spa-api/system/session/db.php

<?php namespace System\Session;

use System\Config;
use System\DB\Manager;

class DB implements Driver {

	/**
	 * Load a session by ID.
	 *
	 * @param  string  $id
	 * @return array
	 */
	public function load($id)
	{
		$session = $this->table()->find($id);

		if ( ! is_null($session))
		{
			return array(
				'id'            => $session->id,
				'last_activity' => $session->last_activity,
				'data'          => unserialize($session->data)
			);
		}
	}

	/**
	 * Save a session.
	 *
	 * @param  array  $session
	 * @return void
	 */
	public function save($session)
	{
		$this->delete($session['id']);

		$this->table()->insert(array(
			'id'            => $session['id'], 
			'last_activity' => $session['last_activity'], 
			'data'          => serialize($session['data'])
		));
	}

	/**
	 * Delete a session by ID.
	 *
	 * @param  string  $id
	 * @return void
	 */
	public function delete($id)
	{
		$this->table()->delete($id);
	}

	/**
	 * Delete all expired sessions.
	 *
	 * @param  int   $expiration
	 * @return void
	 */
	public function sweep($expiration)
	{
		$this->table()->where('last_activity', '<', $expiration)->delete();
	}

	/**
	 * Get a session database query.
	 *
	 * @return Query
	 */
	private function table()
	{
		return Manager::connection()->table(Config::get('session.table'));		
	}
	
}