28 lines
757 B
TypeScript
28 lines
757 B
TypeScript
import type { Message } from './message'
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import type { RawMessage } from './raw'
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import RawMessageReader from './RawMessageReader'
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interface RawMessageReaderI {
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readMessage(): RawMessage | null
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}
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export default class MStreamReader {
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constructor(private readonly r: RawMessageReaderI = new RawMessageReader(), private startTs: number = 0){}
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private t: number = 0
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private idx: number = 0
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readNext(): Message | null {
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let msg = this.r.readMessage()
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if (msg === null) { return null }
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if (msg.tp === "timestamp") {
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this.startTs = this.startTs || msg.timestamp
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this.t = msg.timestamp - this.startTs
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return this.readNext()
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}
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return Object.assign(msg, {
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time: this.t,
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_index: this.idx++,
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})
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}
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}
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