export default class ContentController{

	/* (1) Construct default attributes
	*
	---------------------------------------------------------*/

	constructor(){}

	/* (2) Channel bindings
	*
	---------------------------------------------------------*/
	get cid(){  return gs.get.channel.current; }

	get cbuf(){

		/* (1) Ignore: if no channel */
		if( gs.get.channel.list == null || gs.get.channel.list.length === 0 )
			return {};

		/* (2) Search for current channel */
		for( let c of gs.get.channel.list ){

			// Return if channel found //
			if( c.id === this.cid )
				return c;

		}


		/* (3) If nothing found */
		return {};

	}


	/* (3) Room ID binding
	*
	---------------------------------------------------------*/
	get rid(){ return gs.get.room.text.current; }

	get rbuf(){

		/* (1) Ignore: if no rooms empty */
		if( gs.get.room.text.list == null || gs.get.room.text.list.length === 0 )
			return {};

		/* (2) Search for current room */
		for( let r of gs.get.room.text.list ){

			// Return if room found //
			if( r.id === this.rid )
				return r;

		}


		/* (3) If nothing found */
		return {};

	}

	get messages(){ return this.rbuf.messages; }
	get members(){  return this.rbuf.members;  }


	/* (5) User getter
	*
	* @user_id<int>					User id
	*
	* @return user<array>			User data
	*
	---------------------------------------------------------*/
	user(user_id=null){

		/* (1) Error: if invalid user_id */
		if( isNaN(user_id) )
			return {};

		/* (2) Error: unknown user */
		if( this.cbuf.users == null || this.cbuf.users.length < 1 )
			return {};

		/* (3) return user data */
		for( let u of this.cbuf.users )
			if( u.uid === user_id )
				return u;

		/* (4) Error */
		return {};

	}


	/* (6) Textarea auto_grow
	*
	* @e<Event>						Textarea event
	*
	---------------------------------------------------------*/
	auto_grow(e){

		setTimeout(() => {
			e.target.style.height = '0';
			e.target.style.height = `calc( ${e.target.scrollHeight}px )`;
		}, 1);
	}



}