lloc / Multisite-Language-Switcher

includes/MslsPlugin.php

<?php
/**
 * MslsPlugin
 * @author Dennis Ploetner <re@lloc.de>
 * @since 0.9.8
 */

namespace lloc\Msls;

/**
 * Provides functionalities for general hooks and activation/deactivation
 *
 * @package Msls
 */

class MslsPlugin {

	/**
	 * @var MslsOptions
	 */
	protected $options;

	/**
	 * @param MslsOptions $options
	 */
	public function __construct( MslsOptions $options ) {
		$this->options = $options;
	}

	/**
	 * Factory
	 *
	 * @codeCoverageIgnore
	 *
	 * @return MslsPlugin
	 */
	public static function init() {
		$options = MslsOptions::instance();
		$obj     = new self( $options );

		add_action( 'plugins_loaded', [ $obj, 'init_i18n_support' ] );

		register_activation_hook( MSLS_PLUGIN__FILE__, [ $obj, 'activate' ] );

		if ( function_exists( 'is_multisite' ) && is_multisite() ) {
			add_action( 'widgets_init', [ $obj, 'init_widget' ] );
			add_filter( 'the_content', [ $obj, 'content_filter' ] );
			add_action( 'wp_head', [ $obj, 'print_alternate_links' ] );

			add_filter( 'msls_get_output', [ $obj, 'get_output' ] );

			\lloc\Msls\ContentImport\Service::instance()->register();

			if ( is_admin() ) {
				add_action( 'admin_menu', [ $obj, 'admin_menu' ] );

				add_action( 'admin_menu', [ MslsAdmin::class, 'init' ] );
				add_action( 'load-post.php', [ MslsMetaBox::class, 'init' ] );
				add_action( 'load-post-new.php', [ MslsMetaBox::class, 'init' ] );
				add_action( 'load-edit.php', [ MslsCustomColumn::class, 'init' ] );
				add_action( 'load-edit.php', [ MslsCustomFilter::class, 'init' ] );

				add_action( 'load-edit-tags.php', [ MslsCustomColumnTaxonomy::class, 'init' ] );
				add_action( 'load-edit-tags.php', [ MslsPostTag::class, 'init' ] );

				if ( filter_has_var( INPUT_POST, 'action' ) ) {
					$action = filter_input( INPUT_POST, 'action', FILTER_SANITIZE_STRING );

					if ( 'add-tag' === $action ) {
						add_action( 'admin_init', [ MslsPostTag::class, 'init' ] );
					} elseif ( 'inline-save' === $action ) {
						add_action( 'admin_init', [ MslsCustomColumn::class, 'init' ] );
					} elseif ( 'inline-save-tax' === $action ) {
						add_action( 'admin_init', [ MslsCustomColumnTaxonomy::class, 'init' ] );
					}
				}

				add_action( 'wp_ajax_suggest_posts', [ MslsMetaBox::class, 'suggest' ] );
				add_action( 'wp_ajax_suggest_terms', [ MslsPostTag::class, 'suggest' ] );
			}
		}
		else {
			add_action( 'admin_notices', function () {
				self::message_handler(
					__( 'The Multisite Language Switcher needs the activation of the multisite-feature for working properly. Please read <a onclick="window.open(this.href); return false;" href="http://codex.wordpress.org/Create_A_Network">this post</a> if you don\'t know the meaning.', 'multisite-language-switcher' )
				);
			} );
		}

		return $obj;
	}

	/**
	 * @return MslsOutput
	 */
	public function get_output() {
		static $obj = null;

		if ( is_null( $obj ) ) {
			$obj = MslsOutput::init();
		}

		return $obj;
	}

	/**
	 * Callback for action wp_head
	 */
	public function print_alternate_links() {
		echo $this->get_output()->get_alternate_links(), PHP_EOL;

Expected next thing to be a escaping function, not '$this'

	}

	/**
	 * Filter for the_content()
	 *
	 * @package Msls
	 * @uses MslsOptions
	 * @param string $content
	 * @return string
	 */
	function content_filter( $content ) {
		if ( ! is_front_page() && is_singular() ) {
			$options = $this->options;

			if ( $options->is_content_filter() ) {
				$content .= $this->filter_string();
			}
		}

		return $content;
	}

	/**
	 * Create filterstring for msls_content_filter()
	 *
	 * @package Msls
	 * @uses MslsOutput
	 * @param string $pref
	 * @param string $post
	 * @return string
	 */
	function filter_string( $pref = '<p id="msls">', $post = '</p>' ) {
		$obj    = MslsOutput::init();
		$links  = $obj->get( 1, true, true );
		$output = __( 'This post is also available in %s.', 'multisite-language-switcher' );

		if ( has_filter( 'msls_filter_string' ) ) {
			/**
			 * Overrides the string for the output of the translation hint
			 * @since 1.0
			 * @param string $output
			 * @param array $links
			 */
			$output = apply_filters( 'msls_filter_string', $output, $links );
		}
		else {
			$output = '';

