APIv4 post /channels/ids (#5845)

* APIv4 post /channels/ids

* updated enpoint as /teams/{team_id}/channels/ids

3 files changed, 132 insertions, 0 deletions

diff --git a/store/sql_channel_store.go b/store/sql_channel_store.go
index d72722f7c..309337e50 100644
--- a/store/sql_channel_store.go
+++ b/store/sql_channel_store.go
@@ -619,6 +619,56 @@ func (s SqlChannelStore) GetPublicChannelsForTeam(teamId string, offset int, lim
 	return storeChannel
 }
 
+func (s SqlChannelStore) GetPublicChannelsByIdsForTeam(teamId string, channelIds []string) StoreChannel {
+	storeChannel := make(StoreChannel, 1)
+
+	go func() {
+		result := StoreResult{}
+
+		props := make(map[string]interface{})
+		props["teamId"] = teamId
+
+		idQuery := ""
+
+		for index, channelId := range channelIds {
+			if len(idQuery) > 0 {
+				idQuery += ", "
+			}
+
+			props["channelId"+strconv.Itoa(index)] = channelId
+			idQuery += ":channelId" + strconv.Itoa(index)
+		}
+
+		data := &model.ChannelList{}
+		_, err := s.GetReplica().Select(data,
+			`SELECT
+			    *
+			FROM
+			    Channels
+			WHERE
+			    TeamId = :teamId
+					AND Type = 'O'
+					AND DeleteAt = 0
+					AND Id IN (`+idQuery+`)
+			ORDER BY DisplayName`,
+			props)
+
+		if err != nil {
+			result.Err = model.NewLocAppError("SqlChannelStore.GetPublicChannelsByIdsForTeam", "store.sql_channel.get_channels_by_ids.get.app_error", nil, err.Error())
+		}
+
+		if len(*data) == 0 {
+			result.Err = model.NewAppError("SqlChannelStore.GetPublicChannelsByIdsForTeam", "store.sql_channel.get_channels_by_ids.not_found.app_error", nil, "", http.StatusNotFound)
+		}
+
+		result.Data = data
+		storeChannel <- result
+		close(storeChannel)
+	}()
+
+	return storeChannel
+}
+
 type channelIdWithCountAndUpdateAt struct {
 	Id            string
 	TotalMsgCount int64
diff --git a/store/sql_channel_store_test.go b/store/sql_channel_store_test.go
index f347fa438..3cc6f3bc4 100644
--- a/store/sql_channel_store_test.go
+++ b/store/sql_channel_store_test.go
@@ -934,6 +934,87 @@ func TestChannelStoreGetPublicChannelsForTeam(t *testing.T) {
 	}
 }
 
+func TestChannelStoreGetPublicChannelsByIdsForTeam(t *testing.T) {
+	Setup()
+
+	teamId1 := model.NewId()
+
+	oc1 := model.Channel{}
+	oc1.TeamId = teamId1
+	oc1.DisplayName = "OpenChannel1Team1"
+	oc1.Name = "a" + model.NewId() + "b"
+	oc1.Type = model.CHANNEL_OPEN
+	Must(store.Channel().Save(&oc1))
+
+	oc2 := model.Channel{}
+	oc2.TeamId = model.NewId()
+	oc2.DisplayName = "OpenChannel2TeamOther"
+	oc2.Name = "a" + model.NewId() + "b"
+	oc2.Type = model.CHANNEL_OPEN
+	Must(store.Channel().Save(&oc2))
+
+	pc3 := model.Channel{}
+	pc3.TeamId = teamId1
+	pc3.DisplayName = "PrivateChannel3Team1"
+	pc3.Name = "a" + model.NewId() + "b"
+	pc3.Type = model.CHANNEL_PRIVATE
+	Must(store.Channel().Save(&pc3))
+
+	cids := []string{oc1.Id}
+	cresult := <-store.Channel().GetPublicChannelsByIdsForTeam(teamId1, cids)
+	list := cresult.Data.(*model.ChannelList)
+
+	if len(*list) != 1 {
+		t.Fatal("should return 1 channel")
+	}
+
+	if (*list)[0].Id != oc1.Id {
+		t.Fatal("missing channel")
+	}
+
+	cids = append(cids, oc2.Id)
+	cids = append(cids, model.NewId())
+	cids = append(cids, pc3.Id)
+	cresult = <-store.Channel().GetPublicChannelsByIdsForTeam(teamId1, cids)
+	list = cresult.Data.(*model.ChannelList)
+
+	if len(*list) != 1 {
+		t.Fatal("should return 1 channel")
+	}
+
+	oc4 := model.Channel{}
+	oc4.TeamId = teamId1
+	oc4.DisplayName = "OpenChannel4Team1"
+	oc4.Name = "a" + model.NewId() + "b"
+	oc4.Type = model.CHANNEL_OPEN
+	Must(store.Channel().Save(&oc4))
+
+	cids = append(cids, oc4.Id)
+	cresult = <-store.Channel().GetPublicChannelsByIdsForTeam(teamId1, cids)
+	list = cresult.Data.(*model.ChannelList)
+
+	if len(*list) != 2 {
+		t.Fatal("should return 2 channels")
+	}
+
+	if (*list)[0].Id != oc1.Id {
+		t.Fatal("missing channel")
+	}
+
+	if (*list)[1].Id != oc4.Id {
+		t.Fatal("missing channel")
+	}
+
+	cids = cids[:0]
+	cids = append(cids, model.NewId())
+	cresult = <-store.Channel().GetPublicChannelsByIdsForTeam(teamId1, cids)
+	list = cresult.Data.(*model.ChannelList)
+
+	if len(*list) != 0 {
+		t.Fatal("should not return a channel")
+	}
+}
+
 func TestChannelStoreGetChannelCounts(t *testing.T) {
 	Setup()
 
diff --git a/store/store.go b/store/store.go
index 323727697..528b26a3f 100644
--- a/store/store.go
+++ b/store/store.go
@@ -103,6 +103,7 @@ type ChannelStore interface {
 	GetChannels(teamId string, userId string) StoreChannel
 	GetMoreChannels(teamId string, userId string, offset int, limit int) StoreChannel
 	GetPublicChannelsForTeam(teamId string, offset int, limit int) StoreChannel
+	GetPublicChannelsByIdsForTeam(teamId string, channelIds []string) StoreChannel
 	GetChannelCounts(teamId string, userId string) StoreChannel
 	GetTeamChannels(teamId string) StoreChannel
 	GetAll(teamId string) StoreChannel