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<?php
/**
 * Popup Maker Extension Updater
 *
 * @package   PopupMaker
 * @copyright Copyright (c) 2024, Code Atlantic LLC
 */

// Exit if accessed directly.
defined( 'ABSPATH' ) || exit;

/**
 * Allows paid/commercial extensions to update from our own servers.
 *
 * Note for wordpress.org admins. This is not called in the free hosted version and is simply used for hooking in addons to one update system rather than including it in each plugin.
 *
 * @author Easy Digital Downloads
 * @version 1.9.2
 */
class PUM_Extension_Updater {

	/**
	 * The plugin file.
	 *
	 * @var string
	 */
	private $api_url = '';

	/**
	 * Array of plugin api data.
	 *
	 * @var array
	 */
	private $api_data = [];

	/**
	 * The plugin file.
	 *
	 * @var string
	 */
	private $plugin_file = '';

	/**
	 * The plugin name.
	 *
	 * @var string
	 */
	private $name = '';

	/**
	 * The plugin slug.
	 *
	 * @var string
	 */
	private $slug = '';

	/**
	 * The plugin version.
	 *
	 * @var string
	 */
	private $version = '';

	/**
	 * WP override boolean.
	 *
	 * @var bool
	 */
	private $wp_override = false;

	/**
	 * Allow beta updates.
	 *
	 * @var bool
	 */
	private $beta = false;

	/**
	 * Failed request cache key.
	 *
	 * @var string
	 */
	private $failed_request_cache_key;

	/**
	 * 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( dirname( $_plugin_file ) );
		$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->failed_request_cache_key = 'edd_sl_failed_http_' . md5( $this->api_url );

		$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', [ $this, 'check_update' ] );
		add_filter( 'plugins_api', [ $this, 'plugins_api_filter' ], 10, 3 );
		add_action( 'after_plugin_row', [ $this, 'show_update_notification' ], 10, 2 );
		add_action( 'admin_init', [ $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 ) {
		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_update_transient_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',
				[
					'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;
			$version_info->tested = $this->get_tested_version( $version_info );

			if ( ! isset( $version_info->requires ) ) {
				$version_info->requires = '';
			}
			if ( ! isset( $version_info->requires_php ) ) {
				$version_info->requires_php = '';
			}

			$this->set_version_info_cache( $version_info );
		}

		return $version_info;
	}

	/**
	 * Gets a limited set of data from the API response.
	 * This is used for the update_plugins transient.
	 *
	 * @since 3.8.12
	 * @return \stdClass|false
	 */
	private function get_update_transient_data() {
		$version_info = $this->get_repo_api_data();

		if ( ! $version_info ) {
			return false;
		}

		$limited_data               = new \stdClass();
		$limited_data->slug         = $this->slug;
		$limited_data->plugin       = $this->name;
		$limited_data->url          = isset( $version_info->url ) ? $version_info->url : '';
		$limited_data->package      = isset( $version_info->package ) ? $version_info->package : '';
		$limited_data->icons        = isset( $version_info->icons ) ? $this->convert_object_to_array( $version_info->icons ) : [];
		$limited_data->banners      = isset( $version_info->banners ) ? $this->convert_object_to_array( $version_info->banners ) : [];
		$limited_data->new_version  = isset( $version_info->new_version ) ? $version_info->new_version : '';
		$limited_data->tested       = isset( $version_info->tested ) ? $version_info->tested : '';
		$limited_data->requires     = isset( $version_info->requires ) ? $version_info->requires : '';
		$limited_data->requires_php = isset( $version_info->requires_php ) ? $version_info->requires_php : '';

		return $limited_data;
	}

	/**
	 * Gets the plugin's tested version.
	 *
	 * @since 1.9.2
	 * @param object $version_info The plugin's version info.
	 * @return null|string
	 */
	private function get_tested_version( $version_info ) {

		// There is no tested version.
		if ( empty( $version_info->tested ) ) {
			return null;
		}

		// Strip off extra version data so the result is x.y or x.y.z.
		list( $current_wp_version ) = explode( '-', get_bloginfo( 'version' ) );

		// The tested version is greater than or equal to the current WP version, no need to do anything.
		if ( version_compare( $version_info->tested, $current_wp_version, '>=' ) ) {
			return $version_info->tested;
		}
		$current_version_parts = explode( '.', $current_wp_version );
		$tested_parts          = explode( '.', $version_info->tested );

