Adds the endpoints and store logic to get groups by team and by channel (#10502)

* Adds the endpoints and store logic to get groups by team and by channel

* Remove TODO comments

* Fix unit tests

app/group.go

@@ -164,3 +164,19 @@ func (a *App) ChannelMembersToRemove() ([]*model.ChannelMember, *model.AppError)
 	}
 	return result.Data.([]*model.ChannelMember), nil
 }
+
+func (a *App) GetGroupsByChannel(channelId string, page, perPage int) ([]*model.Group, *model.AppError) {
+	result := <-a.Srv.Store.Group().GetGroupsByChannel(channelId, page, perPage)
+	if result.Err != nil {
+		return nil, result.Err
+	}
+	return result.Data.([]*model.Group), nil
+}
+
+func (a *App) GetGroupsByTeam(teamId string, page, perPage int) ([]*model.Group, *model.AppError) {
+	result := <-a.Srv.Store.Group().GetGroupsByTeam(teamId, page, perPage)
+	if result.Err != nil {
+		return nil, result.Err
+	}
+	return result.Data.([]*model.Group), nil
+}

app/group_test.go

@@ -197,3 +197,55 @@ func TestDeleteGroupSyncable(t *testing.T) {
 	require.NotNil(t, err)
 	require.Nil(t, gs)
 }
+
+func TestGetGroupsByChannel(t *testing.T) {
+	th := Setup(t).InitBasic()
+	defer th.TearDown()
+	group := th.CreateGroup()
+
+	// Create a group channel
+	groupSyncable := &model.GroupSyncable{
+		GroupId:    group.Id,
+		AutoAdd:    false,
+		SyncableId: th.BasicChannel.Id,
+		Type:       model.GroupSyncableTypeChannel,
+	}
+
+	gs, err := th.App.CreateGroupSyncable(groupSyncable)
+	require.Nil(t, err)
+	require.NotNil(t, gs)
+
+	groups, err := th.App.GetGroupsByChannel(th.BasicChannel.Id, 0, 60)
+	require.Nil(t, err)
+	require.ElementsMatch(t, []*model.Group{group}, groups)
+
+	groups, err = th.App.GetGroupsByChannel(model.NewId(), 0, 60)
+	require.Nil(t, err)
+	require.Empty(t, groups)
+}
+
+func TestGetGroupsByTeam(t *testing.T) {
+	th := Setup(t).InitBasic()
+	defer th.TearDown()
+	group := th.CreateGroup()
+
+	// Create a group team
+	groupSyncable := &model.GroupSyncable{
+		GroupId:    group.Id,
+		AutoAdd:    false,
+		SyncableId: th.BasicTeam.Id,
+		Type:       model.GroupSyncableTypeTeam,
+	}
+
+	gs, err := th.App.CreateGroupSyncable(groupSyncable)
+	require.Nil(t, err)
+	require.NotNil(t, gs)
+
+	groups, err := th.App.GetGroupsByTeam(th.BasicTeam.Id, 0, 60)
+	require.Nil(t, err)
+	require.ElementsMatch(t, []*model.Group{group}, groups)
+
+	groups, err = th.App.GetGroupsByTeam(model.NewId(), 0, 60)
+	require.Nil(t, err)
+	require.Empty(t, groups)
+}