289 lines
7.3 KiB
PHP
289 lines
7.3 KiB
PHP
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<?php
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/**
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* Class Plugin_Base
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*
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* @package ShareThisShareButtons
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*/
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namespace ShareThisShareButtons;
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/**
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* Class Plugin_Base
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*
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* @package ShareThisShareButtons
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*/
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abstract class Plugin_Base {
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/**
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* Plugin config.
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*
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* @var array
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*/
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public $config = array();
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/**
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* Plugin slug.
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*
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* @var string
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*/
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public $slug;
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/**
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* Plugin directory path.
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*
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* @var string
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*/
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public $dir_path;
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/**
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* Plugin directory URL.
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*
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* @var string
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*/
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public $dir_url;
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/**
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* Directory in plugin containing autoloaded classes.
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*
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* @var string
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*/
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protected $autoload_class_dir = 'php';
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/**
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* Autoload matches cache.
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*
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* @var array
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*/
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protected $autoload_matches_cache = array();
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/**
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* Required instead of a static variable inside the add_doc_hooks method
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* for the sake of unit testing.
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*
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* @var array
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*/
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protected $called_doc_hooks = array();
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/**
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* Plugin_Base constructor.
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*/
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public function __construct() {
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$location = $this->locate_plugin();
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$this->slug = $location['dir_basename'];
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$this->dir_path = $location['dir_path'];
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$this->dir_url = $location['dir_url'];
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spl_autoload_register( array( $this, 'autoload' ) );
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$this->add_doc_hooks();
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}
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/**
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* Plugin_Base destructor.
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*/
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public function __destruct() {
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$this->remove_doc_hooks();
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}
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/**
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* Get reflection object for this class.
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*
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* @return \ReflectionObject
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*/
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public function get_object_reflection() {
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static $reflection;
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if ( empty( $reflection ) ) {
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$reflection = new \ReflectionObject( $this );
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}
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return $reflection;
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}
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/**
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* Autoload for classes that are in the same namespace as $this.
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*
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* @param string $class Class name.
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* @return void
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*/
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public function autoload( $class ) {
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if ( ! isset( $this->autoload_matches_cache[ $class ] ) ) {
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if ( ! preg_match( '/^(?P<namespace>.+)\\\\(?P<class>[^\\\\]+)$/', $class, $matches ) ) {
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$matches = false;
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}
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$this->autoload_matches_cache[ $class ] = $matches;
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} else {
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$matches = $this->autoload_matches_cache[ $class ];
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}
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if ( empty( $matches ) ) {
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return;
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}
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if ( $this->get_object_reflection()->getNamespaceName() !== $matches['namespace'] ) {
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return;
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}
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$class_name = $matches['class'];
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$class_path = \trailingslashit( $this->dir_path );
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if ( $this->autoload_class_dir ) {
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$class_path .= \trailingslashit( $this->autoload_class_dir );
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}
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$class_path .= sprintf( 'class-%s.php', strtolower( str_replace( '_', '-', $class_name ) ) );
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if ( is_readable( $class_path ) ) {
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require_once $class_path;
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}
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}
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/**
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* Version of plugin_dir_url() which works for plugins installed in the plugins directory,
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* and for plugins bundled with themes.
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*
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* @return array
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*/
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public function locate_plugin() {
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$dir_url = trailingslashit( substr( plugins_url( '', __FILE__ ), 0, - 4 ) );
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$dir_path = trailingslashit( substr( __DIR__, 0, - 4 ) );
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$dir_basename = basename( $dir_path );
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return compact( 'dir_url', 'dir_path', 'dir_basename' );
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}
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/**
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* Hooks a function on to a specific filter.
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*
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* @param string $name The hook name.
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* @param array $callback The class object and method.
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* @param array $args An array with priority and arg_count.
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*
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* @return mixed
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*/
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public function add_filter( $name, $callback, $args = array() ) {
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// Merge defaults.
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$args = array_merge(
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array(
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'priority' => 10,
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'arg_count' => PHP_INT_MAX,
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),
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$args
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);
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return $this->add_hook( 'filter', $name, $callback, $args );
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}
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/**
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* Hooks a function on to a specific action.
