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<?php |
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namespace Chrisyue\PhpM3u8\Parser; |
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use Chrisyue\PhpM3u8\Model\Mapping\TagMetadata; |
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use Chrisyue\PhpM3u8\Model\MasterPlaylist; |
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use Chrisyue\PhpM3u8\Model\MediaPlaylist; |
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class PlaylistBuilder |
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{ |
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private $factory; |
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public function __construct(PlaylistComponentFactory $factory) |
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{ |
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$this->factory = $factory; |
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} |
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public function initPlaylist() |
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{ |
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$this->playlist = $this->factory->createPlaylistBuffer(); |
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} |
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public function addPlaylistTag(TagMetadata $metadata, $value) |
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{ |
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$this->ensurePlaylistType($metadata->getProperty()->getDeclaringClass()->getName()); |
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$this->callComponentSetter($this->playlist, $metadata, $value); |
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} |
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public function addMediaSegmentTag(TagMetadata $metadata, $value) |
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{ |
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$this->ensurePlaylistType(MediaPlaylist::class); |
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$segment = end($this->playlist->segments); |
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if (!$segment || null !== $segment->uri) { |
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$segment = $this->factory->createSegment(); |
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$this->playlist->segments->append($segment); |
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} |
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$this->callComponentSetter($segment, $metadata, $value); |
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} |
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public function addUri($uri) |
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{ |
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if ($this->playlist instanceof PlaylistCopyableInterface) { |
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throw new \RuntimeException('Adding URI to unknown playlist type'); |
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} |
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$property = $this->playlist instanceof MasterPlaylist ? 'streamInfs' : 'segments'; |
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$component = end($this->playlist->$property); |
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if (!$component || null !== $component->uri) { |
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throw new \RuntimeException(); |
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} |
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$component->uri = $uri; |
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} |
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public function getResult() |
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{ |
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return $this->playlist; |
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} |
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private function callComponentSetter($component, TagMetadata $metadata, $value) |
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{ |
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$property = $metadata->getProperty(); |
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$property->setAccessible(true); |
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if ($metadata->isMultiple()) { |
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return $property->getValue($component)->append($value); |
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} |
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$property->setValue($component, $value); |
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} |
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private function ensurePlaylistType($type) |
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{ |
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if ($this->playlist instanceof $type) { |
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return; |
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} |
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if (!$this->playlist instanceof PlaylistCopyableInterface) { |
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throw new \RuntimeException('Different kinds of playlist tag in a same m3u8 content'); |
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} |
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$playlist = $type === MediaPlaylist::class ? $this->factory->createMediaPlaylist() : $this->factory->createMasterPlaylist(); |
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$this->playlist->copyToPlaylist($playlist); |
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$this->playlist = $playlist; |
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} |
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} |
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chrisyue /
php-m3u8
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In PHP it is possible to write to properties without declaring them. For example, the following is perfectly valid PHP code:
Generally, it is a good practice to explictly declare properties to avoid accidental typos and provide IDE auto-completion: