Fix for modern Plex metadata format

[bluesfan77]

For me, Plex would go to a XML page. Newer versions of Plex no longer include IMDb/TVDb IDs in the /search response. The old format had them directly in the guid attribute (e.g. guid="imdb://tt0111161"), but modern Plex uses guid="plex://movie/..." instead. The IMDb/TVDb IDs are now only available as child elements in the individual metadata endpoint (e.g. /library/metadata/9939).
This fix adds a second lookup step — after getting search results, it fetches the full metadata for each result and checks there for the IMDb/TVDb ID match instead.

function getInfoFromPlex(title, movie_id, tvdb_id, plex_url, plex_token) {
return new Promise(resolve => {
const titleUri = title.replace(/&/g,'%26').replace(/#/g,'%23');
const imdbid = "tt" + movie_id;
const url = plex_url + "/search?query=" + titleUri + "&X-Plex-Token=" + plex_token;
GM.xmlHttpRequest({
method: "GET",
timeout: 10000,
url: url,
onload: function(response) {
if (response.status == 200) {
const parser = new DOMParser();
const result = parser.parseFromString(response.responseText, "text/xml");
const videos = $(result).find("Video");

      if (videos.length === 0) {
        GM.setValue("Plex_metadata_key", "none");
        resolve(false);
        return;
      }

      // Collect all metadata keys from search results
      const keys = [];
      videos.each(function() {
        const k = $(this).attr("key");
        if (k) keys.push(k);
      });

      // Check each result's full metadata for matching IMDb/TVDb ID
      let checked = 0;
      let found = false;
      keys.forEach(function(key) {
        if (found) return;
        const metaUrl = plex_url + key + "?X-Plex-Token=" + plex_token;
        GM.xmlHttpRequest({
          method: "GET",
          timeout: 10000,
          url: metaUrl,
          onload: function(r2) {
            checked++;
            if (!found && r2.status == 200) {
              const resultStr2 = String(r2.responseText);
              if (resultStr2.match(imdbid) || resultStr2.match(tvdb_id)) {
                found = true;
                const result2 = parser.parseFromString(r2.responseText, "text/xml");
                const metadata_key = $(result2).find("Video").attr("key");
                if (metadata_key != undefined) {
                  GM.setValue("Plex_metadata_key", metadata_key);
                }
                resolve(true);
              }
            }
            if (!found && checked === keys.length) {
              GM.setValue("Plex_metadata_key", "none");
              resolve(false);
            }
          },
          onerror: function() {
            checked++;
            if (!found && checked === keys.length) {
              GM.setValue("Plex_metadata_key", "none");
              resolve(false);
            }
          },
          ontimeout: function() {
            checked++;
            if (!found && checked === keys.length) {
              GM.setValue("Plex_metadata_key", "none");
              resolve(false);
            }
          }
        });
      });
    } else if (response.status == 401) {
      GM.setValue("Plex_metadata_key", "none");
      GM.notification("Unauthorized! \nCheck if Plex Token is correct.", "IMDb Scout Mod (Plex)");
      resolve("stop");
    } else {
      GM.setValue("Plex_metadata_key", "none");
      GM.notification("HTTP status is not 200.", "IMDb Scout Mod (Plex)");
      resolve("stop");
    }
  },
  onerror: function() {
    GM.setValue("Plex_metadata_key", "none");
    GM.notification("Request Error! \nCheck if Plex Server is running, \nand if Plex Server URL is correct.", "IMDb Scout Mod (Plex)");
    resolve("stop");
  },
  onabort: function() {
    GM.setValue("Plex_metadata_key", "none");
    resolve("stop");
  },
  ontimeout: function() {
    GM.setValue("Plex_metadata_key", "none");
    GM.notification("Request timed out!", "IMDb Scout Mod (Plex)");
    resolve("stop");
  }
});

});
}