<?php
/**
 * Provides updates for plugins included with the theme.
 *
 * This class does NOT technically provide auto updates, but rather
 * alerts the admin of updated plugins inside the theme so
 * they can be updated just like any other plugin.
 *
 * The theme must be updated before any plugins can be updated due
 * to Envato rules 3rd party plugins must be included with the theme
 * and not provided via 3rd party methods.
 *
 * @package Total WordPress Theme
 * @subpackage Framework
 * @version 3.6.0
 * @deprecated 4.4
 */

namespace TotalTheme;

// Exit if accessed directly
if ( ! defined( 'ABSPATH' ) ) {
	exit;
}

// Start Class
class PluginUpdater {

	/**
	 * Main constructor
	 *
	 * @since 3.3.3
	 */
	public function __construct() {
		add_filter( 'pre_set_site_transient_update_plugins', array( $this, 'check_for_updates' ) );
		//set_site_transient( 'update_plugins', null ); // For testing only
	}

	/**
	 * Check transients
	 *
	 * @since 3.3.3
	 */
	public function check_for_updates( $transient ) {

		//print_r( $transient );

		// Transient already checked
		if ( empty( $transient->checked ) ) {
			return $transient;
		}

		// Return array of installed plugins
		$installed_plugins = $this->get_plugins();

		// No plugins installed
		if ( empty( $installed_plugins ) || ! is_array( $installed_plugins ) ) {
			return $transient;
		}

		// Get recommended plugins
		$recommended_plugins = wpex_recommended_plugins();

		// Remove contact form 7
		if ( $recommended_plugins && is_array( $recommended_plugins ) ) {
			unset( $recommended_plugins['contact-form-7'] );
		}

		// List of plugins to provide auto updates for
		$plugins_to_check = $this->plugins_to_check( $installed_plugins );

		// Loop through plugins and check if an update is available
		foreach ( $recommended_plugins as $plugin ) {
			if ( 'js_composer' == $plugin && is_multisite() ) {
				continue;
			}
			if ( in_array( $plugin['slug'], $plugins_to_check ) ) {
				$has_update = $this->has_update( $plugin, $installed_plugins );
				if ( $has_update ) {
					$response = array(
						'new_version' => $plugin['version'],
						'package'     => $plugin['source'],
						'slug'        => $plugin['slug']
					);
					$base = $this->get_plugin_base( $plugin['slug'] );
					$transient->response[$base] = (object) $response;
				}
			}
		}

		//var_dump( $transient );

		// Return transient
		return $transient;

	}

	/**
	 * Get list of plugins.
	 *
	 * @since 3.3.0
	 */
	public function get_plugins( $plugin_folder = '' ) {
		if ( ! function_exists( 'get_plugins' ) ) {
			require_once ABSPATH . 'wp-admin/includes/plugin.php';
		}
		return get_plugins( $plugin_folder );
	}

	/**
	 * List of plugins to check for updates
	 *
	 * @since 3.3.3
	 */
	private function get_plugin_base( $plugin ) {
		if ( 'js_composer' == $plugin ) {
			return 'js_composer/js_composer.php';
		} elseif ( 'revslider' == $plugin ) {
			return 'revslider/revslider.php';
		} elseif ( 'templatera' == $plugin ) {
			return 'templatera/templatera.php';
		}
	}

	/**
	 * List of plugins to check for updates
	 * Only check active plugins
	 *
	 * @since 3.3.3
	 */
	private function plugins_to_check( $installed_plugins ) {
		$plugins_to_check = array();
		if ( array_key_exists( 'js_composer/js_composer.php', $installed_plugins )
			&& wpex_vc_theme_mode_check()
		) {
			$plugins_to_check['js_composer'] = 'js_composer';
		}
		if ( array_key_exists( 'revslider/revslider.php', $installed_plugins ) ) {
			$plugins_to_check['revslider'] = 'revslider';
		}
		if ( array_key_exists( 'templatera/templatera.php', $installed_plugins ) ) {
			$plugins_to_check['templatera'] = 'templatera';
		}
		return $plugins_to_check;
	}

	/**
	 * Check if a plugin has an update available
	 *
	 * @since 3.3.3
	 */
	private function has_update( $plugin, $plugins ) {
		$base                = $this->get_plugin_base( $plugin['slug'] );
		$installed_version   = isset( $plugins[$base]['Version'] ) ? $plugins[$base]['Version'] : '';
		$recommended_version = $plugin['version'];
		if ( $installed_version ) {
			return version_compare( $recommended_version, $installed_version, '>' );
		}
	}

}
new PluginUpdater();