Psr4ClassLoader::addNamespace() - Code Metrics - Inspection of "Adding Xmf/Asserts" - XOOPS/XoopsCore - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Pull Request — master (#520)

by Richard

created 2017-03-07 04:36 UTC

Psr4ClassLoader::addNamespace() A

↳ Parent: Psr4ClassLoader

Complexity

Conditions	3
Paths	4

Size

Total Lines	21
Code Lines	10

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	0
CRAP Score	12

Importance

Changes

Metric	Value
cc	3
eloc	10
nc	4
nop	3
dl	0
loc	21
rs	9.3142
c	0
b	0
f	0
ccs	0
cts	10
cp	0
crap	12

<?php
/**
 * Copyright (c) 2013 PHP Framework Interop Group
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

namespace Xoops\Core;

/**
 * A Class Loader that implements the technical interoperability
 * standards for PHP 5.3 namespaces and class names set forth in PSR-4.
 * This general-purpose implementation includes the optional functionality
 * of allowing multiple base directories for a single namespace prefix.
 *
 * From the PHP Framework Interop Group
 *
 * Examples
 *
 * 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:
 *
 * @code
 *      <?php
 *      // instantiate the loader
 *      $loader = new \Xoops\Core\Psr4ClassLoader;
 *
 *      // 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');
 * @endcode
 *
 * 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:
 *
 * @code
 *      <?php
 *      new \Foo\Bar\Qux\Quux;
 * @endcode
 *
 * 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:
 *
 * @code
 *      <?php
 *      new \Foo\Bar\Qux\QuuxTest;
 * @endcode
 *
 * @category  Xoops\Core\Psr4ClassLoader
 * @package   Xoops
 * @author    https://github.com/php-fig/fig-standards/
 * @author    Richard Griffith <[email protected]>
 * @copyright 2013 PHP Framework Interop Group
 * @copyright 2013-2014 XOOPS Project (http://xoops.org)
 * @license   MIT (see above)
 * @link      https://github.com/php-fig/fig-standards/wiki/PSR-4-Example-Implementations
 * @see       http://www.php-fig.org/
 */
class Psr4ClassLoader
{
    /**
     * 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();

    /**
     * addLoader sets all basic options and registers the autoloader
     *
     * @param type  $namespace namespace
     * @param mixed $path      path(s) to the namespace's directories
     *                         Can be string - only one directory
     *                         or array of strings - multiple directories
     *
     * @return SplClassLoader
     */
    public static function addLoader($namespace, $path)
    {
        $loaderClass = get_called_class();
        $loader = new $loaderClass($namespace, $path);
        if (is_array($path)) {
            foreach ($path as $pathdir) {
                $loader->addNamespace($namespace, $pathdir);
            }
        } else {
            $loader->addNamespace($namespace, $path);
        }
        $loader->register();
        return $loader;
    }

    /**
     * Register loader with SPL autoloader stack.
     *
     * @return null
     */
    public function register()
    {
        spl_autoload_register(array($this, 'loadClass'));
    }

    /**
     * Adds a base directory for a namespace prefix.
     *
     * @param string $prefix   The namespace prefix.
     * @param string $base_dir Base directory for class files in namespace.
     * @param bool   $prepend  If true, prepend the base directory to the
     *                         stack instead of appending it; this causes
     *                         it to be searched first rather than last.
     *
     * @return null
     */
    public function addNamespace($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;
        $base_dir = rtrim($base_dir, DIRECTORY_SEPARATOR) . '/';

        // initialize the namespace prefix array
        if (isset($this->prefixes[$prefix]) === false) {
            $this->prefixes[$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);
        }
    }

    /**
     * Loads the class file for a given class name.
     *
     * @param string $class The fully-qualified class name.
     *
     * @return string|false  The mapped file name on success, or boolean false on
     * failure.
     */
    public function loadClass($class)
    {
        // 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 = $this->loadMappedFile($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 $relative_class The relative class name.
     *
     * @return false|string  Boolean false if no mapped file can be loaded, or the
     * name of the mapped file that was loaded.
     */
    protected function loadMappedFile($prefix, $relative_class)
    {
        // are there any base directories for this namespace prefix?
        if (isset($this->prefixes[$prefix]) === false) {
            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 ($this->requireFile($file)) {
                // yes, we're done
                return $file;
            }
        }

