44 lines
1.4 KiB
TypeScript
44 lines
1.4 KiB
TypeScript
export const parseVttTime = (raw: string): number => {
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const parts = raw.trim().split(':');
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if (parts.length < 2) return 0;
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const secPart = parts.pop()!;
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const minPart = parts.pop()!;
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const hourPart = parts.pop() ?? '0';
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return Number(hourPart) * 3600 + Number(minPart) * 60 + Number(secPart.replace(',', '.'));
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};
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export const parseVttCue = (line: string, lines: string[], i: number) => {
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if (!line.includes('-->')) return null;
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const [startRaw, endRaw] = line.split('-->');
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const payload: string[] = [];
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let j = i + 1;
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while (j < lines.length && lines[j].trim() !== '') {
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payload.push(lines[j]);
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j++;
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}
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const text = payload
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.join('\n')
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.replace(/<[^>]+>/g, '')
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.trim();
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if (!text) return null;
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return { start: parseVttTime(startRaw), end: parseVttTime(endRaw), text };
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};
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export const parseVtt = (text: string) => {
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const lines = text.replace(/\r/g, '').split('\n');
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const cues = [];
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for (let i = 0; i < lines.length; i++) {
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const line = lines[i].trim();
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if (!line) continue;
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if (i + 1 < lines.length && !line.includes('-->') && lines[i + 1].includes('-->')) {
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const cue = parseVttCue(lines[i + 1].trim(), lines, i + 1);
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if (cue) cues.push(cue);
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i++;
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} else if (line.includes('-->')) {
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const cue = parseVttCue(line, lines, i);
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if (cue) cues.push(cue);
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}
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}
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return cues;
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};
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