3 files changed, 136 insertions, 2 deletions
diff --git a/api4/apitestlib.go b/api4/apitestlib.go
index 64d3f22b2..b3007ebfe 100644
--- a/api4/apitestlib.go
+++ b/api4/apitestlib.go
@@ -498,14 +498,14 @@ func CheckErrorMessage(t *testing.T, resp *model.Response, errorId string) {
 func CheckInternalErrorStatus(t *testing.T, resp *model.Response) {
 	if resp.Error == nil {
 		debug.PrintStack()
-		t.Fatal("should have errored with status:" + strconv.Itoa(http.StatusNotImplemented))
+		t.Fatal("should have errored with status:" + strconv.Itoa(http.StatusInternalServerError))
 		return
 	}
 
 	if resp.StatusCode != http.StatusInternalServerError {
 		debug.PrintStack()
 		t.Log("actual: " + strconv.Itoa(resp.StatusCode))
-		t.Log("expected: " + strconv.Itoa(http.StatusNotImplemented))
+		t.Log("expected: " + strconv.Itoa(http.StatusInternalServerError))
 		t.Fatal("wrong status code")
 	}
 }
diff --git a/api4/channel.go b/api4/channel.go
index bd1710975..61d9e6f53 100644
--- a/api4/channel.go
+++ b/api4/channel.go
@@ -33,6 +33,7 @@ func InitChannel() {
 
 	BaseRoutes.ChannelMembers.Handle("", ApiSessionRequired(getChannelMembers)).Methods("GET")
 	BaseRoutes.ChannelMembers.Handle("/ids", ApiSessionRequired(getChannelMembersByIds)).Methods("POST")
+	BaseRoutes.ChannelMembers.Handle("", ApiSessionRequired(addChannelMember)).Methods("POST")
 	BaseRoutes.ChannelMembersForUser.Handle("", ApiSessionRequired(getChannelMembersForUser)).Methods("GET")
 	BaseRoutes.ChannelMember.Handle("", ApiSessionRequired(getChannelMember)).Methods("GET")
 	BaseRoutes.ChannelMember.Handle("", ApiSessionRequired(removeChannelMember)).Methods("DELETE")
@@ -498,6 +499,51 @@ func updateChannelMemberRoles(c *Context, w http.ResponseWriter, r *http.Request
 	ReturnStatusOK(w)
 }
 
+func addChannelMember(c *Context, w http.ResponseWriter, r *http.Request) {
+	c.RequireChannelId()
+	if c.Err != nil {
+		return
+	}
+
+	member := model.ChannelMemberFromJson(r.Body)
+	if member == nil {
+		c.SetInvalidParam("channel_member")
+		return
+	}
+
+	if len(member.UserId) != 26 {
+		c.SetInvalidParam("user_id")
+		return
+	}
+
+	member.ChannelId = c.Params.ChannelId
+
+	var channel *model.Channel
+	var err *model.AppError
+	if channel, err = app.GetChannel(member.ChannelId); err != nil {
+		c.Err = err
+		return
+	}
+
+	if channel.Type == model.CHANNEL_OPEN && !app.SessionHasPermissionToChannel(c.Session, channel.Id, model.PERMISSION_MANAGE_PUBLIC_CHANNEL_MEMBERS) {
+		c.SetPermissionError(model.PERMISSION_MANAGE_PUBLIC_CHANNEL_MEMBERS)
+		return
+	}
+
+	if channel.Type == model.CHANNEL_PRIVATE && !app.SessionHasPermissionToChannel(c.Session, channel.Id, model.PERMISSION_MANAGE_PRIVATE_CHANNEL_MEMBERS) {
+		c.SetPermissionError(model.PERMISSION_MANAGE_PRIVATE_CHANNEL_MEMBERS)
+		return
+	}
+
+	if cm, err := app.AddChannelMember(member.UserId, channel, c.Session.UserId); err != nil {
+		c.Err = err
+		return
+	} else {
+		c.LogAudit("name=" + channel.Name + " user_id=" + cm.UserId)
+		w.Write([]byte(cm.ToJson()))
+	}
+}
+
 func removeChannelMember(c *Context, w http.ResponseWriter, r *http.Request) {
 	c.RequireChannelId().RequireUserId()
 	if c.Err != nil {
diff --git a/api4/channel_test.go b/api4/channel_test.go
index 6d5b5cef3..fd72a8ba7 100644
--- a/api4/channel_test.go
+++ b/api4/channel_test.go
@@ -1118,6 +1118,94 @@ func TestUpdateChannelRoles(t *testing.T) {
 	CheckForbiddenStatus(t, resp)
 }
 
