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<?php |
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|
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/** |
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* This file is part of the Nette Framework (https://nette.org) |
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* Copyright (c) 2004 David Grudl (https://davidgrudl.com) |
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*/ |
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declare (strict_types=1); |
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namespace Packetery\Nette\Utils; |
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|
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use Packetery\Nette; |
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use function is_array, is_int, is_object, count; |
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/** |
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* Array tools library. |
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*/ |
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class Arrays |
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{ |
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use \Packetery\Nette\StaticClass; |
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/** |
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* Returns item from array. If it does not exist, it throws an exception, unless a default value is set. |
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* @param string|int|array $key one or more keys |
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* @param mixed $default |
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* @return mixed |
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* @throws \Packetery\Nette\InvalidArgumentException if item does not exist and default value is not provided |
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*/ |
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public static function get(array $array, $key, $default = null) |
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{ |
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foreach (is_array($key) ? $key : [$key] as $k) { |
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if (is_array($array) && \array_key_exists($k, $array)) { |
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$array = $array[$k]; |
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} else { |
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if (\func_num_args() < 3) { |
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throw new \Packetery\Nette\InvalidArgumentException("Missing item '{$k}'."); |
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} |
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return $default; |
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} |
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} |
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return $array; |
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} |
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/** |
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* Returns reference to array item. If the index does not exist, new one is created with value null. |
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* @param string|int|array $key one or more keys |
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* @return mixed |
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* @throws \Packetery\Nette\InvalidArgumentException if traversed item is not an array |
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*/ |
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public static function &getRef(array &$array, $key) |
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{ |
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foreach (is_array($key) ? $key : [$key] as $k) { |
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if (is_array($array) || $array === null) { |
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$array =& $array[$k]; |
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} else { |
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throw new \Packetery\Nette\InvalidArgumentException('Traversed item is not an array.'); |
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} |
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} |
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return $array; |
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} |
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/** |
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* Recursively merges two fields. It is useful, for example, for merging tree structures. It behaves as |
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* the + operator for array, ie. it adds a key/value pair from the second array to the first one and retains |
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* the value from the first array in the case of a key collision. |
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*/ |
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public static function mergeTree(array $array1, array $array2) : array |
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{ |
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$res = $array1 + $array2; |
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foreach (\array_intersect_key($array1, $array2) as $k => $v) { |
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if (is_array($v) && is_array($array2[$k])) { |
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$res[$k] = self::mergeTree($v, $array2[$k]); |
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} |
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} |
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return $res; |
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} |
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/** |
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* Returns zero-indexed position of given array key. Returns null if key is not found. |
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* @param string|int $key |
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* @return int|null offset if it is found, null otherwise |
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*/ |
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public static function getKeyOffset(array $array, $key) : ?int |
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{ |
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return Helpers::falseToNull(\array_search(self::toKey($key), \array_keys($array), \true)); |
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} |
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/** |
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* @deprecated use getKeyOffset() |
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*/ |
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public static function searchKey(array $array, $key) : ?int |
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{ |
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return self::getKeyOffset($array, $key); |
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} |
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/** |
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* Tests an array for the presence of value. |
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* @param mixed $value |
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*/ |
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public static function contains(array $array, $value) : bool |
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{ |
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return \in_array($value, $array, \true); |
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} |
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/** |
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* Returns the first item from the array or null if array is empty. |
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* @return mixed |
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*/ |
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public static function first(array $array) |
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{ |
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return count($array) ? \reset($array) : null; |
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} |
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/** |
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* Returns the last item from the array or null if array is empty. |
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* @return mixed |
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*/ |
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public static function last(array $array) |
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{ |
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return count($array) ? \end($array) : null; |
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} |
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/** |
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* Inserts the contents of the $inserted array into the $array immediately after the $key. |
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* If $key is null (or does not exist), it is inserted at the beginning. |
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* @param string|int|null $key |
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*/ |
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public static function insertBefore(array &$array, $key, array $inserted) : void |
