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<?php |
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/* |
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* This file is part of the feed-io package. |
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* |
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* (c) Alexandre Debril <[email protected]> |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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*/ |
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namespace FeedIo; |
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use FeedIo\ParserAbstract; |
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use FeedIo\Adapter\ClientInterface; |
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use FeedIo\Adapter\ResponseInterface; |
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use FeedIo\Reader\Document; |
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use FeedIo\Reader\ReadErrorException; |
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use FeedIo\Reader\Result; |
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use FeedIo\Reader\NoAccurateParserException; |
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use Psr\Log\LoggerInterface; |
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/** |
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* Consumes feeds and return corresponding Result instances |
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* |
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* Depends on : |
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* - FeedIo\Adapter\ClientInterface |
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* - Psr\Log\LoggerInterface |
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* |
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* A Reader instance MUST have at least one parser added with the addParser() method to read feeds |
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* It will throw a NoAccurateParserException if it cannot find a suitable parser for the feed. |
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*/ |
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class Reader |
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{ |
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/** |
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* @var \FeedIo\Adapter\ClientInterface; |
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*/ |
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protected $client; |
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/** |
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* @var \Psr\Log\LoggerInterface |
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*/ |
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protected $logger; |
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/** |
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* @var array |
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*/ |
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protected $parsers = array(); |
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/** |
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* @param ClientInterface $client |
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* @param LoggerInterface $logger |
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*/ |
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public function __construct(ClientInterface $client, LoggerInterface $logger) |
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{ |
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$this->client = $client; |
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$this->logger = $logger; |
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} |
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/** |
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* @param Parser $parser |
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* @return $this |
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*/ |
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public function addParser(ParserAbstract $parser) |
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{ |
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$this->logger->debug("new parser added : ".get_class($parser->getStandard())); |
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$this->parsers[] = $parser; |
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return $this; |
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} |
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/** |
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* adds a filter to every parsers |
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* |
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* @param \FeedIo\FilterInterface $filter |
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* @return $this |
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*/ |
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public function addFilter(FilterInterface $filter) |
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{ |
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foreach ($this->parsers as $parser) { |
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$parser->addFilter($filter); |
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} |
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return $this; |
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} |
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/** |
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* Reset filters on every parsers |
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* @return $this |
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*/ |
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public function resetFilters() |
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{ |
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foreach ($this->parsers as $parser) { |
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$parser->resetFilters(); |
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} |
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return $this; |
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} |
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/** |
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* @param $url |
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* @param FeedInterface $feed |
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* @param \DateTime $modifiedSince |
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* @return \FeedIo\Reader\Result |
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* @throws ReadErrorException |
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*/ |
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public function read($url, FeedInterface $feed, \DateTime $modifiedSince = null) |
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{ |
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$this->logger->debug("start reading {$url}"); |
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if (is_null($modifiedSince)) { |
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$this->logger->notice("no 'modifiedSince' parameter given, setting it to 01/01/1970"); |
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$modifiedSince = new \DateTime('@0'); |
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} |
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try { |
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$this->logger->info("hitting {$url}"); |
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$response = $this->client->getResponse($url, $modifiedSince); |
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$document = $this->handleResponse($response, $feed); |
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return new Result($document, $feed, $modifiedSince, $response, $url); |
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} catch (\Exception $e) { |
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$this->logger->warning("{$url} read error : {$e->getMessage()}"); |
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throw new ReadErrorException($e); |
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} |
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} |
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/** |
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* @param ResponseInterface $response |
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* @param FeedInterface $feed |
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* @return Document |
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*/ |
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public function handleResponse(ResponseInterface $response, FeedInterface $feed) |
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{ |
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$this->logger->debug("response ok, now turning it into a document"); |
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$document = new Document($response->getBody()); |
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if ($response->isModified()) { |
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$this->logger->info("the stream is modified, parsing it"); |
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$this->parseDocument($document, $feed); |
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} |
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return $document; |
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} |
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/** |
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* @param Document $document |
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* @param FeedInterface $feed |
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* @return FeedInterface |
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* @throws Parser\UnsupportedFormatException |
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* @throws Reader\NoAccurateParserException |
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*/ |
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public function parseDocument(Document $document, FeedInterface $feed) |
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{ |
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$parser = $this->getAccurateParser($document); |
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$this->logger->debug("accurate parser : ".get_class($parser)); |
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return $parser->parse($document, $feed); |
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} |
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/** |
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* @param Document $document |
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* @return ParserAbstract |
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* @throws Reader\NoAccurateParserException |
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*/ |
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public function getAccurateParser(Document $document) |
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{ |
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foreach ($this->parsers as $parser) { |
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if ($parser->getStandard()->canHandle($document)) { |
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return $parser; |
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} |
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} |
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$message = 'No parser can handle this stream'; |
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$this->logger->error($message); |
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throw new NoAccurateParserException($message); |
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} |
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} |
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alexdebril /
feed-io
