Filterer::ofArrays() - Code Metrics - Inspection of "[WIP] Version 3" - traderinteractive/filter-php - Measure and Improve Code Quality continuously with Scrutinizer

Failed Conditions

Pull Request — master (#76)

by Chad

created 2018-03-07 12:56 UTC

Filterer::ofArrays() B

↳ Parent: Filterer

Complexity

Conditions	5
Paths	8

Size

Total Lines	25
Code Lines	15

Duplication

Lines	0
Ratio	0 %

Importance

Changes

Metric	Value
dl	0
loc	25
rs	8.439
c	0
b	0
f	0
cc	5
eloc	15
nc	8
nop	2

<?php

namespace TraderInteractive;

use Exception;
use Throwable;

/**
 * Class to filter an array of input.
 */
final class Filterer
{
    /**
     * @var array
     */
    const DEFAULT_FILTER_ALIASES = [
        'in' => '\TraderInteractive\Filter\Arrays::in',
        'array' => '\TraderInteractive\Filter\Arrays::filter',
        'bool' => '\TraderInteractive\Filter\Booleans::filter',
        'float' => '\TraderInteractive\Filter\Floats::filter',
        'int' => '\TraderInteractive\Filter\Ints::filter',
        'bool-convert' => '\TraderInteractive\Filter\Booleans::convert',
        'uint' => '\TraderInteractive\Filter\UnsignedInt::filter',
        'string' => '\TraderInteractive\Filter\Strings::filter',
        'ofScalars' => '\TraderInteractive\Filterer::ofScalars',
        'ofArrays' => '\TraderInteractive\Filterer::ofArrays',
        'ofArray' => '\TraderInteractive\Filterer::ofArray',
        'url' => '\TraderInteractive\Filter\Url::filter',
        'email' => '\TraderInteractive\Filter\Email::filter',
        'explode' => '\TraderInteractive\Filter\Strings::explode',
        'flatten' => '\TraderInteractive\Filter\Arrays::flatten',
        'date' => '\TraderInteractive\Filter\DateTime::filter',
        'date-format' => '\TraderInteractive\Filter\DateTime::format',
        'timezone' => '\TraderInteractive\Filter\DateTimeZone::filter',
    ];

    /**
     * @var array
     */
    private static $filterAliases = self::DEFAULT_FILTER_ALIASES;

    /**
     * Example:
     * <pre>
     * <?php
     * class AppendFilter
     * {
     *     public function filter($value, $extraArg)
     *     {
     *         return $value . $extraArg;
     *     }
     * }
     * $appendFilter = new AppendFilter();
     *
     * $trimFunc = function($val) { return trim($val); };
     *
     * list($status, $result, $error, $unknowns) = TraderInteractive\Filterer::filter(
     *     [
     *         'field one' => [[$trimFunc], ['substr', 0, 3], [[$appendFilter, 'filter'], 'boo']],
     *         'field two' => ['required' => true, ['floatval']],
     *         'field three' => ['required' => false, ['float']],
     *         'field four' => ['required' => true, 'default' => 1, ['uint']],
     *     ],
     *     ['field one' => ' abcd', 'field two' => '3.14']
     * );
     *
     * var_dump($status);
     * var_dump($result);
     * var_dump($error);
     * var_dump($unknowns);
     * </pre>
     * prints:
     * <pre>
     * bool(true)
     * array(3) {
     *   'field one' =>
     *   string(6) "abcboo"
     *   'field two' =>
     *   double(3.14)
     *   'field four' =>
     *   int(1)
     * }
     * NULL
     * array(0) {
     * }
     * </pre>
     *
     * @param array $spec the specification to apply to the $input. An array where each key is a known input field and
     *                    each value is an array of filters. Each filter should be an array with the first member being
     *                    anything that can pass is_callable() as well as accepting the value to filter as its first
     *                    argument. Two examples would be the string 'trim' or an object function specified like [$obj,
     *                    'filter'], see is_callable() documentation. The rest of the members are extra arguments to the
     *                    callable. The result of one filter will be the first argument to the next filter. In addition
     *                    to the filters, the specification values may contain a 'required' key (default false) that
     *                    controls the same behavior as the 'defaultRequired' option below but on a per field basis. A
     *                    'default' specification value may be used to substitute in a default to the $input when the
     *                    key is not present (whether 'required' is specified or not).
     * @param array $input the input the apply the $spec on.
     * @param array $options 'allowUnknowns' (default false) true to allow unknowns or false to treat as error,
     *                       'defaultRequired' (default false) true to make fields required by default and treat as
     *                       error on absence and false to allow their absence by default
     *
     * @return array on success [true, $input filtered, null, array of unknown fields]
     *     on error [false, null, 'error message', array of unknown fields]
     *
     * @throws Exception
     * @throws \InvalidArgumentException if 'allowUnknowns' option was not a bool
     * @throws \InvalidArgumentException if 'defaultRequired' option was not a bool
     * @throws \InvalidArgumentException if filters for a field was not a array
     * @throws \InvalidArgumentException if a filter for a field was not a array
     * @throws \InvalidArgumentException if 'required' for a field was not a bool
     */
    public static function filter(array $spec, array $input, array $options = []) : array
    {
        $options += ['allowUnknowns' => false, 'defaultRequired' => false];

