Autoloader::loadClass() - Code Metrics - WPStore/wp-autoloader - Measure and Improve Code Quality continuously with Scrutinizer

Autoloader::loadClass() A
last analyzed 2018-09-12 15:39 UTC

↳ Parent: Autoloader

Complexity

Conditions	3
Paths	3

Size

Total Lines	27
Code Lines	9

Duplication

Lines	0
Ratio	0 %

Importance

Changes

Metric	Value
cc	3
eloc	9
nc	3
nop	1
dl	0
loc	27
rs	9.9666
c	0
b	0
f	0

<?php

/**

 * @author    WPStore.io <[email protected]>
 * @copyright Copyright (c) 2017-2018, WPStore.io
 * @license   https://spdx.org/licenses/MIT.html MIT
 * @package   WPStore\WPUtils\Autoloader
 * @version   1.1.0-dev
 */

/**
 * MIT License
 *
 * Copyright (c) 2017-18 WPStore.io (http://www.wpstore.io)
 *
 * 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 WPUtils;

/**
 * An example of a general-purpose implementation that includes the optional
 * functionality of allowing multiple base directories for a single namespace
 * prefix.
 *
 * 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 \WPUtils\Autoloader;
 *
 *      // 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;
 */

/**
 * Class Autoloader
 *
 * @package WPStoreUtils
 * @See https://github.com/php-fig/fig-standards/blob/master/accepted/PSR-4-autoloader-examples.md
 */
class Autoloader {

	/**
	 * 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();

	/**
	 * Register loader with SPL autoloader stack.
	 *
	 * @throws \Exception

	 */
	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 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 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 ) . '/';

		/** 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 mixed 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 ) {
				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 mixed 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;
	}