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{ |
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$offset = $key === null ? 0 : (int) self::getKeyOffset($array, $key); |
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$array = \array_slice($array, 0, $offset, \true) + $inserted + \array_slice($array, $offset, count($array), \true); |
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} |
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/** |
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* Inserts the contents of the $inserted array into the $array before the $key. |
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* If $key is null (or does not exist), it is inserted at the end. |
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* @param string|int|null $key |
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*/ |
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public static function insertAfter(array &$array, $key, array $inserted) : void |
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{ |
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if ($key === null || ($offset = self::getKeyOffset($array, $key)) === null) { |
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$offset = count($array) - 1; |
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} |
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$array = \array_slice($array, 0, $offset + 1, \true) + $inserted + \array_slice($array, $offset + 1, count($array), \true); |
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} |
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/** |
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* Renames key in array. |
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* @param string|int $oldKey |
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* @param string|int $newKey |
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*/ |
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public static function renameKey(array &$array, $oldKey, $newKey) : bool |
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{ |
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$offset = self::getKeyOffset($array, $oldKey); |
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if ($offset === null) { |
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return \false; |
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} |
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$val =& $array[$oldKey]; |
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$keys = \array_keys($array); |
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$keys[$offset] = $newKey; |
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$array = \array_combine($keys, $array); |
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$array[$newKey] =& $val; |
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return \true; |
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} |
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/** |
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* Returns only those array items, which matches a regular expression $pattern. |
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* @throws \Packetery\Nette\RegexpException on compilation or runtime error |
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*/ |
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public static function grep(array $array, string $pattern, int $flags = 0) : array |
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{ |
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return Strings::pcre('preg_grep', [$pattern, $array, $flags]); |
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} |
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/** |
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* Transforms multidimensional array to flat array. |
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*/ |
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public static function flatten(array $array, bool $preserveKeys = \false) : array |
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{ |
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$res = []; |
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$cb = $preserveKeys ? function ($v, $k) use(&$res) : void { |
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$res[$k] = $v; |
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} : function ($v) use(&$res) : void { |
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$res[] = $v; |
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}; |
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\array_walk_recursive($array, $cb); |
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return $res; |
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} |
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/** |
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* Checks if the array is indexed in ascending order of numeric keys from zero, a.k.a list. |
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* @param mixed $value |
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*/ |
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public static function isList($value) : bool |
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{ |
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return is_array($value) && (!$value || \array_keys($value) === \range(0, count($value) - 1)); |
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} |
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/** |
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* Reformats table to associative tree. Path looks like 'field|field[]field->field=field'. |
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* @param string|string[] $path |
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* @return array|\stdClass |
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*/ |
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public static function associate(array $array, $path) |
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{ |
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$parts = is_array($path) ? $path : \preg_split('#(\\[\\]|->|=|\\|)#', $path, -1, \PREG_SPLIT_DELIM_CAPTURE | \PREG_SPLIT_NO_EMPTY); |
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if (!$parts || $parts === ['->'] || $parts[0] === '=' || $parts[0] === '|') { |
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throw new \Packetery\Nette\InvalidArgumentException("Invalid path '{$path}'."); |
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} |
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$res = $parts[0] === '->' ? new \stdClass() : []; |
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foreach ($array as $rowOrig) { |
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$row = (array) $rowOrig; |
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$x =& $res; |
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for ($i = 0; $i < count($parts); $i++) { |
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$part = $parts[$i]; |
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if ($part === '[]') { |
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$x =& $x[]; |
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} elseif ($part === '=') { |
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if (isset($parts[++$i])) { |
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$x = $row[$parts[$i]]; |
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$row = null; |
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} |
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} elseif ($part === '->') { |
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if (isset($parts[++$i])) { |
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if ($x === null) { |
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$x = new \stdClass(); |
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} |
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$x =& $x->{$row[$parts[$i]]}; |
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} else { |
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$row = is_object($rowOrig) ? $rowOrig : (object) $row; |
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} |
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} elseif ($part !== '|') { |
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$x =& $x[(string) $row[$part]]; |
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} |
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} |
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if ($x === null) { |
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$x = $row; |
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} |
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} |
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return $res; |
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} |
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/** |
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* Normalizes array to associative array. Replace numeric keys with their values, the new value will be $filling. |
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* @param mixed $filling |
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*/ |
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public static function normalize(array $array, $filling = null) : array |
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{ |
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$res = []; |
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foreach ($array as $k => $v) { |
