/core/Libraries.php
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- <?php
- /**
- * li₃: the most RAD framework for PHP (http://li3.me)
- *
- * Copyright 2009, Union of RAD. All rights reserved. This source
- * code is distributed under the terms of the BSD 3-Clause License.
- * The full license text can be found in the LICENSE.txt file.
- */
- namespace lithium\core;
- use RuntimeException;
- use lithium\util\Text;
- use lithium\aop\Filters;
- use lithium\core\ConfigException;
- use lithium\core\ClassNotFoundException;
- /**
- * Manages all aspects of class and file location, naming and mapping. Implements auto-loading for
- * the Lithium core, as well as all applications, plugins and vendor libraries registered.
- * Typically, libraries and plugins are registered in `config/bootstrap/libraries.php`.
- *
- * By convention, plugins and vendor libraries are typically located in `app-path/libraries` or
- * `/libraries` (the former may override the latter). By default, `Libraries` will use its own
- * autoloader for all plugins and vendor libraries, but can be configured to use others on a
- * per-library basis.
- *
- * `Libraries` also handles service location. Various _types_ of classes can be defined by name,
- * using _class patterns_, which define conventions for organizing classes, i.e. `'models'`, which
- * maps to `'{:library}\models\{:name}'`, which will find a model class in any registered app,
- * plugin or vendor library that follows that path (namespace) convention. You can find classes by
- * name (see the `locate()` method for more information on class-locating precedence), or find all
- * models in all registered libraries (apps / plugins / vendor libraries, etc). For more information
- * on modifying the default class organization, or defining your own class types, see the `paths()`
- * method.
- *
- * #### Auto-loading classes
- *
- * Lithium defines several rules, conventions and recommendations for naming and organizing classes.
- * The autoloader itself conforms to the [PHP Interoperability Group's draft
- * specification](http://groups.google.com/group/php-standards/web/psr-0-final-proposal). While the
- * autoloader will load any classes conforming to that specification, Lithium itself follows
- * additional constraints, which are also recommended for Lithium applications, libraries and
- * extensions, and are as follows:
- *
- * - Each library must exist in a top-level vendor namespace
- * - Each top-level vendor namespace must define a set of sub-packages, and should not directly
- * contain classes
- * - Namespace names must be lowercased and under_scored
- * - Class names must be CamelCased
- *
- * Any libraries registered by calling `Libraries::add()` which follow the autoloader's will have
- * their classes automatically loaded when referenced.
- *
- * @see lithium\core\Libraries::add()
- * @see lithium\core\Libraries::locate()
- * @see lithium\core\Libraries::paths()
- */
- class Libraries {
- /**
- * The list of class libraries registered with the class loader.
- *
- * @var array
- */
- protected static $_configurations = [];
- /**
- * Contains a cascading list of search path templates, indexed by base object type.
- *
- * Used by `Libraries::locate()` to perform service location. This allows new types of
- * objects (i.e. models, helpers, cache adapters and data sources) to be automatically
- * 'discovered' when you register a new vendor library or plugin (using `Libraries::add()`).
- *
- * Because paths are checked in the order in which they appear, path templates should be
- * specified from most-specific to least-specific. See the `locate()` method for usage examples.
- *
- * @see lithium\core\Libraries::locate()
- * @see lithium\core\Libraries::paths()
- * @var array
- */
- protected static $_paths = [
- 'adapter' => [
- '{:library}\extensions\adapter\{:namespace}\{:class}\{:name}',
- '{:library}\{:namespace}\{:class}\adapter\{:name}'
- ],
- 'command' => [
- '{:library}\extensions\command\{:namespace}\{:class}\{:name}',
- '{:library}\console\command\{:namespace}\{:class}\{:name}'
- ],
- 'controllers' => [
- '{:library}\controllers\{:namespace}\{:class}\{:name}Controller'
- ],
- 'data' => [
- '{:library}\extensions\data\{:namespace}\{:class}\{:name}',
- '{:library}\data\{:namespace}\{:class}\adapter\{:name}',
- '{:library}\data\{:namespace}\{:class}\{:name}',
- '{:library}\data\{:class}\adapter\{:name}'
- ],
- 'helper' => [
- '{:library}\extensions\helper\{:name}',
- '{:library}\template\helper\{:name}'
- ],
- 'libraries' => [
- '{:app}/libraries/{:name}',
- '{:root}/{:name}'
- ],
- 'models' => [
- '{:library}\models\{:name}'
- ],
- 'strategy' => [
- '{:library}\extensions\strategy\{:namespace}\{:class}\{:name}',
- '{:library}\extensions\strategy\{:class}\{:name}',
- '{:library}\{:namespace}\{:class}\strategy\{:name}'
- ],
- 'socket' => [
- '{:library}\extensions\net\socket\{:name}',
- '{:library}\extensions\socket\{:name}',
- '{:library}\net\socket\{:name}'
- ],
- 'test' => [
- '{:library}\extensions\test\{:namespace}\{:class}\{:name}',
- '{:library}\test\{:namespace}\{:class}\{:name}'
- ],
- 'tests' => [
- '{:library}\tests\{:namespace}\{:class}\{:name}Test'
- ]
- ];
- /**
- * Stores the name of the default library. When adding a library configuration to the
- * application, if the `'default'` option flag is set to `true`, the name of the library will
- * be assigned. To retrieve the default library's configuration, use `Libraries::get(true)`.
