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<?php |
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declare(strict_types=1); |
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namespace SKien\Config; |
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/** |
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* Abstract base class for config components. |
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* |
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* #### History |
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* - *2021-01-01* initial version |
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* |
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* @package SKien/Config |
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* @version 1.0.0 |
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* @author Stefanius <[email protected]> |
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* @copyright MIT License - see the LICENSE file for details |
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*/ |
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abstract class AbstractConfig implements ConfigInterface |
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{ |
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/** @var array holding the config data */ |
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protected ?array $aConfig = null; |
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/** @var string format for date parameters */ |
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protected string $strDateFormat = 'Y-m-d'; |
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/** @var string format for datetime parameters */ |
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protected string $strDateTimeFormat = 'Y-m-d H:i'; |
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/** |
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* Set the format for date parameters. |
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* See the formatting options DateTime::createFromFormat. |
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* In most cases, the same letters as for the date() can be used. |
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* @param string $strFormat |
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* @link https://www.php.net/manual/en/datetime.createfromformat.php |
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*/ |
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public function setDateFormat(string $strFormat) : void |
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{ |
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$this->strDateFormat = $strFormat; |
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} |
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/** |
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* Set the format for datetime parameters. |
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* See the formatting options DateTime::createFromFormat. |
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* In most cases, the same letters as for the date() can be used. |
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* @param string $strFormat |
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* @link https://www.php.net/manual/en/datetime.createfromformat.php |
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*/ |
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public function setDateTimeFormat(string $strFormat) : void |
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{ |
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$this->strDateTimeFormat = $strFormat; |
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} |
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/** |
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* Get the value specified by path. |
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* @param string $strPath |
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* @param mixed $default |
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* @return mixed |
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*/ |
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public function getValue(string $strPath, $default = null) |
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{ |
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if ($this->aConfig === null) { |
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// without valid config file just return the default value |
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return $default; |
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} |
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$aPath = $this->splitPath($strPath); |
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$iDepth = count($aPath); |
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$value = null; |
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$aValues = $this->aConfig; |
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for ($i = 0; $i < $iDepth; $i++) { |
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if (!is_array($aValues)) { |
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$value = null; |
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break; |
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} |
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$value = $aValues[$aPath[$i]] ?? null; |
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if ($value === null) { |
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break; |
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} |
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$aValues = $value; |
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} |
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return $value ?? $default; |
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} |
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/** |
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* Get the string value specified by path. |
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* @param string $strPath |
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* @param string $strDefault |
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* @return string |
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*/ |
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public function getString(string $strPath, string $strDefault = '') : string |
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{ |
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return (string) $this->getValue($strPath, $strDefault); |
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} |
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/** |
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* Get the integer value specified by path. |
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* @param string $strPath |
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* @param int $iDefault |
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* @return int |
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*/ |
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public function getInt(string $strPath, int $iDefault = 0) : int |
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{ |
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return intval($this->getValue($strPath, $iDefault)); |
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} |
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/** |
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* Get the integer value specified by path. |
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* @param string $strPath |
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* @param float $fltDefault |
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* @return float |
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*/ |
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public function getFloat(string $strPath, float $fltDefault = 0.0) : float |
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{ |
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return floatval($this->getValue($strPath, $fltDefault)); |
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} |
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/** |
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* Get the boolean value specified by path. |
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* @param string $strPath |
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* @param bool $bDefault |
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* @return bool |
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*/ |
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public function getBool(string $strPath, bool $bDefault = false) : bool |
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{ |
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$value = $this->getValue($strPath, $bDefault); |
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if (!is_bool($value)) { |
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$value = $this->boolFromString((string) $value, $bDefault); |
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} |
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return $value; |
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} |
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/** |
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* Get the date value specified by path. |
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* @param string $strPath |
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* @param mixed $default default value (unix timestamp, DateTime object or date string) |
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* @return int date as unix timestamp |
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*/ |
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public function getDate(string $strPath, $default = 0) : int |
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{ |
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$date = (string) $this->getValue($strPath, $default); |
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if (!ctype_digit($date)) { |
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$dt = \DateTime::createFromFormat($this->strDateFormat, $date); |
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$date = $default; |
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if ($dt !== false) { |
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$aError = $dt->getLastErrors(); |
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if ($aError['error_count'] == 0) { |
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$dt->setTime(0, 0); |
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$date = $dt->getTimestamp(); |
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} |
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} |
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} else { |
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$date = intval($date); |
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} |
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return $date; |
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} |
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/** |
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* Get the date and time value specified by path as unix timestamp. |
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* @param string $strPath |
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* @param int $default default value (unix timestamp) |
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* @return int unix timestamp |
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*/ |
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public function getDateTime(string $strPath, $default = 0) : int |
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{ |
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$date = (string) $this->getValue($strPath, $default); |
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if (!ctype_digit($date)) { |
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$dt = \DateTime::createFromFormat($this->strDateTimeFormat, $date); |
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$date = $default; |
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if ($dt !== false) { |
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$aError = $dt->getLastErrors(); |
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if ($aError['error_count'] == 0) { |
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$date = $dt->getTimestamp(); |
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} |
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} |
