38 lines
958 B
TypeScript
38 lines
958 B
TypeScript
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import { TextLineStream } from "jsr:@std/streams@1/text-line-stream";
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import { ExportEntry } from "./directory-tailer.ts";
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import { tailer } from "./main.ts";
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export const catchUp = async () => {
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using exports = await Deno.open("./data/exports.jsonl", { read: true });
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await exports.seek(-4096, Deno.SeekMode.End); // grab last 4kib
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const lineStream = exports.readable
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.pipeThrough(new TextDecoderStream())
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.pipeThrough(new TextLineStream());
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// discard one partial line
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{
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const lineReader = lineStream.getReader();
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const _line = await lineReader.read();
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lineReader.releaseLock();
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}
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let lastLine: string | undefined;
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for await (const line of lineStream.values()) {
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lastLine = line;
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}
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if (lastLine) {
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const entry = JSON.parse(lastLine) as unknown as ExportEntry;
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tailer.latestDate = entry.createdAt;
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}
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};
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try {
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await catchUp();
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} catch (err) {
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console.warn(err);
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}
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await tailer.fetchExports();
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