mp.php ➔ getValueByRef() - Code Metrics - Inspection of "Fix travis.CI badge to display status of master br..." - Nayjest/manipulator - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Push — master ( d3f7b6...bab90a )

by Vitaliy

created 2016-07-22 15:37 UTC

mp.php ➔ getValueByRef() C

↳ Parent: Project

Complexity

Conditions	10
Paths	8

Size

Total Lines	48
Code Lines	30

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	27
CRAP Score	10.0328

Importance

Changes	3
Bugs	1	Features	0

Metric	Value
cc	10
eloc	30
c	3
b	1
f	0
nc	8
nop	4
dl	0
loc	48
ccs	27
cts	29
cp	0.931
crap	10.0328
rs	5.3454

How to fix Complexity

<?php

namespace mp;

use Nayjest\StrCaseConverter\Str;
use ReflectionClass;

define('MP_USE_SETTERS', 1);
define('MP_CREATE_PROPERTIES', 2);

/**
 * Creates class instance using specified constructor arguments.
 *
 * @param string $class
 * @param array $arguments
 * @return object
 */
function instantiate($class, array $arguments = [])
{
    switch (count($arguments)) {
        case 0:
            return new $class();
        case 1:
            return new $class(array_shift($arguments));
        case 2:
            return new $class(
                array_shift($arguments),
                array_shift($arguments)
            );
        case 3:
            return new $class(
                array_shift($arguments),
                array_shift($arguments),
                array_shift($arguments)
            );
    }
    $reflection = new ReflectionClass($class);
    return $reflection->newInstanceArgs($arguments);
}

/**
 * Assigns values from array to existing public properties of target object.
 *
 * By default this function ignores fields having no corresponding properties in target object,
 * but this behavior can be changed if TRUE will be passed to third argument.
 *
 * @param object $targetObject target object
 * @param array $fields fields to assign, keys must be same as target object property names
 * @param bool $createProperties (optional, default value: false)
 *                               allows to create new properties in target object if value is true
 * @return string[] names of successfully assigned properties
 */
function setPublicProperties($targetObject, array $fields, $createProperties = false)
{
    if ($createProperties) {
        $overwrite = $fields;
    } else {
        $existing = get_object_vars($targetObject);
        $overwrite = array_intersect_key($fields, $existing);
    }
    foreach ($overwrite as $key => $value) {
        $targetObject->{$key} = $value;
    }
    return array_keys($overwrite);
}

/**
 * Assigns values from array to corresponding properties of target object using setters.
 *
 * This function works similar to mp\setPublicProperties(), but uses setter methods instead of public properties.
 *
 * Field names may be in snake or camel case,
 * it will be converted to camel case and prefixed by 'set'
 * to check availability of corresponding setter in target object.
 *
 * Fields having no corresponding setters in target object will be ignored.
 *
 * This function does not work with magic setters created using __set() php method.
 *
 * @param object $targetObject target object
 * @param array $fields fields to assign, keys are used to check availability of corresponding setters in target object
 * @return string[] names of successfully assigned properties
 */
function setValuesUsingSetters($targetObject, array $fields)
{
    $assignedProperties = [];
    foreach ($fields as $key => $value) {
        $methodName = 'set' . Str::toCamelCase($key);
        if (method_exists($targetObject, $methodName)) {
            $targetObject->$methodName($value);
            $assignedProperties[] = $key;
        }
    }
    return $assignedProperties;
}

/**
 * Assigns values from $fields array to $target. Target may be object or array.
 *
 * By default `mp\setValues` ignores fields having no corresponding properties or setters in target object
 * but this behavior can be changed if MP_CREATE_PROPERTIES option is used.
 *
 * Assigning values using setters can be disabled by removing MP_USE_SETTERS option (it's enabled by default).
 *
 * When target is an array, `mp\setValues` will call array_merge PHP function.
 *
 * @param object|array $target target object or array
 * @param array $fields fields to assign
 * @pram int $options (optional, default value: MP_USE_SETTERS) supported options: MP_USE_SETTERS, MP_CREATE_PROPERTIES
 * @return string[] names of successfully assigned properties
 */
function setValues(&$target, array $fields, $options = MP_USE_SETTERS)
{
    if (is_array($target)) {
        $target = array_merge($target, $fields);
        return array_keys($fields);
    }
    if ($options & MP_USE_SETTERS) {
        $assignedBySetters = setValuesUsingSetters(
            $target,
            $fields
        );
    } else {
        $assignedBySetters = [];
    }
    $assignedProperties = setPublicProperties(
        $target,
        array_diff_key($fields, array_flip($assignedBySetters)),
        $options & MP_CREATE_PROPERTIES
    );

