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style: format static/player/subtitles/vtt.ts

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mkelvers
2026-06-21 02:04:55 +02:00
committed by Milas Holsting
parent ce3571c88b
commit cffaa143a9
1 changed files with 28 additions and 14 deletions
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42
static/player/subtitles/vtt.ts
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@@ -1,17 +1,23 @@
// parses VTT timestamp (mm:ss.ms or hh:mm:ss.ms) to seconds // parses VTT timestamp (mm:ss.ms or hh:mm:ss.ms) to seconds
export const parseVttTime = (raw: string): number => { export const parseVttTime = (raw: string): number => {
const parts = raw.trim().split(":"); const parts = raw.trim().split(":");
if (parts.length < 2) return 0; if (parts.length < 2) {
const secPart = parts[parts.length - 1]; return 0;
const minPart = parts[parts.length - 2]; }
const hourPart = parts.length > 2 ? parts[parts.length - 3] : "0"; const secPart = parts.at(-1);
if (!secPart || !minPart) return 0; const minPart = parts.at(-2);
const hourPart = parts.length > 2 ? parts.at(-3) : "0";
if (!secPart || !minPart) {
return 0;
}
return Number(hourPart) * 3600 + Number(minPart) * 60 + Number(secPart.replace(",", ".")); return Number(hourPart) * 3600 + Number(minPart) * 60 + Number(secPart.replace(",", "."));
}; };
// parses a single VTT cue: timestamp line + text lines // parses a single VTT cue: timestamp line + text lines
const parseVttCue = (line: string, lines: string[], i: number) => { const parseVttCue = (line: string, lines: string[], i: number) => {
if (!line.includes("-->")) return null; if (!line.includes("-->")) {
return null;
}
const [startRaw, endRaw] = line.split("-->"); const [startRaw, endRaw] = line.split("-->");
const payload: string[] = []; const payload: string[] = [];
let j = i + 1; let j = i + 1;
@@ -23,31 +29,39 @@ const parseVttCue = (line: string, lines: string[], i: number) => {
// strip tags, join lines // strip tags, join lines
const text = payload const text = payload
.join("\n") .join("\n")
.replace(/<[^>]+>/g, "") .replaceAll(/<[^>]+>/g, "")
.trim(); .trim();
if (!text) return null; if (!text) {
return null;
}
return { start: parseVttTime(startRaw), end: parseVttTime(endRaw), text }; return { start: parseVttTime(startRaw), end: parseVttTime(endRaw), text };
}; };
/** /**
* Parses full VTT file into cue array. * Parses full VTT file into cue array. Handles both compact (timestamp on separate line) and
* Handles both compact (timestamp on separate line) and standard formats. * standard formats.
*/ */
export const parseVtt = (text: string) => { export const parseVtt = (text: string) => {
const lines = text.replace(/\r/g, "").split("\n"); const lines = text.replaceAll(/\r/g, "").split("\n");
const cues = []; const cues = [];
for (let i = 0; i < lines.length; i++) { for (let i = 0; i < lines.length; i++) {
const line = lines[i].trim(); const line = lines[i].trim();
if (!line) continue; if (!line) {
continue;
}
// compact: cue id on line i, timestamp on i+1 // compact: cue id on line i, timestamp on i+1
if (i + 1 < lines.length && !line.includes("-->") && lines[i + 1].includes("-->")) { if (i + 1 < lines.length && !line.includes("-->") && lines[i + 1].includes("-->")) {
const cue = parseVttCue(lines[i + 1].trim(), lines, i + 1); const cue = parseVttCue(lines[i + 1].trim(), lines, i + 1);
if (cue) cues.push(cue); if (cue) {
cues.push(cue);
}
i++; i++;
} else if (line.includes("-->")) { } else if (line.includes("-->")) {
// standard: timestamp on same line // standard: timestamp on same line
const cue = parseVttCue(line, lines, i); const cue = parseVttCue(line, lines, i);
if (cue) cues.push(cue); if (cue) {
cues.push(cue);
}
} }
} }
return cues; return cues;