/model/team.py

@@ -1,9 +1,13 @@
-from data.database import Team, TeamMember, TeamRole, User, TeamMemberInvite, RepositoryPermission
+import json
+
+from peewee import fn
+
+from data.database import (Team, TeamMember, TeamRole, User, TeamMemberInvite, RepositoryPermission,
+                           TeamSync, LoginService)
 from data.model import (DataModelException, InvalidTeamException, UserAlreadyInTeam,
-                        InvalidTeamMemberException, user, _basequery)
+                        InvalidTeamMemberException, _basequery)
 from data.text import prefix_search
 from util.validation import validate_username
-from peewee import fn, JOIN_LEFT_OUTER
 from util.morecollections import AttrDict
 
 
@@ -369,3 +373,24 @@ def confirm_team_invite(code, user_obj):
   team = found.team
   inviter = found.inviter
   return (team, inviter)
+
+def set_team_syncing(team, login_service_name, config):
+  login_service = LoginService.get(name=login_service_name)
+  TeamSync.create(team=team, transaction_id='', service=login_service, config=json.dumps(config))
+
+def get_team_sync_information(orgname, teamname):
+  """ Returns the team syncing information for the team with the given name under the organization
+      with the given name or None if none.
+  """
+  query = (TeamSync
+           .select(TeamSync, LoginService)
+           .join(Team)
+           .join(User)
+           .switch(TeamSync)
+           .join(LoginService)
+           .where(Team.name == teamname, User.organization == True, User.username == orgname))
+
+  try:
+    return query.get()
+  except TeamSync.DoesNotExist:
+    return None