EmailLogAutoloader::require_file() - Code Metrics - Inspection of "Combine search and filter forms into a single one" - sudar/email-log - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Push — 215-feature/change-log-row-col... ( d38ad4 )

by Maria Daniel Deepak

created 2019-04-25 00:46 UTC

EmailLogAutoloader::require_file() A

↳ Parent: EmailLogAutoloader

Complexity

Conditions	2
Paths	2

Size

Total Lines	8
Code Lines	4

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	4
CRAP Score	2.032

Importance

Changes

Metric	Value
cc	2
eloc	4
nc	2
nop	1
dl	0
loc	8
ccs	4
cts	5
cp	0.8
crap	2.032
rs	10
c	0
b	0
f	0

<?php namespace EmailLog;

/**
 * Autoloader for EmailLog, based on the PSR-4 general purpose implemetation.
 *
 * @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 \EmailLog\EmailLogAutoloader;
 *
 *      // 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 2.0
 */
class EmailLogAutoloader {
	/**
	 * 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();

	/**
	 * 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 ) {
		// 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;
	}
}


1		<?php namespace EmailLog;
2
3		/**
4		* Autoloader for EmailLog, based on the PSR-4 general purpose implemetation.
5		*
6		* @see http://www.php-fig.org/psr/psr-4/
7		*
8		* This differs from WordPress coding standard in the following ways.
9		*
10		* - Class name and directory names use Snake case.
11		* - Use of namespaces.
12		*
13		* Given a foo-bar package of classes in the file system at the following
14		* paths ...
15		*
16		* /path/to/packages/foo-bar/
17		* src/
18		* Baz.php # Foo\Bar\Baz
19		* Qux/
20		* Quux.php # Foo\Bar\Qux\Quux
21		* tests/
22		* BazTest.php # Foo\Bar\BazTest
23		* Qux/
24		* QuuxTest.php # Foo\Bar\Qux\QuuxTest
25		*
26		* ... add the path to the class files for the \Foo\Bar\ namespace prefix
27		* as follows:
28		*
29		* <?php
30		* // instantiate the loader
31		* $loader = new \EmailLog\EmailLogAutoloader;
32		*
33		* // register the autoloader
34		* $loader->register();
35		*
36		* // register the base directories for the namespace prefix
37		* $loader->addNamespace('Foo\Bar', '/path/to/packages/foo-bar/src');
38		* $loader->addNamespace('Foo\Bar', '/path/to/packages/foo-bar/tests');
39		*
40		* The following line would cause the autoloader to attempt to load the
41		* \Foo\Bar\Qux\Quux class from /path/to/packages/foo-bar/src/Qux/Quux.php:
42		*
43		* <?php
44		* new \Foo\Bar\Qux\Quux;
45		*
46		* The following line would cause the autoloader to attempt to load the
47		* \Foo\Bar\Qux\QuuxTest class from /path/to/packages/foo-bar/tests/Qux/QuuxTest.php:
48		*
49		* <?php
50		* new \Foo\Bar\Qux\QuuxTest;
51		* @since 2.0
52		*/
53		class EmailLogAutoloader {
54		/**
55		* An associative array where the key is a namespace prefix and the value
56		* is an array of base directories for classes in that namespace.
57		*
58		* @var array
59		*/
60		protected $prefixes = array();
61
62		/**
63		* An associative array containing the list files that needs to be autoloaded.
64		*
65		* @var array
66		*/
67		protected $files = array();
68
69		/**
70		* Register loader with SPL autoloader stack.
71		*
72		* @return void
73		*/
74		public function register() {
75		spl_autoload_register( array( $this, 'load_class' ) );
76
77		// file exists check is already done in `add_file`.
78		foreach ( $this->files as $file ) {
79		$this->require_file( $file );
80		}
81		}
82
83		/**
84		* Adds a base directory for a namespace prefix.
85		*
86		* @param string $prefix The namespace prefix.
87		* @param string $base_dir A base directory for class files in the
88		* namespace.
89		* @param bool $prepend If true, prepend the base directory to the stack
90		* instead of appending it; this causes it to be searched first rather
91		* than last.
92		*
93		* @return void
94		*/