    return array_merge($assignedProperties, $assignedBySetters);
}

/**
 * Returns names of writable properties for objects and classes or existing keys for arrays.
 *
 * Only public object properties and properties having setters considered writable.
 *
 * For setters, this function will return property names based on setter names
 * (setter names are converted to snake case, 'set' prefixes are removed).
 *
 * Detecting properties by setters can be disabled by specifying second argument as FALSE.
 *
 * @param object|string|array $target object or class name or array
 * @param bool $useSetters (optional, default value: true) if true, properties having setters will be added to results
 * @return string[] names of writable properties
 */
function getWritable($target, $useSetters = true)
{
    static $writable = [];

    if (is_array($target)) {
        return array_keys($target);
    }
    $class = is_object($target) ? get_class($target) : $target;
    $cacheKey = $class . ($useSetters ? '+s' : '');
    if (!array_key_exists($cacheKey, $writable)) {
        $writable[$cacheKey] = array_keys(get_class_vars($class));
        if ($useSetters) {
            $setters = getSetters($class);
            foreach ($setters as $setter) {
                $writable[$cacheKey][] = Str::toSnakeCase(substr($setter, 3));
            }
        }
    }
    return $writable[$cacheKey];
}

/**
 * Returns method names from target object/class that starts from specified keyword
 * and followed by uppercase character.
 *
 * Examples:
 *     - mp\getMethodsPrefixedBy('get', $obj)
 *       will return methods that looks like getters.
 *
 * @param string $keyword method name prefix
 * @param object|string $target object or class name
 * @return array|string[] method names
 */
function getMethodsPrefixedBy($keyword, $target)
{
    $res = [];
    $methods = get_class_methods($target);
    $keyLength = strlen($keyword);
    foreach ($methods as $method) {
        if (
            strpos($method, $keyword) === 0
            && strlen($method) > $keyLength
            && ctype_upper($method[$keyLength])
        ) {
            $res[] = $method;
        }
    }
    return $res;
}

/**
 * Returns method names from target object/class that looks like setters.
 *
 * @param object|string $target object or class name
 * @return string[] method names
 */
function getSetters($target)
{
    return getMethodsPrefixedBy('set', $target);
}

/**
 * Returns method names from target object/class that looks like getters.
 *
 * @param object|string $target object or class name
 * @return array|string[] method names
 */
function getGetters($target)
{
    return getMethodsPrefixedBy('get', $target);
}

/**
 * Returns values of properties specified in $propertyNames argument.
 *
 * This function supports getters, i. e.
 * value returned by getSomeValue() method of target object can be requested as 'some_value' property.
 *
 * @experimental
 *
 * @param object|array $src
 * @param string[] $propertyNames
 * @return array
 */
function getValues($src, array $propertyNames)
{

    if (is_array($src)) {
        return array_intersect_key($src, array_flip($propertyNames));
    }
    $values = array_intersect_key(get_object_vars($src), array_flip($propertyNames));
    foreach ($propertyNames as $key) {
        if (array_key_exists($key, $values)) continue;
        $getter = 'get' . Str::toCamelCase($key);
        if (method_exists($src, $getter)) {
            $values[$key] = $src->{$getter}();
        }
    }
    return $values;
}

/**
 * Extracts value specified by property / field name from object or array.
 *
 * This function supports property paths (prop1.prop2.prop3) and getters.
 *
 * If $propertyName = 'prop_name', this method will try to extract data in following order from:
 * - $src['prop_name']
 * - $src->prop_name
 * - $src->getPropName()
 * - $src->prop_name()
 * - $src->isPropName()
 *
 * @experimental
 * @param array|object $src
 * @param string $propertyName
 * @param mixed $default default value
 * @param string|null $delimiter (optional, default value: '.') used to specify property paths
 * @return mixed
 */
function getValue($src, $propertyName, $default = null, $delimiter = '.')
{
    return getValueByRef($src, $propertyName, $default, $delimiter);
}