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} else { |
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$date = intval($date); |
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} |
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return $date; |
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} |
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/** |
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* Get the array specified by path. |
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* @param string $strPath |
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* @param array $aDefault |
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* @return array |
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*/ |
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public function getArray(string $strPath, array $aDefault = []) : array |
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{ |
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$value = $this->getValue($strPath, $aDefault); |
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return is_array($value) ? $value : $aDefault; |
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} |
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/** |
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* Returns the internal array. |
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* @return array |
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*/ |
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public function getConfig() : array |
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{ |
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return $this->aConfig ?? []; |
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} |
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/** |
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* Split the given path in its components. |
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* @param string $strPath |
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* @return array |
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*/ |
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protected function splitPath(string $strPath) : array |
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{ |
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return explode('.', $strPath); |
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} |
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/** |
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* Convert string to bool. |
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* Accepted values are (case insensitiv): <ul> |
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* <li> true, on, yes, 1 </li> |
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* <li> false, off, no, none, 0 </li></ul> |
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* for all other values the default value is returned! |
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* @param string $strValue |
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* @param bool $bDefault |
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* @return bool |
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*/ |
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protected function boolFromString(string $strValue, bool $bDefault = false) : bool |
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{ |
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if ($this->isTrue($strValue)) { |
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return true; |
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} else if ($this->isFalse($strValue)) { |
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return false; |
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} else { |
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return $bDefault; |
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} |
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} |
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/** |
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* Checks whether the passed value is a valid expression for bool 'True'. |
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* Accepted values for bool 'true' are (case insensitiv): <i>true, on, yes, 1</i> |
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* @param string $strValue |
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* @return bool |
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*/ |
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protected function isTrue(string $strValue) : bool |
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{ |
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$strValue = strtolower($strValue); |
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return in_array($strValue, ['true', 'on', 'yes', '1']); |
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} |
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/** |
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* Checks whether the passed value is a valid expression for bool 'False'. |
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* Accepted values for bool 'false' are (case insensitiv): <i>false, off, no, none, 0</i> |
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* @param string $strValue |
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* @return bool |
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*/ |
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protected function isFalse(string $strValue) : bool |
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{ |
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$strValue = strtolower($strValue); |
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return in_array($strValue, ['false', 'off', 'no', 'none', '0']); |
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} |
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/** |
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* Merge this instance with values from onather config. |
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* Note that the elemenst of the config to merge with has allways higher priority than |
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* the elements of this instance. <br/> |
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* If both config contains elements with the same key, the value of this instance will be |
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* replaced with the value of the config we merge with. <br/> |
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* <b>So keep allways the order in wich you merge several configs together in mind.</b> |
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* @param AbstractConfig $oMerge |
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*/ |
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public function mergeWith(AbstractConfig $oMerge) : void |
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{ |
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$aMerge = $oMerge->getConfig(); |
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if ($this->aConfig === null) { |
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$this->aConfig = $aMerge; |
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return; |
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} |
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$this->aConfig = $this->mergeArrays($this->aConfig, $aMerge); |
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} |
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/** |
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* Merge the values of two array into one resulting array. |
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* <b>Note: <i>neither array_merge() nor array_merge_recursive() lead to |
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* the desired result</i></b><br/><br/> |
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* Assuming following two config:<pre> |
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* $a1 = ["a" => ["c1" => "red", "c2" => "green"]]; |
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* $a2 = ["a" => ["c2" => "blue", "c3" => "yellow"]]; </pre> |
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* We expect as result for merge($a1, $a2): <pre> |
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* $a3 = ["a" => ["c1" => "red", "c2" => "blue", "c3" => "yellow"]]; </pre> |
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* => [a][c1] remains on "red", [a][c2] "green" is replaced by "blue" and [a][c3] is supplemented with "yellow" <br/><br/> |
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* But <ol> |
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* <li><b>$a3 = array_merge($a1, $a2)</b> will result in: <pre> |
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* $a3 = ["a" => ["c2" => "blue", "c3" => "yellow"]]; </pre> |
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* => the entire element [a] is replaced by the content of $a2 - the sub-elements |
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* of $a1 that are not contained in $a2 are lost! <br/><br/> |
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* </li> |
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* <li><b>$a3 = array_merge_recursive($a1, $a2)</b> will result in: <pre> |
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* $a3 = ["a" => ["c1" => red, "c2" => ["green", "blue"], "c3" => "yellow"]]</pre> |
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* => [a][c2] changes from string to an array ["green", "blue"]! |
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* </li></ol> |
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* @param array $aBase |
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* @param array $aMerge |
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*/ |
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protected function mergeArrays(array $aBase, array $aMerge) : array |
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{ |
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foreach ($aMerge as $keyMerge => $valueMerge) { |
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if (isset($aBase[$keyMerge]) && is_array($aBase[$keyMerge]) && is_array($valueMerge)) { |
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// The element is available in the basic configuration and both elements contains |
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// an array |
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// -> call mergeArray () recursively, unless it is a zero index based array in both cases |
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if ($this->isAssoc($aBase[$keyMerge]) || $this->isAssoc($valueMerge)) { |
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$aBase[$keyMerge] = $this->mergeArrays($aBase[$keyMerge], $valueMerge); |
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continue; |
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} |
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} |
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// in all other cases either the element from the array that is to be merged is inserted |
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// or it has priority over the original element |
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$aBase[$keyMerge] = $valueMerge; |
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} |
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return $aBase; |
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} |
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/** |
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* Check if given array is associative. |
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* Only if the array exactly has sequential numeric keys, starting from 0, the |
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* array is NOT associative. |
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* @param array $a |
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* @return bool |
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*/ |
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protected function isAssoc(array $a) : bool |
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{ |
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if ($a === []) { |
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return false; |
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} |
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return array_keys($a) !== range(0, count($a) - 1); |
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} |
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} |