112 lines
3.2 KiB
PHP
112 lines
3.2 KiB
PHP
<?php
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namespace BassDrive;
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/**
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* BassDrive Archive Parser class
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* @author Markus Birth <markus@birth-online.de>
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*/
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class BDAParser
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{
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const RFC_822 = 'D, d M Y H:i:s T';
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public function __construct($show_dir, $archive_url, $mp3_bitrate = 128)
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{
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$this->show_dir = $show_dir;
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$this->archive_url = $archive_url;
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$this->mp3_bitrate = $mp3_bitrate;
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$this->cachefile = $show_dir . 'filesize.cache';
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$this->initCache();
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}
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private function initCache()
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{
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$this->len_cache = array();
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$this->cache_dirty = false;
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if (file_exists($this->cachefile)) {
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$this->len_cache = json_decode(file_get_contents($this->cachefile), true);
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}
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}
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public function __destruct()
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{
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// Flush filesize cache if needed
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if ($this->cache_dirty) {
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file_put_contents($this->cachefile, json_encode($this->len_cache, JSON_PRETTY_PRINT), LOCK_EX);
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}
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}
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public function fetchFiles()
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{
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$src_data = file_get_contents($this->archive_url);
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$dom = new \DOMDocument();
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$dom->loadHTML($src_data);
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$anchors = $dom->getElementsByTagName('a');
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$file_list = array();
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foreach ($anchors as $anchor) {
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$title = $anchor->nodeValue;
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$href = $anchor->attributes->getNamedItem('href')->nodeValue;
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if (substr($href, -4) !== '.mp3') {
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continue;
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}
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$title = urldecode(substr($href, 0, -4)); // strip off ".mp3" file extension
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$url = $this->archive_url . $href;
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$size = $this->getSize($url);
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array_push($file_list, array(
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'url' => $url,
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'title' => trim($title),
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'size' => $size,
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'duration' => $this->getDuration($size),
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'date' => $this->getDateFromTitle(trim($title)),
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));
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}
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return $file_list;
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}
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public function getSize($url)
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{
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if (isset($this->len_cache[$url])) {
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return $this->len_cache[$url];
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}
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$context = stream_context_set_default(array(
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'http' => array(
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'method' => 'HEAD',
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),
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));
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$headers = get_headers($url, 1);
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$length = intval($headers['Content-Length']);
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$this->len_cache[$url] = $length;
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$this->cache_dirty = true;
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return $length;
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}
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public function getDuration($size)
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{
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// 70445111 Bytes = 01:13:22.80 = 73:22.80 = 4402.80 seconds (128 kb/s)
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// 147530737 Bytes = 02:33:40.64 = 153:40.64 = 9220.64 seconds (128 kb/s)
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$bitrate = intval($this->mp3_bitrate) * 1000;
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$seconds = $size / ($bitrate / 8);
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$hours = intdiv($seconds, 3600);
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$seconds = $seconds % 3600;
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$minutes = intdiv($seconds, 60);
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$seconds = $seconds % 60;
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return sprintf('%02d:%02d:%02d', $hours, $minutes, $seconds);
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}
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public function getDateFromTitle($title)
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{
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$datestr = substr($title, 1, 10);
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$iso_date = substr($datestr, 0, 4) . '-' . substr($datestr, 5, 2) . '-' . substr($datestr, 8, 2);
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return $iso_date;
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}
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}
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