/**
 * Extracts value specified by property / field / method name from object or array by reference if possible.
 *
 * This function acts like `mp\getValue` with only difference that value will be returned by reference if possible.
 *
 * @experimental
 * @param array|object $src
 * @param string $propertyName
 * @param mixed $default
 * @param string|null $delimiter
 * @return mixed|null
 */
function &getValueByRef(&$src, $propertyName, $default = null, $delimiter = '.')
{
    if ($delimiter && $pos = strpos($propertyName, $delimiter)) {
''   == false // true
''   == null  // true
'ab' == false // false
'ab' == null  // false

// It is often better to use strict comparison
'' === false // false
'' === null  // false
        // head(a.b.c) = a
        // tail(a.b.c) = b.c
        $head = substr($propertyName, 0, $pos);
        $tail = substr($propertyName, $pos + 1);
        return getValueByRef(
            getValueByRef($src, $head, $default, null),
            $tail,
            $default,
            $delimiter
        );
    }

    if (is_array($src)) {
        if (array_key_exists($propertyName, $src)) {
            return $src[$propertyName];
        }
    } elseif (is_object($src)) {
        if (isset($src->{$propertyName})) {
            // if it's not magic method, return reference
            if (property_exists($src, $propertyName)) {
                return $src->{$propertyName};
                // otherwise (it's __get()) calling $src->{$propertyName} will generate PHP notice:
                // indirect modification of overloaded property has no effect.
                // Therefore we return link to temp variable instead of link to variable itself.
            } else {
                $tmp = $src->{$propertyName};
                return $tmp;
            }
        }
        $camelPropName = Str::toCamelCase($propertyName);
        $methods = [
            'get' . $camelPropName,
            $propertyName,
            $camelPropName,
            'is' . $camelPropName
        ];
        foreach ($methods as $method) {
            if (method_exists($src, $method)) {
                $result = call_user_func([$src, $method]);
                return $result;
            }
        }
    }
    return $default;
}

/**
 * Assigns value, supports property paths (prop1.prop2.prop3).
 *
 * @experimental
 * @param array|object $target
 * @param string $propertyName
 * @param mixed $value
 * @param string|null $delimiter
 * @return bool returns TRUE if value was successfully assigned, FALSE otherwise
 */
function setValue(&$target, $propertyName, $value, $delimiter = '.')
{
    if ($delimiter && $pos = strrpos($propertyName, $delimiter)) {
''   == false // true
''   == null  // true
'ab' == false // false
'ab' == null  // false

// It is often better to use strict comparison
'' === false // false
'' === null  // false
        // head(a.b.c) = a.b
        // tail(a.b.c) = c
        $head = substr($propertyName, 0, $pos);
        $tail = substr($propertyName, $pos + 1);
        $container = &getValueByRef($target, $head, null, $delimiter);
        if (!$container) {
            return false;
        }
        $res = setValues($container, [$tail => $value]);
        return count($res) === 1;
    }
    $res = setValues($target, [$propertyName => $value]);
    return count($res) === 1;
}


