502 lines
16 KiB
TypeScript
502 lines
16 KiB
TypeScript
import { useEffect, useLayoutEffect, useMemo, useState, useCallback, useRef } from 'react';
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import { StyleSheet, View, Dimensions, Text, Pressable, PanResponder, Animated as RNAnimated, ImageBackground } from 'react-native';
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import { useTranslation } from 'react-i18next';
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import { useNavigation, useFocusEffect } from 'expo-router';
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import Animated, {
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Easing,
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runOnJS,
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useAnimatedStyle,
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useSharedValue,
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withSequence,
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withTiming,
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} from 'react-native-reanimated';
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import { MOCK_CONTENT } from '@/src/constants/mockContent';
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import {
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addFavorite,
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getThemeMode,
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getUserProfile,
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setReaction,
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setThemeMode,
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getRecoFeedCache,
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setRecoFeedCache,
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getUserProfileScoring,
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getRecoFeedHistory,
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recordRecoFeedServed,
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type ThemeMode,
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} from '@/src/storage/appStorage';
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import { fetchRecoFeed } from '@/src/services/recoApi';
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import ProfileModal from '@/components/home/ProfileModal';
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import ThemeModal from '@/components/home/ThemeModal';
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import ThemeIcon from '@/assets/images/home/theme.svg';
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import MyIcon from '@/assets/images/home/my.svg';
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import LikeFilledIcon from '@/assets/images/home/like_filled.svg';
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import LikeIcon from '@/assets/images/icon/like_icon.svg';
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const { height: SCREEN_HEIGHT } = Dimensions.get('window');
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// 预定义风景图列表
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const NATURE_IMAGES = [
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require('@/assets/theme/nature/1.png'),
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require('@/assets/theme/nature/2.png'),
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require('@/assets/theme/nature/3.png'),
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require('@/assets/theme/nature/4.png'),
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require('@/assets/theme/nature/5.png'),
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require('@/assets/theme/nature/6.png'),
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require('@/assets/theme/nature/7.png'),
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require('@/assets/theme/nature/8.png'),
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require('@/assets/theme/nature/9.png'),
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require('@/assets/theme/nature/10.png'),
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require('@/assets/theme/nature/11.png'),
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require('@/assets/theme/nature/12.png'),
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require('@/assets/theme/nature/13.png'),
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require('@/assets/theme/nature/14.png'),
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require('@/assets/theme/nature/15.png'),
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require('@/assets/theme/nature/17.png'),
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require('@/assets/theme/nature/18.png'),
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require('@/assets/theme/nature/19.png'),
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require('@/assets/theme/nature/20.png'),
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require('@/assets/theme/nature/22.png'),
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];
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// 预定义颜色列表
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const THEME_COLORS = [
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'#F7D9BF',
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'#CBF2D8',
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'#F5CDDE',
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'#F2ECCB',
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'#E2CBF2',
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'#CBD9F2',
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];
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type FeedItem = { content_id: string; text: string };
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export default function HomeScreen() {
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const { t, i18n } = useTranslation();
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const isEnglish = i18n.language?.startsWith('en');
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const recoLang: 'en' | 'tc' = i18n.language?.toLowerCase().startsWith('zh') ? 'tc' : 'en';
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const navigation = useNavigation();
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const [index, setIndex] = useState(0);
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const [themeMode, setThemeModeState] = useState<ThemeMode>('scenery');
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const [themeOpen, setThemeOpen] = useState(false);
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const [profileOpen, setProfileOpen] = useState(false);
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const [profileName, setProfileName] = useState<string | undefined>(undefined);
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const [busy, setBusy] = useState(false);
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const [likeFilled, setLikeFilled] = useState(false);
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const [feedItems, setFeedItems] = useState<FeedItem[]>([]);
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const [isFetching, setIsFetching] = useState(false);
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// 解决语言切换时重复触发拉取/清空导致“文案不停跳动”的问题：
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// 用 ref 持有最新状态，避免 useCallback 依赖 feedItems/isFetching 造成函数 identity 变化 → effect 重复执行
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const feedItemsRef = useRef<FeedItem[]>([]);
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const isFetchingRef = useRef(false);
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useEffect(() => {
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feedItemsRef.current = feedItems;
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}, [feedItems]);
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useEffect(() => {
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isFetchingRef.current = isFetching;
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}, [isFetching]);
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// 动画相关 Shared Values
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const translateY = useSharedValue(0);
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const opacity = useSharedValue(1);
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const likeScale = useSharedValue(1);
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// 统一文案对象结构
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const currentFeed = useMemo(() => {
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if (feedItems.length > 0) {
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return feedItems;
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}
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return MOCK_CONTENT.map(item => ({
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content_id: item.id,
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text: t(item.textKey)
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}));
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}, [feedItems, t]);
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const item = useMemo(() => {
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const data = currentFeed[index % currentFeed.length];
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return {
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id: String(data.content_id),
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text: data.text
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};
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}, [currentFeed, index]);
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// 异步拉取新文案
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const fetchNewFeed = useCallback(async () => {
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if (isFetchingRef.current) return;
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isFetchingRef.current = true;
