[MM-27376] api4/channel: add move channel to local mode (#15200)

* api4/channel: add move channel to local mode

* app/channel: reflect review comments

api4/channel_local.go

@@ -17,6 +17,7 @@ func (api *API) InitChannelLocal() {
 	api.BaseRoutes.ChannelByName.Handle("", api.ApiLocal(getChannelByName)).Methods("GET")
 	api.BaseRoutes.Channel.Handle("", api.ApiLocal(deleteChannel)).Methods("DELETE")
 	api.BaseRoutes.Channel.Handle("/patch", api.ApiLocal(localPatchChannel)).Methods("PUT")
+	api.BaseRoutes.Channel.Handle("/move", api.ApiLocal(localMoveChannel)).Methods("POST")
 
 	api.BaseRoutes.ChannelMember.Handle("", api.ApiLocal(localRemoveChannelMember)).Methods("DELETE")
 	api.BaseRoutes.ChannelMember.Handle("", api.ApiLocal(getChannelMember)).Methods("GET")
@@ -206,3 +207,73 @@ func localPatchChannel(c *Context, w http.ResponseWriter, r *http.Request) {
 
 	w.Write([]byte(rchannel.ToJson()))
 }
+
+func localMoveChannel(c *Context, w http.ResponseWriter, r *http.Request) {
+	c.RequireChannelId()
+	if c.Err != nil {
+		return
+	}
+
+	channel, err := c.App.GetChannel(c.Params.ChannelId)
+	if err != nil {
+		c.Err = err
+		return
+	}
+
+	props := model.StringInterfaceFromJson(r.Body)
+	teamId, ok := props["team_id"].(string)
+	if !ok {
+		c.SetInvalidParam("team_id")
+		return
+	}
+
+	force, ok := props["force"].(bool)
+	if !ok {
+		c.SetInvalidParam("force")
+		return
+	}
+
+	team, err := c.App.GetTeam(teamId)
+	if err != nil {
+		c.Err = err
+		return
+	}
+
+	auditRec := c.MakeAuditRecord("localMoveChannel", audit.Fail)
+	defer c.LogAuditRec(auditRec)
+	auditRec.AddMeta("channel_id", channel.Id)
+	auditRec.AddMeta("channel_name", channel.Name)
+	auditRec.AddMeta("team_id", team.Id)
+	auditRec.AddMeta("team_name", team.Name)
+
+	if channel.Type == model.CHANNEL_DIRECT || channel.Type == model.CHANNEL_GROUP || channel.Type == model.CHANNEL_PRIVATE {
+		c.Err = model.NewAppError("moveChannel", "api.channel.move_channel.type.invalid", nil, "", http.StatusForbidden)
+		return
+	}
+
+	err = c.App.RemoveAllDeactivatedMembersFromChannel(channel)
+	if err != nil {
+		c.Err = err
+		return
+	}
+
+	if force {
+		err = c.App.RemoveUsersFromChannelNotMemberOfTeam(nil, channel, team)
+		if err != nil {
+			c.Err = err
+			return
+		}
+	}
+
+	err = c.App.MoveChannel(team, channel, nil)
+	if err != nil {
+		c.Err = err
+		return
+	}
+
+	auditRec.Success()
+	c.LogAudit("channel=" + channel.Name)
+	c.LogAudit("team=" + team.Name)
+
+	w.Write([]byte(channel.ToJson()))
+}