<?php
/*
* 2007-2015 PrestaShop
*
* NOTICE OF LICENSE
*
* This source file is subject to the Open Software License (OSL 3.0)
* that is bundled with this package in the file LICENSE.txt.
* It is also available through the world-wide-web at this URL:
* http://opensource.org/licenses/osl-3.0.php
* If you did not receive a copy of the license and are unable to
* obtain it through the world-wide-web, please send an email
* to license@prestashop.com so we can send you a copy immediately.
*
* DISCLAIMER
*
* Do not edit or add to this file if you wish to upgrade PrestaShop to newer
* versions in the future. If you wish to customize PrestaShop for your
* needs please refer to http://www.prestashop.com for more information.
*
*  @author PrestaShop SA <contact@prestashop.com>
*  @copyright  2007-2015 PrestaShop SA
*  @license    http://opensource.org/licenses/osl-3.0.php  Open Software License (OSL 3.0)
*  International Registered Trademark & Property of PrestaShop SA
*/

/**
 * Class ContextCore
 *
 * @since 1.5.0.1
 */
class ContextCore
{
	/* @var Context */
	protected static $instance;

	/** @var Cart */
	public $cart;

	/** @var Customer */
	public $customer;

	/** @var Cookie */
	public $cookie;

	/** @var Link */
	public $link;

	/** @var Country */
	public $country;

	/** @var Employee */
	public $employee;

	/** @var AdminController|FrontController */
	public $controller;

	/** @var string */
	public $override_controller_name_for_translations;

	/** @var Language */
	public $language;

	/** @var Currency */
	public $currency;

	/** @var AdminTab */
	public $tab;

	/** @var Shop */
	public $shop;

	/** @var Theme */
	public $theme;

	/** @var Smarty */
	public $smarty;

	/** @var Mobile_Detect */
	public $mobile_detect;

	/** @var int */
	public $mode;

	/**
	 * Mobile device of the customer
	 *
	 * @var bool|null
	 */
	protected $mobile_device = null;

	/** @var bool|null */
	protected $is_mobile = null;

	/** @var bool|null */
	protected $is_tablet = null;

	/** @var int */
	const DEVICE_COMPUTER = 1;

	/** @var int */
	const DEVICE_TABLET = 2;

	/** @var int */
	const DEVICE_MOBILE = 4;

	/** @var int */
	const MODE_STD = 1;

	/** @var int */
	const MODE_STD_CONTRIB = 2;

	/** @var int */
	const MODE_HOST_CONTRIB = 4;

	/** @var int */
	const MODE_HOST = 8;

	/**
	 * Sets Mobile_Detect tool object
	 *
	 * @return Mobile_Detect
	 */
	public function getMobileDetect()
	{
		if ($this->mobile_detect === null)
		{
			require_once(_PS_TOOL_DIR_.'mobile_Detect/Mobile_Detect.php');
			$this->mobile_detect = new Mobile_Detect();
		}
		return $this->mobile_detect;
	}

	/**
	 * Checks if visitor's device is a mobile device
	 *
	 * @return bool
	 */
	public function isMobile()
	{
		if ($this->is_mobile === null)
		{
			$mobile_detect = $this->getMobileDetect();
			$this->is_mobile = $mobile_detect->isMobile();
		}
		return $this->is_mobile;
	}

	/**
	 * Checks if visitor's device is a tablet device
	 *
	 * @return bool
	 */
	public function isTablet()
	{
		if ($this->is_tablet === null)
		{
			$mobile_detect = $this->getMobileDetect();
			$this->is_tablet = $mobile_detect->isTablet();
		}
		return $this->is_tablet;
	}

	/**
	 * Sets mobile_device context variable
	 *
	 * @return bool
	 */
	public function getMobileDevice()
	{
		if ($this->mobile_device === null)
		{
			$this->mobile_device = false;
			if ($this->checkMobileContext())
			{
				if (isset(Context::getContext()->cookie->no_mobile) && Context::getContext()->cookie->no_mobile == false && (int)Configuration::get('PS_ALLOW_MOBILE_DEVICE') != 0)
					$this->mobile_device = true;
				else
				{
					switch ((int)Configuration::get('PS_ALLOW_MOBILE_DEVICE'))
					{
						case 1: // Only for mobile device
							if ($this->isMobile() && !$this->isTablet())
								$this->mobile_device = true;
							break;
						case 2: // Only for touchpads
							if ($this->isTablet() && !$this->isMobile())
								$this->mobile_device = true;
							break;
						case 3: // For touchpad or mobile devices
							if ($this->isMobile() || $this->isTablet())
								$this->mobile_device = true;
							break;
					}
				}
			}
		}
		return $this->mobile_device;
	}

	/**
	 * Returns mobile device type
	 *
	 * @return int
	 */
	public function getDevice()
	{
		static $device = null;

		if ($device === null)
		{
			if ($this->isTablet())
				$device = Context::DEVICE_TABLET;
			elseif ($this->isMobile())
				$device = Context::DEVICE_MOBILE;
			else
				$device = Context::DEVICE_COMPUTER;
		}

		return $device;
	}

	/**
	 * Checks if mobile context is possible
	 *
	 * @return bool
	 * @throws PrestaShopException
	 */
	protected function checkMobileContext()
	{
		// Check mobile context
		if (Tools::isSubmit('no_mobile_theme'))
		{
			Context::getContext()->cookie->no_mobile = true;
			if (Context::getContext()->cookie->id_guest)
			{
				$guest = new Guest(Context::getContext()->cookie->id_guest);
				$guest->mobile_theme = false;
				$guest->update();
			}
		}
		elseif (Tools::isSubmit('mobile_theme_ok'))
		{
			Context::getContext()->cookie->no_mobile = false;
			if (Context::getContext()->cookie->id_guest)
			{
				$guest = new Guest(Context::getContext()->cookie->id_guest);
				$guest->mobile_theme = true;
				$guest->update();
			}
		}

		return isset($_SERVER['HTTP_USER_AGENT'])
			&& isset(Context::getContext()->cookie)
			&& (bool)Configuration::get('PS_ALLOW_MOBILE_DEVICE')
			&& @filemtime(_PS_THEME_MOBILE_DIR_)
			&& !Context::getContext()->cookie->no_mobile;
	}

	/**
	 * Get a singleton instance of Context object
	 *
	 * @return Context
	 */
	public static function getContext()
	{
		if (!isset(self::$instance))
			self::$instance = new Context();

		return self::$instance;
	}

	/**
	 * @param $test_instance Context
	 * Unit testing purpose only
	 */
	public static function setInstanceForTesting($test_instance)
	{
		self::$instance = $test_instance;
	}

	/**
	 * Unit testing purpose only
	 */
	public static function deleteTestingInstance()
	{
		self::$instance = null;
	}

	/**
	 * Clone current context object
	 *
	 * @return Context
	 */
	public function cloneContext()
	{
		return clone($this);
	}
}
