59 lines
1.8 KiB
TypeScript
59 lines
1.8 KiB
TypeScript
import { state } from '../state';
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// filter bounds for valid segments
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const MIN_SEGMENT_DURATION = 20; // at least 20s
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const MAX_SEGMENT_DURATION = 240; // at most 4 min
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const MAX_INTRO_START = 180; // intro must start before 3min
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const MIN_OUTRO_START_RATIO = 0.5; // outro must start at least 50% in
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/**
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* Filters parsed segments to only those within video bounds and sensible duration.
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* Validates intro/outro positioning.
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*/
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export const resolveActiveSegments = (): void => {
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const bounds = state.video.duration;
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if (bounds <= 0) {
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state.activeSegments = [];
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return;
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}
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state.activeSegments = state.parsedSegments.filter(s => {
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const len = s.end - s.start;
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// duration filter
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if (len < MIN_SEGMENT_DURATION || len > MAX_SEGMENT_DURATION) return false;
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// bounds check
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if (s.start < 0 || s.end <= s.start || s.end > bounds + 1) return false;
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// intro: starts early, before 50% of video
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if (s.type === 'op') {
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return s.start <= MAX_INTRO_START && s.start <= bounds * 0.5;
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}
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// outro: starts in second half of video
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if (s.type === 'ed') {
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return s.start >= bounds * MIN_OUTRO_START_RATIO;
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}
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return false;
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});
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};
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/**
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* Renders segment markers on the timeline progress bar.
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*/
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export const renderSegments = (): void => {
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const track = state.container.querySelector('[data-segments]') as HTMLElement | null;
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if (!track) return;
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track.innerHTML = '';
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const bounds = state.video.duration;
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if (bounds <= 0) return;
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// create small white bars for each segment
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state.activeSegments.forEach(s => {
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const bar = document.createElement('div');
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bar.className = 'absolute top-0 h-full bg-white/80';
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bar.style.left = `${(s.start / bounds) * 100}%`;
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bar.style.width = `${((s.end - s.start) / bounds) * 100}%`;
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track.appendChild(bar);
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});
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};
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