        // never found it
        return false;
    }

    /**
     * If a file exists, require it from the file system.
     *
     * @param string $file The file to require.
     *
     * @return bool   True if the file exists, false if not.
     */
    protected function requireFile($file)
    {
        if (file_exists($file)) {
            require $file;

            return true;
        }

        return false;
    }
}


1		<?php
2		/**
3		* Copyright (c) 2013 PHP Framework Interop Group
4		*
5		* Permission is hereby granted, free of charge, to any person obtaining a copy
6		* of this software and associated documentation files (the "Software"), to deal
7		* in the Software without restriction, including without limitation the rights
8		* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
9		* copies of the Software, and to permit persons to whom the Software is
10		* furnished to do so, subject to the following conditions:
11		*
12		* The above copyright notice and this permission notice shall be included in
13		* all copies or substantial portions of the Software.
14		*
15		* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16		* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17		* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
18		* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19		* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
20		* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
21		* THE SOFTWARE.
22		*/
23
24		namespace Xoops\Core;
25
26		/**
27		* A Class Loader that implements the technical interoperability
28		* standards for PHP 5.3 namespaces and class names set forth in PSR-4.
29		* This general-purpose implementation includes the optional functionality
30		* of allowing multiple base directories for a single namespace prefix.
31		*
32		* From the PHP Framework Interop Group
33		*
34		* Examples
35		*
36		* Given a foo-bar package of classes in the file system at the following
37		* paths ...
38		*
39		* /path/to/packages/foo-bar/
40		* src/
41		* Baz.php # Foo\Bar\Baz
42		* Qux/
43		* Quux.php # Foo\Bar\Qux\Quux
44		* tests/
45		* BazTest.php # Foo\Bar\BazTest
46		* Qux/
47		* QuuxTest.php # Foo\Bar\Qux\QuuxTest
48		*
49		* ... add the path to the class files for the \Foo\Bar\ namespace prefix
50		* as follows:
51		*
52		* @code
53		* <?php
54		* // instantiate the loader
55		* $loader = new \Xoops\Core\Psr4ClassLoader;
56		*
57		* // register the autoloader
58		* $loader->register();
59		*
60		* // register the base directories for the namespace prefix
61		* $loader->addNamespace('Foo\Bar', '/path/to/packages/foo-bar/src');
62		* $loader->addNamespace('Foo\Bar', '/path/to/packages/foo-bar/tests');
63		* @endcode
64		*
65		* The following line would cause the autoloader to attempt to load the
66		* \Foo\Bar\Qux\Quux class from /path/to/packages/foo-bar/src/Qux/Quux.php:
67		*
68		* @code
69		* <?php
70		* new \Foo\Bar\Qux\Quux;
71		* @endcode
72		*
73		* The following line would cause the autoloader to attempt to load the
74		* \Foo\Bar\Qux\QuuxTest class from /path/to/packages/foo-bar/tests/Qux/QuuxTest.php:
75		*
76		* @code
77		* <?php
78		* new \Foo\Bar\Qux\QuuxTest;
79		* @endcode
80		*
81		* @category Xoops\Core\Psr4ClassLoader
82		* @package Xoops
83		* @author https://github.com/php-fig/fig-standards/
84		* @author Richard Griffith <[email protected]>
85		* @copyright 2013 PHP Framework Interop Group
86		* @copyright 2013-2014 XOOPS Project (http://xoops.org)
87		* @license MIT (see above)
88		* @link https://github.com/php-fig/fig-standards/wiki/PSR-4-Example-Implementations
89		* @see http://www.php-fig.org/
90		*/
91		class Psr4ClassLoader
92		{
93		/**
94		* An associative array where the key is a namespace prefix and the value
95		* is an array of base directories for classes in that namespace.
96		*
97		* @var array
98		*/
99		protected $prefixes = array();
100
101		/**
102		* addLoader sets all basic options and registers the autoloader
103		*
104		* @param type $namespace namespace
105		* @param mixed $path path(s) to the namespace's directories
106		* Can be string - only one directory
107		* or array of strings - multiple directories
108		*
109		* @return SplClassLoader
110		*/
111		public static function addLoader($namespace, $path)
112		{
113		$loaderClass = get_called_class();
114		$loader = new $loaderClass($namespace, $path);