- *
- * @see lithium\core\Libraries::add()
- * @see lithium\core\Libraries::get()
- * @var string
- */
- protected static $_default;
- /**
- * Holds cached class paths generated and used by `lithium\core\Libraries::load()`.
- *
- * @var array
- * @see lithium\core\Libraries::load()
- */
- protected static $_cachedPaths = [];
- /**
- * Holds associations between fully-namespaced class names and file's paths mapped
- * with `lithium\core\Libraries::map()`.
- *
- * @var array
- * @see lithium\core\Libraries::map()
- * @see lithium\core\Libraries::unmap()
- */
- protected static $_map = [];
- /**
- * Accessor method for the class path templates which `Libraries` uses to look up and load
- * classes. Using this method, you can define your own types of classes, or modify the default
- * organization of built-in class types.
- *
- * For example, in a queuing application, you can define a class type called `'job'`:
- * ```
- * Libraries::paths(['job' => '{:library}\extensions\job\{:name}']);
- * ```
- *
- * Then, any classes you add to the `extensions/job` directory in your application will be
- * automatically detected when calling `Libraries::locate('job')`. Additionally, any matching
- * classes in the `extensions/job` directory of any plugin or vendor library you add to your
- * application will also be detected.
- *
- * Supposing you wanted to have the option of further organizing jobs by class type (some jobs
- * are related to updating caches, others to sending notifications, etc.), you can specify
- * multiple paths per class type, with varying levels of specificity:
- * ```
- * Libraries::paths(['job' => [
- * '{:library}\extensions\job\{:class}\{:name}',
- * '{:library}\extensions\job\{:name}'
- * ]]);
- * ```
- *
- * This allows you to, for example, have two different classes called `Cleanup`. One may be
- * located in `app\extensions\job\Cleanup`, while the other is in
- * `app\extensions\job\cache\Cleanup`. Calling: `Libraries::locate('job');` will find
- * both classes, while `Libraries::locate('job.cache');` will only find the second. You can
- * also find individual jobs by name: `Libraries::locate('job', 'Cleanup');`
- *
- * See `Libraries::locate()` for more information on using built-in and user-defined paths to
- * look up classes.
- *
- * In addition to adding custom class types, `paths()` allows you to redefine the naming and
- * organization of existing types. For example, if you wished to reference your model classes
- * as `app\models\PostModel` instead of `app\models\Post`, you can do the following:
- * ```
- * Libraries::paths(['models' => '{:library}\models\{:name}Model']);
- * ```
- *
- * Note, however, that this is a destructive, not an additive operation, and will
- * replace any existing paths defined for that type. If you wish to add a search path
- * for an existing type, you must do the following:
- * ```
- * $existing = Libraries::paths('controllers');
- * Libraries::paths(['controller' => array_merge(
- * ['{:library}\extensions\controllers\{:name}Controller'], (array) $existing
- * )]);
- * ```
- *
- * @see lithium\core\Libraries::locate()
- * @see lithium\core\Libraries::$_paths
- * @param mixed $path If `$path` is a string, returns the path(s) associated with that path
- * type, or `null` if no paths are defined for that type.
- * @return mixed
- */
- public static function paths($path = null) {
- if (empty($path)) {
- return static::$_paths;
- }
- if (is_string($path)) {
- return isset(static::$_paths[$path]) ? static::$_paths[$path] : null;
- }
- static::$_paths = array_filter(array_merge(static::$_paths, (array) $path));
- }
- /**
- * Adds a class library from which files can be loaded.
- *
- * The `add()` method registers a named library configuration to your application, and is used
- * to allow the framework to auto-load classes on an as-needed basis.
- *
- * ### Adding libraries to your application
- *
- * In Lithium, libraries represent the broadest unit of class organization in an application,
- * and _everything_ is a library; this includes your application, and the Lithium framework
- * itself. Libraries can also be other frameworks, like Solar, Zend Framework or PEAR, or
- * Lithium plugins, which are simply libraries that follow the same organizational standards
- * as Lithium applications.
- *
- * By convention, libraries are placed in the `libraries` directory inside your application, or
- * the root `libraries` directory at the top level of the default distribution (i.e. the one
- * that contains the `lithium` directory), however, you can change this on a case-by-case basis
- * using the `'path'` key to specify an absolute path to the library's directory.
- *
- * @param string $name Library name, i.e. `'app'`, `'lithium'`, `'pear'` or `'aura'`.
- * @param array $config Specifies where the library is in the filesystem, and how classes
- * should be loaded from it. Allowed keys are:
- * - `'bootstrap'` _mixed_: A file path (relative to `'path'`) to a bootstrap script that
- * should be run when the library is added, or `true` to use the default bootstrap
- * path, i.e. `config/bootstrap.php`.
- * - `'defer'` _boolean_: If `true`, indicates that, when locating classes, this library
- * should defer to other libraries in order of preference.
- * - `'includePath'` _mixed_: If `true`, appends the absolutely-resolved value of
- * `'path'` to the PHP include path. If a string, the value is appended to PHP's.
- * - `'loader'`: An auto-loader method associated with the library, if any.
- * - `'path'`: The directory containing the library.
