Function filterByChallengeId

curriculum/src/filter.ts:57–93

(superblocks: T[], { challengeId }: { challengeId?: string } = {})

 * @returns {Array<Object>} Filtered superblocks containing only the matching challenge
 */
export function filterByChallengeId<
  T extends { blocks: { challengeOrder: { id: string }[] }[] }
>(superblocks: T[], { challengeId }: { challengeId?: string } = {}): T[] {
  if (!challengeId) {
    return superblocks;
  }

  const findChallengeIndex = (challengeOrder: { id: string }[], id: string) =>
    challengeOrder.findIndex(challenge => challenge.id === id);

  const filterChallengeOrder = (
    challengeOrder: { id: string }[],
    id: string
  ) => {
    const index = findChallengeIndex(challengeOrder, id);
    if (index === -1) return [];

    return challengeOrder.slice(index, index + 2);
  };

  return superblocks
    .map(superblock => ({
      ...superblock,
      blocks: superblock.blocks
        .map(block => ({
          ...block,
          challengeOrder: filterChallengeOrder(
            block.challengeOrder,
            challengeId
          )
        }))
        .filter(
          block => block.challengeOrder && block.challengeOrder.length > 0
        )
    }))
    .filter(superblock => superblock.blocks.length > 0);
}

export interface Filter {
  superBlock?: string;