95	5	public function add_namespace( $prefix, $base_dir, $prepend = false ) {
96		// normalize namespace prefix
97	5	$prefix = trim( $prefix, '\\' ) . '\\';
98
99		// normalize the base directory with a trailing separator
100	5	$base_dir = rtrim( $base_dir, DIRECTORY_SEPARATOR ) . '/';
101
102		// initialize the namespace prefix array
103	5	if ( false === isset( $this->prefixes[ $prefix ] ) ) {
104	5	$this->prefixes[ $prefix ] = array();
105	5	}
106
107		// retain the base directory for the namespace prefix
108	5	if ( $prepend ) {
109		array_unshift( $this->prefixes[ $prefix ], $base_dir );
110		} else {
111	5	array_push( $this->prefixes[ $prefix ], $base_dir );
112		}
113	5	}
114
115		/**
116		* Add a file to be autoloaded.
117		*
118		* @param string $filename File to be autoloaded.
119		*/
120	1	public function add_file( $filename ) {
121	1	if ( ! in_array( $filename, $this->files, true ) ) {
122	1	$this->files[] = $filename;
123	1	}
124	1	}
125
126		/**
127		* Loads the class file for a given class name.
128		*
129		* @param string $class The fully-qualified class name.
130		*
131		* @return false\|string The mapped file name on success, or boolean false on
132		* failure.
133		*/
134	6	public function load_class( $class ) {
135		// the current namespace prefix
136	6	$prefix = $class;
137
138		// work backwards through the namespace names of the fully-qualified
139		// class name to find a mapped file name
140	6	while ( false !== $pos = strrpos( $prefix, '\\' ) ) {
141
142		// retain the trailing namespace separator in the prefix
143	6	$prefix = substr( $class, 0, $pos + 1 );
144
145		// the rest is the relative class name
146	6	$relative_class = substr( $class, $pos + 1 );
147
148		// try to load a mapped file for the prefix and relative class
149	6	$mapped_file = $this->load_mapped_file( $prefix, $relative_class );
150	6	if ( $mapped_file !== false ) {
151	5	return $mapped_file;
152		}
153
154		// remove the trailing namespace separator for the next iteration
155		// of strrpos()
156	3	$prefix = rtrim( $prefix, '\\' );
157	3	}
158
159		// never found a mapped file
160	1	return false;
161		}
162
163		/**
164		* Load the mapped file for a namespace prefix and relative class.
165		*
166		* @param string $prefix The namespace prefix.
167		* @param string $relative_class The relative class name.
168		*
169		* @return false\|string Boolean false if no mapped file can be loaded, or the
170		* name of the mapped file that was loaded.
171		*/
172	6	protected function load_mapped_file( $prefix, $relative_class ) {
173		// are there any base directories for this namespace prefix?
174	6	if ( false === isset( $this->prefixes[ $prefix ] ) ) {
175	3	return false;
176		}
177
178		// look through base directories for this namespace prefix
179	5	foreach ( $this->prefixes[ $prefix ] as $base_dir ) {
180
181		// replace the namespace prefix with the base directory,
182		// replace namespace separators with directory separators
183		// in the relative class name, append with .php
184		$file = $base_dir
185	5	. str_replace( '\\', '/', $relative_class )
186	5	. '.php';
187
188		// if the mapped file exists, require it
189	5	if ( $this->require_file( $file ) ) {
190		// yes, we're done
191	5	return $file;
192		}
193	1	}
194
195		// never found it
196		return false;
197		}
198
199		/**
200		* If a file exists, require it from the file system.
201		*
202		* @param string $file The file to require.
203		*
204		* @return bool True if the file exists, false if not.
205		*/
206	2	protected function require_file( $file ) {
207	2	if ( file_exists( $file ) ) {
208	2	require_once $file;
209
210	2	return true;
211		}
212
213		return false;
214		}
215		}
216

sudar / email-log

Push — 215-feature/change-log-row-col... ( d38ad4 )

EmailLogAutoloader::require_file() A

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Duplication

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