1		<?php
2
3		namespace mp;
4
5		use Nayjest\StrCaseConverter\Str;
6		use ReflectionClass;
7
8		define('MP_USE_SETTERS', 1);
9		define('MP_CREATE_PROPERTIES', 2);
10
11		/**
12		* Creates class instance using specified constructor arguments.
13		*
14		* @param string $class
15		* @param array $arguments
16		* @return object
17		*/
18		function instantiate($class, array $arguments = [])
19		{
20	2	switch (count($arguments)) {
21	2	case 0:
22	1	return new $class();
23	1	case 1:
24	1	return new $class(array_shift($arguments));
25	1	case 2:
26	1	return new $class(
27	1	array_shift($arguments),
28	1	array_shift($arguments)
29	1	);
30	1	case 3:
31	1	return new $class(
32	1	array_shift($arguments),
33	1	array_shift($arguments),
34	1	array_shift($arguments)
35	1	);
36	1	}
37	1	$reflection = new ReflectionClass($class);
38	1	return $reflection->newInstanceArgs($arguments);
39		}
40
41		/**
42		* Assigns values from array to existing public properties of target object.
43		*
44		* By default this function ignores fields having no corresponding properties in target object,
45		* but this behavior can be changed if TRUE will be passed to third argument.
46		*
47		* @param object $targetObject target object
48		* @param array $fields fields to assign, keys must be same as target object property names
49		* @param bool $createProperties (optional, default value: false)
50		* allows to create new properties in target object if value is true
51		* @return string[] names of successfully assigned properties
52		*/
53		function setPublicProperties($targetObject, array $fields, $createProperties = false)
54		{
55	4	if ($createProperties) {
56	1	$overwrite = $fields;
57	1	} else {
58	3	$existing = get_object_vars($targetObject);
59	3	$overwrite = array_intersect_key($fields, $existing);
60		}
61	4	foreach ($overwrite as $key => $value) {
62	3	$targetObject->{$key} = $value;
63	4	}
64	4	return array_keys($overwrite);
65		}
66
67		/**
68		* Assigns values from array to corresponding properties of target object using setters.
69		*
70		* This function works similar to mp\setPublicProperties(), but uses setter methods instead of public properties.
71		*
72		* Field names may be in snake or camel case,
73		* it will be converted to camel case and prefixed by 'set'
74		* to check availability of corresponding setter in target object.
75		*
76		* Fields having no corresponding setters in target object will be ignored.
77		*
78		* This function does not work with magic setters created using __set() php method.
79		*
80		* @param object $targetObject target object
81		* @param array $fields fields to assign, keys are used to check availability of corresponding setters in target object
82		* @return string[] names of successfully assigned properties
83		*/
84		function setValuesUsingSetters($targetObject, array $fields)
85		{
86	2	$assignedProperties = [];
87	2	foreach ($fields as $key => $value) {
88	2	$methodName = 'set' . Str::toCamelCase($key);
89	2	if (method_exists($targetObject, $methodName)) {
90	2	$targetObject->$methodName($value);
91	2	$assignedProperties[] = $key;
92	2	}
93	2	}
94	2	return $assignedProperties;
95		}
96
97		/**
98		* Assigns values from $fields array to $target. Target may be object or array.
99		*
100		* By default `mp\setValues` ignores fields having no corresponding properties or setters in target object
101		* but this behavior can be changed if MP_CREATE_PROPERTIES option is used.
102		*
103		* Assigning values using setters can be disabled by removing MP_USE_SETTERS option (it's enabled by default).
104		*
105		* When target is an array, `mp\setValues` will call array_merge PHP function.
106		*
107		* @param object\|array $target target object or array
108		* @param array $fields fields to assign
109		* @pram int $options (optional, default value: MP_USE_SETTERS) supported options: MP_USE_SETTERS, MP_CREATE_PROPERTIES
110		* @return string[] names of successfully assigned properties
111		*/
112		function setValues(&$target, array $fields, $options = MP_USE_SETTERS)
113		{
114	3	if (is_array($target)) {
115	2	$target = array_merge($target, $fields);
116	2	return array_keys($fields);
117		}
118	1	if ($options & MP_USE_SETTERS) {
119	1	$assignedBySetters = setValuesUsingSetters(
120	1	$target,
121		$fields
122	1	);
123	1	} else {
124		$assignedBySetters = [];
125		}
126	1	$assignedProperties = setPublicProperties(
127	1	$target,
128	1	array_diff_key($fields, array_flip($assignedBySetters)),
129		$options & MP_CREATE_PROPERTIES
130	1	);
131
