<?php
	/**
	 * @class  sessionModel
	 * @author NHN (developers@xpressengine.com)
	 * @brief The Model class of the session module
	 **/

	class sessionModel extends session {

		/**
		 * @brief Initialization
		 **/
		function init() {
		}

		function getLifeTime() {
			return $this->lifetime;
		}

		function read($session_key) {
			if(!$session_key || !$this->session_started) return;
			
			$oCacheHandler = &CacheHandler::getInstance('object');
			if($oCacheHandler->isSupport()){
				$cache_key = 'object:'.$session_key;
				$output->data = $oCacheHandler->get($cache_key);
			}
			if(!$output->data) {

				$args->session_key = $session_key;
				$columnList = array('session_key', 'cur_mid', 'val');
	            $output = executeQuery('session.getSession', $args, $columnList);
	            // Confirm there is a table created if read error occurs
	            if(!$output->toBool()) {
	                $oDB = &DB::getInstance();
	                if(!$oDB->isTableExists('session')) $oDB->createTableByXmlFile($this->module_path.'schemas/session.xml');
	                if(!$oDB->isColumnExists("session","cur_mid")) $oDB->addColumn('session',"cur_mid","varchar",128);
	                $output = executeQuery('session.getSession', $args);
	            }
	            // Check if there is a table created in case there is no "cur_mid" value in the sessions information
	            if(!isset($output->data->cur_mid)) {
	                $oDB = &DB::getInstance();
	                if(!$oDB->isColumnExists("session","cur_mid")) $oDB->addColumn('session',"cur_mid","varchar",128);
	            }
	           
			}
			return $output->data->val;
		}

		/**
		 * @brief Get a list of currently connected users
		 * Requires "object" argument because multiple arguments are expected
		 * limit_count : the number of objects
		 * page : the page number
		 * period_time: "n" specifies the time range in minutes since the last update
		 * mid: a user who belong to a specified mid
		 **/
		function getLoggedMembers($args) {
			if(!$args->site_srl) {
				$site_module_info = Context::get('site_module_info');
				$args->site_srl = (int)$site_module_info->site_srl;
			}
			if(!$args->list_count) $args->list_count = 20;
			if(!$args->page) $args->page = 1;
			if(!$args->period_time) $args->period_time = 3;
			$args->last_update = date("YmdHis", time() - $args->period_time*60);

			$output = executeQueryArray('session.getLoggedMembers', $args);
			if(!$output->toBool()) return $output;

			$member_srls = array();
			if(count($output->data)) {
				foreach($output->data as $key => $val) {
					$member_srls[$key] = $val->member_srl;
					$member_keys[$val->member_srl] = $key;
				}
			}

			if(Context::get('is_logged')) {
				$logged_info = Context::get('logged_info');
				if(!in_array($logged_info->member_srl, $member_srls)) {
					$member_srls[0] = $logged_info->member_srl;
					$member_keys[$logged_info->member_srl] = 0;
				}
			}

			if(!count($member_srls)) return $output;

			$member_args->member_srl = implode(',',$member_srls);
			$member_output = executeQueryArray('member.getMembers', $member_args);
			if($member_output->data) {
				foreach($member_output->data as $key => $val) {
					$output->data[$member_keys[$val->member_srl]] = $val;
				}
			}

			return $output;
		}
	}
?>
