Function actsFromHeuristic

e2e/scripts/film.ts:96–126

()

/** Fallback for runs without a timeline: one browser hop located by the
 *  narrator line, or the largest output gap in the cast. */
const actsFromHeuristic = (): Act[] => {
  const findHop = (): { start: number; end: number } => {
    const markerIndex = events.findIndex((event) => event.text.includes("in the browser"));
    if (markerIndex !== -1) {
      const start = events[markerIndex];
      const after = events
        .slice(markerIndex + 1)
        .find((event) => event.at > (start?.at ?? 0) + 1 && event.text.trim().length > 0);
      if (start && after) return { start: start.at + 0.8, end: after.at };
    }
    let best = { start: 0, end: 0 };
    for (let i = 1; i < events.length; i += 1) {
      const previous = events[i - 1];
      const current = events[i];
      if (previous && current && current.at - previous.at > best.end - best.start) {
        best = { start: previous.at, end: current.at };
      }
    }
    return best;
  };
  const hop = findHop();
  if (hop.end - hop.start < 2) {
    console.error(`film: no browser hop found in the cast (gap ${hop.end - hop.start}s)`);
    process.exit(1);
  }
  return [
    { source: "terminal", from: 0, to: hop.start },
    { source: "browser", from: 0, to: probeSeconds(browserPath) },
    { source: "terminal", from: hop.end, to: castEnd },
  ];
};

const acts = actsFromTimeline() ?? actsFromHeuristic();