        $allowUnknowns = self::getAllowUnknowns($options);
        $defaultRequired = self::getDefaultRequired($options);

        $inputToFilter = array_intersect_key($input, $spec);
        $leftOverSpec = array_diff_key($spec, $input);
        $leftOverInput = array_diff_key($input, $spec);

        $errors = [];
        foreach ($inputToFilter as $field => $value) {
            $filters = $spec[$field];
            self::assertFiltersIsAnArray($filters, $field);
            $customError = self::validateCustomError($filters, $field);
            unset($filters['required']);//doesn't matter if required since we have this one
            unset($filters['default']);//doesn't matter if there is a default since we have a value
            foreach ($filters as $filter) {
                self::assertFilterIsNotArray($filter, $field);

                if (empty($filter)) {
                    continue;
                }

                $function = array_shift($filter);
                $function = self::handleFilterAliases($function);

                self::assertFunctionIsCallable($function, $field);

                array_unshift($filter, $value);
                try {
                    $value = call_user_func_array($function, $filter);
                } catch (Exception $e) {
                    $errors = self::handleCustomError($field, $value, $e, $errors, $customError);
                    continue 2;//next field
                }
            }

            $inputToFilter[$field] = $value;
        }

        foreach ($leftOverSpec as $field => $filters) {
            self::assertFiltersIsAnArray($filters, $field);
            $required = self::getRequired($filters, $defaultRequired, $field);
            if (array_key_exists('default', $filters)) {
                $inputToFilter[$field] = $filters['default'];
                continue;
            }

            $errors = self::handleRequiredFields($required, $field, $errors);
        }

        $errors = self::handleAllowUnknowns($allowUnknowns, $leftOverInput, $errors);

        if (empty($errors)) {
            return [true, $inputToFilter, null, $leftOverInput];
        }

        return [false, null, implode("\n", $errors), $leftOverInput];
    }

    /**
     * Return the filter aliases.
     *
     * @return array array where keys are aliases and values pass is_callable().
     */
    public static function getFilterAliases() : array
    {
        return self::$filterAliases;
    }

    /**
     * Set the filter aliases.
     *
     * @param array $aliases array where keys are aliases and values pass is_callable().
     * @return void
     *
     * @throws Exception Thrown if any of the given $aliases is not valid. @see registerAlias()
     */
    public static function setFilterAliases(array $aliases)
    {
        $originalAliases = self::$filterAliases;
        self::$filterAliases = [];
        try {
            foreach ($aliases as $alias => $callback) {
                self::registerAlias($alias, $callback);
            }
        } catch (Exception $e) {
            self::$filterAliases = $originalAliases;
            throw $e;
        }
    }

    /**
     * Register a new alias with the Filterer
     *
     * @param string|int $alias the alias to register
     * @param callable $filter the aliased callable filter
     * @param bool $overwrite Flag to overwrite existing alias if it exists
     *
     * @return void
     *
     * @throws \InvalidArgumentException if $alias was not a string or int
     * @throws Exception if $overwrite is false and $alias exists
     */
    public static function registerAlias($alias, callable $filter, bool $overwrite = false)
    {
        self::assertIfStringOrInt($alias);
        self::assertIfAliasExists($alias, $overwrite);
        self::$filterAliases[$alias] = $filter;
    }

