39 lines
1 KiB
TypeScript
39 lines
1 KiB
TypeScript
import { TarFile } from 'js-untar';
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import ListWalker from 'Player/common/ListWalker';
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interface Snapshots {
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[timestamp: number]: TarFile
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}
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type Timestamp = { time: number }
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export default class SnapshotManager extends ListWalker<Timestamp> {
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private snapshots: Snapshots = {};
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public mapToSnapshots(files: TarFile[]) {
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const filenameRegexp = /(\d+)_1_(\d+)\.(jpeg|png|avif|webp)$/;
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const firstPair = files[0].name.match(filenameRegexp);
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const sessionStart = firstPair ? parseInt(firstPair[1], 10) : 0;
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files.forEach((file) => {
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const [_, _2, imageTimestamp] = file
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.name
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.match(filenameRegexp)
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?.map((n) => parseInt(n, 10)) ?? [0, 0, 0];
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const messageTime = imageTimestamp - sessionStart;
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this.snapshots[messageTime] = file;
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this.append({ time: messageTime });
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});
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}
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public moveReady(t: number) {
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const msg = this.moveGetLast(t);
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if (msg) {
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return this.snapshots[msg.time];
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}
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}
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public clean() {
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this.snapshots = {};
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this.reset();
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}
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}
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