- * - `'prefix'` _string_: The class prefix this library uses, i.e. `'lithium\'`,
- * `'Zend_'` or `'Solar_'`. If the library has no global prefix, set to `false`.
- * - `'suffix'` _string_: Gets appended to the end of the file name. For example, most
- * libraries end classes in `'.php'`, but some use `'.class.php'`, or `'.inc.php'`.
- * - `'transform'` _\Closure_: Defines a custom way to transform a class name into its
- * corresponding file path. Accepts either an array of two strings which are
- * interpreted as the pattern and replacement for a regex, or an anonymous function,
- * which receives the class name and library configuration arrays as parameters, and
- * returns the full physical file path as output.
- * - `'resources'` _string_: If this is the default library, this maybe set to the
- * absolute path to the write-enabled application resources directory, which is used
- * for caching, log files, uploads, etc.
- * @return array Returns the resulting set of options created for this library.
- */
- public static function add($name, array $config = []) {
- $defaults = [
- 'name' => $name,
- 'path' => null,
- 'prefix' => $name . "\\",
- 'suffix' => '.php',
- 'loader' => null,
- 'includePath' => false,
- 'transform' => null,
- 'bootstrap' => true,
- 'defer' => false,
- 'default' => false
- ];
- if ($name === 'lithium') {
- $defaults['defer'] = true;
- $defaults['bootstrap'] = false;
- $defaults['path'] = dirname(__DIR__);
- $defaults['loader'] = 'lithium\core\Libraries::load';
- }
- if (isset($config['default']) && $config['default']) {
- static::$_default = $name;
- $defaults['path'] = LITHIUM_APP_PATH;
- $defaults['bootstrap'] = false;
- $defaults['resources'] = LITHIUM_APP_PATH . '/resources';
- }
- $config += $defaults;
- if (!$config['path']) {
- if (!$config['path'] = static::_locatePath('libraries', compact('name'))) {
- throw new ConfigException("Library `{$name}` not found.");
- }
- }
- $config['path'] = str_replace('\\', '/', $config['path']);
- static::_configure(static::$_configurations[$name] = $config);
- return $config;
- }
- /**
- * Configures the application environment based on a library's settings, including appending to
- * the include path, loading a bootstrap file, and registering a loader with SPL's autoloading
- * system.
- *
- * @param array $config The new library's configuration array.
- * @return void
- */
- protected static function _configure($config) {
- if ($config['includePath']) {
- $path = ($config['includePath'] === true) ? $config['path'] : $config['includePath'];
- set_include_path(get_include_path() . PATH_SEPARATOR . $path);
- }
- if ($config['bootstrap'] === true) {
- $path = "{$config['path']}/config/bootstrap.php";
- $config['bootstrap'] = file_exists($path) ? 'config/bootstrap.php' : false;
- }
- if ($config['bootstrap']) {
- require "{$config['path']}/{$config['bootstrap']}";
- }
- if (!empty($config['loader'])) {
- spl_autoload_register($config['loader']);
- }
- }
- /**
- * Allows library information to be retrieved in various ways, including:
- *
- * By name:
- * ``` embed:lithium\tests\cases\core\LibrariesTest::testLibraryConfigAccess(1-1) ```
- *
- * With no parameters, to return all configuration for all libraries:
- * ``` embed:lithium\tests\cases\core\LibrariesTest::testLibraryConfigAccess(22-22) ```
- *
- * By list of names with a key to extract:
- * ``` embed:lithium\tests\cases\core\LibrariesTest::testLibraryConfigAccess(34-34) ```
- *
- * With no name, and a key to extract, to return a key/value array, where the library name is
- * the key, and the `$key` value is the value:
- * ``` embed:lithium\tests\cases\core\LibrariesTest::testLibraryConfigAccess(37-37) ```
- *
- * By containing class name:
- * ``` embed:lithium\tests\cases\core\LibrariesTest::testLibraryConfigAccess(45-45) ```
- *
- * @param mixed $name Either the name of a library added in `Libraries::add()`, an array of
- * library names, or a fully-namespaced class name (see usage examples above).
- * @param string $key Optional key name. If `$name` is set and is the name of a valid library
- * (or an array of valid libraries), returns the given named configuration key,
- * i.e. `'path'`, `'webroot'` or `'resources'`.
- * @return mixed A configuation array for one or more libraries, or a string value if `$key` is
- * specified and `$name` is a string, or a library name (string) if `$name` is a
- * fully-namespaced class name.
- */
- public static function get($name = null, $key = null) {
- $configs = static::$_configurations;
- if (!$name && !$key) {
- return $configs;
- }
- if ($name === true) {
- $name = static::$_default;
- }
- if (is_array($name) || (!$name && $key)) {
- $name = $name ?: array_keys(static::$_configurations);
- $call = [get_called_class(), 'get'];
- return array_combine($name, array_map($call, $name, array_fill(0, count($name), $key)));
- }
- $config = isset($configs[$name]) ? $configs[$name] : null;
- if ($key) {
- return isset($config[$key]) ? $config[$key] : null;
- }
- if (strpos($name, '\\') === false) {
- return $config;
- }
- foreach (static::$_configurations as $library => $config) {
- if ($config['prefix'] && strpos($name, $config['prefix']) === 0) {
- return $library;
- }
- }
- }
- /**
- * Removes a registered library, and unregister's the library's autoloader, if it has one.