115		if (is_array($path)) {
116		foreach ($path as $pathdir) {
117		$loader->addNamespace($namespace, $pathdir);
118		}
119		} else {
120		$loader->addNamespace($namespace, $path);
121		}
122		$loader->register();
123		return $loader;
124		}
125
126		/**
127		* Register loader with SPL autoloader stack.
128		*
129		* @return null
130		*/
131		public function register()
132		{
133		spl_autoload_register(array($this, 'loadClass'));
134		}
135
136		/**
137		* Adds a base directory for a namespace prefix.
138		*
139		* @param string $prefix The namespace prefix.
140		* @param string $base_dir Base directory for class files in namespace.
141		* @param bool $prepend If true, prepend the base directory to the
142		* stack instead of appending it; this causes
143		* it to be searched first rather than last.
144		*
145		* @return null
146		*/
147		public function addNamespace($prefix, $base_dir, $prepend = false)
148		{
149		// normalize namespace prefix
150		$prefix = trim($prefix, '\\') . '\\';
151
152		// normalize the base directory with a trailing separator
153		$base_dir = rtrim($base_dir, '/') . DIRECTORY_SEPARATOR;
154		$base_dir = rtrim($base_dir, DIRECTORY_SEPARATOR) . '/';
155
156		// initialize the namespace prefix array
157		if (isset($this->prefixes[$prefix]) === false) {
158		$this->prefixes[$prefix] = array();
159		}
160
161		// retain the base directory for the namespace prefix
162		if ($prepend) {
163		array_unshift($this->prefixes[$prefix], $base_dir);
164		} else {
165		array_push($this->prefixes[$prefix], $base_dir);
166		}
167		}
168
169		/**
170		* Loads the class file for a given class name.
171		*
172		* @param string $class The fully-qualified class name.
173		*
174		* @return string\|false The mapped file name on success, or boolean false on
175		* failure.
176		*/
177	8	public function loadClass($class)
178		{
179		// the current namespace prefix
180	8	$prefix = $class;
181
182		// work backwards through the namespace names of the fully-qualified
183		// class name to find a mapped file name
184	8	while (false !== $pos = strrpos($prefix, '\\')) {
185		// retain the trailing namespace separator in the prefix
186	4	$prefix = substr($class, 0, $pos + 1);
187
188		// the rest is the relative class name
189	4	$relative_class = substr($class, $pos + 1);
190
191		// try to load a mapped file for the prefix and relative class
192	4	$mapped_file = $this->loadMappedFile($prefix, $relative_class);
193	4	if ($mapped_file !== false) {
194		return $mapped_file;
195		}
196
197		// remove the trailing namespace separator for the next iteration
198		// of strrpos()
199	4	$prefix = rtrim($prefix, '\\');
200		}
201
202		// never found a mapped file
203	8	return false;
204		}
205
206		/**
207		* Load the mapped file for a namespace prefix and relative class.
208		*
209		* @param string $prefix The namespace prefix.
210		* @param string $relative_class The relative class name.
211		*
212		* @return false\|string Boolean false if no mapped file can be loaded, or the
213		* name of the mapped file that was loaded.
214		*/
215	4	protected function loadMappedFile($prefix, $relative_class)
216		{
217		// are there any base directories for this namespace prefix?
218	4	if (isset($this->prefixes[$prefix]) === false) {
219	4	return false;
220		}
221
222		// look through base directories for this namespace prefix
223		foreach ($this->prefixes[$prefix] as $base_dir) {
224		// replace the namespace prefix with the base directory,
225		// replace namespace separators with directory separators
226		// in the relative class name, append with .php
227		$file = $base_dir
228		. str_replace('\\', '/', $relative_class)
229		. '.php';
230
231		// if the mapped file exists, require it
232		if ($this->requireFile($file)) {
233		// yes, we're done
234		return $file;
235		}
236		}
237
238		// never found it
239		return false;
240		}
241
242		/**
243		* If a file exists, require it from the file system.
244		*
245		* @param string $file The file to require.
246		*
247		* @return bool True if the file exists, false if not.
248		*/
249		protected function requireFile($file)
250		{
251		if (file_exists($file)) {
252		require $file;
253
254		return true;
255		}
256
257		return false;
258		}
259		}
260

XOOPS / XoopsCore

Pull Request — master (#520)

Psr4ClassLoader::addNamespace() A

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