    /**
     * Filter an array by applying filters to each member
     *
     * @param array $values an array to be filtered. Use the Arrays::filter() before this method to ensure counts when
     *                      you pass into Filterer
     * @param array $filters filters with each specified the same as in @see self::filter.
     *                       Eg [['string', false, 2], ['uint']]
     *
     * @return array the filtered $values
     *
     * @throws Exception if any member of $values fails filtering
     */
    public static function ofScalars(array $values, array $filters) : array
    {
        $wrappedFilters = [];
        foreach ($values as $key => $item) {
            $wrappedFilters[$key] = $filters;
        }

        list($status, $result, $error) = self::filter($wrappedFilters, $values);
        if (!$status) {
            throw new Exception($error);
        }

        return $result;
    }

    /**
     * Filter an array by applying filters to each member
     *
     * @param array $values as array to be filtered. Use the Arrays::filter() before this method to ensure counts when
     *                      you pass into Filterer
     * @param array $spec spec to apply to each $values member, specified the same as in @see self::filter.
     *     Eg ['key' => ['required' => true, ['string', false], ['unit']], 'key2' => ...]
     *
     * @return array the filtered $values
     *
     * @throws Exception if any member of $values fails filtering
     */
    public static function ofArrays(array $values, array $spec) : array
    {
        $results = [];
        $errors = [];
        foreach ($values as $key => $item) {
            if (!is_array($item)) {
                $errors[] = "Value at position '{$key}' was not an array";
                continue;
            }

            list($status, $result, $error) = self::filter($spec, $item);
            if (!$status) {
                $errors[] = $error;
                continue;
            }

            $results[$key] = $result;
        }

        if (!empty($errors)) {
            throw new Exception(implode("\n", $errors));
        }

        return $results;
    }

    /**
     * Filter $value by using a Filterer $spec and Filterer's default options.
     *
     * @param array $value array to be filtered. Use the Arrays::filter() before this method to ensure counts when you
     *                     pass into Filterer
     * @param array $spec spec to apply to $value, specified the same as in @see self::filter.
     *     Eg ['key' => ['required' => true, ['string', false], ['unit']], 'key2' => ...]
     *
     * @return array the filtered $value
     *
     * @throws Exception if $value fails filtering
     */
    public static function ofArray(array $value, array $spec) : array
    {
        list($status, $result, $error) = self::filter($spec, $value);
        if (!$status) {
            throw new Exception($error);
        }

        return $result;
    }

    private static function assertIfStringOrInt($alias)
    {
        if (!is_string($alias) && !is_int($alias)) {
            throw new \InvalidArgumentException('$alias was not a string or int');
        }
    }

    private static function assertIfAliasExists($alias, bool $overwrite)
    {
        if (array_key_exists($alias, self::$filterAliases) && !$overwrite) {
            throw new Exception("Alias '{$alias}' exists");
        }
    }

    private static function checkForUnknowns(array $leftOverInput, array $errors) : array
    {
        foreach ($leftOverInput as $field => $value) {
            $errors[] = "Field '{$field}' with value '" . trim(var_export($value, true), "'") . "' is unknown";
        }

        return $errors;
    }

    private static function handleAllowUnknowns(bool $allowUnknowns, array $leftOverInput, array $errors) : array
    {
        if (!$allowUnknowns) {
            $errors = self::checkForUnknowns($leftOverInput, $errors);
        }

        return $errors;
    }

    private static function handleRequiredFields(bool $required, string $field, array $errors) : array
    {
        if ($required) {
            $errors[] = "Field '{$field}' was required and not present";
        }
        return $errors;
    }

    private static function getRequired($filters, $defaultRequired, $field) : bool
    {
        $required = isset($filters['required']) ? $filters['required'] : $defaultRequired;
        if ($required !== false && $required !== true) {
            throw new \InvalidArgumentException("'required' for field '{$field}' was not a bool");
        }

        return $required;
    }

    private static function assertFiltersIsAnArray($filters, string $field)
    {
        if (!is_array($filters)) {
            throw new \InvalidArgumentException("filters for field '{$field}' was not a array");
        }
    }

    private static function handleCustomError(
        string $field,
        $value,
        Throwable $e,
        array $errors,
        string $customError = null
    ) : array {
        $error = $customError;
        if ($error === null) {
            $error = sprintf(
                "Field '%s' with value '%s' failed filtering, message '%s'",
                $field,
                trim(var_export($value, true), "'"),
                $e->getMessage()
            );
        }

