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<?php |
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/** |
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* @package s9e\TextFormatter |
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* @copyright Copyright (c) The s9e authors |
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* @license http://www.opensource.org/licenses/mit-license.php The MIT License |
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*/ |
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namespace s9e\TextFormatter\Configurator\Helpers; |
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use RuntimeException; |
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use s9e\TextFormatter\Configurator\ConfigProvider; |
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use s9e\TextFormatter\Configurator\FilterableConfigValue; |
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use s9e\TextFormatter\Configurator\JavaScript\Dictionary; |
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use Traversable; |
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abstract class ConfigHelper |
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{ |
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/** |
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* Recursively filter a config array to replace variants with the desired value |
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* |
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* @param array $config Config array |
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* @param string $target Target parser |
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* @return array Filtered config |
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*/ |
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public static function filterConfig(array $config, $target = 'PHP') |
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{ |
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$filteredConfig = []; |
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foreach ($config as $name => $value) |
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{ |
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if ($value instanceof FilterableConfigValue) |
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{ |
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$value = $value->filterConfig($target); |
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if (!isset($value)) |
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{ |
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continue; |
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} |
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} |
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if (is_array($value)) |
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{ |
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$value = self::filterConfig($value, $target); |
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} |
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$filteredConfig[$name] = $value; |
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} |
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return $filteredConfig; |
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} |
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/** |
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* Generate a quickMatch string from a list of strings |
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* |
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* This is basically a LCS implementation, tuned for small strings and fast failure |
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* |
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* @param array $strings Array of strings |
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* @return mixed quickMatch string, or FALSE if none could be generated |
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*/ |
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public static function generateQuickMatchFromList(array $strings) |
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{ |
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foreach ($strings as $string) |
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{ |
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$stringLen = strlen($string); |
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$substrings = []; |
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for ($len = $stringLen; $len; --$len) |
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{ |
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$pos = $stringLen - $len; |
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do |
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{ |
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$substrings[substr($string, $pos, $len)] = 1; |
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} |
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while (--$pos >= 0); |
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} |
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if (isset($goodStrings)) |
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{ |
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$goodStrings = array_intersect_key($goodStrings, $substrings); |
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if (empty($goodStrings)) |
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{ |
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break; |
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} |
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} |
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else |
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{ |
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$goodStrings = $substrings; |
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} |
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} |
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if (empty($goodStrings)) |
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{ |
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return false; |
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} |
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// The strings are stored by length descending, so we return the first in the list |
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return strval(key($goodStrings)); |
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} |
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/** |
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* Optimize the size of a deep array by deduplicating identical structures |
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* |
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* This method is meant to be used on a config array which is only read and never modified |
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* |
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* @param array &$config |
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* @param array &$cache |
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* @return array |
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*/ |
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public static function optimizeArray(array &$config, array &$cache = []) |
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{ |
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foreach ($config as $k => &$v) |
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{ |
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if (!is_array($v)) |
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{ |
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continue; |
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} |
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// Dig deeper into this array |
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self::optimizeArray($v, $cache); |
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// Look for a matching structure |
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$cacheKey = serialize($v); |
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if (!isset($cache[$cacheKey])) |
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{ |
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// Record this value in the cache |
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$cache[$cacheKey] = $v; |
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} |
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// Replace the entry in $config with a reference to the cached value |
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$config[$k] =& $cache[$cacheKey]; |
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} |
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unset($v); |
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} |
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/** |
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* Convert a structure to a (possibly multidimensional) array |
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* |
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* @param mixed $value |
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* @param bool $keepEmpty Whether to keep empty arrays instead of removing them |
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* @param bool $keepNull Whether to keep NULL values instead of removing them |
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* @return array |
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*/ |
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public static function toArray($value, $keepEmpty = false, $keepNull = false) |
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{ |
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$array = []; |
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foreach ($value as $k => $v) |
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{ |
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$isDictionary = $v instanceof Dictionary; |
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if ($v instanceof ConfigProvider) |
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{ |
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$v = $v->asConfig(); |
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} |
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elseif ($v instanceof Traversable || is_array($v)) |
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{ |
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$v = self::toArray($v, $keepEmpty, $keepNull); |
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} |
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elseif (is_scalar($v) || is_null($v)) |
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{ |
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// Do nothing |
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} |
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else |
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{ |
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$type = (is_object($v)) |
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? 'an instance of ' . get_class($v) |
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: 'a ' . gettype($v); |
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throw new RuntimeException('Cannot convert ' . $type . ' to array'); |
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} |
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if (!isset($v) && !$keepNull) |
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{ |
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// We don't record NULL values |
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continue; |
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} |
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if (!$keepEmpty && $v === []) |
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{ |
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// We don't record empty structures |
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continue; |
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} |
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$array[$k] = ($isDictionary) ? new Dictionary($v) : $v; |
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} |
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return $array; |
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} |
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} |
s9e /
TextFormatter
