39 lines
1.3 KiB
TypeScript
39 lines
1.3 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]); j++
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}
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const text = payload.join('\n').replace(/<[^>]+>/g, '').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); 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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