} // END class


1			<?php
			0 ignored issues – show introduced 2018-09-12 15:27 UTC by Report Bug Copy Issue Report Class file names should be based on the class name with "class-" prepended. Expected class-autoloader.php, but found wp-autoloader.php. Loading history...
2			/**
			0 ignored issues – show Coding Style introduced 2018-09-12 15:27 UTC by Report Bug Copy Issue Report Missing short description in doc comment Loading history...
3			* @author WPStore.io <[email protected]>
4			* @copyright Copyright (c) 2017-2018, WPStore.io
5			* @license https://spdx.org/licenses/MIT.html MIT
6			* @package WPStore\WPUtils\Autoloader
7			* @version 1.1.0-dev
8			*/
9
10			/**
11			* MIT License
12			*
13			* Copyright (c) 2017-18 WPStore.io (http://www.wpstore.io)
14			*
15			* Permission is hereby granted, free of charge, to any person obtaining a copy
16			* of this software and associated documentation files (the "Software"), to deal
17			* in the Software without restriction, including without limitation the rights
18			* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
19			* copies of the Software, and to permit persons to whom the Software is
20			* furnished to do so, subject to the following conditions:
21			*
22			* The above copyright notice and this permission notice shall be included in all
23			* copies or substantial portions of the Software.
24			*
25			* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
26			* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
27			* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
28			* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
29			* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
30			* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
31			* SOFTWARE.
32			*/
33
34			namespace WPUtils;
35
36			/**
37			* An example of a general-purpose implementation that includes the optional
38			* functionality of allowing multiple base directories for a single namespace
39			* prefix.
40			*
41			* Given a foo-bar package of classes in the file system at the following
42			* paths ...
43			*
44			* /path/to/packages/foo-bar/
45			* src/
46			* Baz.php # Foo\Bar\Baz
47			* Qux/
48			* Quux.php # Foo\Bar\Qux\Quux
49			* tests/
50			* BazTest.php # Foo\Bar\BazTest
51			* Qux/
52			* QuuxTest.php # Foo\Bar\Qux\QuuxTest
53			*
54			* ... add the path to the class files for the \Foo\Bar\ namespace prefix
55			* as follows:
56			*
57			* <?php
58			* // instantiate the loader
59			* $loader = new \WPUtils\Autoloader;
60			*
61			* // register the autoloader
62			* $loader->register();
63			*
64			* // register the base directories for the namespace prefix
65			* $loader->addNamespace('Foo\Bar', '/path/to/packages/foo-bar/src');
66			* $loader->addNamespace('Foo\Bar', '/path/to/packages/foo-bar/tests');
67			*
68			* The following line would cause the autoloader to attempt to load the
69			* \Foo\Bar\Qux\Quux class from /path/to/packages/foo-bar/src/Qux/Quux.php:
70			*
71			* <?php
72			* new \Foo\Bar\Qux\Quux;
73			*
74			* The following line would cause the autoloader to attempt to load the
75			* \Foo\Bar\Qux\QuuxTest class from /path/to/packages/foo-bar/tests/Qux/QuuxTest.php:
76			*
77			* <?php
78			* new \Foo\Bar\Qux\QuuxTest;
79			*/
80
81			/**
82			* Class Autoloader
83			*
84			* @package WPStoreUtils
85			* @See https://github.com/php-fig/fig-standards/blob/master/accepted/PSR-4-autoloader-examples.md
86			*/
87			class Autoloader {
88
89			/**
90			* An associative array where the key is a namespace prefix and the value
91			* is an array of base directories for classes in that namespace.
92			*
93			* @var array
94			*/
95			protected $prefixes = array();
96
97			/**
98			* Register loader with SPL autoloader stack.
99			*
100			* @throws \Exception
			0 ignored issues – show Coding Style introduced 2018-09-12 15:27 UTC by Report Bug Copy Issue Report Comment missing for @throws tag in function comment Loading history...
101			*/
102			public function register() {
103			spl_autoload_register( array( $this, 'loadClass' ) );
104			}
			0 ignored issues – show Coding Style introduced 2018-09-12 15:27 UTC by Report Bug Copy Issue Report Expected 1 blank line before closing function brace; 0 found Loading history...
105
106			/**
107			* Adds a base directory for a namespace prefix.
108			*
109			* @param string $prefix The namespace prefix.
110			* @param string $base_dir A base directory for class files in the
111			* namespace.
112			* @param bool $prepend If true, prepend the base directory to the stack
			0 ignored issues – show Coding Style introduced 2018-09-12 15:27 UTC by Report Bug Copy Issue Report Expected 3 spaces after parameter type; 1 found Loading history...
113			* instead of appending it; this causes it to be searched first rather
114			* than last.
115			*
116			* @return void
117			*/
118			public function addNamespace( $prefix, $base_dir, $prepend = false ) {
			0 ignored issues – show introduced 2018-09-12 15:27 UTC by Report Bug Copy Issue Report Method name "addNamespace" in class Autoloader is not in snake case format, try "add_namespace" Loading history...
119			/** normalize namespace prefix */
			0 ignored issues – show Coding Style introduced 2018-09-12 15:39 UTC by Report Bug Copy Issue Report Doc comment short description must start with a capital letter Loading history...
120			$prefix = trim( $prefix, '\\' ) . '\\';
121
122			/** normalize the base directory with a trailing separator */
			0 ignored issues – show Coding Style introduced 2018-09-12 15:39 UTC by Report Bug Copy Issue Report Doc comment short description must start with a capital letter Loading history...
123			$base_dir = rtrim( $base_dir, DIRECTORY_SEPARATOR ) . '/';
124
125			/** initialize the namespace prefix array */
			0 ignored issues – show Coding Style introduced 2018-09-12 15:39 UTC by Report Bug Copy Issue Report Doc comment short description must start with a capital letter Loading history...
126			if ( isset( $this->prefixes[ $prefix ] ) === false ) {
127			$this->prefixes[ $prefix ] = array();
128			}
129
130			/** retain the base directory for the namespace prefix */
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131			if ( $prepend ) {
132			array_unshift( $this->prefixes[ $prefix ], $base_dir );
133			} else {
134			array_push( $this->prefixes[ $prefix ], $base_dir );
135			}
136			}
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137
138			/**
139			* Loads the class file for a given class name.
140			*
141			* @param string $class The fully-qualified class name.
142			*
143			* @return mixed The mapped file name on success, or boolean false on
