<?php

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

/**
 * Allows plugins to use their own update API.
 *
 * @author Easy Digital Downloads
 * @version 1.9.0
 */
class GeneratePress_Premium_Plugin_Updater {

	private $api_url              = '';
	private $api_data             = array();
	private $plugin_file          = '';
	private $name                 = '';
	private $slug                 = '';
	private $version              = '';
	private $wp_override          = false;
	private $beta                 = false;
	private $health_check_timeout = 5;

	/**
	 * 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->plugin_file = $_plugin_file;
		$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;

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

		/**
		 * Fires after the $edd_plugin_data is setup.
		 *
		 * @since x.x.x
		 *
		 * @param array $edd_plugin_data Array of EDD SL plugin data.
		 */
		do_action( 'post_edd_sl_plugin_updater_setup', $edd_plugin_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 );
		add_action( 'after_plugin_row', 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 ( ! empty( $_transient_data->response ) && ! empty( $_transient_data->response[ $this->name ] ) && false === $this->wp_override ) {
			return $_transient_data;
		}

		$current = $this->get_repo_api_data();
		if ( false !== $current && is_object( $current ) && isset( $current->new_version ) ) {
			if ( version_compare( $this->version, $current->new_version, '<' ) ) {
				$_transient_data->response[ $this->name ] = $current;
			} else {
				// Populating the no_update information is required to support auto-updates in WordPress 5.5.
				$_transient_data->no_update[ $this->name ] = $current;
			}
		}
		$_transient_data->last_checked           = time();
		$_transient_data->checked[ $this->name ] = $this->version;

		return $_transient_data;
	}

	/**
	 * Get repo API data from store.
	 * Save to cache.
	 *
	 * @return \stdClass
	 */
	public function get_repo_api_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,
				)
			);
			if ( ! $version_info ) {
				return false;
			}

			// This is required for your plugin to support auto-updates in WordPress 5.5.
			$version_info->plugin = $this->name;
			$version_info->id     = $this->name;

			$this->set_version_info_cache( $version_info );
		}

		return $version_info;
	}

	/**
	 * Show the update notification on multisite subsites.
	 *
	 * @param string  $file
	 * @param array   $plugin
	 */
	public function show_update_notification( $file, $plugin ) {

		// Return early if in the network admin, or if this is not a multisite install.
		if ( is_network_admin() || ! is_multisite() ) {
			return;
		}

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

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

		// Do not print any message if update does not exist.
		$update_cache = get_site_transient( 'update_plugins' );

		if ( ! isset( $update_cache->response[ $this->name ] ) ) {
			if ( ! is_object( $update_cache ) ) {
				$update_cache = new stdClass();
			}
			$update_cache->response[ $this->name ] = $this->get_repo_api_data();
		}

		// Return early if this plugin isn't in the transient->response or if the site is running the current or newer version of the plugin.
		if ( empty( $update_cache->response[ $this->name ] ) || version_compare( $this->version, $update_cache->response[ $this->name ]->new_version, '>=' ) ) {
			return;
		}

		printf(
			'<tr class="plugin-update-tr %3$s" id="%1$s-update" data-slug="%1$s" data-plugin="%2$s">',
			$this->slug,
			$file,
			in_array( $this->name, $this->get_active_plugins(), true ) ? 'active' : 'inactive'
		);

		echo '<td colspan="3" class="plugin-update colspanchange">';
		echo '<div class="update-message notice inline notice-warning notice-alt"><p>';

		$changelog_link = '';
		if ( ! empty( $update_cache->response[ $this->name ]->sections->changelog ) ) {
			$changelog_link = add_query_arg(
				array(
					'edd_sl_action' => 'view_plugin_changelog',
					'plugin'        => urlencode( $this->name ),
					'slug'          => urlencode( $this->slug ),
					'TB_iframe'     => 'true',
					'width'         => 77,
					'height'        => 911,
				),
				self_admin_url( 'index.php' )
			);
		}
		$update_link = add_query_arg(
			array(
				'action' => 'upgrade-plugin',
				'plugin' => urlencode( $this->name ),
			),
			self_admin_url( 'update.php' )
		);

		printf(
			/* translators: the plugin name. */
			esc_html__( 'There is a new version of %1$s available.', 'easy-digital-downloads' ),
			esc_html( $plugin['Name'] )
		);

		if ( empty( $update_cache->response[ $this->name ]->package ) && ! empty( $changelog_link ) ) {
			printf(
				/* translators: 1. opening anchor tag, do not translate 2. the new plugin version 3. closing anchor tag, do not translate. */
				__( ' %1$sView version %2$s details%3$s.', 'easy-digital-downloads' ),
				'<a target="_blank" class="thickbox open-plugin-details-modal" href="' . esc_url( $changelog_link ) . '">',
				esc_html( $update_cache->response[ $this->name ]->new_version ),
				'</a>'
			);
		} elseif ( ! empty( $changelog_link ) ) {
			printf(
				__( ' %1$sView version %2$s details%3$s or %4$supdate now%5$s.', 'easy-digital-downloads' ),
				'<a target="_blank" class="thickbox open-plugin-details-modal" href="' . esc_url( $changelog_link ) . '">',
				esc_html( $update_cache->response[ $this->name ]->new_version ),
				'</a>',
				'<a target="_blank" class="update-link" href="' . esc_url( wp_nonce_url( $update_link, 'upgrade-plugin_' . $file ) ) . '">',
				'</a>'
			);
		} else {
			printf(
				' %1$s%2$s%3$s',
				'<a target="_blank" class="update-link" href="' . esc_url( wp_nonce_url( $update_link, 'upgrade-plugin_' . $file ) ) . '">',
				esc_html__( 'Update now.', 'easy-digital-downloads' ),
				'</a>'
			);
		}

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

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

	/**
	 * Gets the plugins active in a multisite network.
	 *
	 * @return array
	 */
	private function get_active_plugins() {
		$active_plugins         = (array) get_option( 'active_plugins' );
		$active_network_plugins = (array) get_site_option( 'active_sitewide_plugins' );

		return array_merge( $active_plugins, array_keys( $active_network_plugins ) );
	}

	/**
	 * 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 ( 'plugin_information' !== $_action ) {

			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,
				'icons'   => array(),
			),
		);

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

		//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 );

			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 ) ) {
			$_data->sections = $this->convert_object_to_array( $_data->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 ) ) {
			$_data->banners = $this->convert_object_to_array( $_data->banners );
		}

		// Convert icons into an associative array, since we're getting an object, but Core expects an array.
		if ( isset( $_data->icons ) && ! is_array( $_data->icons ) ) {
			$_data->icons = $this->convert_object_to_array( $_data->icons );
		}

		// Convert contributors into an associative array, since we're getting an object, but Core expects an array.
		if ( isset( $_data->contributors ) && ! is_array( $_data->contributors ) ) {
			$_data->contributors = $this->convert_object_to_array( $_data->contributors );
		}

		if ( ! isset( $_data->plugin ) ) {
			$_data->plugin = $this->name;
		}

		return $_data;