Underscore.php
140 lines
| 1 | <?php |
| 2 | |
| 3 | namespace AC\Autoloader; |
| 4 | |
| 5 | use Exception; |
| 6 | |
| 7 | class Underscore { |
| 8 | |
| 9 | /** |
| 10 | * @var self; |
| 11 | */ |
| 12 | protected static $instance; |
| 13 | |
| 14 | /** |
| 15 | * Register aliases that point to a namespace |
| 16 | * @var string[] |
| 17 | */ |
| 18 | protected $aliases; |
| 19 | |
| 20 | protected function __construct() { |
| 21 | $this->aliases = []; |
| 22 | |
| 23 | spl_autoload_register( [ $this, 'autoload' ], true, true ); |
| 24 | } |
| 25 | |
| 26 | public static function instance() { |
| 27 | if ( null === self::$instance ) { |
| 28 | self::$instance = new self(); |
| 29 | } |
| 30 | |
| 31 | return self::$instance; |
| 32 | } |
| 33 | |
| 34 | /** |
| 35 | * Add a class alias |
| 36 | * |
| 37 | * @param $original |
| 38 | * @param string $alias |
| 39 | * |
| 40 | * @return Underscore |
| 41 | * @throws Exception |
| 42 | */ |
| 43 | public function add_alias( $original, $alias ) { |
| 44 | if ( strpos( $original, '/' ) ) { |
| 45 | throw new Exception( 'Namespaces use \ instead of /.' ); |
| 46 | } |
| 47 | |
| 48 | if ( ! $this->register_alias( $original, $alias ) ) { |
| 49 | throw new Exception( sprintf( 'Failed to register alias for %s', $original ) ); |
| 50 | } |
| 51 | |
| 52 | $this->aliases[ $alias ] = $original; |
| 53 | |
| 54 | return $this; |
| 55 | } |
| 56 | |
| 57 | /** |
| 58 | * Check if original exists and if so, create the class alias |
| 59 | * |
| 60 | * @param string $original |
| 61 | * @param string $alias |
| 62 | * |
| 63 | * @return bool |
| 64 | */ |
| 65 | protected function register_alias( $original, $alias ) { |
| 66 | if ( ! class_exists( $original ) && ! interface_exists( $original ) ) { |
| 67 | return false; |
| 68 | } |
| 69 | |
| 70 | class_alias( $original, $alias ); |
| 71 | |
| 72 | return true; |
| 73 | } |
| 74 | |
| 75 | /** |
| 76 | * @param $alias |
| 77 | * |
| 78 | * @return bool |
| 79 | */ |
| 80 | public function alias_exists( $alias ) { |
| 81 | return isset( $this->aliases[ $alias ] ); |
| 82 | } |
| 83 | |
| 84 | /** |
| 85 | * @param $alias |
| 86 | * |
| 87 | * @return false|string |
| 88 | */ |
| 89 | public function get_original( $alias ) { |
| 90 | if ( ! $this->alias_exists( $alias ) ) { |
| 91 | return false; |
| 92 | } |
| 93 | |
| 94 | return $this->aliases[ $alias ]; |
| 95 | } |
| 96 | |
| 97 | /** |
| 98 | * Check if the prefix is within the domain of Admin Columns |
| 99 | * |
| 100 | * @param string $alias |
| 101 | * |
| 102 | * @return bool |
| 103 | */ |
| 104 | protected function is_valid_prefix( $alias ) { |
| 105 | $prefixes = [ 'AC', 'ACP', 'ACA' ]; |
| 106 | |
| 107 | foreach ( $prefixes as $prefix ) { |
| 108 | if ( 0 === strpos( $alias, $prefix . '_' ) ) { |
| 109 | return true; |
| 110 | } |
| 111 | } |
| 112 | |
| 113 | return false; |
| 114 | } |
| 115 | |
| 116 | public function autoload( $alias ) { |
| 117 | if ( ! $this->is_valid_prefix( $alias ) ) { |
| 118 | return false; |
| 119 | } |
| 120 | |
| 121 | $original = $this->get_original( $alias ); |
| 122 | |
| 123 | if ( ! $original ) { |
| 124 | $original = str_replace( '_', '\\', $alias ); |
| 125 | |
| 126 | if ( ! $this->register_alias( $original, $alias ) ) { |
| 127 | return false; |
| 128 | } |
| 129 | } |
| 130 | |
| 131 | if ( WP_DEBUG ) { |
| 132 | $error = sprintf( '%s is a <strong>deprecated class</strong> since version %s! Use %s instead.', $alias, 4.3, $original ); |
| 133 | |
| 134 | trigger_error( $error ); |
| 135 | } |
| 136 | |
| 137 | return true; |
| 138 | } |
| 139 | |
| 140 | } |