- *
- * @param mixed $name A string or array of library names indicating the libraries you wish to
- * remove, i.e. `'app'` or `'lithium'`. This can also be used to unload plugins by name.
- */
- public static function remove($name) {
- foreach ((array) $name as $library) {
- if (isset(static::$_configurations[$library])) {
- if (static::$_configurations[$library]['loader']) {
- spl_autoload_unregister(static::$_configurations[$library]['loader']);
- }
- unset(static::$_configurations[$library]);
- }
- }
- }
- /**
- * Finds the classes or namespaces belonging to a particular library. _Note_: This method
- * assumes loaded class libraries use a consistent class-to-file naming convention.
- *
- * @param mixed $library The name of a library added to the application with `Libraries::add()`,
- * or `true` to search all libraries.
- * @param array $options The options this method accepts:
- * - `'path'` _string_: A physical filesystem path relative to the directory of the
- * library being searched. If provided, only the classes or namespaces within
- * this path will be returned.
- * - `'recursive'` _boolean_: If `true`, recursively searches all directories
- * (namespaces) in the given library. If `false` (the default), only searches the
- * top level of the given path.
- * - `'filter'` _string_: A regular expression applied to a class after it is
- * transformed into a fully-namespaced class name. The default regular expression
- * filters class names based on the
- * [PSR-0](http://groups.google.com/group/php-standards/web/psr-0-final-proposal)
- * PHP 5.3 naming standard.
- * - `'exclude'` _mixed_: Can be either a regular expression of classes/namespaces
- * to exclude, or a PHP callable to be used with `array_filter()`.
- * - `'namespaces'` _boolean_: Indicates whether namespaces should be included in
- * the search results. If `false` (the default), only classes are returned.
- * @return array Returns an array of fully-namespaced class names found in the given library or
- * libraries.
- * @todo Patch this to skip paths belonging to nested libraries in recursive searches.
- */
- public static function find($library, array $options = []) {
- $format = function($file, $config) {
- $trim = [strlen($config['path']) + 1, strlen($config['suffix'])];
- $rTrim = strpos($file, $config['suffix']) !== false ? -$trim[1] : 9999;
- $file = preg_split('/[\/\\\\]/', substr($file, $trim[0], $rTrim));
- return $config['prefix'] . join('\\', $file);
- };
- $defaults = compact('format') + [
- 'path' => '',
- 'recursive' => false,
- 'filter' => '/^(\w+)?(\\\\[a-z0-9_]+)+\\\\[A-Z][a-zA-Z0-9]+$/',
- 'exclude' => '',
- 'namespaces' => false
- ];
- $options += $defaults;
- $libs = [];
- if ($options['namespaces'] && $options['filter'] === $defaults['filter']) {
- $options['format'] = function($class, $config) use ($format, $defaults) {
- if (is_dir($class)) {
- return $format($class, $config);
- }
- if (preg_match($defaults['filter'], $class = $format($class, $config))) {
- return $class;
- }
- };
- $options['filter'] = false;
- }
- if ($library === true) {
- foreach (static::$_configurations as $library => $config) {
- $libs = array_merge($libs, static::find($library, $options));
- }
- return $libs;
- }
- if (!isset(static::$_configurations[$library])) {
- return null;
- }
- $config = static::$_configurations[$library];
- $options['path'] = "{$config['path']}{$options['path']}/*";
- $libs = static::_search($config, $options);
- return array_values(array_filter($libs));
- }
- /**
- * Loads the class definition specified by `$class`. Looks through the list of libraries
- * defined in `$_configurations`, which are added through `lithium\core\Libraries::add()`.
- *
- * @see lithium\core\Libraries::add()
- * @see lithium\core\Libraries::path()
- * @param string $class The fully-namespaced (where applicable) name of the class to load.
- * @param boolean $require Specifies whether the class must be loaded or considered an
- * exception. Defaults to `false`.
- * @return void
- */
- public static function load($class, $require = false) {
- $path = isset(static::$_cachedPaths[$class]) ? static::$_cachedPaths[$class] : null;
- $path = $path ?: static::path($class);
- if ($path && include $path) {
- static::$_cachedPaths[$class] = $path;
- if (method_exists($class, '__init')) {
- $message = "Support for automatic initialization of static classes has been ";
- $message .= "removed. `{$class}::__init()` exists, please remove it to get rid ";
- $message .= "of this message. Static classes must now be initialized manually. ";
- $message .= "i.e. by creating an `init()` method and calling it at the end of ";
- $message .= "the file and outside of the class.";
- throw new RuntimeException($message);
- }
- } elseif ($require) {
- throw new RuntimeException("Failed to load class `{$class}` from path `{$path}`.");
- }
- }
- /**
- * Associtates fully-namespaced class names to their corresponding paths on
- * the file system.
- *
- * Once a class is associtated to a path using `lithium\core\Libraries::map()`
- * the PSR-0 loader or custom class loader setted using the `transform` or `loader`
- * option of `lithium\core\Libraries::add()` are ignored and the associtated path
- * is used instead.
- *
- * @param array $classes An array of fully-namespaced class names (as keys) and
- * their correponding file's paths (as values).