        $errors[] = $error;
        return $errors;
    }

    private static function assertFunctionIsCallable($function, string $field)
    {
        if (!is_callable($function)) {
            throw new Exception(
                "Function '" . trim(var_export($function, true), "'") . "' for field '{$field}' is not callable"
            );
        }
    }

    private static function handleFilterAliases($function)
    {
        if ((is_string($function) || is_int($function)) && array_key_exists($function, self::$filterAliases)) {
            $function = self::$filterAliases[$function];
        }

        return $function;
    }

    private static function assertFilterIsNotArray($filter, string $field)
    {
        if (!is_array($filter)) {
            throw new \InvalidArgumentException("filter for field '{$field}' was not a array");
        }
    }

    private static function validateCustomError(array $filters, string $field)
    {
        $customError = null;
        if (array_key_exists('error', $filters)) {
            $customError = $filters['error'];
            if (!is_string($customError) || trim($customError) === '') {
                throw new \InvalidArgumentException("error for field '{$field}' was not a non-empty string");
            }

            unset($filters['error']);//unset so its not used as a filter
        }

        return $customError;
    }

    private static function getAllowUnknowns(array $options) : bool
    {
        $allowUnknowns = $options['allowUnknowns'];
        if ($allowUnknowns !== false && $allowUnknowns !== true) {
            throw new \InvalidArgumentException("'allowUnknowns' option was not a bool");
        }

        return $allowUnknowns;
    }

    private static function getDefaultRequired(array $options) : bool
    {
        $defaultRequired = $options['defaultRequired'];
        if ($defaultRequired !== false && $defaultRequired !== true) {
            throw new \InvalidArgumentException("'defaultRequired' option was not a bool");
        }