		// The current WordPress version is x.y.z, so update the tested version to match it.
		if ( isset( $current_version_parts[2] ) && $current_version_parts[0] === $tested_parts[0] && $current_version_parts[1] === $tested_parts[1] ) {
			$tested_parts[2] = $current_version_parts[2];
		}

		return implode( '.', $tested_parts );
	}

	/**
	 * Show the update notification on multisite subsites.
	 *
	 * @param string $file Plugin file.
	 * @param array  $plugin Plugin data.
	 */
	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;
		}

		// Allow single site admins to see that an update is available.
		if ( ! current_user_can( 'activate_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">',
			esc_attr( $this->slug ),
			esc_attr( $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(
				[
					'edd_sl_action' => 'view_plugin_changelog',
					'plugin'        => rawurlencode( $this->name ),
					'slug'          => rawurlencode( $this->slug ),
					'TB_iframe'     => 'true',
					'width'         => 77,
					'height'        => 911,
				],
				self_admin_url( 'index.php' )
			);
		}
		$update_link = add_query_arg(
			[
				'action' => 'upgrade-plugin',
				'plugin' => rawurlencode( $this->name ),
			],
			self_admin_url( 'update.php' )
		);

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

		if ( ! current_user_can( 'update_plugins' ) ) {
			echo ' ';
			esc_html_e( 'Contact your network administrator to install the update.', 'popup-maker' );
		} elseif ( empty( $update_cache->response[ $this->name ]->package ) && ! empty( $changelog_link ) ) {
			echo ' ';
			printf(
				/* translators: 1. opening anchor tag, do not translate 2. the new plugin version 3. closing anchor tag, do not translate. */
				wp_kses_post( __( '%1$sView version %2$s details%3$s.', 'popup-maker' ) ),
				'<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( $changelog_link ) ) {
			echo ' ';
			printf(
				/* translators: 1. opening anchor tag, do not translate 2. the new plugin version 3. closing anchor tag, do not translate 4. opening anchor tag, do not translate 5. closing anchor tag, do not translate</a>. */
				wp_kses_post( __( '%1$sView version %2$s details%3$s or %4$supdate now%5$s.', 'popup-maker' ) ),
				'<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.', 'popup-maker' ),
				'</a>'
			);
		}

		// phpcs:ignore WordPress.NamingConventions.ValidHookName.UseUnderscores
		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 Plugin data.
	 * @param string $_action The type of information being requested from the Plugin Installation API.
	 * @param object $_args Plugin API arguments.
	 * @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 = [
			'slug'   => $this->slug,
			'is_ssl' => is_ssl(),
			'fields' => [
				'banners' => [],
				'reviews' => false,
				'icons'   => [],
			],
		];

		// 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;
		}

		if ( ! isset( $_data->version ) && ! empty( $_data->new_version ) ) {
			$_data->version = $_data->new_version;
		}

		return $_data;
	}

	/**
	 * Convert some objects to arrays when injecting data into the update API
	 *
	 * Some data like sections, banners, and icons are expected to be an associative array, however due to the JSON
	 * decoding, they are objects. This method allows us to pass in the object and return an associative array.
	 *
	 * @since 3.6.5
	 *
	 * @param stdClass $data The object to convert to an array.
	 *
	 * @return array
	 */
	private function convert_object_to_array( $data ) {
		if ( ! is_array( $data ) && ! is_object( $data ) ) {
			return [];
		}
		$new_data = [];
		foreach ( $data as $key => $value ) {
			$new_data[ $key ] = is_object( $value ) ? $this->convert_object_to_array( $value ) : $value;
		}

		return $new_data;
	}

	/**
	 * Disable SSL verification in order to prevent download update failures
	 *
	 * @param array  $args Args to be passed to wp_remote_get.
	 * @param string $url Url string.
	 * @return object $array
	 */
	public function http_request_args( $args, $url ) {

		if ( strpos( $url, 'https://' ) !== false && strpos( $url, 'edd_action=package_download' ) ) {
			$args['sslverify'] = $this->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|void
	 */
	private function api_request( $_action, $_data ) {
		$data = array_merge( $this->api_data, $_data );

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

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

		if ( $this->request_recently_failed() ) {
			return false;
		}

		return $this->get_version_from_remote();
	}

	/**
	 * Determines if a request has recently failed.
	 *
	 * @since 1.9.1
	 *
	 * @return bool
	 */
	private function request_recently_failed() {
		$failed_request_details = get_option( $this->failed_request_cache_key );

		// Request has never failed.
		if ( empty( $failed_request_details ) || ! is_numeric( $failed_request_details ) ) {
			return false;
		}