- * @return void
- */
- public static function map(array $classes) {
- foreach ($classes as $key => $value) {
- unset(static::$_cachedPaths[$key]);
- }
- static::$_map = array_merge(static::$_map, $classes);
- }
- /**
- * Unmap fully-namespaced class names mapped using `lithium\core\Libraries::map()`.
- *
- * @see lithium\core\Libraries::map()
- * @param mixed $classes An array of fully-namespaced class names or
- * a string with a fully-namespaced class name.
- */
- public static function unmap($classes) {
- if (!is_array($classes)) {
- $classes = [$classes];
- }
- foreach ($classes as $value) {
- unset(static::$_map[$value]);
- }
- }
- /**
- * Get the corresponding physical file path for a class or namespace name.
- *
- * @param string $class The class name to locate the physical file for. If `$options['dirs']` is
- * set to `true`, `$class` may also be a namespace name, in which case the corresponding
- * directory will be located.
- * @param array $options Options for converting `$class` to a physical path:
- * - `'dirs'`: Defaults to `false`. If `true`, will attempt to case-sensitively look up
- * directories in addition to files (in which case `$class` is assumed to actually be a
- * namespace).
- * @return string Returns the absolute path to the file containing `$class`, or `null` if the
- * file cannot be found.
- */
- public static function path($class, array $options = []) {
- $defaults = ['dirs' => false];
- $options += $defaults;
- $class = ltrim($class, '\\');
- if (isset(static::$_cachedPaths[$class]) && !$options['dirs']) {
- return static::$_cachedPaths[$class];
- }
- if (isset(static::$_map[$class]) && !$options['dirs']) {
- return static::$_map[$class];
- }
- foreach (static::$_configurations as $name => $config) {
- $params = $options + $config;
- $suffix = $params['suffix'];
- if ($params['prefix'] && strpos($class, $params['prefix']) !== 0) {
- continue;
- }
- if ($transform = $params['transform']) {
- if ($file = static::_transformPath($transform, $class, $params)) {
- return $file;
- }
- continue;
- }
- $path = str_replace("\\", '/', substr($class, strlen($params['prefix'])));
- $fullPath = "{$params['path']}/{$path}";
- if (!$options['dirs']) {
- return static::$_cachedPaths[$class] = static::realPath($fullPath . $suffix);
- }
- $list = glob(dirname($fullPath) . '/*');
- $list = array_map(function($i) { return str_replace('\\', '/', $i); }, $list);
- if (in_array($fullPath . $suffix, $list)) {
- return static::$_cachedPaths[$class] = static::realPath($fullPath . $suffix);
- }
- return is_dir($fullPath) ? static::realPath($fullPath) : null;
- }
- }
- /**
- * Wraps the PHP `realpath()` function to add support for finding paths to files inside Phar
- * archives.
- *
- * @param string $path An unresolved path to a file inside a Phar archive which may or may not
- * exist.
- * @return string If `$path` is a valid path to a file inside a Phar archive, returns a string
- * in the format `'phar://<path-to-phar>/<path-to-file>'`. Otherwise returns
- * `null`.
- */
- public static function realPath($path) {
- if (($absolutePath = realpath($path)) !== false) {
- return $absolutePath;
- }
- if (!preg_match('%^phar://([^.]+\.phar(?:\.gz)?)(.+)%', $path, $pathComponents)) {
- return;
- }
- list(, $relativePath, $pharPath) = $pathComponents;
- $pharPath = implode('/', array_reduce(explode('/', $pharPath), function ($parts, $value) {
- if ($value === '..') {
- array_pop($parts);
- } elseif ($value !== '.') {
- $parts[] = $value;
- }
- return $parts;
- }));
- if (($resolvedPath = realpath($relativePath)) !== false) {
- if (file_exists($absolutePath = "phar://{$resolvedPath}{$pharPath}")) {
- return $absolutePath;
- }
- }
- }
- /**
- * Handles the conversion of a class name to a file name using a custom transformation typically
- * defined in the `'transform'` key of a configuration defined through `Libraries::add()`.
- *
- * The transformation can either be a closure which receives two parameters (the class name
- * as a string, and the library configuration as an array), or an array with two values (one
- * being the pattern to match, the other being the replacement).
- *
- * @see lithium\core\Libraries::add()
- * @see lithium\core\Libraries::path()
- * @param mixed $transform Either a closure or an array containing a regular expression match
- * and replacement. If the closure returns an empty value, or the regular
- * expression fails to match, will return `null`.
- * @param string $class The class name which is attempting to be mapped to a file.
- * @param array $options The configuration of the library as passed to `Libraries::add()`, along
- * with any options specified in the call to `Libraries::path()`.
- * @return string Returns transformed path of a class to a file, or `null` if the transformation
- * did not match.
- */
- protected static function _transformPath($transform, $class, array $options = []) {
- if ((is_callable($transform)) && $file = $transform($class, $options)) {
- return $file;
- }
- if (is_array($transform)) {
- list($match, $replace) = $transform;
- return preg_replace($match, $replace, $class) ?: null;
- }
- }
- /**
- * Uses service location (i.e. `Libraries::locate()`) to look up a named class of a particular
- * type, and creates an instance of it, and passes an array of parameters to the constructor.
- *
- * If the given class can't be found, an exception is thrown.
- *
- * @param string $type The type of class as defined by `Libraries::$_paths`.
