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<?php |
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namespace Rexlabs\Smokescreen\Transformer\Props; |
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use DateTime; |
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use DateTimeImmutable; |
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use DateTimeInterface; |
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use DateTimeZone; |
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use Rexlabs\Smokescreen\Definition\DefinitionParser; |
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use Rexlabs\Smokescreen\Exception\InvalidDefinitionException; |
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use Rexlabs\Smokescreen\Helpers\ArrayHelper; |
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use Rexlabs\Smokescreen\Helpers\StrHelper; |
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trait DeclarativeProps |
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{ |
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/** @var array */ |
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protected $props = []; |
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/** @var string Example: 2018-03-08 */ |
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protected $dateFormat = 'Y-m-d'; |
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/** @var string Example: 2018-03-08T19:11:11.234+00:00 */ |
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protected $dateTimeFormat = 'Y-m-d\TH:i:s.vP'; |
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/** @var mixed|null Optionally set a default timezone */ |
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protected $defaultTimezone; |
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/** @var DefinitionParser|null */ |
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protected $definitionParser; |
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public function getProps(): array |
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{ |
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return $this->props; |
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} |
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/** |
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* Get the default date formatter string. |
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* |
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* @return string |
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*/ |
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protected function getDateFormat(): string |
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{ |
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return $this->dateFormat; |
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} |
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/** |
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* Get the default date-time formatter string. |
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* |
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* @return string |
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*/ |
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protected function getDatetimeFormat(): string |
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{ |
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return $this->dateTimeFormat; |
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} |
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/** |
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* Get the default timezone that dates should be coerced into. |
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* A null value means the datetime object will not be converted. |
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* |
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* @return DateTimeZone|string|null |
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*/ |
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protected function getDefaultTimezone() |
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{ |
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return $this->defaultTimezone; |
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} |
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/** |
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* Helper method for returning formatted properties from a source object |
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* or array. |
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* |
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* @param \ArrayAccess|array $model |
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* @param array $props |
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* |
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* @throws \InvalidArgumentException |
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* |
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* @return array |
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*/ |
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protected function withProps($model, array $props): array |
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{ |
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if (!(\is_array($model) || $model instanceof \ArrayAccess)) { |
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throw new \InvalidArgumentException('Expect array or object implementing \ArrayAccess'); |
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} |
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// Given an array of props (which may include a definition value), we |
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// cycle through each, resolve the value from the model, and apply any |
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// conversions to the value as necessary. |
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$data = []; |
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foreach ($props as $key => $definition) { |
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if (\is_int($key)) { |
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// This isn't a key => value pair, so there is no definition. |
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$key = $definition; |
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$definition = null; |
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} |
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// Convert property to a snake-case version. |
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// It may be a nested (dot-notation) key. |
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$propKey = StrHelper::snakeCase($key); |
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if ($definition instanceof \Closure) { |
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// If the definition is a function, execute it on the value |
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$value = $definition->bindTo($this)($model, $propKey); |
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} else { |
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// Format the field according to the definition |
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$value = $this->getPropValue($model, $this->parsePropDefinition($propKey, $definition)); |
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} |
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// Set the prop value in the array |
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ArrayHelper::mutate($data, $key, $value); |
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} |
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return $data; |
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} |
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/** |
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* @param \ArrayAccess|array $model |
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* @param PropDefinition $propDefinition |
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* |
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* @throws \InvalidArgumentException |
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* |
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* @return mixed|null |
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*/ |
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protected function getPropValue($model, PropDefinition $propDefinition) |
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{ |
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// Get the model value via array access. |
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$value = $model[$propDefinition->mapKey()] ?? null; |
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// Format the value the property value. |
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$value = $this->formatPropValue($value, $propDefinition); |
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return $value; |
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} |
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/** |
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* @param mixed $value |
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* @param PropDefinition $propDefinition |
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* |
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* @throws \InvalidArgumentException |
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* |
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* @return mixed |
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*/ |
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protected function formatPropValue($value, $propDefinition) |
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{ |
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// There must be a type defined for this property definition. |
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if (!$propDefinition->type()) { |
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return $value; |
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} |
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// Null values are not formatted. |
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if ($value === null) { |
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return $value; |
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} |
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// Built-in types. |
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// Cast the value according to 'type' |
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switch ($propDefinition->type()) { |
