[NEW] Command /hide to hide channels

[mikaelmello]

Closes #10713
Closes #8239

Simple feature requested in #10713, when an user executes the slash command /hide, they hide the channel and are redirected to the homepage.

I've decided to redirect the user to the homepage after hiding because that is the current behavior when you hide the current room you are in using the GUI.

[mikaelmello]

@karlprieb @ggazzo I've been recommended to ask one of you to review it, if possible

[ggazzo]

what do you think about allow hide another room typing /hide #room_name ? I dont think will take much more time.

[ggazzo]

change to api.addFiles('client/hide.js', 'client'); (and move the file =) )

[ggazzo]

can you explain why you are using this try catch? Meteor.call doest throw exceptions on client side, you should use

Meteor.call('hideRoom', item.rid, err => {
  if(err) {
    return RocketChat.Notifications.notifyUser(Meteor.userId(), 'mes'.......
  } 
  if (['channel', 'group', 'direct'].includes(FlowRouter.getRouteName()) && (Session.get('openedRoom') === item.rid)) {
			FlowRouter.go('home');
			Session.delete('openedRoom');
		}
}) ```

[mikaelmello]

I used the slashcommands-leave as a base, there's a try catch there so I figured I should do the same too. Will update it soon, along with the other suggestions

[graywolf336]

We need a server implementation of this, otherwise the mobile applications won't have access to this command.

[mikaelmello]

@ggazzo and @graywolf336, all done.

[ggazzo]

@mikaelmello I made some changes could test and see if you agree?

[mikaelmello]

@ggazzo Much better. I had written Hide_given_room to match the join command, but if you prefer it that way alright. About Room_doesnt_exist, it was because of direct messages.

[ggazzo]

Actually, the sentence 'Hide_given_room' is better but, we have a lot of strings, and probably we will change in the future

moved to server side