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<?php |
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namespace LeKoala\GeoTools\Fields; |
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use SilverStripe\Forms\DropdownField; |
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use SilverStripe\ORM\ArrayLib; |
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use SilverStripe\ORM\DataObjectInterface; |
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/** |
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* A timezone dropdown |
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* @link https://www.php.net/manual/en/timezones.others.php |
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* @link https://www.timeanddate.com/time/zones/ |
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*/ |
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class TimezoneDropdown extends DropdownField |
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{ |
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// in yml, it needs to be name/value like so |
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// - name: "Gulf Standard Time (GST)" |
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// value: "Asia/Dubai" |
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private static $aliases = [ |
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// "Gulf Standard Time (GST)" => "Asia/Dubai", |
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// "Central European Time (CET)" => "Europe/Brussels", |
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// "Atlantic Standard Time (AST)" => "America/Blanc-Sablon", |
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// "Eastern Standard Time (EST)" => "America/Panama", |
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// "Central Standard Time (CST)" => "America/Regina", |
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// "Mountain Standard Time (MST)" => "America/Phoenix", |
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// "Pacific Standard Time (PST)" => "America/Los_Angeles", |
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]; |
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/** |
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* @param string $name The field name |
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* @param string $title The field title |
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* @param array|ArrayAccess $source A map of the dropdown items |
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* @param mixed $value The current value |
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*/ |
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public function __construct($name, $title = null, $source = array(), $value = null) |
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{ |
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if (empty($source)) { |
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$source = ArrayLib::valuekey(timezone_identifiers_list()); |
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$aliases = $this->config()->aliases ?? []; |
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if (!empty($aliases)) { |
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$normalizedAliases = []; |
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foreach ($aliases as $k => $v) { |
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// Add a prefix to avoid clashes with regular value |
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if (is_int($k)) { |
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$normalizedAliases[$v['name']] = '_' . $v['value']; |
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} else { |
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$normalizedAliases[$k] = '_' . $v; |
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} |
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} |
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$source = array_flip($normalizedAliases) + $source; |
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} |
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} |
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parent::__construct($name, $title, $source, $value); |
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} |
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public function normalizedAliases() |
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{ |
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$aliases = $this->config()->aliases ?? []; |
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if (!empty($aliases)) { |
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$normalizedAliases = []; |
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foreach ($aliases as $k => $v) { |
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if (is_int($k)) { |
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$normalizedAliases[$v['name']] = $v['value']; |
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} else { |
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$normalizedAliases[$k] = $v; |
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} |
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} |
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return $normalizedAliases; |
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} |
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return []; |
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} |
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public function dataValue() |
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{ |
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return ltrim(parent::dataValue(), '_'); |
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} |
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} |
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