        return $defaultRequired;
    }
}


1			<?php
2
3			namespace TraderInteractive;
4
5			use Exception;
6			use Throwable;
7
8			/**
9			* Class to filter an array of input.
10			*/
11			final class Filterer
12			{
13			/**
14			* @var array
15			*/
16			const DEFAULT_FILTER_ALIASES = [
17			'in' => '\TraderInteractive\Filter\Arrays::in',
18			'array' => '\TraderInteractive\Filter\Arrays::filter',
19			'bool' => '\TraderInteractive\Filter\Booleans::filter',
20			'float' => '\TraderInteractive\Filter\Floats::filter',
21			'int' => '\TraderInteractive\Filter\Ints::filter',
22			'bool-convert' => '\TraderInteractive\Filter\Booleans::convert',
23			'uint' => '\TraderInteractive\Filter\UnsignedInt::filter',
24			'string' => '\TraderInteractive\Filter\Strings::filter',
25			'ofScalars' => '\TraderInteractive\Filterer::ofScalars',
26			'ofArrays' => '\TraderInteractive\Filterer::ofArrays',
27			'ofArray' => '\TraderInteractive\Filterer::ofArray',
28			'url' => '\TraderInteractive\Filter\Url::filter',
29			'email' => '\TraderInteractive\Filter\Email::filter',
30			'explode' => '\TraderInteractive\Filter\Strings::explode',
31			'flatten' => '\TraderInteractive\Filter\Arrays::flatten',
32			'date' => '\TraderInteractive\Filter\DateTime::filter',
33			'date-format' => '\TraderInteractive\Filter\DateTime::format',
34			'timezone' => '\TraderInteractive\Filter\DateTimeZone::filter',
35			];
36
37			/**
38			* @var array
39			*/
40			private static $filterAliases = self::DEFAULT_FILTER_ALIASES;
41
42			/**
43			* Example:
44			* <pre>
45			* <?php
46			* class AppendFilter
47			* {
48			* public function filter($value, $extraArg)
49			* {
50			* return $value . $extraArg;
51			* }
52			* }
53			* $appendFilter = new AppendFilter();
54			*
55			* $trimFunc = function($val) { return trim($val); };
56			*
57			* list($status, $result, $error, $unknowns) = TraderInteractive\Filterer::filter(
58			* [
59			* 'field one' => [[$trimFunc], ['substr', 0, 3], [[$appendFilter, 'filter'], 'boo']],
60			* 'field two' => ['required' => true, ['floatval']],
61			* 'field three' => ['required' => false, ['float']],
62			* 'field four' => ['required' => true, 'default' => 1, ['uint']],
63			* ],
64			* ['field one' => ' abcd', 'field two' => '3.14']
65			* );
66			*
67			* var_dump($status);
68			* var_dump($result);
69			* var_dump($error);
70			* var_dump($unknowns);
71			* </pre>
72			* prints:
73			* <pre>
74			* bool(true)
75			* array(3) {
76			* 'field one' =>
77			* string(6) "abcboo"
78			* 'field two' =>
79			* double(3.14)
80			* 'field four' =>
81			* int(1)
82			* }
83			* NULL
84			* array(0) {
85			* }
86			* </pre>
87			*
88			* @param array $spec the specification to apply to the $input. An array where each key is a known input field and
89			* each value is an array of filters. Each filter should be an array with the first member being
90			* anything that can pass is_callable() as well as accepting the value to filter as its first
91			* argument. Two examples would be the string 'trim' or an object function specified like [$obj,
92			* 'filter'], see is_callable() documentation. The rest of the members are extra arguments to the
93			* callable. The result of one filter will be the first argument to the next filter. In addition
94			* to the filters, the specification values may contain a 'required' key (default false) that
95			* controls the same behavior as the 'defaultRequired' option below but on a per field basis. A
96			* 'default' specification value may be used to substitute in a default to the $input when the
97			* key is not present (whether 'required' is specified or not).
98			* @param array $input the input the apply the $spec on.
99			* @param array $options 'allowUnknowns' (default false) true to allow unknowns or false to treat as error,
100			* 'defaultRequired' (default false) true to make fields required by default and treat as
101			* error on absence and false to allow their absence by default
102			*
103			* @return array on success [true, $input filtered, null, array of unknown fields]
104			* on error [false, null, 'error message', array of unknown fields]
105			*
106			* @throws Exception
107			* @throws \InvalidArgumentException if 'allowUnknowns' option was not a bool
108			* @throws \InvalidArgumentException if 'defaultRequired' option was not a bool
109			* @throws \InvalidArgumentException if filters for a field was not a array
110			* @throws \InvalidArgumentException if a filter for a field was not a array
111			* @throws \InvalidArgumentException if 'required' for a field was not a bool
112			*/
113			public static function filter(array $spec, array $input, array $options = []) : array
114			{
115			$options += ['allowUnknowns' => false, 'defaultRequired' => false];
116
117			$allowUnknowns = self::getAllowUnknowns($options);
118			$defaultRequired = self::getDefaultRequired($options);
119
120			$inputToFilter = array_intersect_key($input, $spec);
121			$leftOverSpec = array_diff_key($spec, $input);
122			$leftOverInput = array_diff_key($input, $spec);
123
124			$errors = [];
125			foreach ($inputToFilter as $field => $value) {
126			$filters = $spec[$field];
127			self::assertFiltersIsAnArray($filters, $field);