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*
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* @param string $name The hook name.
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* @param array $callback The class object and method.
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* @param array $args An array with priority and arg_count.
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*
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* @return mixed
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*/
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public function add_action( $name, $callback, $args = array() ) {
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// Merge defaults.
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$args = array_merge(
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array(
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'priority' => 1,
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'arg_count' => PHP_INT_MAX,
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),
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$args
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);
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return $this->add_hook( 'action', $name, $callback, $args );
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}
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/**
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* Hooks a function on to a specific shortcode.
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*
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* @param string $name The shortcode name.
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* @param array $callback The class object and method.
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*
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* @return mixed
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*/
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public function add_shortcode( $name, $callback ) {
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return $this->add_hook( 'shortcode', $name, $callback );
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}
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/**
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* Hooks a function on to a specific action/filter.
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*
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* @param string $type The hook type. Options are action/filter.
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* @param string $name The hook name.
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* @param array $callback The class object and method.
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* @param array $args An array with priority and arg_count.
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*
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* @return mixed
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*/
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protected function add_hook( $type, $name, $callback, $args = array() ) {
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$priority = isset( $args['priority'] ) ? $args['priority'] : 10;
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$arg_count = isset( $args['arg_count'] ) ? $args['arg_count'] : PHP_INT_MAX;
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$fn = sprintf( '\add_%s', $type );
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$retval = \call_user_func( $fn, $name, $callback, $priority, $arg_count );
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return $retval;
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}
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/**
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* Add actions/filters/shortcodes from the methods of a class based on DocBlocks.
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*
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* @param object $object The class object.
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*/
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public function add_doc_hooks( $object = null ) {
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if ( is_null( $object ) ) {
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$object = $this;
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}
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$class_name = get_class( $object );
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if ( isset( $this->called_doc_hooks[ $class_name ] ) ) {
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$notice = sprintf( 'The add_doc_hooks method was already called on %s. Note that the Plugin_Base constructor automatically calls this method.', $class_name );
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// @codingStandardsIgnoreStart
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trigger_error( esc_html( $notice ), \E_USER_NOTICE );
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// @codingStandardsIgnoreEnd
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return;
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}
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$this->called_doc_hooks[ $class_name ] = true;
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$reflector = new \ReflectionObject( $object );
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foreach ( $reflector->getMethods() as $method ) {
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$doc = $method->getDocComment();
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$arg_count = $method->getNumberOfParameters();
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if ( preg_match_all( '#\* @(?P<type>filter|action|shortcode)\s+(?P<name>[a-z0-9\-\._]+)(?:,\s+(?P<priority>\d+))?#', $doc, $matches, PREG_SET_ORDER ) ) {
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foreach ( $matches as $match ) {
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$type = $match['type'];
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$name = $match['name'];
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$priority = empty( $match['priority'] ) ? 10 : intval( $match['priority'] );
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$callback = array( $object, $method->getName() );
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call_user_func( array( $this, "add_{$type}" ), $name, $callback, compact( 'priority', 'arg_count' ) );
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}
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}
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}
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}
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/**
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* Removes the added DocBlock hooks.
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*
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* @param object $object The class object.
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*/
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public function remove_doc_hooks( $object = null ) {
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if ( is_null( $object ) ) {
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$object = $this;
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}
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$class_name = get_class( $object );
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$reflector = new \ReflectionObject( $object );
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foreach ( $reflector->getMethods() as $method ) {
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$doc = $method->getDocComment();
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if ( preg_match_all( '#\* @(?P<type>filter|action|shortcode)\s+(?P<name>[a-z0-9\-\._]+)(?:,\s+(?P<priority>\d+))?#', $doc, $matches, PREG_SET_ORDER ) ) {
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foreach ( $matches as $match ) {
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$type = $match['type'];
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$name = $match['name'];
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$priority = empty( $match['priority'] ) ? 10 : intval( $match['priority'] );
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$callback = array( $object, $method->getName() );
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call_user_func( "remove_{$type}", $name, $callback, $priority );
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}
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}
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}
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unset( $this->called_doc_hooks[ $class_name ] );
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}
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}
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