Method backfillChannelPosters

server/modules/channelModule.js:976–1018

* Backfill poster.jpg files for existing channel folders. * Copies channelthumb to each channel's folder as poster.jpg if it doesn't exist. * @param {Array} channels - Array of channel database records * @returns {Promise }

(channels)

   * @returns {Promise<void>}
   */
  async backfillChannelPosters(channels) {
    try {
      const config = configModule.getConfig() || {};
      const shouldWriteChannelPosters = config.writeChannelPosters !== false;

      if (!shouldWriteChannelPosters) {
        return;
      }

      const outputDir = configModule.directoryPath;
      const imageDir = configModule.getImagePath();

      if (!outputDir || !fs.existsSync(outputDir)) {
        return;
      }

      for (const channel of channels) {
        if (!channel.channel_id) continue;

        // Use folder_name (sanitized by yt-dlp) if available, fall back to uploader
        const channelFolderName = channel.folder_name || channel.uploader;
        if (!channelFolderName) continue;

        const channelFolderPath = path.join(outputDir, channelFolderName);
        const channelPosterPath = path.join(channelFolderPath, 'poster.jpg');

        // Check if channel folder exists and poster.jpg doesn't exist
        if (fs.existsSync(channelFolderPath) && !fs.existsSync(channelPosterPath)) {
          const channelThumbPath = path.join(imageDir, `channelthumb-${channel.channel_id}.jpg`);

          if (fs.existsSync(channelThumbPath)) {
            try {
              fs.copySync(channelThumbPath, channelPosterPath);
            } catch (copyErr) {
              logger.error({ err: copyErr, channelFolderName }, 'Error backfilling poster for channel');
            }
          }
        }
      }
    } catch (err) {
      logger.error({ err }, 'Error during channel poster backfill');
    }
  }

  /**
   * Read all enabled channels from the database.