opensubs.js

const request = require("request");
const fs = require("fs");
const zlib = require("zlib");
const iconv = require("iconv-lite");

function isUtf8(buffer) {
  // Check if buffer is valid UTF-8
  try {
    return Buffer.from(buffer).toString('utf8').indexOf('\ufffd') === -1;
  } catch (e) {
    return false;
  }
}


function getSubText(url) {
  const output = "myfileofsub.txt";
  const encoding = "windows-1256";

  return new Promise((resolve, reject) => {
    request({ url: url, encoding: null }, function (err, resp, body) {
      if (err) return reject(err);

      zlib.gunzip(body, (err, decompressed) => {
        if (err) return reject(err);

        try {
          let decodedText = decompressed;

          if (!isUtf8(decompressed)) {
            // Convert using iconv if not UTF-8
            decodedText = iconv.decode(decompressed, encoding);
            console.log(`File written with encoding: ${encoding}`);
          } else {
            decodedText = decompressed.toString('utf8');
            console.log("File written with encoding: UTF-8");
          }

          //fs.writeFileSync(output, decodedText);
          resolve(decodedText);
        } catch (err) {
          reject(err);
        }
      });
    });
  });
}



function getTvSubs(imdbId, season, episode, sublanguageId="eng") {
  const url = `https://rest.opensubtitles.org/search/episode-${episode}/imdbid-${imdbId}/season-${season}/sublanguageid-${sublanguageId}`;
  const headers = {
    "x-user-agent": "trailers.to-UA",
    "content-type": "application/x-www-form-urlencoded; charset=utf-8"
  };

  return new Promise((resolve, reject) => {
    request({ url, headers }, (error, response, body) => {
      if (error) {
        console.error("Error during request:", error.message);
        return reject(error);
      }

      try {
        const jsonData = JSON.parse(body);

        if (Array.isArray(jsonData) && jsonData.length > 0) {
          const subtitlesInfo = jsonData.map((subtitle) => ({
            FileName: subtitle.SubFileName,
            SubFormat: subtitle.SubFormat,
            SubDownloadLink: subtitle.SubDownloadLink,
          }));

          resolve(subtitlesInfo);
        } else {
          resolve([]); // No subtitles found
        }
      } catch (parseError) {
        reject(`Error parsing JSON: ${parseError.message}`);
      }
    });
  });
}

function getMovSubs(imdbId, sublanguageId="eng") {
  console.log(sublanguageId);
  const url = `https://rest.opensubtitles.org/search/imdbid-${imdbId}/sublanguageid-${sublanguageId}`;
  const headers = {
    "x-user-agent": "trailers.to-UA",
    "content-type": "application/x-www-form-urlencoded; charset=utf-8"
  };

  return new Promise((resolve, reject) => {
    request({ url, headers }, (error, response, body) => {
      if (error) {
        console.error("Error during request:", error.message);
        return reject(error);
      }

      try {
        const jsonData = JSON.parse(body);

        if (Array.isArray(jsonData)) {
          const subtitlesInfo = jsonData.map((subtitle) => ({
            FileName: subtitle.SubFileName,
            SubFormat: subtitle.SubFormat,
            SubDownloadLink: subtitle.SubDownloadLink,
          }));

          resolve(subtitlesInfo);
        } else {
          console.error("Invalid response format:", body);
          resolve([]); // No subtitles found
        }
      } catch (parseError) {
        console.error("Error parsing JSON:", parseError.message);
        reject(`Error parsing JSON: ${parseError.message}`);
      }
    });
  });
}
 
module.exports = { getSubText, getMovSubs, getTvSubs };