- * @param string|object $name The un- or fully namespaced name of the class to instantiate or
- * a name in the $classes array. Alternatively an already instantiated object, which will
- * be returned unmodified.
- * @param array $config An array of constructor parameters to pass to the class.
- * @param array $classes Map of short names to fully namespaced classes or instantiated objects,
- * to use for resolving short names.
- * @return object If the class is found, returns an instance of it.
- * @throws lithium\core\ClassNotFoundException Throws an exception if the class can't be found.
- * @filter
- */
- public static function instance($type, $name, array $options = [], array $classes = []) {
- $params = compact('type', 'name', 'options', 'classes');
- return Filters::run(get_called_class(), __FUNCTION__, $params, function($params) {
- $name = $params['name'];
- $type = $params['type'];
- $classes = $params['classes'];
- if (is_string($name) && isset($classes[$name])) {
- $name = $classes[$name];
- }
- if (is_object($name)) {
- return $name;
- }
- if (!$name && !$type) {
- $message = "Invalid class lookup: `\$name` and `\$type` are empty.";
- throw new ClassNotFoundException($message);
- }
- if (!is_string($type) && $type !== null && !isset(static::$_paths[$type])) {
- throw new ClassNotFoundException("Invalid class type `{$type}`.");
- }
- if (!$class = static::locate($type, $name)) {
- throw new ClassNotFoundException("Class `{$name}` of type `{$type}` not found.");
- }
- if (!(is_string($class) && class_exists($class))) {
- throw new ClassNotFoundException("Class `{$name}` of type `{$type}` not defined.");
- }
- return new $class($params['options']);
- });
- }
- /**
- * Performs service location for an object of a specific type. If `$name` is a string, finds the
- * first instance of a class with the given name in any registered library (i.e. apps, plugins
- * or vendor libraries registered via `Libraries::add()`), based on each library's order of
- * precedence. For example, this will find the first model called `File` in any plugin or class
- * library loaded into an application, including the application itself.
- *
- * ```
- * Libraries::locate('models', 'File');
- * ```
- *
- * Order of precedence is usually based on the order in which the library was registered (via
- * `Libraries::add()`), unless the library was registered with the `'defer'` option set to
- * `true`. All libraries with the `'defer'` option set will be searched in
- * registration-order **after** searching all libraries **without** `'defer'` set. This means
- * that in the above example, if an app and a plugin both have a model named `File`, then the
- * model from the app will be returned first, assuming the app was registered first (and
- * assuming the default settings).
- *
- * If `$name` is not specified, `locate()` returns an array with all classes of the specified
- * type which can be found. By default, `locate()` searches all registered libraries.
- *
- * ```
- * Libraries::locate('models');
- * ```
- *
- * For example, the above will return an array of all model classes in all registered plugins
- * and libraries (including the app itself).
- *
- * To learn more about adding and modifying the class paths used with `locate()`, see the
- * documentation for the `paths()` method.
- *
- * @see lithium\core\Libraries::paths()
- * @see lithium\core\Libraries::add()
- * @see lithium\core\Libraries::_locateDeferred()
- * @param string $type The type of class to search for. Typically follows the name of the
- * directory in which the class is stored, i.e. `'models'`, `'controllers'` or
- * `'adapter'`. Some classes types, such as adapters, will require a greater
- * degree of specificity when looking up the desired class. In this case, the dot
- * syntax is used, as in this example when looking up cache adapters:
- * `'adapter.storage.cache'`, or this example, when looking up authentication
- * adapters: `'adapter.security.auth'`.
- * @param string $name The base name (without namespace) of the class you wish to locate. If
- * unspecified, `locate()` will attempt to find all classes of the type specified
- * in `$type`. If you only wish to search for classes within a single plugin or
- * library, you may use the dot syntax to prefix the class name with the library
- * name, i.e. `'app.Post'`, which will only look for a `Post` model within the
- * app itself.
- * @param array $options The options to use when searching and returning class names.
- * - `'type'` _string_: Defaults to `'class'`. If set to `'file'`, returns file
- * names instead of class names.
- * - `'library'` _string_: When specified, only the given library/plugin name will
- * be searched.
- * @return mixed If `$name` is specified, returns the name of the first class found that matches
- * `$name` and `$type`, or returns `null` if no matching classes were found in any
- * registered library. If `$name` is not specified, returns an array of all classes
- * found which match `$type`.
- */
- public static function locate($type, $name = null, array $options = []) {
- if (is_object($name) || strpos($name, '\\') !== false) {
- return $name;
- }
- $ident = $name ? ($type . '.' . $name) : ($type . '.*');
- $ident .= $options ? '.' . md5(serialize($options)) : null;
- if (isset(static::$_cachedPaths[$ident])) {
- return static::$_cachedPaths[$ident];
- }
- $params = static::_params($type, $name);
- $defaults = [
- 'type' => 'class',
- 'library' => $params['library'] !== '*' ? $params['library'] : null
- ];
- $options += $defaults;
- unset($params['library']);
- $paths = static::paths($params['type']);
- if (!isset($paths)) {
- return null;
- }
- if ($params['name'] === '*') {
- $result = static::_locateAll($params, $options);
- return (static::$_cachedPaths[$ident] = $result);
- }
- if ($options['library']) {
- $result = static::_locateDeferred(null, $paths, $params, $options);
- return static::$_cachedPaths[$ident] = $result;
- }
- foreach ([false, true] as $defer) {
- if ($result = static::_locateDeferred($defer, $paths, $params, $options)) {
- return (static::$_cachedPaths[$ident] = $result);
- }
- }
- }
- /**
- * Returns or sets the the class path cache used for mapping class names to file paths, or
- * locating classes using `Libraries::locate()`.