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case 'int': |
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case 'integer': |
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return (int) $value; |
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case 'real': |
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case 'float': |
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case 'double': |
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return (float) $value; |
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case 'string': |
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return (string) $value; |
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case 'bool': |
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case 'boolean': |
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return (bool) $value; |
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case 'array': |
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return (array) $value; |
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case 'date': |
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return $this->formatDate($value, $propDefinition); |
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case 'datetime': |
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return $this->formatDatetime($value, $propDefinition); |
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case 'datetime_utc': |
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return $this->formatDatetimeUtc($value, $propDefinition); |
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default: |
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// Fall through |
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break; |
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} |
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// As a final attempt, try to locate a matching method on the class that |
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// is prefixed with 'format'. |
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$method = 'format'.StrHelper::studlyCase($propDefinition->type()); |
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if (method_exists($this, $method)) { |
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return $this->$method($value, $propDefinition); |
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} |
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throw new InvalidDefinitionException("Unsupported format type: {$propDefinition->type()}"); |
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} |
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protected function getDefinitionParser(): DefinitionParser |
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{ |
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if ($this->definitionParser === null) { |
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$this->definitionParser = new DefinitionParser(); |
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$this->definitionParser->addShortKeys('type', [ |
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'int', |
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'integer', |
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'real', |
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'float', |
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'double', |
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'string', |
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'bool', |
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'boolean', |
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'array', |
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'date', |
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'datetime', |
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'datetime_utc', |
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]); |
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} |
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return $this->definitionParser; |
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} |
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/** |
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* @param string $propKey |
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* @param string|mixed $definition |
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* |
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* @throws \Rexlabs\Smokescreen\Exception\ParseDefinitionException |
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* |
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* @return PropDefinition |
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*/ |
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protected function parsePropDefinition(string $propKey, $definition): PropDefinition |
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{ |
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return new PropDefinition($propKey, $this->getDefinitionParser() |
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->parse($definition)); |
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} |
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/** |
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* Given a date object, return a new date object with the specified timezone. |
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* This method ensures that the original date object is not mutated. |
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* |
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* @param DateTimeInterface $date |
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* @param DateTimeZone|string $timezone |
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* |
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* @return DateTimeInterface|DateTime|DateTimeImmutable |
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*/ |
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protected function convertTimeZone(DateTimeInterface $date, $timezone) |
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{ |
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$timezone = ($timezone instanceof DateTimeZone) ? $timezone : new DateTimeZone($timezone); |
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if ($date->getTimezone() !== $timezone) { |
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if ($date instanceof DateTime) { |
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// DateTime is not immutable, so make a copy |
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$date = (clone $date); |
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$date->setTimezone($timezone); |
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} elseif ($date instanceof DateTimeImmutable) { |
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$date = $date->setTimezone($timezone); |
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} |
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} |
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return $date; |
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} |
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/** |
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* Format a date object. |
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* |
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* @param DateTimeInterface $date |
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* @param PropDefinition $definition |
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* |
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* @return string |
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*/ |
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protected function formatDatetime(DateTimeInterface $date, PropDefinition $definition): string |
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{ |
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$timezone = $definition->get('timezone', $this->getDefaultTimezone()); |
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if ($timezone !== null) { |
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$date = $this->convertTimeZone($date, $timezone); |
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} |
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return $date->format($definition->get('format', $this->getDatetimeFormat())); |
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} |
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/** |
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* Shortcut method for converting a date to UTC and returning the formatted string. |
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* |
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* @param DateTimeInterface $date |
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* @param PropDefinition $propDefinition |
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* |
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* @return string |
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* |
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* @see FormatsFields::formatDateTime() |
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*/ |
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protected function formatDatetimeUtc(DateTimeInterface $date, PropDefinition $propDefinition): string |
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{ |
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return $this->formatDatetime($date, $propDefinition->set('timezone', 'UTC')); |
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} |
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/** |
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* @param DateTimeInterface $date |
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* @param PropDefinition $propDefinition |
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* |
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* @return string |
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*/ |
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protected function formatDate(DateTimeInterface $date, PropDefinition $propDefinition): string |
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{ |
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if (!$propDefinition->has('format')) { |
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$propDefinition->set('format', $this->getDateFormat()); |
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} |
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return $this->formatDatetime($date, $propDefinition); |
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} |
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} |
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