APIv4 post /channels/ids (#5845)

* APIv4 post /channels/ids

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

8 files changed, 259 insertions, 5 deletions

diff --git a/api4/channel.go b/api4/channel.go
index a19f7d858..278bf1d2e 100644
--- a/api4/channel.go
+++ b/api4/channel.go
@@ -19,8 +19,9 @@ func InitChannel() {
 	BaseRoutes.Channels.Handle("/direct", ApiSessionRequired(createDirectChannel)).Methods("POST")
 	BaseRoutes.Channels.Handle("/members/{user_id:[A-Za-z0-9]+}/view", ApiSessionRequired(viewChannel)).Methods("POST")
 
-	BaseRoutes.Team.Handle("/channels", ApiSessionRequired(getPublicChannelsForTeam)).Methods("GET")
-	BaseRoutes.Team.Handle("/channels/search", ApiSessionRequired(searchChannelsForTeam)).Methods("POST")
+	BaseRoutes.ChannelsForTeam.Handle("", ApiSessionRequired(getPublicChannelsForTeam)).Methods("GET")
+	BaseRoutes.ChannelsForTeam.Handle("/ids", ApiSessionRequired(getPublicChannelsByIdsForTeam)).Methods("POST")
+	BaseRoutes.ChannelsForTeam.Handle("/search", ApiSessionRequired(searchChannelsForTeam)).Methods("POST")
 	BaseRoutes.User.Handle("/teams/{team_id:[A-Za-z0-9]+}/channels", ApiSessionRequired(getChannelsForTeamForUser)).Methods("GET")
 
 	BaseRoutes.Channel.Handle("", ApiSessionRequired(getChannel)).Methods("GET")
@@ -322,6 +323,38 @@ func getPublicChannelsForTeam(c *Context, w http.ResponseWriter, r *http.Request
 	}
 }
 
+func getPublicChannelsByIdsForTeam(c *Context, w http.ResponseWriter, r *http.Request) {
+	c.RequireTeamId()
+	if c.Err != nil {
+		return
+	}
+
+	channelIds := model.ArrayFromJson(r.Body)
+	if len(channelIds) == 0 {
+		c.SetInvalidParam("channel_ids")
+		return
+	}
+
+	for _, cid := range channelIds {
+		if len(cid) != 26 {
+			c.SetInvalidParam("channel_id")
+			return
+		}
+	}
+
+	if !app.SessionHasPermissionToTeam(c.Session, c.Params.TeamId, model.PERMISSION_VIEW_TEAM) {
+		c.SetPermissionError(model.PERMISSION_VIEW_TEAM)
+		return
+	}
+
+	if channels, err := app.GetPublicChannelsByIdsForTeam(c.Params.TeamId, channelIds); err != nil {
+		c.Err = err
+		return
+	} else {
+		w.Write([]byte(channels.ToJson()))
+	}
+}
+
 func getChannelsForTeamForUser(c *Context, w http.ResponseWriter, r *http.Request) {
 	c.RequireUserId().RequireTeamId()
 	if c.Err != nil {
diff --git a/api4/channel_test.go b/api4/channel_test.go
index a208313df..3d501b313 100644
--- a/api4/channel_test.go
+++ b/api4/channel_test.go
@@ -6,6 +6,7 @@ package api4
 import (
 	"fmt"
 	"net/http"
+	"sort"
 	"strconv"
 	"testing"
 
@@ -494,6 +495,68 @@ func TestGetPublicChannelsForTeam(t *testing.T) {
 	CheckNoError(t, resp)
 }
 
+func TestGetPublicChannelsByIdsForTeam(t *testing.T) {
+	th := Setup().InitBasic().InitSystemAdmin()
+	defer TearDown()
+	Client := th.Client
+	teamId := th.BasicTeam.Id
+	input := []string{th.BasicChannel.Id}
+	output := []string{th.BasicChannel.DisplayName}
+
+	channels, resp := Client.GetPublicChannelsByIdsForTeam(teamId, input)
+	CheckNoError(t, resp)
+
+	if len(*channels) != 1 {
+		t.Fatal("should return 1 channel")
+	}
+
+	if (*channels)[0].DisplayName != output[0] {
+		t.Fatal("missing channel")
+	}
+
+	input = append(input, GenerateTestId())
+	input = append(input, th.BasicChannel2.Id)
+	input = append(input, th.BasicPrivateChannel.Id)
+	output = append(output, th.BasicChannel2.DisplayName)
+	sort.Strings(output)
+
+	channels, resp = Client.GetPublicChannelsByIdsForTeam(teamId, input)
+	CheckNoError(t, resp)
+
+	if len(*channels) != 2 {
+		t.Fatal("should return 2 channels")
+	}
+
+	for i, c := range *channels {
+		if c.DisplayName != output[i] {
+			t.Fatal("missing channel")
+		}
+	}
+
+	_, resp = Client.GetPublicChannelsByIdsForTeam(GenerateTestId(), input)
+	CheckForbiddenStatus(t, resp)
+
+	_, resp = Client.GetPublicChannelsByIdsForTeam(teamId, []string{})
+	CheckBadRequestStatus(t, resp)
+
+	_, resp = Client.GetPublicChannelsByIdsForTeam(teamId, []string{"junk"})
+	CheckBadRequestStatus(t, resp)
+
+	_, resp = Client.GetPublicChannelsByIdsForTeam(teamId, []string{GenerateTestId()})
+	CheckNotFoundStatus(t, resp)
+
+	_, resp = Client.GetPublicChannelsByIdsForTeam(teamId, []string{th.BasicPrivateChannel.Id})
+	CheckNotFoundStatus(t, resp)
+
+	Client.Logout()
+
+	_, resp = Client.GetPublicChannelsByIdsForTeam(teamId, input)
+	CheckUnauthorizedStatus(t, resp)
+
+	_, resp = th.SystemAdminClient.GetPublicChannelsByIdsForTeam(teamId, input)
+	CheckNoError(t, resp)
+}
+
 func TestGetChannelsForTeamForUser(t *testing.T) {
 	th := Setup().InitBasic().InitSystemAdmin()
 	defer TearDown()
diff --git a/app/channel.go b/app/channel.go
index 51688ad87..5278abbfe 100644
--- a/app/channel.go
+++ b/app/channel.go
@@ -676,6 +676,14 @@ func GetChannelsUserNotIn(teamId string, userId string, offset int, limit int) (
 	}
 }
 
