APIv4 post /channels/ids (#5845)

* APIv4 post /channels/ids

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

2 files changed, 98 insertions, 2 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()