Function buildChannelIdMap

frontend/src/utils/guideUtils.js:28–61

(channels, tvgsById, epgs = {})

export const PROGRAM_GAP_PX = 2;

export function buildChannelIdMap(channels, tvgsById, epgs = {}) {
  const map = new Map();
  channels.forEach((channel) => {
    const tvgRecord = channel.epg_data_id
      ? tvgsById[channel.epg_data_id]
      : null;

    // For dummy EPG sources, ALWAYS use channel UUID to ensure unique programs per channel
    // This prevents multiple channels with the same dummy EPG from showing identical data
    let tvgId;
    if (tvgRecord?.epg_source) {
      const epgSource = epgs[tvgRecord.epg_source];
      if (epgSource?.source_type === 'dummy') {
        // Dummy EPG: use channel UUID for uniqueness
        tvgId = channel.uuid;
      } else {
        // Regular EPG: use tvg_id from EPG data, or fall back to channel UUID
        tvgId = tvgRecord.tvg_id ?? channel.uuid;
      }
    } else {
      // No EPG data: use channel UUID
      tvgId = channel.uuid;
    }

    if (tvgId) {
      const tvgKey = String(tvgId);
      if (!map.has(tvgKey)) {
        map.set(tvgKey, []);
      }
      map.get(tvgKey).push(channel.id);
    }
  });
  return map;
}

export const mapProgramsByChannel = (programs, channelIdByTvgId) => {
  if (!programs?.length || !channelIdByTvgId?.size) {