- *
- * @param array $cache An array of keys and values to use when pre-populating the cache. Keys
- * are either class names (which match to file paths as values), or dot-separated
- * lookup paths used by `locate()` (which matches to either a single class or an
- * array of classes). If `false`, the cache is cleared.
- * @return array Returns an array of cached class lookups, formatted per the description for
- * `$cache`.
- */
- public static function cache($cache = null) {
- if ($cache === false) {
- static::$_cachedPaths = [];
- }
- if (is_array($cache)) {
- static::$_cachedPaths += $cache;
- }
- return static::$_cachedPaths;
- }
- /**
- * Performs service location lookups by library, based on the library's `'defer'` flag.
- * Libraries with `'defer'` set to `true` will be searched last when looking up services.
- *
- * @see lithium\core\Libraries::$_paths
- * @see lithium\core\Libraries::locate()
- * @param boolean|null $defer A boolean flag indicating which libraries to search, either
- * the ones with the `'defer'` flag set, or the ones without. Providing `null`
- * will cause the method to ignore the `'defer'` flag set on any library and
- * perform a complete lookup.
- * @param array $paths List of paths to be searched for the given service (class). These are
- * defined in `lithium\core\Libraries::$_paths`, and are organized by class type.
- * @param array $params The list of insert parameters to be injected into each path format
- * string when searching for classes.
- * @param array $options
- * @return string Returns a class path as a string if a given class is found, or null if no
- * class in any path matching any of the parameters is located.
- */
- protected static function _locateDeferred($defer, $paths, $params, array $options = []) {
- $libraries = static::$_configurations;
- if (isset($options['library'])) {
- $libraries = static::get((array) $options['library']);
- }
- foreach ($libraries as $library => $config) {
- if ($config['defer'] !== $defer && $defer !== null) {
- continue;
- }
- foreach (static::_searchPaths($paths, $library) as $tpl) {
- $params['library'] = rtrim($config['prefix'], '\\');
- $class = str_replace('\\*', '', Text::insert($tpl, $params));
- if (file_exists($file = Libraries::path($class, $options))) {
- return ($options['type'] === 'file') ? $file : $class;
- }
- }
- }
- }
- /**
- * Returns the list of valid search path templates for the given service location lookup.
- *
- * @see lithium\core\Libraries::$_paths
- * @see lithium\core\Libraries::_search()
- * @param array $paths The list of all possible path templates from `Libraries::$_paths`.
- * @param string $library The name of the library being searched.
- * @return array Returns an array of valid path template strings.
- */
- protected static function _searchPaths($paths, $library) {
- $result = [];
- foreach ($paths as $tpl => $opts) {
- if (is_int($tpl)) {
- $tpl = $opts;
- $opts = [];
- }
- if (isset($opts['libraries']) && !in_array($library, (array) $opts['libraries'])) {
- continue;
- }
- $result[] = $tpl;
- }
- return $result;
- }
- /**
- * Locates all possible classes for given set of parameters.
- *
- * @param array $params
- * @param array $options
- * @return array
- */
- protected static function _locateAll(array $params, array $options = []) {
- $defaults = ['libraries' => null, 'recursive' => true, 'namespaces' => false];
- $options += $defaults;
- $paths = (array) static::$_paths[$params['type']];
- $libraries = $options['library'] ? $options['library'] : $options['libraries'];
- $libraries = static::get((array) $libraries);
- $flags = ['escape' => '/'];
- $classes = [];
- foreach ($libraries as $library => $config) {
- $params['library'] = $config['path'];
- foreach (static::_searchPaths($paths, $library) as $tpl) {
- $options['path'] = str_replace('\\', '/', Text::insert($tpl, $params, $flags));
- $options['path'] = str_replace('*/', '', $options['path']);
- $classes = array_merge($classes, static::_search($config, $options));
- }
- }
- return array_unique($classes);
- }
- /**
- * Helper function for returning known paths given a certain type.
- *
- * @see lithium\core\Libraries::$_paths
- * @param string $type Path type (specified in `Libraries::$_paths`).
- * @param array $params Path parameters.
- * @return string|null Valid path name or `null` when no of path of given tpe is set.
- */
- protected static function _locatePath($type, $params) {
- if (!isset(static::$_paths[$type])) {
- return null;
- }
- $params += ['app' => LITHIUM_APP_PATH, 'root' => LITHIUM_LIBRARY_PATH];
- foreach (static::$_paths[$type] as $path) {
- if (is_dir($path = str_replace('\\', '/', Text::insert($path, $params)))) {
- return $path;
- }
- }
- }
- /**
- * Search file system.
