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<?php |
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declare(strict_types=1); |
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namespace Ivory\Connection; |
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/** |
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* Manages date styles as configured by the |
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* {@link https://www.postgresql.org/docs/11/runtime-config-client.html#GUC-DATESTYLE `DateStyle`} configuration |
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* setting. |
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*/ |
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final class DateStyle |
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{ |
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const FORMAT_ISO = 'ISO'; |
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const FORMAT_POSTGRES = 'Postgres'; |
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const FORMAT_SQL = 'SQL'; |
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const FORMAT_GERMAN = 'German'; |
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const ORDER_DMY = 'DMY'; |
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const ORDER_MDY = 'MDY'; |
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const ORDER_YMD = 'YMD'; |
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private $format; |
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private $order; |
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/** |
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* @param string $dateStyleStr the date style string, as held in the <tt>DateStyle</tt> configuration setting |
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* @return DateStyle |
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*/ |
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public static function fromString(string $dateStyleStr): DateStyle |
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{ |
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$parts = preg_split('~\W+~', $dateStyleStr, 2); |
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$fmt = $parts[0]; |
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$ord = ($parts[1] ?? null); |
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switch (strtoupper($fmt)) { |
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case strtoupper(self::FORMAT_ISO): |
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$format = self::FORMAT_ISO; |
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$order = self::ORDER_YMD; |
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break; |
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case strtoupper(self::FORMAT_POSTGRES): |
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$format = self::FORMAT_POSTGRES; |
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$orders = [self::ORDER_MDY, self::ORDER_DMY]; |
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break; |
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case strtoupper(self::FORMAT_SQL): |
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$format = self::FORMAT_SQL; |
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$orders = [self::ORDER_MDY, self::ORDER_DMY]; |
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break; |
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case strtoupper(self::FORMAT_GERMAN): |
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$format = self::FORMAT_GERMAN; |
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$order = self::ORDER_DMY; |
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break; |
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default: |
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trigger_error("Unrecognized DateStyle output format specification: $fmt", E_USER_NOTICE); |
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$format = $fmt; |
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} |
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if (!isset($order)) { |
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switch (strtoupper($ord)) { |
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case strtoupper(self::ORDER_DMY): |
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case strtoupper('Euro'): |
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case strtoupper('European'): |
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$order = self::ORDER_DMY; |
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break; |
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case strtoupper(self::ORDER_MDY): |
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case strtoupper('US'): |
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case strtoupper('NonEuro'): |
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case strtoupper('NonEuropean'): |
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$order = self::ORDER_MDY; |
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break; |
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case strtoupper(self::ORDER_YMD): |
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$order = self::ORDER_YMD; |
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break; |
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default: |
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trigger_error("Unrecognized DateStyle input/output year/month/day ordering: $ord", E_USER_NOTICE); |
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$order = $ord; |
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} |
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if (isset($orders) && !in_array($order, $orders)) { |
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$order = $orders[0]; // irrelevant order, set the default one according to $format |
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} |
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} |
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return new DateStyle($format, $order); |
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} |
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private function __construct(string $format, string $order) |
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{ |
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$this->format = $format; |
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$this->order = $order; |
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} |
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/** |
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* @return string the output format specification; one of <tt>DateStyle::FORMAT_*</tt> constants |
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*/ |
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public function getFormat(): string |
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{ |
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return $this->format; |
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} |
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/** |
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* @return string the input/output specification for year/month/day ordering; |
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* one of <tt>DateStyle::ORDER_*</tt> constants (synonyms are canonicalized to these constants); |
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* irrelevant values are fixed to those valid for the output format |
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*/ |
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public function getOrder(): string |
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{ |
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return $this->order; |
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} |
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} |
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ondrej-bouda /
ivory
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