		/*
		 * Request previously failed, but the timeout has expired.
		 * This means we're allowed to try again.
		 */
		if ( time() > $failed_request_details ) {
			delete_option( $this->failed_request_cache_key );

			return false;
		}

		return true;
	}

	/**
	 * Logs a failed HTTP request for this API URL.
	 * We set a timestamp for 1 hour from now. This prevents future API requests from being
	 * made to this domain for 1 hour. Once the timestamp is in the past, API requests
	 * will be allowed again. This way if the site is down for some reason we don't bombard
	 * it with failed API requests.
	 *
	 * @see EDD_SL_Plugin_Updater::request_recently_failed
	 *
	 * @since 1.9.1
	 */
	private function log_failed_request() {
		update_option( $this->failed_request_cache_key, strtotime( '+1 hour' ) );
	}

	/**
	 * If available, show the changelog for sites in a multisite install.
	 */
	public function show_changelog() {
		// phpcs:disable WordPress.Security.NonceVerification.Recommended

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

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

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

		// phpcs:enable WordPress.Security.NonceVerification.Recommended

		if ( ! current_user_can( 'update_plugins' ) ) {
			wp_die( esc_html__( 'You do not have permission to install plugin updates', 'popup-maker' ), esc_html__( 'Error', 'popup-maker' ), [ 'response' => 403 ] );
		}

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

		exit;
	}

	/**
	 * Gets the current version information from the remote site.
	 *
	 * @return array|false
	 */
	private function get_version_from_remote() {
		$api_params = [
			'edd_action'  => 'get_version',
			'license'     => ! empty( $this->api_data['license'] ) ? $this->api_data['license'] : '',
			'item_name'   => isset( $this->api_data['item_name'] ) ? $this->api_data['item_name'] : false,
			'item_id'     => isset( $this->api_data['item_id'] ) ? $this->api_data['item_id'] : false,
			'version'     => isset( $this->api_data['version'] ) ? $this->api_data['version'] : false,
			'slug'        => $this->slug,
			'author'      => $this->api_data['author'],
			'url'         => home_url(),
			'beta'        => $this->beta,
			'php_version' => phpversion(),
			'wp_version'  => get_bloginfo( 'version' ),
		];

		/**
		 * Filters the parameters sent in the API request.
		 *
		 * @param array  $api_params  The array of data sent in the request.
		 * @param array  $api_data    The array of data set up in the class constructor.
		 * @param string $plugin_file The full path and filename of the file.
		 */
		$api_params = apply_filters( 'edd_sl_plugin_updater_api_params', $api_params, $this->api_data, $this->plugin_file );

		$request = wp_remote_get(// Uses wp_remote_post() in EDD Sample.
			$this->api_url,
			[
				'timeout'   => 15,
				'sslverify' => $this->verify_ssl(),
				'body'      => $api_params,
			]
		);

		if ( is_wp_error( $request ) || ( 200 !== wp_remote_retrieve_response_code( $request ) ) ) {
			$this->log_failed_request();

			return false;
		}

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

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

		return $request;
	}

	/**
	 * Get the version info from the cache, if it exists.
	 *
	 * @param string $cache_key Cache key.
	 * @return false|object
	 */
	public function get_cached_version_info( $cache_key = '' ) {

		if ( empty( $cache_key ) ) {
			$cache_key = $this->get_cache_key();
		}

		$cache = get_option( $cache_key );

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

		// We need to turn the icons into an array, thanks to WP Core forcing these into an object at some point.
		$cache['value'] = json_decode( $cache['value'] );
		if ( ! empty( $cache['value']->icons ) ) {
			$cache['value']->icons = (array) $cache['value']->icons;
		}

		return $cache['value'];
	}

	/**
	 * Adds the plugin version information to the database.
	 *
	 * @param string $value Value.
	 * @param string $cache_key Cache key.
	 */
	public function set_version_info_cache( $value = '', $cache_key = '' ) {

		if ( empty( $cache_key ) ) {
			$cache_key = $this->get_cache_key();
		}

		$data = [
			'timeout' => strtotime( '+3 hours', time() ),
			'value'   => wp_json_encode( $value ),
		];

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

		// Delete the duplicate option.
		delete_option( 'edd_api_request_' . md5( maybe_serialize( $this->slug . $this->api_data['license'] . $this->beta ) ) );
	}

	/**
	 * 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 );
	}

	/**
	 * Gets the unique key (option name) for a plugin.
	 *
	 * @since 1.9.0
	 * @return string
	 */
	private function get_cache_key() {
		$string = $this->slug . $this->api_data['license'] . $this->beta;

		return 'edd_sl_' . md5( maybe_serialize( $string ) );
	}
}