api/src/processing/services/ok.js

import { genericUserAgent, env } from "../../config.js";
import { cleanString } from "../../misc/utils.js";

const resolutions = {
    "ultra": "2160",
    "quad": "1440",
    "full": "1080",
    "hd": "720",
    "sd": "480",
    "low": "360",
    "lowest": "240",
    "mobile": "144"
}

export default async function(o) {
    let quality = o.quality === "max" ? "2160" : o.quality;

    let html = await fetch(`https://ok.ru/video/${o.id}`, {
        headers: { "user-agent": genericUserAgent }
    }).then(r => r.text()).catch(() => {});

    if (!html) return { error: "fetch.fail" };

    let videoData = html.match(/<div data-module="OKVideo" .*? data-options="({.*?})"( .*?)>/)
                        ?.[1]
                        ?.replaceAll("&quot;", '"');

    if (!videoData) {
        return { error: "fetch.empty" };
    }

    videoData = JSON.parse(JSON.parse(videoData).flashvars.metadata);

    if (videoData.provider !== "UPLOADED_ODKL")
        return { error: "link.unsupported" };

    if (videoData.movie.is_live)
        return { error: "content.video.live" };

    if (videoData.movie.duration > env.durationLimit)
        return { error: "content.too_long" };

    let videos = videoData.videos.filter(v => !v.disallowed);
    let bestVideo = videos.find(v => resolutions[v.name] === quality) || videos[videos.length - 1];

    let fileMetadata = {
        title: cleanString(videoData.movie.title.trim()),
        author: cleanString((videoData.author?.name || videoData.compilationTitle).trim()),
    }

    if (bestVideo) return {
        urls: bestVideo.url,
        filenameAttributes: {
            service: "ok",
            id: o.id,
            title: fileMetadata.title,
            author: fileMetadata.author,
            resolution: `${resolutions[bestVideo.name]}p`,
            qualityLabel: `${resolutions[bestVideo.name]}p`,
            extension: "mp4"
        }
    }

    return { error: "fetch.empty" }
}