132	1	return array_merge($assignedProperties, $assignedBySetters);
133		}
134
135		/**
136		* Returns names of writable properties for objects and classes or existing keys for arrays.
137		*
138		* Only public object properties and properties having setters considered writable.
139		*
140		* For setters, this function will return property names based on setter names
141		* (setter names are converted to snake case, 'set' prefixes are removed).
142		*
143		* Detecting properties by setters can be disabled by specifying second argument as FALSE.
144		*
145		* @param object\|string\|array $target object or class name or array
146		* @param bool $useSetters (optional, default value: true) if true, properties having setters will be added to results
147		* @return string[] names of writable properties
148		*/
149		function getWritable($target, $useSetters = true)
150		{
151	1	static $writable = [];
152
153	1	if (is_array($target)) {
154	1	return array_keys($target);
155		}
156	1	$class = is_object($target) ? get_class($target) : $target;
157	1	$cacheKey = $class . ($useSetters ? '+s' : '');
158	1	if (!array_key_exists($cacheKey, $writable)) {
159	1	$writable[$cacheKey] = array_keys(get_class_vars($class));
160	1	if ($useSetters) {
161	1	$setters = getSetters($class);
162	1	foreach ($setters as $setter) {
163	1	$writable[$cacheKey][] = Str::toSnakeCase(substr($setter, 3));
164	1	}
165	1	}
166	1	}
167	1	return $writable[$cacheKey];
168		}
169
170		/**
171		* Returns method names from target object/class that starts from specified keyword
172		* and followed by uppercase character.
173		*
174		* Examples:
175		* - mp\getMethodsPrefixedBy('get', $obj)
176		* will return methods that looks like getters.
177		*
178		* @param string $keyword method name prefix
179		* @param object\|string $target object or class name
180		* @return array\|string[] method names
181		*/
182		function getMethodsPrefixedBy($keyword, $target)
183		{
184	3	$res = [];
185	3	$methods = get_class_methods($target);
186	3	$keyLength = strlen($keyword);
187	3	foreach ($methods as $method) {
188		if (
189	3	strpos($method, $keyword) === 0
190	3	&& strlen($method) > $keyLength
191	3	&& ctype_upper($method[$keyLength])
192	3	) {
193	3	$res[] = $method;
194	3	}
195	3	}
196	3	return $res;
197		}
198
199		/**
200		* Returns method names from target object/class that looks like setters.
201		*
202		* @param object\|string $target object or class name
203		* @return string[] method names
204		*/
205		function getSetters($target)
206		{
207	2	return getMethodsPrefixedBy('set', $target);
208		}
209
210		/**
211		* Returns method names from target object/class that looks like getters.
212		*
213		* @param object\|string $target object or class name
214		* @return array\|string[] method names
215		*/
216		function getGetters($target)
217		{
218	1	return getMethodsPrefixedBy('get', $target);
219		}
220
221		/**
222		* Returns values of properties specified in $propertyNames argument.
223		*
224		* This function supports getters, i. e.
225		* value returned by getSomeValue() method of target object can be requested as 'some_value' property.
226		*
227		* @experimental
228		*
229		* @param object\|array $src
230		* @param string[] $propertyNames
231		* @return array
232		*/
233		function getValues($src, array $propertyNames)
234		{
235
236	1	if (is_array($src)) {
237	1	return array_intersect_key($src, array_flip($propertyNames));
238		}
239	1	$values = array_intersect_key(get_object_vars($src), array_flip($propertyNames));
240	1	foreach ($propertyNames as $key) {
241	1	if (array_key_exists($key, $values)) continue;
242	1	$getter = 'get' . Str::toCamelCase($key);
243	1	if (method_exists($src, $getter)) {
244	1	$values[$key] = $src->{$getter}();
245	1	}
246	1	}
247	1	return $values;
248		}
249
250		/**
251		* Extracts value specified by property / field name from object or array.
252		*
253		* This function supports property paths (prop1.prop2.prop3) and getters.
254		*
255		* If $propertyName = 'prop_name', this method will try to extract data in following order from:
256		* - $src['prop_name']
257		* - $src->prop_name
258		* - $src->getPropName()
259		* - $src->prop_name()
260		* - $src->isPropName()
261		*
262		* @experimental
263		* @param array\|object $src
264		* @param string $propertyName
265		* @param mixed $default default value
266		* @param string\|null $delimiter (optional, default value: '.') used to specify property paths
267		* @return mixed
268		*/
269		function getValue($src, $propertyName, $default = null, $delimiter = '.')
270		{
