Function filterMangaMatches

Source

export function filterMangaMatches(
  mangaMatches: MangaMatchResult[],
  filters: FilterOptions,
  userLibrary: UserMediaList,
  syncConfig: SyncConfig,
): MangaMatchResult[] {
  const statusMap = {
    reading: "reading",
    completed: "completed",
    planned: "plan_to_read",
    paused: "on_hold",
    dropped: "dropped",
  } as const;

  const isStatusMatch = (match: MangaMatchResult) => {
    if (filters.status === "all") return true;
    const mapped = (statusMap as Record<string, string>)[filters.status];
    return mapped === match.kenmeiManga.status.toLowerCase();
  };

  const doesMatchChangeFilter = (match: MangaMatchResult) => {
    if (filters.changes === "all") return true;

    const anilist = match.selectedMatch!;
    const userEntry = userLibrary[anilist.id];

    const isCompletedAndPreserved =
      userEntry?.status === "COMPLETED" && syncConfig.preserveCompletedStatus;

    if (isCompletedAndPreserved) {
      return filters.changes !== "with-changes";
    }

    const changeCount = getChangeCount(match, userLibrary, syncConfig);
    const hasChanges = changeCount > 0;

    if (filters.changes === "with-changes") return hasChanges;
    if (filters.changes === "no-changes") return !hasChanges;
    return true;
  };

  const isLibraryMatch = (match: MangaMatchResult) => {
    if (filters.library === "all") return true;
    const anilist = match.selectedMatch!;
    const isNewEntry = !userLibrary[anilist.id];
    if (filters.library === "new") return isNewEntry;
    if (filters.library === "existing") return !isNewEntry;
    return true;
  };

  return mangaMatches
    .filter((match) => match.status === "matched" || match.status === "manual")
    .filter((match) => match.selectedMatch !== undefined)
    .filter(
      (match) =>
        isStatusMatch(match) &&
        doesMatchChangeFilter(match) &&
        isLibraryMatch(match),
    );
}
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