70 lines
2.3 KiB
PHP
70 lines
2.3 KiB
PHP
<?php
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/**
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* Feed retrieval, parsing, and manipulation
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*/
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class Feed {
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/**
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* Parse a feed into an XML tree
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* @param string $content The feed's RSS content
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* @return array|SimpleXMLElement[]|string[] [ 'ok' => feed ] if successful, [ 'error' => message] if not
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*/
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public static function parseFeed(string $content): array {
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try {
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return [ 'ok' => new SimpleXMLElement($content) ];
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} catch (Exception $ex) {
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return [ 'error' => $ex->getMessage() ];
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}
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}
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/**
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* Retrieve the feed
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* @param string $url
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* @return array|SimpleXMLElement[]|string[] [ 'ok' => feedXml, 'url' => actualUrl ] if successful, [ 'error' => message ] if not
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*/
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public static function retrieveFeed(string $url): array {
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$feedReq = curl_init($url);
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curl_setopt($feedReq, CURLOPT_FOLLOWLOCATION, true);
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curl_setopt($feedReq, CURLOPT_RETURNTRANSFER, true);
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curl_setopt($feedReq, CURLOPT_CONNECTTIMEOUT, 5);
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curl_setopt($feedReq, CURLOPT_TIMEOUT, 15);
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$feedContent = curl_exec($feedReq);
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$result = array();
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$error = curl_error($feedReq);
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$code = curl_getinfo($feedReq, CURLINFO_RESPONSE_CODE);
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if ($error) {
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$result['error'] = $error;
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} else if ($code == 200) {
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$parsed = self::parseFeed($feedContent);
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if (array_key_exists('error', $parsed)) {
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$result['error'] = $parsed['error'];
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} else {
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$result['ok'] = $parsed['ok'];
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$result['url'] = curl_getinfo($feedReq, CURLINFO_EFFECTIVE_URL);
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}
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} else {
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$result['error'] = "HTTP Code $code: $feedContent";
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}
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curl_close($feedReq);
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return $result;
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}
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/**
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* Add an RSS feed
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* @param string $url The URL of the RSS feed to add
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* @return array [ 'ok' => true ] if successful, [ 'error' => message ] if not
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*/
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public static function add(string $url): array {
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$feed = self::retrieveFeed($url);
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if (array_key_exists('error', $feed)) return $feed;
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$channel = $feed['ok']->channel;
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$feedId = Data::addFeed($feed['url'], (string) $channel->title, (string) $channel->lastBuildDate);
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return [ 'ok' => true ];
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}
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}
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