<?php
namespace Essential_Addons_Elementor\Pro\Classes;

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

/**
 * Allows plugins to use their own update API.
 *
 * @author Easy Digital Downloads
 * @version 1.6.15
 */
class Plugin_Updater
{
    private $api_url = '';
    private $api_data = array();
    private $name = '';
    private $slug = '';
    private $version = '';
    private $wp_override = false;
    private $cache_key = '';
    private $beta;

    /**
     * Class constructor.
     *
     * @uses plugin_basename()
     * @uses hook()
     *
     * @param string  $_api_url     The URL pointing to the custom API endpoint.
     * @param string  $_plugin_file Path to the plugin file.
     * @param array   $_api_data    Optional data to send with API calls.
     */
    public function __construct($_api_url, $_plugin_file, $_api_data = null)
    {
        global $edd_plugin_data;

        $this->api_url = trailingslashit($_api_url);
        $this->api_data = $_api_data;
        $this->name = plugin_basename($_plugin_file);
        $this->slug = basename($_plugin_file, '.php');
        $this->version = $_api_data['version'];
        $this->wp_override = isset($_api_data['wp_override']) ? (bool) $_api_data['wp_override'] : false;
        $this->beta = !empty($this->api_data['beta']) ? true : false;
        $this->cache_key = 'edd_sl_' . md5(serialize($this->slug . $this->api_data['license'] . $this->beta));

        $edd_plugin_data[$this->slug] = $this->api_data;

        // Set up hooks.
        $this->init();
    }

    /**
     * Set up WordPress filters to hook into WP's update process.
     *
     * @uses add_filter()
     *
     * @return void
     */
    public function init()
    {
        add_filter('pre_set_site_transient_update_plugins', array($this, 'check_update'));
        add_filter('plugins_api', array($this, 'plugins_api_filter'), 10, 3);
        remove_action('after_plugin_row_' . $this->name, 'wp_plugin_update_row', 10);
        add_action('after_plugin_row_' . $this->name, array($this, 'show_update_notification'), 10, 2);
        add_action('admin_init', array($this, 'show_changelog'));
    }

    /**
     * Check for Updates at the defined API endpoint and modify the update array.
     *
     * This function dives into the update API just when WordPress creates its update array,
     * then adds a custom API call and injects the custom plugin data retrieved from the API.
     * It is reassembled from parts of the native WordPress plugin update code.
     * See wp-includes/update.php line 121 for the original wp_update_plugins() function.
     *
     * @uses api_request()
     *
     * @param array   $_transient_data Update array build by WordPress.
     * @return array Modified update array with custom plugin data.
     */
    public function check_update($_transient_data)
    {
        global $pagenow;

        if (!is_object($_transient_data)) {
            $_transient_data = new \stdClass();
        }

        if ('plugins.php' == $pagenow && is_multisite()) {
            return $_transient_data;
        }

        if (!empty($_transient_data->response) && !empty($_transient_data->response[$this->name]) && false === $this->wp_override) {
            return $_transient_data;
        }

        $version_info = $this->get_cached_version_info();

        if (false === $version_info) {
            $version_info = $this->api_request('plugin_latest_version', array('slug' => $this->slug, 'beta' => $this->beta));
            $this->set_version_info_cache($version_info);
        }

        if (false !== $version_info && is_object($version_info) && isset($version_info->new_version)) {
            if (version_compare($this->version, $version_info->new_version, '<')) {
                $_transient_data->response[$this->name] = $version_info;
            }

            $_transient_data->last_checked = current_time('timestamp');
            $_transient_data->checked[$this->name] = $this->version;
        }

        return $_transient_data;
    }

    /**
     * show update nofication row -- needed for multisite subsites, because WP won't tell you otherwise!
     *
     * @param string  $file
     * @param array   $plugin
     */
    public function show_update_notification($file, $plugin)
    {
        if (is_network_admin()) {
            return;
        }

        if (!current_user_can('update_plugins')) {
            return;
        }

        if (!is_multisite()) {
            return;
        }

        if ($this->name != $file) {
            return;
        }

        // Remove our filter on the site transient
        remove_filter('pre_set_site_transient_update_plugins', array($this, 'check_update'), 10);

        $update_cache = get_site_transient('update_plugins');
        $update_cache = is_object($update_cache) ? $update_cache : new \stdClass();

        if (empty($update_cache->response) || empty($update_cache->response[$this->name])) {
            $version_info = $this->get_cached_version_info();

            if (false === $version_info) {
                $version_info = $this->api_request('plugin_latest_version', array('slug' => $this->slug, 'beta' => $this->beta));
                $this->set_version_info_cache($version_info);
            }

            if (!is_object($version_info)) {
                return;
            }

            if (version_compare($this->version, $version_info->new_version, '<')) {
                $update_cache->response[$this->name] = $version_info;
            }

