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<?php |
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if ( ! defined( 'ABSPATH' ) ) { |
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exit; |
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} |
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class WC_Services_Installer { |
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/** |
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* @var WC_Services_Installer |
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**/ |
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private static $instance = null; |
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static function init() { |
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if ( is_null( self::$instance ) ) { |
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self::$instance = new WC_Services_Installer(); |
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} |
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return self::$instance; |
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} |
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public function __construct() { |
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add_action( 'admin_init', array( $this, 'add_error_notice' ) ); |
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add_action( 'admin_init', array( $this, 'try_install' ) ); |
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} |
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/** |
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* Verify the intent to install WooCommerce Services, and kick off installation. |
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*/ |
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public function try_install() { |
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if ( isset( $_GET['wc-services-action'] ) && ( 'install' === $_GET['wc-services-action'] ) ) { |
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check_admin_referer( 'wc-services-install' ); |
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if ( ! current_user_can( 'install_plugins' ) ) { |
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return; |
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} |
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$result = $this->install(); |
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$redirect = wp_get_referer(); |
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if ( false === $result ) { |
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$redirect = add_query_arg( 'wc-services-install-error', true, $redirect ); |
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} |
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wp_safe_redirect( $redirect ); |
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exit; |
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} |
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} |
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/** |
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* Set up installation error admin notice. |
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*/ |
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public function add_error_notice() { |
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if ( ! empty( $_GET['wc-services-install-error'] ) ) { |
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add_action( 'admin_notices', array( $this, 'error_notice' ) ); |
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} |
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} |
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/** |
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* Notify the user that the installation of WooCommerce Services failed. |
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*/ |
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public function error_notice() { |
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?> |
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<div class="notice notice-error is-dismissible"> |
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<p><?php _e( 'There was an error installing WooCommerce Services.', 'jetpack' ); ?></p> |
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</div> |
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<?php |
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} |
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/** |
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* Download, install, and activate the WooCommerce Services plugin. |
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* |
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* @return bool result of installation/activation |
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*/ |
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private function install() { |
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include_once( ABSPATH . '/wp-admin/includes/admin.php' ); |
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include_once( ABSPATH . '/wp-admin/includes/plugin-install.php' ); |
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include_once( ABSPATH . '/wp-admin/includes/plugin.php' ); |
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include_once( ABSPATH . '/wp-admin/includes/class-wp-upgrader.php' ); |
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include_once( ABSPATH . '/wp-admin/includes/class-plugin-upgrader.php' ); |
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$api = plugins_api( 'plugin_information', array( 'slug' => 'woocommerce-services' ) ); |
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if ( is_wp_error( $api ) ) { |
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return false; |
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} |
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$upgrader = new Plugin_Upgrader( new Automatic_Upgrader_Skin() ); |
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$result = $upgrader->install( $api->download_link ); |
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if ( true !== $result ) { |
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return false; |
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} |
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$result = activate_plugin( 'woocommerce-services/woocommerce-services.php' ); |
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// activate_plugin() returns null on success |
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return is_null( $result ); |
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} |
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} |
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WC_Services_Installer::init(); |
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Automattic /
jetpack
An exit expression should only be used in rare cases. For example, if you write a short command line script.
In most cases however, using an
exitexpression makes the code untestable and often causes incompatibilities with other libraries. Thus, unless you are absolutely sure it is required here, we recommend to refactor your code to avoid its usage.