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$res[is_int($k) ? $v : $k] = is_int($k) ? $filling : $v; |
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} |
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return $res; |
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} |
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/** |
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* Returns and removes the value of an item from an array. If it does not exist, it throws an exception, |
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* or returns $default, if provided. |
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* @param string|int $key |
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* @param mixed $default |
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* @return mixed |
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* @throws \Packetery\Nette\InvalidArgumentException if item does not exist and default value is not provided |
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*/ |
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public static function pick(array &$array, $key, $default = null) |
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{ |
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if (\array_key_exists($key, $array)) { |
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$value = $array[$key]; |
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unset($array[$key]); |
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return $value; |
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} elseif (\func_num_args() < 3) { |
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throw new \Packetery\Nette\InvalidArgumentException("Missing item '{$key}'."); |
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} else { |
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return $default; |
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} |
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} |
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/** |
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* Tests whether at least one element in the array passes the test implemented by the |
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* provided callback with signature `function ($value, $key, array $array): bool`. |
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*/ |
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public static function some(iterable $array, callable $callback) : bool |
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{ |
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foreach ($array as $k => $v) { |
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if ($callback($v, $k, $array)) { |
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return \true; |
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} |
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} |
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return \false; |
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} |
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/** |
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* Tests whether all elements in the array pass the test implemented by the provided function, |
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* which has the signature `function ($value, $key, array $array): bool`. |
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*/ |
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public static function every(iterable $array, callable $callback) : bool |
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{ |
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foreach ($array as $k => $v) { |
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if (!$callback($v, $k, $array)) { |
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return \false; |
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} |
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} |
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return \true; |
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} |
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/** |
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* Calls $callback on all elements in the array and returns the array of return values. |
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* The callback has the signature `function ($value, $key, array $array): bool`. |
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*/ |
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public static function map(iterable $array, callable $callback) : array |
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{ |
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$res = []; |
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foreach ($array as $k => $v) { |
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$res[$k] = $callback($v, $k, $array); |
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} |
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return $res; |
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} |
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/** |
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* Invokes all callbacks and returns array of results. |
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* @param callable[] $callbacks |
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*/ |
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public static function invoke(iterable $callbacks, ...$args) : array |
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{ |
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$res = []; |
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foreach ($callbacks as $k => $cb) { |
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$res[$k] = $cb(...$args); |
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} |
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return $res; |
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} |
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/** |
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* Invokes method on every object in an array and returns array of results. |
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* @param object[] $objects |
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*/ |
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public static function invokeMethod(iterable $objects, string $method, ...$args) : array |
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{ |
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$res = []; |
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foreach ($objects as $k => $obj) { |
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$res[$k] = $obj->{$method}(...$args); |
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} |
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return $res; |
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} |
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/** |
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* Copies the elements of the $array array to the $object object and then returns it. |
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* @param object $object |
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* @return object |
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*/ |
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public static function toObject(iterable $array, $object) |
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{ |
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foreach ($array as $k => $v) { |
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$object->{$k} = $v; |
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} |
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return $object; |
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} |
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/** |
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* Converts value to array key. |
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* @param mixed $value |
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* @return int|string |
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*/ |
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public static function toKey($value) |
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{ |
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return \key([$value => null]); |
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} |
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/** |
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* Returns copy of the $array where every item is converted to string |
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* and prefixed by $prefix and suffixed by $suffix. |
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* @return string[] |
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*/ |
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public static function wrap(array $array, string $prefix = '', string $suffix = '') : array |
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{ |
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$res = []; |
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foreach ($array as $k => $v) { |
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$res[$k] = $prefix . $v . $suffix; |
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} |
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return $res; |
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} |
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} |
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|