			if ( count( $links ) > 1 ) {
				$last   = array_pop( $links );
				$output = sprintf(
					$output,
					sprintf(
						__( '%s and %s', 'multisite-language-switcher' ),
						implode( ', ', $links ),
						$last
					)
				);
			}
			elseif ( 1 == count( $links ) ) {
				$output = sprintf(
					$output,
					$links[0]
				);
			}
		}

		return ! empty( $output ) ? $pref . $output . $post : '';
	}

	/**
	 * Loads styles and some js if needed
	 *
	 * The methiod returns true if JS is loaded or false if not
 	 *
	 * @return boolean
	 */
	public function admin_menu() {
		$postfix = defined( 'SCRIPT_DEBUG' ) && SCRIPT_DEBUG ? '' 	: '.min';

		wp_enqueue_style(
			'msls-styles',
			plugins_url( 'css/msls.css', MSLS_PLUGIN__FILE__ ),
			[],
			MSLS_PLUGIN_VERSION
		);

		if ( $this->options->activate_autocomplete ) {
			wp_enqueue_script(
				'msls-autocomplete',
				plugins_url( "js/msls{$postfix}.js", MSLS_PLUGIN__FILE__ ),
				array( 'jquery-ui-autocomplete' ),
				MSLS_PLUGIN_VERSION
			);

			return true;
		}

		return false;
	}

	/**
	 * Register widget
	 *
	 * The widget will only be registered if the current blog is not
	 * excluded in the configuration of the plugin.
	 * @return boolean
	 */
	public function init_widget() {
		if ( ! $this->options->is_excluded() ) {
			register_widget( MslsWidget::class );

			return true;
		}

		return false;
	}

	/**
	 * Load textdomain
	 *
	 * The method should be executed always on init because we have some
	 * translatable string in the frontend too.
	 *
	 * @return boolean
	 */
	public function init_i18n_support() {
		return load_plugin_textdomain(
			'multisite-language-switcher',
			false,
			dirname( MSLS_PLUGIN_PATH ) . '/languages/'
		);
	}

	/**
	 * Message handler
	 *
	 * Prints a message box to the screen.
	 * @param string $message
	 * @param string $css_class
	 * @return boolean
	 */
	public static function message_handler( $message, $css_class = 'error' ) {
		if ( ! empty( $message ) ) {
			printf(
				'<div id="msls-warning" class="%s"><p>%s</p></div>',
				$css_class,
				$message
			);

			return true;
		}

		return false;
	}

	/**
	 * Activate plugin
	 */
	public static function activate(){
		register_uninstall_hook( MSLS_PLUGIN__FILE__, [ __CLASS__, 'uninstall' ] );
	}

	/**
	 * Uninstall plugin
	 *
	 * The plugin data in all blogs of the current network will be
	 * deleted after the uninstall procedure.
	 *
	 * @return boolean
	 */
	public static function uninstall() {
		/**
		 * We want to be sure that the user has not deactivated the
		 * multisite because we need to use switch_to_blog and
		 * restore_current_blog
		 */
		if ( function_exists( 'is_multisite' ) && is_multisite() ) {
			$cache = MslsSqlCacher::init( __CLASS__ )->set_params( __METHOD__ );

			$blogs = $cache->get_results(
				$cache->prepare(
					"SELECT blog_id FROM {$cache->blogs} WHERE blog_id != %d AND site_id = %d",
					$cache->blogid,
					$cache->siteid
				)
			);

			foreach ( $blogs as $blog ) {
				switch_to_blog( $blog->blog_id );
				self::cleanup();
				restore_current_blog();
			}
		}

		return self::cleanup();
	}

	/**
	 * Cleanup the options
	 *
	 * Removes all values of the current blogs which are stored in the
	 * options-table and returns true if it was successful.
	 *
	 * @return boolean
	 */
	public static function cleanup() {
		if ( delete_option( 'msls' ) ) {
			$cache = MslsSqlCacher::init( __CLASS__ )->set_params( __METHOD__ );
			$sql   = $cache->prepare(
				"DELETE FROM {$cache->options} WHERE option_name LIKE %s",
				'msls_%'
			);

			return (bool) $cache->query( $sql );
		}

		return false;
	}

	/**
	 * Get specific vars from $_POST and $_GET in a safe way
	 * @param array $list
	 * @return array
	 */
	public static function get_superglobals( array $list ) {
		$arr = [];

		foreach ( $list as $var ) {
			$arr[ $var ] = '';

			if ( filter_has_var( INPUT_POST, $var ) ) {
				$arr[ $var ] = filter_input( INPUT_POST, $var );
			}
			elseif ( filter_has_var( INPUT_GET, $var ) ) {
				$arr[ $var ] = filter_input( INPUT_GET, $var );
			}
		}

		return $arr;
	}

}