+func GetPublicChannelsByIdsForTeam(teamId string, channelIds []string) (*model.ChannelList, *model.AppError) {
+	if result := <-Srv.Store.Channel().GetPublicChannelsByIdsForTeam(teamId, channelIds); result.Err != nil {
+		return nil, result.Err
+	} else {
+		return result.Data.(*model.ChannelList), nil
+	}
+}
+
 func GetPublicChannelsForTeam(teamId string, offset int, limit int) (*model.ChannelList, *model.AppError) {
 	if result := <-Srv.Store.Channel().GetPublicChannelsForTeam(teamId, offset, limit); result.Err != nil {
 		return nil, result.Err
diff --git a/i18n/en.json b/i18n/en.json
index d16a288da..a48cc2cb0 100644
--- a/i18n/en.json
+++ b/i18n/en.json
@@ -4708,6 +4708,14 @@
     "translation": "No channels were found"
   },
   {
+    "id": "store.sql_channel.get_channels_by_ids.get.app_error",
+    "translation": "We couldn't get the channels"
+  },
+  {
+    "id": "store.sql_channel.get_channels_by_ids.not_found.app_error",
+    "translation": "No channel found"
+  },
+  {
     "id": "store.sql_channel.get_deleted_by_name.existing.app_error",
     "translation": "We couldn't find the existing deleted channel"
   },
diff --git a/model/client4.go b/model/client4.go
index 19d4a9a00..031973a34 100644
--- a/model/client4.go
+++ b/model/client4.go
@@ -98,7 +98,7 @@ func (c *Client4) GetChannelsRoute() string {
 	return fmt.Sprintf("/channels")
 }
 
-func (c *Client4) GetPublicChannelsForTeamRoute(teamId string) string {
+func (c *Client4) GetChannelsForTeamRoute(teamId string) string {
 	return fmt.Sprintf(c.GetTeamRoute(teamId) + "/channels")
 }
 
@@ -962,7 +962,17 @@ func (c *Client4) GetChannelStats(channelId string, etag string) (*ChannelStats,
 // GetPublicChannelsForTeam returns a list of public channels based on the provided team id string.
 func (c *Client4) GetPublicChannelsForTeam(teamId string, page int, perPage int, etag string) (*ChannelList, *Response) {
 	query := fmt.Sprintf("?page=%v&per_page=%v", page, perPage)
-	if r, err := c.DoApiGet(c.GetPublicChannelsForTeamRoute(teamId)+query, etag); err != nil {
+	if r, err := c.DoApiGet(c.GetChannelsForTeamRoute(teamId)+query, etag); err != nil {
+		return nil, &Response{StatusCode: r.StatusCode, Error: err}
+	} else {
+		defer closeBody(r)
+		return ChannelListFromJson(r.Body), BuildResponse(r)
+	}
+}
+
+// GetPublicChannelsByIdsForTeam returns a list of public channels based on provided team id string
+func (c *Client4) GetPublicChannelsByIdsForTeam(teamId string, channelIds []string) (*ChannelList, *Response) {
+	if r, err := c.DoApiPost(c.GetChannelsForTeamRoute(teamId)+"/ids", ArrayToJson(channelIds)); err != nil {
 		return nil, &Response{StatusCode: r.StatusCode, Error: err}
 	} else {
 		defer closeBody(r)
@@ -982,7 +992,7 @@ func (c *Client4) GetChannelsForTeamForUser(teamId, userId, etag string) (*Chann
 
 // SearchChannels returns the channels on a team matching the provided search term.
 func (c *Client4) SearchChannels(teamId string, search *ChannelSearch) (*ChannelList, *Response) {
-	if r, err := c.DoApiPost(c.GetTeamRoute(teamId)+"/channels/search", search.ToJson()); err != nil {
+	if r, err := c.DoApiPost(c.GetChannelsForTeamRoute(teamId)+"/search", search.ToJson()); err != nil {
 		return nil, &Response{StatusCode: r.StatusCode, Error: err}
 	} else {
 		defer closeBody(r)
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