Function useDiscardPost

packages/shared/src/hooks/input/useDiscardPost.ts:33–69

({
  post,
  draftIdentifier,
}: UseDiscardPostProps = {})

}

export const useDiscardPost = ({
  post,
  draftIdentifier,
}: UseDiscardPostProps = {}): UseDiscardPost => {
  const formRef = useRef<HTMLFormElement>();
  const draftKey = generateWritePostKey(draftIdentifier ?? post?.id);
  const [draft, updateDraft, isDraftReady, isUpdatingDraft] =
    usePersistentContext<Partial<WriteForm>>(draftKey, {});
  const onValidateAction = useCallback(() => {
    if (!formRef.current) {
      return true;
    }

    const form = formToJson<EditPostProps>(formRef.current);
    const isTitleSaved = checkSavedProperty('title', form, draft, post);
    const isContentSaved = checkSavedProperty('content', form, draft, post);
    return isTitleSaved && isContentSaved;
  }, [post, draft]);

  const { onAskConfirmation } = useExitConfirmation({ onValidateAction });

  const clearDraft = useCallback(async () => {
    await updateDraft({});
    await deleteCache(draftKey);
    await deleteCache(generateWritePostKey());
  }, [updateDraft, draftKey]);

  return {
    onAskConfirmation,
    draft,
    updateDraft,
    isDraftReady,
    formRef,
    clearDraft,
    isUpdatingDraft,
  };
};