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<?php namespace BulkWP\BulkDelete; /** * Autoloader for Bulk Delete, based on the PSR-4 general purpose implementation. * * @see http://www.php-fig.org/psr/psr-4/ * * This differs from WordPress coding standard in the following ways. * * - Class name and directory names use Snake case. * - Use of namespaces. * * Given a foo-bar package of classes in the file system at the following * paths ... * * /path/to/packages/foo-bar/ * src/ * Baz.php # Foo\Bar\Baz * Qux/ * Quux.php # Foo\Bar\Qux\Quux * tests/ * BazTest.php # Foo\Bar\BazTest * Qux/ * QuuxTest.php # Foo\Bar\Qux\QuuxTest * * ... add the path to the class files for the \Foo\Bar\ namespace prefix * as follows: * * <?php * // instantiate the loader * $loader = new \BulkWP\BulkDelete\BulkDeleteAutoloader; * * // register the autoloader * $loader->register(); * * // register the base directories for the namespace prefix * $loader->addNamespace('Foo\Bar', '/path/to/packages/foo-bar/src'); * $loader->addNamespace('Foo\Bar', '/path/to/packages/foo-bar/tests'); * * The following line would cause the autoloader to attempt to load the * \Foo\Bar\Qux\Quux class from /path/to/packages/foo-bar/src/Qux/Quux.php: * * <?php * new \Foo\Bar\Qux\Quux; * * The following line would cause the autoloader to attempt to load the * \Foo\Bar\Qux\QuuxTest class from /path/to/packages/foo-bar/tests/Qux/QuuxTest.php: * * <?php * new \Foo\Bar\Qux\QuuxTest; * @since 6.0.0 / class BulkDeleteAutoloader { /* * An associative array where the key is a namespace prefix and the value * is an array of base directories for classes in that namespace. * * @var array / protected $prefixes = array(); /* * An associative array containing the list files that needs to be autoloaded. * * @var array / protected $files = array(); protected $custom_class_map = array(); /* * Register loader with SPL autoloader stack. * * @return void / public function register() { spl_autoload_register( array( $this, 'load_class' ) ); // file exists check is already done in `add_file`. foreach ( $this->files as $file ) { $this->require_file( $file ); } } /* * Adds a base directory for a namespace prefix. * * @param string $prefix The namespace prefix. * @param string $base_dir A base directory for class files in the * namespace. * @param bool $prepend If true, prepend the base directory to the stack * instead of appending it; this causes it to be searched first rather * than last. * * @return void / public function add_namespace( $prefix, $base_dir, $prepend = false ) { // normalize namespace prefix. $prefix = trim( $prefix, '\\' ) . '\\'; // normalize the base directory with a trailing separator. $base_dir = rtrim( $base_dir, DIRECTORY_SEPARATOR ) . '/'; // initialize the namespace prefix array. if ( false === isset( $this->prefixes[ $prefix ] ) ) { $this->prefixes[ $prefix ] = array(); } // retain the base directory for the namespace prefix. if ( $prepend ) { array_unshift( $this->prefixes[ $prefix ], $base_dir ); } else { array_push( $this->prefixes[ $prefix ], $base_dir ); } } /* * Add a file to be autoloaded. * * @param string $filename File to be autoloaded. / public function add_file( $filename ) { if ( ! in_array( $filename, $this->files, true ) ) { $this->files[] = $filename; } } /* * Loads the class file for a given class name. * * @param string $class The fully-qualified class name. * * @return false\|string The mapped file name on success, or boolean false on * failure. / public function load_class( $class ) { if ( array_key_exists( $class, $this->custom_class_map ) ) { $file_loaded = $this->require_file( $this->custom_class_map[ $class ] ); if ( $file_loaded ) { return true; } } // the current namespace prefix. $prefix = $class; // work backwards through the namespace names of the fully-qualified class name to find a mapped file name. while ( false !== $pos = strrpos( $prefix, '\\' ) ) { // retain the trailing namespace separator in the prefix. $prefix = substr( $class, 0, $pos + 1 ); // the rest is the relative class name. $relative_class = substr( $class, $pos + 1 ); // try to load a mapped file for the prefix and relative class. $mapped_file = $this->load_mapped_file( $prefix, $relative_class ); if ( $mapped_file !== false ) { return $mapped_file; } // remove the trailing namespace separator for the next iteration // of strrpos(). $prefix = rtrim( $prefix, '\\' ); } // never found a mapped file. return false; } /* * Load the mapped file for a namespace prefix and relative class. * * @param string $prefix The namespace prefix. * @param string $relative_class The relative class name. * * @return false\|string Boolean false if no mapped file can be loaded, or the * name of the mapped file that was loaded. / protected function load_mapped_file( $prefix, $relative_class ) { // are there any base directories for this namespace prefix? if ( false === isset( $this->prefixes[ $prefix ] ) ) { return false; } // look through base directories for this namespace prefix. foreach ( $this->prefixes[ $prefix ] as $base_dir ) { // replace the namespace prefix with the base directory, // replace namespace separators with directory separators // in the relative class name, append with .php. $file = $base_dir . str_replace( '\\', '/', $relative_class ) . '.php'; // if the mapped file exists, require it. if ( $this->require_file( $file ) ) { // yes, we're done. return $file; } } // never found it. return false; } /* * If a file exists, require it from the file system. * * @param string $file The file to require. * * @return bool True if the file exists, false if not. */ protected function require_file( $file ) { if ( file_exists( $file ) ) { require_once $file; return true; } return false; } public function set_custom_mapping( $custom_class_map ) { $this->custom_class_map = $custom_class_map; } }

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