144			* failure.
145			*/
146			public function loadClass( $class ) {
			0 ignored issues – show introduced 2018-09-12 15:27 UTC by Report Bug Copy Issue Report Method name "loadClass" in class Autoloader is not in snake case format, try "load_class" Loading history...
147			// the current namespace prefix
			0 ignored issues – show Coding Style introduced 2018-09-12 15:27 UTC by Report Bug Copy Issue Report Inline comments must end in full-stops, exclamation marks, or question marks Loading history...
148			$prefix = $class;
149
150			// work backwards through the namespace names of the fully-qualified
151			// class name to find a mapped file name
			0 ignored issues – show Coding Style introduced 2018-09-12 15:27 UTC by Report Bug Copy Issue Report Inline comments must end in full-stops, exclamation marks, or question marks Loading history...
152			while ( false !== $pos = strrpos( $prefix, '\\' ) ) {
			0 ignored issues – show introduced 2018-09-12 15:27 UTC by Report Bug Copy Issue Report Variable assignment found within a condition. Did you mean to do a comparison? Loading history... Coding Style introduced 2018-09-12 15:27 UTC by Report Bug Copy Issue Report Assignments must be the first block of code on a line Loading history...
153
154			// retain the trailing namespace separator in the prefix
			0 ignored issues – show Coding Style introduced 2018-09-12 15:27 UTC by Report Bug Copy Issue Report Inline comments must end in full-stops, exclamation marks, or question marks Loading history...
155			$prefix = substr( $class, 0, $pos + 1 );
156
157			// the rest is the relative class name
			0 ignored issues – show Coding Style introduced 2018-09-12 15:27 UTC by Report Bug Copy Issue Report Inline comments must end in full-stops, exclamation marks, or question marks Loading history...
158			$relative_class = substr( $class, $pos + 1 );
159
160			// try to load a mapped file for the prefix and relative class
			0 ignored issues – show Coding Style introduced 2018-09-12 15:27 UTC by Report Bug Copy Issue Report Inline comments must end in full-stops, exclamation marks, or question marks Loading history...
161			$mapped_file = $this->loadMappedFile( $prefix, $relative_class );
162			if ( $mapped_file ) {
163			return $mapped_file;
164			}
165
166			// remove the trailing namespace separator for the next iteration
167			// of strrpos()
			0 ignored issues – show Coding Style introduced 2018-09-12 15:27 UTC by Report Bug Copy Issue Report Inline comments must end in full-stops, exclamation marks, or question marks Loading history...
168			$prefix = rtrim( $prefix, '\\' );
169			}
170
171			// never found a mapped file
			0 ignored issues – show Coding Style introduced 2018-09-12 15:27 UTC by Report Bug Copy Issue Report Inline comments must end in full-stops, exclamation marks, or question marks Loading history...
172			return false;
173			}
			0 ignored issues – show Coding Style introduced 2018-09-12 15:27 UTC by Report Bug Copy Issue Report Expected 1 blank line before closing function brace; 0 found Loading history...
174
175			/**
176			* Load the mapped file for a namespace prefix and relative class.
177			*
178			* @param string $prefix The namespace prefix.
179			* @param string $relative_class The relative class name.
180			*
181			* @return mixed Boolean false if no mapped file can be loaded, or the
182			* name of the mapped file that was loaded.
183			*/
184			protected function loadMappedFile( $prefix, $relative_class ) {
			0 ignored issues – show introduced 2018-09-12 15:27 UTC by Report Bug Copy Issue Report Method name "loadMappedFile" in class Autoloader is not in snake case format, try "load_mapped_file" Loading history...
185			// are there any base directories for this namespace prefix?
186			if ( isset( $this->prefixes[ $prefix ] ) === false ) {
187			return false;
188			}
189
190			// look through base directories for this namespace prefix
			0 ignored issues – show Coding Style introduced 2018-09-12 15:27 UTC by Report Bug Copy Issue Report Inline comments must end in full-stops, exclamation marks, or question marks Loading history...
191			foreach ( $this->prefixes[ $prefix ] as $base_dir ) {
192
193			/**
194			* replace the namespace prefix with the base directory,
			0 ignored issues – show Coding Style introduced 2018-09-12 15:39 UTC by Report Bug Copy Issue Report Doc comment short description must start with a capital letter Loading history...
195			* replace namespace separators with directory separators
196			* in the relative class name, append with .php
197			*/
198			$file = $base_dir . str_replace( '\\', '/', $relative_class ) . '.php';
199
200			// if the mapped file exists, require it
			0 ignored issues – show Coding Style introduced 2018-09-12 15:27 UTC by Report Bug Copy Issue Report Inline comments must end in full-stops, exclamation marks, or question marks Loading history...
201			if ( $this->requireFile( $file ) ) {
202			// yes, we're done
			0 ignored issues – show Coding Style introduced 2018-09-12 15:27 UTC by Report Bug Copy Issue Report Inline comments must end in full-stops, exclamation marks, or question marks Loading history...
203			return $file;
204			}
205			}
206
207			// never found it
			0 ignored issues – show Coding Style introduced 2018-09-12 15:27 UTC by Report Bug Copy Issue Report Inline comments must end in full-stops, exclamation marks, or question marks Loading history...
208			return false;
209			}
			0 ignored issues – show Coding Style introduced 2018-09-12 15:27 UTC by Report Bug Copy Issue Report Expected 1 blank line before closing function brace; 0 found Loading history...
210
211			/**
212			* If a file exists, require it from the file system.
213			*
214			* @param string $file The file to require.
215			*
216			* @return bool True if the file exists, false if not.
217			*/
218			protected function requireFile( $file ) {
			0 ignored issues – show introduced 2018-09-12 15:27 UTC by Report Bug Copy Issue Report Method name "requireFile" in class Autoloader is not in snake case format, try "require_file" Loading history...
219			if ( file_exists( $file ) ) {
220			require $file;
221
222			return true;
223			}
224
225			return false;
226			}
			0 ignored issues – show Coding Style introduced 2018-09-12 15:39 UTC by Report Bug Copy Issue Report Expected 1 blank line before closing function brace; 0 found Loading history...
227
228			} // END class
229

WPStore / wp-autoloader

Autoloader::loadClass() A last analyzed 2018-09-12 15:39 UTC

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Autoloader::loadClass() A
last analyzed 2018-09-12 15:39 UTC