            $update_cache->last_checked = current_time('timestamp');
            $update_cache->checked[$this->name] = $this->version;

            set_site_transient('update_plugins', $update_cache);
        } else {
            $version_info = $update_cache->response[$this->name];
        }

        // Restore our filter
        add_filter('pre_set_site_transient_update_plugins', array($this, 'check_update'));

        if (!empty($update_cache->response[$this->name]) && version_compare($this->version, $version_info->new_version, '<')) {
            // build a plugin list row, with update notification
            $wp_list_table = _get_list_table('WP_Plugins_List_Table');
            # <tr class="plugin-update-tr"><td colspan="' . $wp_list_table->get_column_count() . '" class="plugin-update colspanchange">
            echo '<tr class="plugin-update-tr" id="' . $this->slug . '-update" data-slug="' . $this->slug . '" data-plugin="' . $this->slug . '/' . $file . '">';
            echo '<td colspan="3" class="plugin-update colspanchange">';
            echo '<div class="update-message notice inline notice-warning notice-alt">';

            $changelog_link = self_admin_url('index.php?edd_sl_action=view_plugin_changelog&plugin=' . $this->name . '&slug=' . $this->slug . '&TB_iframe=true&width=772&height=911');

            if (empty($version_info->download_link)) {
                printf(
                    __('There is a new version of %1$s available. %2$sView version %3$s details%4$s.', 'easy-digital-downloads'),
                    esc_html($version_info->name),
                    '<a target="_blank" class="thickbox" href="' . esc_url($changelog_link) . '">',
                    esc_html($version_info->new_version),
                    '</a>'
                );
            } else {
                printf(
                    __('There is a new version of %1$s available. %2$sView version %3$s details%4$s or %5$supdate now%6$s.', 'easy-digital-downloads'),
                    esc_html($version_info->name),
                    '<a target="_blank" class="thickbox" href="' . esc_url($changelog_link) . '">',
                    esc_html($version_info->new_version),
                    '</a>',
                    '<a href="' . esc_url(wp_nonce_url(self_admin_url('update.php?action=upgrade-plugin&plugin=') . $this->name, 'upgrade-plugin_' . $this->name)) . '">',
                    '</a>'
                );
            }

            do_action("in_plugin_update_message-{$file}", $plugin, $version_info);

            echo '</div></td></tr>';
        }
    }

    /**
     * Updates information on the "View version x.x details" page with custom data.
     *
     * @uses api_request()
     *
     * @param mixed   $_data
     * @param string  $_action
     * @param object  $_args
     * @return object $_data
     */
    public function plugins_api_filter($_data, $_action = '', $_args = null)
    {
        if ($_action != 'plugin_information') {
            return $_data;
        }

        if (!isset($_args->slug) || ($_args->slug != $this->slug)) {
            return $_data;
        }

        $to_send = array(
            'slug' => $this->slug,
            'is_ssl' => is_ssl(),
            'fields' => array(
                'banners' => array(),
                'reviews' => false,
            ),
        );

        $cache_key = 'edd_api_request_' . md5(serialize($this->slug . $this->api_data['license'] . $this->beta));

        // Get the transient where we store the api request for this plugin for 24 hours
        $edd_api_request_transient = $this->get_cached_version_info($cache_key);

        //If we have no transient-saved value, run the API, set a fresh transient with the API value, and return that value too right now.
        if (empty($edd_api_request_transient)) {
            $api_response = $this->api_request('plugin_information', $to_send);

            // Expires in 3 hours
            $this->set_version_info_cache($api_response, $cache_key);

            if (false !== $api_response) {
                $_data = $api_response;
            }
        } else {
            $_data = $edd_api_request_transient;
        }

        // Convert sections into an associative array, since we're getting an object, but Core expects an array.
        if (isset($_data->sections) && !is_array($_data->sections)) {
            $new_sections = array();
            foreach ($_data->sections as $key => $value) {
                $new_sections[$key] = $value;
            }

            $_data->sections = $new_sections;
        }

        // Convert banners into an associative array, since we're getting an object, but Core expects an array.
        if (isset($_data->banners) && !is_array($_data->banners)) {
            $new_banners = array();
            foreach ($_data->banners as $key => $value) {
                $new_banners[$key] = $value;
            }

            $_data->banners = $new_banners;
        }

        return $_data;
    }

    /**
     * Disable SSL verification in order to prevent download update failures
     *
     * @param array   $args
     * @param string  $url
     * @return object $array
     */
    public function http_request_args($args, $url)
    {
        $verify_ssl = $this->verify_ssl();

        if (strpos($url, 'https://') !== false && strpos($url, 'edd_action=package_download')) {
            $args['sslverify'] = $verify_ssl;
        }

        return $args;
    }

    /**
     * Calls the API and, if successfull, returns the object delivered by the API.
     *
     * @uses get_bloginfo()
     * @uses wp_remote_post()
     * @uses is_wp_error()
     *
     * @param string  $_action The requested action.
     * @param array   $_data   Parameters for the API action.
     * @return false|object
     */
    private function api_request($_action, $_data)
    {
        global $wp_version;

