PLT-6484 Add /leave command to leave a channel (#6402)

* PLT-6484 Add /leave command to leave a channel

* Text changes requeted on review.

* PLT-6484 Display the right error message when trying to /leave town-square

* PLT-6484 Be able to execute /leave command in direct and group message channels with the same effect as clicking x

* PLT-6484 Refactor to create new leave_private_channel_modal.jsx

* PLT-6484 Remove previous leave private channel logic to use new leave_private_channel_modal.jsx

* Remove dot in command description. Change localized error when leaving Town square.

* disable /leave command in reply threads on the right-hand sidebar, since it is not obvious which channel you should leave

1 files changed, 66 insertions, 0 deletions

diff --git a/api/command_leave_test.go b/api/command_leave_test.go
new file mode 100644
index 000000000..ae098b8a2
--- /dev/null
+++ b/api/command_leave_test.go
@@ -0,0 +1,66 @@
+// Copyright (c) 2017-present Mattermost, Inc. All Rights Reserved.
+// See License.txt for license information.
+
+package api
+
+import (
+	"strings"
+	"testing"
+
+	"github.com/mattermost/platform/model"
+)
+
+func TestLeaveCommands(t *testing.T) {
+	th := Setup().InitBasic()
+	Client := th.BasicClient
+	team := th.BasicTeam
+	user2 := th.BasicUser2
+
+	channel1 := &model.Channel{DisplayName: "AA", Name: "aa" + model.NewId() + "a", Type: model.CHANNEL_OPEN, TeamId: team.Id}
+	channel1 = Client.Must(Client.CreateChannel(channel1)).Data.(*model.Channel)
+	Client.Must(Client.JoinChannel(channel1.Id))
+
+	channel2 := &model.Channel{DisplayName: "BB", Name: "bb" + model.NewId() + "a", Type: model.CHANNEL_PRIVATE, TeamId: team.Id}
+	channel2 = Client.Must(Client.CreateChannel(channel2)).Data.(*model.Channel)
+	Client.Must(Client.JoinChannel(channel2.Id))
+	Client.Must(Client.AddChannelMember(channel2.Id, user2.Id))
+
+	channel3 := Client.Must(Client.CreateDirectChannel(user2.Id)).Data.(*model.Channel)
+
+	rs1 := Client.Must(Client.Command(channel1.Id, "/leave")).Data.(*model.CommandResponse)
+	if !strings.HasSuffix(rs1.GotoLocation, "/"+team.Name+"/channels/"+model.DEFAULT_CHANNEL) {
+		t.Fatal("failed to leave open channel 1")
+	}
+
+	rs2 := Client.Must(Client.Command(channel2.Id, "/leave")).Data.(*model.CommandResponse)
+	if !strings.HasSuffix(rs2.GotoLocation, "/"+team.Name+"/channels/"+model.DEFAULT_CHANNEL) {
+		t.Fatal("failed to leave private channel 1")
+	}
+
+	rs3 := Client.Must(Client.Command(channel3.Id, "/leave")).Data.(*model.CommandResponse)
+	if strings.HasSuffix(rs3.GotoLocation, "/"+team.Name+"/channels/"+model.DEFAULT_CHANNEL) {
+		t.Fatal("should not have left direct message channel")
+	}
+
+	cdata := Client.Must(Client.GetChannels("")).Data.(*model.ChannelList)
+
+	found := false
+	for _, c := range *cdata {
+		if c.Id == channel1.Id || c.Id == channel2.Id {
+			found = true
+		}
+	}
+
+	if found {
+		t.Fatal("did not leave right channels")
+	}
+
+	for _, c := range *cdata {
+		if c.Name == model.DEFAULT_CHANNEL {
+			if _, err := Client.LeaveChannel(c.Id); err == nil {
+				t.Fatal("should have errored on leaving default channel")
+			}
+			break
+		}
+	}
+}