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<?php |
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/** |
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* Copyright (c) 2017 Ryan Parman <http://ryanparman.com>. |
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* Copyright (c) 2017 Contributors. |
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* |
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* http://opensource.org/licenses/Apache2.0 |
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*/ |
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declare(strict_types=1); |
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namespace SimplePie\Type; |
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use DateTime; |
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use DateTimeZone; |
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use Psr\Log\NullLogger; |
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use SimplePie\Configuration as C; |
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use SimplePie\Exception\SimplePieException; |
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use SimplePie\Mixin\LoggerTrait; |
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use SimplePie\Parser\Date as DateParser; |
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use stdClass; |
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/** |
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* Represents the top-level of a feed. |
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*/ |
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class Feed extends AbstractType implements TypeInterface, C\SetLoggerInterface |
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{ |
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use LoggerTrait; |
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/** |
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* The root-most node in the feed. |
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* |
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* @var stdClass |
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*/ |
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protected $root; |
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/** |
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* The preferred namespace alias for a given XML namespace URI. Should be |
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* the result of a call to `SimplePie\Util\Ns`. |
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* |
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* @var string |
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*/ |
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protected $namespaceAlias; |
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/** |
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* The format that should be used when determining how to parse a date from a date string. |
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* |
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* @var string |
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*/ |
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protected $createFromFormat; |
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/** |
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* The preferred timezone to use for date output. |
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* |
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* @var string |
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*/ |
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protected $outputTimezone; |
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/** |
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* Constructs a new instance of this class. |
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* |
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* @param string $namespaceAlias [description] |
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*/ |
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public function __construct(string $namespaceAlias) |
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{ |
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$this->root = new stdClass(); |
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$this->logger = new NullLogger(); |
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$this->namespaceAlias = $namespaceAlias; |
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} |
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/** |
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* Allows the user to help the date parser by providing the format of the datestamp in the feed. |
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* |
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* This will be passed into `DateTime::createFromFormat()` at parse-time. |
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* |
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* @param string $createFromFormat The format of the datestamp in the feed. |
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* |
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* @return self |
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* |
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* @see http://php.net/manual/en/datetime.createfromformat.php |
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*/ |
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public function setDateFormat(string $createFromFormat): self |
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{ |
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$this->createFromFormat = $createFromFormat; |
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return $this; |
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} |
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/** |
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* Set the preferred output timezone. |
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* |
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* This calculation is performed on a _best-effort_ basis and is not guaranteed. Factors which may affect the |
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* calculation include: |
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* |
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* * the version of glibc/musl that your OS relies on |
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* * the freshness of the timestamp data your OS relies on |
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* * the format of the datestamp inside of the feed and PHP's ability to parse it |
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* |
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* @param string $timezone The timezone identifier to use. Must be compatible with `DateTimeZone`. The default |
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* value is `UTC`. |
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* |
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* @return self |
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*/ |
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public function setOutputTimezone(string $timezone = 'UTC'): self |
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{ |
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$this->outputTimezone = $timezone; |
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return $this; |
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} |
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/** |
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* Retrieves nodes that are simple scalars, and there are only one allowed value. |
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* |
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* @param string $nodeName The name of the tree node to retrieve. Available tree nodes can be viewed by |
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* looking at the response from `getRoot()`. |
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* @param string|null $namespaceAlias The XML namespace alias to apply. |
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* |
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* @return Node |
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*/ |
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public function getScalarSingleValue(string $nodeName, ?string $namespaceAlias = null): Node |
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{ |
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$alias = $namespaceAlias ?? $this->namespaceAlias; |
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if (isset($this->getRoot()->{$nodeName}[$alias])) { |
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return $this->getRoot()->{$nodeName}[$alias]; |
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} |
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return new Node(); |
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} |
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//-------------------------------------------------------------------------- |
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// SINGLE COMPLEX VALUES |
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public function getGenerator(?string $namespaceAlias = null): Generator |
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{ |
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$alias = $namespaceAlias ?? $this->namespaceAlias; |
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if (isset($this->getRoot()->generator[$alias])) { |
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return $this->getRoot()->generator[$alias]; |
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} |
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return new Generator(); |
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} |
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public function getAuthor(?string $namespaceAlias = null): Person |
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{ |
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$alias = $namespaceAlias ?? $this->namespaceAlias; |
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if (isset($this->getRoot()->author[$alias])) { |
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return $this->getRoot()->author[$alias]; |
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} |
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return new Person(); |
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} |
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//-------------------------------------------------------------------------- |
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// MULTIPLE COMPLEX VALUES |
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public function getContributors(?string $namespaceAlias = null): iterable |
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{ |
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$alias = $namespaceAlias ?? $this->namespaceAlias; |
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if (isset($this->getRoot()->contributor[$alias])) { |
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return $this->getRoot()->contributor[$alias]; |
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} |
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return []; |
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} |
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public function getLinks(?string $namespaceAlias = null): iterable |
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{ |
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$alias = $namespaceAlias ?? $this->namespaceAlias; |
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if (isset($this->getRoot()->link[$alias])) { |
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return $this->getRoot()->link[$alias]; |
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} |
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return []; |
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} |
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public function getItems(): void |
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{ |
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} |
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//-------------------------------------------------------------------------- |
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// INTERNAL |
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/** |
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* Retrieve the root-most node in the feed. |
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* |
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* @return stdClass |
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*/ |
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public function getRoot(): stdClass |
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{ |
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return $this->root; |
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} |
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/** |
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* Finds the common internal alias for a given method name. |
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* |
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* @param string $nodeName The name of the method being called. |
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* |
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* @return string |
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*/ |
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protected function getAlias(string $nodeName): string |
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{ |
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switch ($nodeName) { |
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case 'language': |
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return 'lang'; |
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case 'pubDate': |
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case 'publishedDate': |
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return 'published'; |
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default: |
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return $nodeName; |
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} |
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} |
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/** |
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* Get the correct handler for a whitelisted method name. |
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* |
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* @param string $nodeName The name of the method being called. |
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* @param array $args Any arguments passed into that method. |
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* |
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* @throws SimplePieException |
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* |
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* @return mixed |
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*/ |
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protected function getHandler(string $nodeName, array $args) |
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{ |
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switch ($nodeName) { |
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case 'id': |
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case 'lang': |
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case 'rights': |
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case 'subtitle': |
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case 'summary': |
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case 'title': |
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return $this->getScalarSingleValue($nodeName, $args[0]); |
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case 'published': |
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case 'updated': |
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return (new DateParser( |
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$this->getScalarSingleValue($nodeName, $args[0])->getValue(), |
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$this->outputTimezone, |
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$this->createFromFormat |
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))->getDateTime(); |
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default: |
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throw new SimplePieException( |
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\sprintf('%s is an unresolvable method.') |
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); |
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} |
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} |
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} |
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