128			$customError = self::validateCustomError($filters, $field);
129			unset($filters['required']);//doesn't matter if required since we have this one
130			unset($filters['default']);//doesn't matter if there is a default since we have a value
131			foreach ($filters as $filter) {
132			self::assertFilterIsNotArray($filter, $field);
133
134			if (empty($filter)) {
135			continue;
136			}
137
138			$function = array_shift($filter);
139			$function = self::handleFilterAliases($function);
140
141			self::assertFunctionIsCallable($function, $field);
142
143			array_unshift($filter, $value);
144			try {
145			$value = call_user_func_array($function, $filter);
146			} catch (Exception $e) {
147			$errors = self::handleCustomError($field, $value, $e, $errors, $customError);
148			continue 2;//next field
149			}
150			}
151
152			$inputToFilter[$field] = $value;
153			}
154
155			foreach ($leftOverSpec as $field => $filters) {
156			self::assertFiltersIsAnArray($filters, $field);
157			$required = self::getRequired($filters, $defaultRequired, $field);
158			if (array_key_exists('default', $filters)) {
159			$inputToFilter[$field] = $filters['default'];
160			continue;
161			}
162
163			$errors = self::handleRequiredFields($required, $field, $errors);
164			}
165
166			$errors = self::handleAllowUnknowns($allowUnknowns, $leftOverInput, $errors);
167
168			if (empty($errors)) {
169			return [true, $inputToFilter, null, $leftOverInput];
170			}
171
172			return [false, null, implode("\n", $errors), $leftOverInput];
173			}
174
175			/**
176			* Return the filter aliases.
177			*
178			* @return array array where keys are aliases and values pass is_callable().
179			*/
180			public static function getFilterAliases() : array
181			{
182			return self::$filterAliases;
183			}
184
185			/**
186			* Set the filter aliases.
187			*
188			* @param array $aliases array where keys are aliases and values pass is_callable().
189			* @return void
190			*
191			* @throws Exception Thrown if any of the given $aliases is not valid. @see registerAlias()
192			*/
193			public static function setFilterAliases(array $aliases)
194			{
195			$originalAliases = self::$filterAliases;
196			self::$filterAliases = [];
197			try {
198			foreach ($aliases as $alias => $callback) {
199			self::registerAlias($alias, $callback);
200			}
201			} catch (Exception $e) {
202			self::$filterAliases = $originalAliases;
203			throw $e;
204			}
205			}
206
207			/**
208			* Register a new alias with the Filterer
209			*
210			* @param string\|int $alias the alias to register
211			* @param callable $filter the aliased callable filter
212			* @param bool $overwrite Flag to overwrite existing alias if it exists
213			*
214			* @return void
215			*
216			* @throws \InvalidArgumentException if $alias was not a string or int
217			* @throws Exception if $overwrite is false and $alias exists
218			*/
219			public static function registerAlias($alias, callable $filter, bool $overwrite = false)
220			{
221			self::assertIfStringOrInt($alias);
222			self::assertIfAliasExists($alias, $overwrite);
223			self::$filterAliases[$alias] = $filter;
224			}
225
226			/**
227			* Filter an array by applying filters to each member
228			*
229			* @param array $values an array to be filtered. Use the Arrays::filter() before this method to ensure counts when
230			* you pass into Filterer
231			* @param array $filters filters with each specified the same as in @see self::filter.
232			* Eg [['string', false, 2], ['uint']]
233			*
234			* @return array the filtered $values
235			*
236			* @throws Exception if any member of $values fails filtering
237			*/
238			public static function ofScalars(array $values, array $filters) : array
239			{
240			$wrappedFilters = [];
241			foreach ($values as $key => $item) {
242			$wrappedFilters[$key] = $filters;
243			}
244
245			list($status, $result, $error) = self::filter($wrappedFilters, $values);
246			if (!$status) {
247			throw new Exception($error);
248			}
249
250			return $result;
251			}
252
253			/**
254			* Filter an array by applying filters to each member
255			*
256			* @param array $values as array to be filtered. Use the Arrays::filter() before this method to ensure counts when
257			* you pass into Filterer
258			* @param array $spec spec to apply to each $values member, specified the same as in @see self::filter.
259			* Eg ['key' => ['required' => true, ['string', false], ['unit']], 'key2' => ...]
260			*
261			* @return array the filtered $values
262			*
263			* @throws Exception if any member of $values fails filtering
264			*/
265			public static function ofArrays(array $values, array $spec) : array
266			{
267			$results = [];
268			$errors = [];
269			foreach ($values as $key => $item) {
270			if (!is_array($item)) {
271			$errors[] = "Value at position '{$key}' was not an array";
272			continue;
273			}
274
275			list($status, $result, $error) = self::filter($spec, $item);
276			if (!$status) {
277			$errors[] = $error;
278			continue;
279			}
280
281			$results[$key] = $result;
282			}
283
284			if (!empty($errors)) {
285			throw new Exception(implode("\n", $errors));
286			}
287
288			return $results;
289			}
290
291			/**
