<?php
/**
 * Conversations controller
 *
 * @author Pierre HUBERT
 */

class conversationsController{

	/**
	 * Get the conversations list
	 *
	 * @url POST /conversations/getList
	 */
	public function getList(){
		user_login_required();

		//Try to get the list
		$conversationsList = CS::get()->components->conversations->getList(userID);

		//Check for errors
		if($conversationsList === false)
			Rest_fatal_error(500, "Couldn't get conversations list !");
		
		//Return results
		return $conversationsList;
	}

	/**
	 * Get informationsd about one conversation
	 *
	 * @url POST /conversations/getInfosOne
	 */
	public function getOneInformations(){
		user_login_required();

		//First, check the parametres
		if(!isset($_POST['conversationID']))
			Rest_fatal_error(501, "No conversation ID specified with the request");
		
		//Extract data
		$conversationID = toInt($_POST['conversationID']);
		
		//Try to get informations about the conversation
		$conversationsList = CS::get()->components->conversations->getList(userID, $conversationID);

		//Check for errors
		if($conversationsList === false)
			Rest_fatal_error(500, "An internal error occured");

		//Check if a conversation was found
		if(count($conversationsList) < 1)
			Rest_fatal_error(401, "Users doesn't belong to the specified conversation,".
			"or the conversation doesn't exists !");

		//Return conversation informations
		return $conversationsList[0];
	}

	/**
	 * Create a new conversation
	 *
	 * @url POST /conversations/create
	 */
	public function create(){
		user_login_required();

		//Check for parametres
		if(!check_post_parametres(array("name", "follow", "users")))
			Rest_fatal_error(501, "Please check parametres passed with the request !");
		
		//Extract parametres
		$conversationName = ($_POST["name"] == "false" ? false : $_POST['name']);
		$followConversation = ($_POST['follow'] == "true" ? true : false);
		$usersList = users_list_to_array($_POST['users']);

		//Add current user (if not present)
		if(!isset($usersList[userID]))
			$usersList[userID] = userID;

		//Check users
		if(count($usersList) < 1)
			Rest_fatal_error(501, "Please select at least one user !");
		
		//Try to create the conversation
		$conversationID = CS::get()->components->conversations->create(userID, $followConversation, $usersList, $conversationName);
		
		//Check for errors
		if($conversationID == 0)
			Rest_fatal_error(500, "Couldn't create the conversation !");

		//Success
		return array(
			"conversationID" => $conversationID,
			"success" => "The conversation was successfully created !"
		);
	}

	/**
	 * Update a conversation settings
	 *
	 * @url POST /conversations/updateSettings
	 */
	public function updateSettings(){
		user_login_required();

		//Check conversation ID was specified
		if(!isset($_POST["conversationID"]))
			Rest_fatal_error("501", "Please specify a conversation ID !");
		$conversationID = toInt($_POST["conversationID"]);

		//Check if the user is a conversation moderator or not
		if(!CS::get()->components->conversations->userBelongsTo(userID, $conversationID))
			Rest_fatal_error("401", "Specified user doesn't belongs to the conversation !");

		//Check if user want to update its follow state
		if(isset($_POST['following'])){
			$follow = $_POST["following"] === "true" ? true : false;

			//Try to update follow state
		 	if(!CS::get()->components->conversations->changeFollowState(userID, $conversationID, $follow))
		 		Rest_fatal_error(500, "Couldn't update user follow state !");
		}
		
		//Check if user asked to change moderation settings
		if(isset($_POST['members']) OR isset($_POST['name'])){

			//Check if user is allowed to change such settings
			if(!CS::get()->components->conversations->userIsModerator(userID, $conversationID))
				Rest_fatal_error(401, "The user isn't a moderator, he can't updates such settings !");
			
			//Update conversation name (if required)
			if(isset($_POST["name"])){
				$conversationName = $_POST['name'] == "false" ? "" : $_POST['name'];

				//Update conversation name
				if(!CS::get()->components->conversations->changeName($conversationID, $conversationName))
					Rest_fatal_error(500, "Couldn't update conversation name !");
			}

			//Update conversation users (if required)
			if(isset($_POST["members"])){
				//Get user list
				$conversationMembers = users_list_to_array($_POST['members']);

				//Make sure current user is in the list
				$conversationMembers[userID] = userID;

				//Try to update conversation members
				if(!CS::get()->components->conversations->updateMembers($conversationID, $conversationMembers))
					Rest_fatal_error(500, "Couldn't update conversation members list !");
			}

		}
			
		//Success
		return array("success" => "Conversation informations were successfully updated !");
	}
}