110 lines
3.0 KiB
PHP
110 lines
3.0 KiB
PHP
<?php
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declare(strict_types=1);
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/**
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* Generates and renders a breadcrumb based on the current url segments
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*
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* @copyright 2022 Ad Aures
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* @license https://www.gnu.org/licenses/agpl-3.0.en.html AGPL3
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* @link https://castopod.org/
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*/
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namespace Modules\Media;
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use stdClass;
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class TranscriptParser
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{
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protected string $transcriptContent;
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public function loadString(string $content): self
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{
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$this->transcriptContent = $content;
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return $this;
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}
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/**
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* Adapted from: https://stackoverflow.com/a/11659306
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*/
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public function parseSrt(): string | false
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{
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if (! defined('SRT_STATE_SUBNUMBER')) {
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define('SRT_STATE_SUBNUMBER', 0);
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}
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if (! defined('SRT_STATE_TIME')) {
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define('SRT_STATE_TIME', 1);
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}
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if (! defined('SRT_STATE_TEXT')) {
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define('SRT_STATE_TEXT', 2);
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}
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if (! defined('SRT_STATE_BLANK')) {
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define('SRT_STATE_BLANK', 3);
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}
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$subs = [];
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$state = SRT_STATE_SUBNUMBER;
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$subNum = 0;
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$subText = '';
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$subTime = '';
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$lines = explode(PHP_EOL, $this->transcriptContent);
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foreach ($lines as $line) {
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switch ($state) {
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case SRT_STATE_SUBNUMBER:
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$subNum = trim($line);
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$state = SRT_STATE_TIME;
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break;
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case SRT_STATE_TIME:
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$subTime = trim($line);
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$state = SRT_STATE_TEXT;
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break;
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case SRT_STATE_TEXT:
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if (trim($line) === '') {
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$sub = new stdClass();
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$sub->number = (int) $subNum;
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[$startTime, $endTime] = explode(' --> ', $subTime);
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$sub->startTime = $this->getSecondsFromTimeString($startTime);
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$sub->endTime = $this->getSecondsFromTimeString($endTime);
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$sub->text = trim($subText);
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$subText = '';
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$state = SRT_STATE_SUBNUMBER;
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$subs[] = $sub;
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} else {
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if ($subText !== '') {
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$subText .= PHP_EOL . $line;
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}
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$subText .= $line;
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}
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break;
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}
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}
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if ($state === SRT_STATE_TEXT) {
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// if file was missing the trailing newlines, we'll be in this
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// state here. Append the last read text and add the last sub.
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// @phpstan-ignore-next-line
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$sub->text = $subText;
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// @phpstan-ignore-next-line
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$subs[] = $sub;
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}
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return json_encode($subs, JSON_PRETTY_PRINT);
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}
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private function getSecondsFromTimeString(string $timeString): float
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{
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$timeString = explode(',', $timeString);
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return (strtotime($timeString[0]) - strtotime('TODAY')) + (float) "0.{$timeString[1]}";
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}
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}
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