292			* Filter $value by using a Filterer $spec and Filterer's default options.
293			*
294			* @param array $value array to be filtered. Use the Arrays::filter() before this method to ensure counts when you
295			* pass into Filterer
296			* @param array $spec spec to apply to $value, specified the same as in @see self::filter.
297			* Eg ['key' => ['required' => true, ['string', false], ['unit']], 'key2' => ...]
298			*
299			* @return array the filtered $value
300			*
301			* @throws Exception if $value fails filtering
302			*/
303			public static function ofArray(array $value, array $spec) : array
304			{
305			list($status, $result, $error) = self::filter($spec, $value);
306			if (!$status) {
307			throw new Exception($error);
308			}
309
310			return $result;
311			}
312
313			private static function assertIfStringOrInt($alias)
314			{
315			if (!is_string($alias) && !is_int($alias)) {
316			throw new \InvalidArgumentException('$alias was not a string or int');
317			}
318			}
319
320			private static function assertIfAliasExists($alias, bool $overwrite)
321			{
322			if (array_key_exists($alias, self::$filterAliases) && !$overwrite) {
323			throw new Exception("Alias '{$alias}' exists");
324			}
325			}
326
327			private static function checkForUnknowns(array $leftOverInput, array $errors) : array
328			{
329			foreach ($leftOverInput as $field => $value) {
330			$errors[] = "Field '{$field}' with value '" . trim(var_export($value, true), "'") . "' is unknown";
331			}
332
333			return $errors;
334			}
335
336			private static function handleAllowUnknowns(bool $allowUnknowns, array $leftOverInput, array $errors) : array
337			{
338			if (!$allowUnknowns) {
339			$errors = self::checkForUnknowns($leftOverInput, $errors);
340			}
341
342			return $errors;
343			}
344
345			private static function handleRequiredFields(bool $required, string $field, array $errors) : array
346			{
347			if ($required) {
348			$errors[] = "Field '{$field}' was required and not present";
349			}
350			return $errors;
351			}
352
353			private static function getRequired($filters, $defaultRequired, $field) : bool
354			{
355			$required = isset($filters['required']) ? $filters['required'] : $defaultRequired;
356			if ($required !== false && $required !== true) {
357			throw new \InvalidArgumentException("'required' for field '{$field}' was not a bool");
358			}
359
360			return $required;
361			}
362
363			private static function assertFiltersIsAnArray($filters, string $field)
364			{
365			if (!is_array($filters)) {
366			throw new \InvalidArgumentException("filters for field '{$field}' was not a array");
367			}
368			}
369
370			private static function handleCustomError(
371			string $field,
372			$value,
373			Throwable $e,
374			array $errors,
375			string $customError = null
376			) : array {
377			$error = $customError;
378			if ($error === null) {
379			$error = sprintf(
380			"Field '%s' with value '%s' failed filtering, message '%s'",
381			$field,
382			trim(var_export($value, true), "'"),
383			$e->getMessage()
384			);
385			}
386
387			$errors[] = $error;
388			return $errors;
389			}
390
391			private static function assertFunctionIsCallable($function, string $field)
392			{
393			if (!is_callable($function)) {
394			throw new Exception(
395			"Function '" . trim(var_export($function, true), "'") . "' for field '{$field}' is not callable"
396			);
397			}
398			}
399
400			private static function handleFilterAliases($function)
401			{
402			if ((is_string($function) \|\| is_int($function)) && array_key_exists($function, self::$filterAliases)) {
403			$function = self::$filterAliases[$function];
404			}
405
406			return $function;
407			}
408
409			private static function assertFilterIsNotArray($filter, string $field)
410			{
411			if (!is_array($filter)) {
412			throw new \InvalidArgumentException("filter for field '{$field}' was not a array");
413			}
414			}
415
416			private static function validateCustomError(array $filters, string $field)
417			{
418			$customError = null;
419			if (array_key_exists('error', $filters)) {
420			$customError = $filters['error'];
421			if (!is_string($customError) \|\| trim($customError) === '') {
422			throw new \InvalidArgumentException("error for field '{$field}' was not a non-empty string");
423			}
424
425			unset($filters['error']);//unset so its not used as a filter
426			}
427
428			return $customError;
429			}
430
431			private static function getAllowUnknowns(array $options) : bool
432			{
433			$allowUnknowns = $options['allowUnknowns'];
434			if ($allowUnknowns !== false && $allowUnknowns !== true) {
435			throw new \InvalidArgumentException("'allowUnknowns' option was not a bool");
436			}
437
438			return $allowUnknowns;
439			}
440
441			private static function getDefaultRequired(array $options) : bool
442			{
443			$defaultRequired = $options['defaultRequired'];
444			if ($defaultRequired !== false && $defaultRequired !== true) {
445			throw new \InvalidArgumentException("'defaultRequired' option was not a bool");
446			}
447
448			return $defaultRequired;
449			}
450			}
451

traderinteractive / filter-php

Pull Request — master (#76)

Filterer::ofArrays() B

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