271	2	return getValueByRef($src, $propertyName, $default, $delimiter);
272		}
273
274		/**
275		* Extracts value specified by property / field / method name from object or array by reference if possible.
276		*
277		* This function acts like `mp\getValue` with only difference that value will be returned by reference if possible.
278		*
279		* @experimental
280		* @param array\|object $src
281		* @param string $propertyName
282		* @param mixed $default
283		* @param string\|null $delimiter
284		* @return mixed\|null
285		*/
286		function &getValueByRef(&$src, $propertyName, $default = null, $delimiter = '.')
287		{
288	2	if ($delimiter && $pos = strpos($propertyName, $delimiter)) {
		0 ignored issues – show Bug Best Practice introduced 2016-01-12 20:34 UTC by Report Bug Copy Issue Report The expression `$delimiter` of type `string\|null` is loosely compared to `true`; this is ambiguous if the string can be empty. You might want to explicitly use `!== null` instead. In PHP, under loose comparison (like `==`, or `!=`, or `switch` conditions), values of different types might be equal. For `string` values, the empty string `''` is a special case, in particular the following results might be unexpected: '' == false // true '' == null // true 'ab' == false // false 'ab' == null // false // It is often better to use strict comparison '' === false // false '' === null // false Loading history...
289		// head(a.b.c) = a
290		// tail(a.b.c) = b.c
291	2	$head = substr($propertyName, 0, $pos);
292	2	$tail = substr($propertyName, $pos + 1);
293	2	return getValueByRef(
294	2	getValueByRef($src, $head, $default, null),
295	2	$tail,
296	2	$default,
297		$delimiter
298	2	);
299		}
300
301	2	if (is_array($src)) {
302	2	if (array_key_exists($propertyName, $src)) {
303	2	return $src[$propertyName];
304		}
305	2	} elseif (is_object($src)) {
306	1	if (isset($src->{$propertyName})) {
307		// if it's not magic method, return reference
308	1	if (property_exists($src, $propertyName)) {
309	1	return $src->{$propertyName};
310		// otherwise (it's __get()) calling $src->{$propertyName} will generate PHP notice:
311		// indirect modification of overloaded property has no effect.
312		// Therefore we return link to temp variable instead of link to variable itself.
313		} else {
314		$tmp = $src->{$propertyName};
315		return $tmp;
316		}
317		}
318	1	$camelPropName = Str::toCamelCase($propertyName);
319		$methods = [
320	1	'get' . $camelPropName,
321	1	$propertyName,
322	1	$camelPropName,
323		'is' . $camelPropName
324	1	];
325	1	foreach ($methods as $method) {
326	1	if (method_exists($src, $method)) {
327	1	$result = call_user_func([$src, $method]);
328	1	return $result;
329		}
330	1	}
331	1	}
332	2	return $default;
333		}
334
335		/**
336		* Assigns value, supports property paths (prop1.prop2.prop3).
337		*
338		* @experimental
339		* @param array\|object $target
340		* @param string $propertyName
341		* @param mixed $value
342		* @param string\|null $delimiter
343		* @return bool returns TRUE if value was successfully assigned, FALSE otherwise
344		*/
345		function setValue(&$target, $propertyName, $value, $delimiter = '.')
346		{
347	1	if ($delimiter && $pos = strrpos($propertyName, $delimiter)) {
		0 ignored issues – show Bug Best Practice introduced 2016-01-12 20:34 UTC by Report Bug Copy Issue Report The expression `$delimiter` of type `string\|null` is loosely compared to `true`; this is ambiguous if the string can be empty. You might want to explicitly use `!== null` instead. In PHP, under loose comparison (like `==`, or `!=`, or `switch` conditions), values of different types might be equal. For `string` values, the empty string `''` is a special case, in particular the following results might be unexpected: '' == false // true '' == null // true 'ab' == false // false 'ab' == null // false // It is often better to use strict comparison '' === false // false '' === null // false Loading history...
348		// head(a.b.c) = a.b
349		// tail(a.b.c) = c
350	1	$head = substr($propertyName, 0, $pos);
351	1	$tail = substr($propertyName, $pos + 1);
352	1	$container = &getValueByRef($target, $head, null, $delimiter);
353	1	if (!$container) {
354	1	return false;
355		}
356	1	$res = setValues($container, [$tail => $value]);
357	1	return count($res) === 1;
358		}
359	1	$res = setValues($target, [$propertyName => $value]);
360	1	return count($res) === 1;
361		}
362

Nayjest / manipulator

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mp.php ➔ getValueByRef() C

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