- *
- * @param string $config
- * @param array $options
- * @param string $name
- * @return array
- */
- protected static function _search($config, $options, $name = null) {
- $defaults = [
- 'path' => null,
- 'suffix' => null,
- 'namespaces' => false,
- 'recursive' => false,
- 'preFilter' => '/[A-Z][A-Za-z0-9]+\./',
- 'filter' => false,
- 'exclude' => false,
- 'format' => function ($file, $config) {
- $trim = [strlen($config['path']) + 1, strlen($config['suffix'])];
- $file = substr($file, $trim[0], -$trim[1]);
- return $config['prefix'] . str_replace('/', '\\', $file);
- }
- ];
- $options += $defaults;
- $path = $options['path'];
- $suffix = $options['namespaces'] ? '' : $config['suffix'];
- $suffix = ($options['suffix'] === null) ? $suffix : $options['suffix'];
- $dFlags = GLOB_ONLYDIR;
- $zFlags = 0;
- if (strpos($path, '{') !== false) {
- $message = "Search path `{$path}` relies on brace globbing. ";
- $message .= 'Support for brace globbing in search paths has been deprecated.';
- trigger_error($message, E_USER_DEPRECATED);
- $dFlags |= GLOB_BRACE;
- $zFlags |= GLOB_BRACE;
- }
- $libs = (array) glob($path . $suffix, $options['namespaces'] ? $dFlags : $zFlags);
- if ($options['recursive']) {
- list($current, $match) = explode('/*', $path, 2);
- $queue = array_diff((array) glob($current . '/*', $dFlags), $libs);
- $match = str_replace('##', '.+', preg_quote(str_replace('*', '##', $match), '/'));
- $match = '/' . $match . preg_quote($suffix, '/') . '$/';
- while ($queue) {
- if (!is_dir($dir = array_pop($queue))) {
- continue;
- }
- $libs = array_merge($libs, (array) glob("{$dir}/*{$suffix}"));
- $queue = array_merge($queue, array_diff((array) glob("{$dir}/*", $dFlags), $libs));
- }
- $libs = preg_grep($match, $libs);
- }
- if ($suffix) {
- $libs = $options['preFilter'] ? preg_grep($options['preFilter'], $libs) : $libs;
- }
- return static::_filter($libs, (array) $config, $options + compact('name'));
- }
- /**
- * Filters a list of library search results by the given set of options.
- *
- * @param array $libs List of found libraries.
- * @param array $config The configuration of the library currently being searched within.
- * @param array $options The options used to filter/format `$libs`.
- * @return array Returns a copy of `$libs`, filtered and transformed based on the configuration
- * provided in `$options`.
- */
- protected static function _filter($libs, array $config, array $options = []) {
- if (is_callable($options['format'])) {
- foreach ($libs as $i => $file) {
- $libs[$i] = $options['format']($file, $config);
- }
- $libs = $options['name'] ? preg_grep("/{$options['name']}$/", $libs) : $libs;
- }
- if ($exclude = $options['exclude']) {
- if (is_string($exclude)) {
- $libs = preg_grep($exclude, $libs, PREG_GREP_INVERT);
- } elseif (is_callable($exclude)) {
- $libs = array_values(array_filter($libs, $exclude));
- }
- }
- if ($filter = $options['filter']) {
- if (is_string($filter)) {
- $libs = preg_grep($filter, $libs) ;
- } elseif (is_callable($filter)) {
- $libs = array_filter(array_map($filter, $libs));
- }
- }
- return $libs;
- }
- /**
- * Get params from type.
- *
- * @param string $type
- * @param string $name default: '*'
- * @return array type, namespace, class, name
- */
- protected static function _params($type, $name = "*") {
- if (!$name) {
- $name = '*';
- }
- $library = $namespace = $class = '*';
- if (strpos($type, '.') !== false) {
- $parts = explode('.', $type);
- $type = array_shift($parts);
- switch (count($parts)) {
- case 1:
- list($class) = $parts;
- break;
- case 2:
- list($namespace, $class) = $parts;
- break;
- default:
- $class = array_pop($parts);
- $namespace = join('\\', $parts);
- break;
- }
- }
- if (strpos($name, '.') !== false) {
- $parts = explode('.', $name);
- $library = array_shift($parts);
- $name = array_pop($parts);
- $namespace = $parts ? join('\\', $parts) : "*";
- }
- return compact('library', 'namespace', 'type', 'class', 'name');
- }
- /* Deprecated / BC */
- /**
- * Stores the closures that represent the method filters. They are indexed by method name.
- *
- * @deprecated Not used anymore.
- * @var array
- */
- protected static $_methodFilters = [];
- /**
- * Apply a closure to a method in `Libraries`.
- *
- * @deprecated Replaced by `\lithium\aop\Filters::apply()` and `::clear()`.
- * @see lithium\util\collection\Filters
- * @param string $method The name of the method to apply the closure to.
- * @param Closure $filter The closure that is used to filter the method.
- * @return void
- */
- public static function applyFilter($method, $filter = null) {
- $message = '`' . __METHOD__ . '()` has been deprecated in favor of ';
- $message .= '`\lithium\aop\Filters::apply()` and `::clear()`.';
- trigger_error($message, E_USER_DEPRECATED);
- $class = get_called_class();
- if ($method === false) {
- Filters::clear($class);
- return;
- }
- foreach ((array) $method as $m) {
- if ($filter === false) {
- Filters::clear($class, $m);
- } else {
- Filters::apply($class, $m, $filter);
- }
- }
- }
- }
- ?>