+func TestAddChannelMember(t *testing.T) {
+	th := Setup().InitBasic().InitSystemAdmin()
+	defer TearDown()
+	Client := th.Client
+	user := th.BasicUser
+	user2 := th.BasicUser2
+	publicChannel := th.CreatePublicChannel()
+	privateChannel := th.CreatePrivateChannel()
+
+	cm, resp := Client.AddChannelMember(publicChannel.Id, user2.Id)
+	CheckNoError(t, resp)
+
+	if cm.ChannelId != publicChannel.Id {
+		t.Fatal("should have returned exact channel")
+	}
+
+	if cm.UserId != user2.Id {
+		t.Fatal("should have returned exact user added to public channel")
+	}
+
+	cm, resp = Client.AddChannelMember(privateChannel.Id, user2.Id)
+	CheckNoError(t, resp)
+
+	if cm.ChannelId != privateChannel.Id {
+		t.Fatal("should have returned exact channel")
+	}
+
+	if cm.UserId != user2.Id {
+		t.Fatal("should have returned exact user added to private channel")
+	}
+
+	cm, resp = Client.AddChannelMember(publicChannel.Id, "junk")
+	CheckBadRequestStatus(t, resp)
+
+	if cm != nil {
+		t.Fatal("should return nothing")
+	}
+
+	_, resp = Client.AddChannelMember(publicChannel.Id, GenerateTestId())
+	CheckNotFoundStatus(t, resp)
+
+	_, resp = Client.AddChannelMember("junk", user2.Id)
+	CheckBadRequestStatus(t, resp)
+
+	_, resp = Client.AddChannelMember(GenerateTestId(), user2.Id)
+	CheckNotFoundStatus(t, resp)
+
+	otherUser := th.CreateUser()
+	otherChannel := th.CreatePublicChannel()
+	Client.Logout()
+	Client.Login(user2.Id, user2.Password)
+
+	_, resp = Client.AddChannelMember(publicChannel.Id, otherUser.Id)
+	CheckUnauthorizedStatus(t, resp)
+
+	_, resp = Client.AddChannelMember(privateChannel.Id, otherUser.Id)
+	CheckUnauthorizedStatus(t, resp)
+
+	_, resp = Client.AddChannelMember(otherChannel.Id, otherUser.Id)
+	CheckUnauthorizedStatus(t, resp)
+
+	Client.Logout()
+	Client.Login(user.Id, user.Password)
+
+	// should fail adding user who is not a member of the team
+	_, resp = Client.AddChannelMember(otherChannel.Id, otherUser.Id)
+	CheckUnauthorizedStatus(t, resp)
+
+	Client.DeleteChannel(otherChannel.Id)
+
+	// should fail adding user to a deleted channel
+	_, resp = Client.AddChannelMember(otherChannel.Id, user2.Id)
+	CheckUnauthorizedStatus(t, resp)
+
+	Client.Logout()
+	_, resp = Client.AddChannelMember(publicChannel.Id, user2.Id)
+	CheckUnauthorizedStatus(t, resp)
+
+	_, resp = Client.AddChannelMember(privateChannel.Id, user2.Id)
+	CheckUnauthorizedStatus(t, resp)
+
+	_, resp = th.SystemAdminClient.AddChannelMember(publicChannel.Id, user2.Id)
+	CheckNoError(t, resp)
+
+	_, resp = th.SystemAdminClient.AddChannelMember(privateChannel.Id, user2.Id)
+	CheckNoError(t, resp)
+}
+
 func TestRemoveChannelMember(t *testing.T) {
 	th := Setup().InitBasic().InitSystemAdmin()
 	defer TearDown()