113 lines
2.8 KiB
TypeScript
113 lines
2.8 KiB
TypeScript
import { useCallback, useEffect, useMemo, useState } from 'react';
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import { sortStoryOptionsByPriority } from '../data/stateFunctions';
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import { annotateStoryOptionsWithGoalAffordance } from '../services/storyEngine/goalDirector';
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import type { GoalStackState, StoryMoment } from '../types';
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const OPTION_PAGE_SIZE = 3;
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export function useStoryOptions(
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currentStory: StoryMoment | null,
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goalStack?: GoalStackState | null,
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) {
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const [optionWindowStart, setOptionWindowStart] = useState(0);
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const activeOptionPool = useMemo(() => {
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if (!currentStory) {
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return [];
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}
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return sortStoryOptionsByPriority(
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annotateStoryOptionsWithGoalAffordance(
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currentStory.options,
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goalStack,
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),
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);
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}, [currentStory, goalStack]);
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const optionPoolSignature = useMemo(
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() =>
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activeOptionPool
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.map((option) =>
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[
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option.functionId,
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option.actionText,
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option.text ?? '',
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option.goalAffordance?.goalId ?? '',
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option.goalAffordance?.relation ?? '',
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].join('::'),
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)
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.join('||'),
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[activeOptionPool],
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);
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useEffect(() => {
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setOptionWindowStart(0);
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}, [currentStory, optionPoolSignature]);
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const displayedOptions = useMemo(
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() => {
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const windowOptions = activeOptionPool.slice(
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optionWindowStart,
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optionWindowStart + OPTION_PAGE_SIZE,
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);
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if (
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windowOptions.some(
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(option) => option.goalAffordance?.relation === 'advance',
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)
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) {
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return windowOptions;
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}
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const pinnedAdvanceOption =
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activeOptionPool.find(
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(option) => option.goalAffordance?.relation === 'advance',
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) ?? null;
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if (!pinnedAdvanceOption) {
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return windowOptions;
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}
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return [
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pinnedAdvanceOption,
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...windowOptions
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.filter(
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(option) =>
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!(
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option.functionId === pinnedAdvanceOption.functionId
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&& option.actionText === pinnedAdvanceOption.actionText
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),
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)
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.slice(0, OPTION_PAGE_SIZE - 1),
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];
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},
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[activeOptionPool, optionWindowStart],
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);
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const canRefreshOptions = activeOptionPool.length > OPTION_PAGE_SIZE;
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const handleRefreshOptions = useCallback(() => {
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if (activeOptionPool.length <= OPTION_PAGE_SIZE) return;
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const nextStart = optionWindowStart + OPTION_PAGE_SIZE;
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if (nextStart < activeOptionPool.length) {
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setOptionWindowStart(nextStart);
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return;
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}
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setOptionWindowStart(0);
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}, [activeOptionPool.length, optionWindowStart]);
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const resetStoryOptions = useCallback(() => {
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setOptionWindowStart(0);
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}, []);
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return {
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activeOptionPool,
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displayedOptions,
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optionWindowStart,
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canRefreshOptions,
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handleRefreshOptions,
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resetStoryOptions,
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};
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}
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