72 lines
2.0 KiB
TypeScript
72 lines
2.0 KiB
TypeScript
import { Client } from "https://deno.land/x/postgres@v0.19.3/mod.ts";
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import { getLatestVideos } from "lib/net/getLatestVideos.ts";
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import { getLatestVideoTimestampFromAllData, insertIntoAllData, videoExistsInAllData } from "lib/db/allData.ts";
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import { sleep } from "lib/utils/sleep.ts";
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import { bisectVideoPageInNewList } from "lib/net/bisectVideoStartFrom.ts";
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export async function insertLatestVideos(
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client: Client,
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pageSize: number = 10,
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sleepRate: number = 250,
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intervalRate: number = 4000,
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): Promise<number | null> {
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const latestVideoTimestamp = await getLatestVideoTimestampFromAllData(client);
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if (latestVideoTimestamp == null) {
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console.error("Cannot get latest video timestamp from current database.");
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return null
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}
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const videoIndex = await bisectVideoPageInNewList(latestVideoTimestamp);
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if (videoIndex == null) {
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console.error("Cannot locate the video through bisect.");
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return null
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}
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let page = Math.floor(videoIndex / pageSize) + 1;
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let failCount = 0;
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while (true) {
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try {
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const videos = await getLatestVideos(page, pageSize, sleepRate);
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if (videos == null) {
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failCount++;
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if (failCount > 5) {
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return null;
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}
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continue;
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}
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if (videos.length == 0) {
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console.warn("No more videos found");
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break;
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}
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let allNotExists = true;
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for (const video of videos) {
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const videoExists = await videoExistsInAllData(client, video.aid);
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if (videoExists) {
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allNotExists = false;
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}
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else {
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insertIntoAllData(client, video);
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}
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}
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if (allNotExists) {
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page++;
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console.warn(`All video not exist in the database, going back to older page.`);
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continue;
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}
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console.log(`Page ${page} crawled, total: ${(page - 1) * 20 + videos.length} videos.`);
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page--;
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if (page == 0) {
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return 0;
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}
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} catch (error) {
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console.error(error);
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failCount++;
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if (failCount > 5) {
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return null;
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}
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continue;
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} finally {
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await sleep(Math.random() * intervalRate + 1000);
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}
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}
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return 0;
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}
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