        $data = array_merge($this->api_data, $_data);

        if ($data['slug'] != $this->slug) {
            return;
        }

        if ($this->api_url == trailingslashit(home_url())) {
            return false; // Don't allow a plugin to ping itself
        }

        $api_params = array(
            'edd_action' => 'get_version',
            'license' => !empty($data['license']) ? $data['license'] : '',
            'item_name' => isset($data['item_name']) ? $data['item_name'] : false,
            'item_id' => isset($data['item_id']) ? $data['item_id'] : false,
            'version' => isset($data['version']) ? $data['version'] : false,
            'slug' => $data['slug'],
            'author' => $data['author'],
            'url' => home_url(),
            'beta' => !empty($data['beta']),
        );

        $verify_ssl = $this->verify_ssl();
        $request = wp_remote_post($this->api_url, array('timeout' => 15, 'sslverify' => $verify_ssl, 'body' => $api_params));

        if (!is_wp_error($request)) {
            $request = json_decode(wp_remote_retrieve_body($request));
        }

        if ($request && isset($request->sections)) {
            $request->sections = maybe_unserialize($request->sections);
        } else {
            $request = false;
        }

        if ($request && isset($request->banners)) {
            $request->banners = maybe_unserialize($request->banners);
        }

        if (!empty($request->sections)) {
            foreach ($request->sections as $key => $section) {
                $request->$key = (array) $section;
            }
        }

        return $request;
    }

	public function show_changelog() {
		global $edd_plugin_data;

		if ( empty( $_REQUEST['edd_sl_action'] ) || 'view_plugin_changelog' !== $_REQUEST['edd_sl_action'] ) {
			return;
		}

		if ( empty( $_REQUEST['plugin'] ) || EAEL_PRO_PLUGIN_BASENAME !== $_REQUEST['plugin'] ) {
			return;
		}

		if ( empty( $_REQUEST['slug'] ) ) {
			return;
		}

		if ( ! current_user_can( 'update_plugins' ) ) {
			wp_die( __( 'You do not have permission to install plugin updates', 'easy-digital-downloads' ), __( 'Error', 'easy-digital-downloads' ), array( 'response' => 403 ) );
		}

		$data         = $edd_plugin_data[ $_REQUEST['slug'] ];
		$beta         = ! empty( $data['beta'] ) ? true : false;
		$cache_key    = md5( 'edd_plugin_' . sanitize_key( $_REQUEST['plugin'] ) . '_' . $beta . '_version_info' );
		$version_info = $this->get_cached_version_info( $cache_key );

		if ( false === $version_info ) {

			$api_params = array(
				'edd_action' => 'get_version',
				'item_name'  => isset( $data['item_name'] ) ? $data['item_name'] : false,
				'item_id'    => isset( $data['item_id'] ) ? $data['item_id'] : false,
				'slug'       => $_REQUEST['slug'],
				'author'     => $data['author'],
				'url'        => home_url(),
				'beta'       => ! empty( $data['beta'] ),
			);

			$verify_ssl = $this->verify_ssl();
			$request    = wp_remote_post( $this->api_url, array( 'timeout' => 15, 'sslverify' => $verify_ssl, 'body' => $api_params ) );

			if ( ! is_wp_error( $request ) ) {
				$version_info = json_decode( wp_remote_retrieve_body( $request ) );
			}

			if ( ! empty( $version_info ) && isset( $version_info->sections ) ) {
				$version_info->sections = maybe_unserialize( $version_info->sections );
			} else {
				$version_info = false;
			}

			if ( ! empty( $version_info ) ) {
				foreach ( $version_info->sections as $key => $section ) {
					$version_info->$key = (array) $section;
				}
			}

			$this->set_version_info_cache( $version_info, $cache_key );

		}

		if ( ! empty( $version_info ) && isset( $version_info->sections->changelog ) ) {
			echo '<div style="background:#fff;padding:10px;">' . $version_info->sections->changelog . '</div>';
		}

		exit;
	}

    public function get_cached_version_info($cache_key = '')
    {
        if (empty($cache_key)) {
            $cache_key = $this->cache_key;
        }

        $cache = get_option($cache_key);

        if (empty($cache['timeout']) || current_time('timestamp') > $cache['timeout']) {
            return false; // Cache is expired
        }

        return json_decode($cache['value']);
    }

    public function set_version_info_cache($value = '', $cache_key = '')
    {
        if (empty($cache_key)) {
            $cache_key = $this->cache_key;
        }

        $data = array(
            'timeout' => strtotime('+3 hours', current_time('timestamp')),
            'value' => json_encode($value),
        );

        update_option($cache_key, $data, 'no');
    }

    /**
     * Returns if the SSL of the store should be verified.
     *
     * @since  1.6.13
     * @return bool
     */
    private function verify_ssl()
    {
        return (bool) apply_filters('edd_sl_api_request_verify_ssl', true, $this);
    }
}