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setIsFetching(true);
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try {
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const scoringProfile = await getUserProfileScoring();
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if (!scoringProfile) return;
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const history = await getRecoFeedHistory();
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const { items, meta } = await fetchRecoFeed({
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k: 30,
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user_profile: scoringProfile,
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already_recommended_ids: history.already_recommended_ids,
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touched_or_viewed_ids: history.touched_or_viewed_ids,
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});
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if (items.length > 0) {
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const wasEmpty = feedItemsRef.current.length === 0;
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const newCache = {
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saved_at: new Date().toISOString(),
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lang: recoLang,
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items: items.map((x) => ({ content_id: x.content_id, text: x.text })),
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meta: meta as Record<string, unknown>,
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};
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await setRecoFeedCache(newCache);
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await recordRecoFeedServed(items.map((x) => x.content_id));
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setFeedItems(newCache.items.map((x) => ({ content_id: String(x.content_id), text: x.text })));
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// 如果当前是 mock 数据，切换到新数据的第一条
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if (wasEmpty) {
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setIndex(0);
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}
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}
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} catch (error) {
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console.error('Failed to fetch new feed:', error);
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} finally {
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isFetchingRef.current = false;
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setIsFetching(false);
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}
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}, [recoLang]);
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// 每次进入页面或页面获得焦点时刷新个人信息和缓存文案
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useFocusEffect(
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useCallback(() => {
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let cancelled = false;
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(async () => {
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const mode = await getThemeMode();
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const profile = await getUserProfile();
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const cache = await getRecoFeedCache();
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if (cancelled) return;
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setThemeModeState(mode);
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setProfileName(profile.name);
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// 语言切换时：旧语言缓存不复用，触发重新拉取
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if (cache && cache.items.length > 0 && (cache.lang ?? 'en') === recoLang) {
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setFeedItems(cache.items.map((x) => ({ content_id: String(x.content_id), text: x.text })));
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} else {
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// 语言不匹配或没有缓存：先清空回落到本地 mock（会立即随语言切换），再拉取对应语言的推荐文案
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setFeedItems([]);
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setIndex(0);
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fetchNewFeed();
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}
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})();
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return () => {
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cancelled = true;
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};
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}, [fetchNewFeed, recoLang])
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);
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const backgroundColor = useMemo(() => {
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if (themeMode === 'color') {
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const colorIndex = Math.floor(index / 10) % THEME_COLORS.length;
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return THEME_COLORS[colorIndex];
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}
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return '#F4D6C2'; // 风景模式下的默认底色（图片加载前显示）
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}, [themeMode, index]);
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// 计算当前应该显示的风景图索引（滑动 10 次切换一张）
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const natureImageIndex = useMemo(() => {
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return Math.floor(index / 10) % NATURE_IMAGES.length;
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}, [index]);
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const currentNatureImage = NATURE_IMAGES[natureImageIndex];
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useLayoutEffect(() => {
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navigation.setOptions({
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headerShadowVisible: false,
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// 为了让风景/颜色两种主题下“文案的视觉居中位置”一致，统一使用透明 Header
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// 颜色主题下 Header 透明也不会影响观感（背景就是纯色）
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headerStyle: { backgroundColor: 'transparent' },
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headerTransparent: true,
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headerRight: () => (
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<View style={styles.headerRight}>
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<CircleIconButton
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onPress={() => setThemeOpen(true)}
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accessibilityLabel={t('home.theme')}
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>
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<ThemeIcon width={18} height={18} />
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</CircleIconButton>
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<CircleIconButton
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onPress={() => setProfileOpen(true)}
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accessibilityLabel={t('home.profile')}
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>
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<MyIcon width={18} height={18} />
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</CircleIconButton>
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</View>
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),
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});
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}, [backgroundColor, themeMode, navigation, t]);
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const textAnimatedStyle = useAnimatedStyle(() => ({
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transform: [{ translateY: translateY.value }],
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opacity: opacity.value,
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}));
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const likeAnimatedStyle = useAnimatedStyle(() => ({
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transform: [{ scale: likeScale.value }],
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}));
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// 切换到下一条文案的统一动画逻辑
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const triggerNextContent = useCallback(() => {
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if (busy) return;
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setBusy(true);
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// 1. 当前文案向上移动并消失
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translateY.value = withTiming(-40, { duration: 300, easing: Easing.out(Easing.quad) });
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opacity.value = withTiming(0, { duration: 300 }, (finished) => {
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if (finished) {
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// 2. 切换数据索引
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runOnJS(setIndex)(index + 1);
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runOnJS(setLikeFilled)(false);
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// 检查是否需要拉取新文案（当接近当前列表末尾时，例如还剩 5 条）
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if (index + 5 >= currentFeed.length && !isFetching) {
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runOnJS(fetchNewFeed)();
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}
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// 3. 准备下一条文案：先瞬移到下方 40pt
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translateY.value = 40;
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// 4. 下一条文案向上移动到原位并显现
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translateY.value = withTiming(0, { duration: 400, easing: Easing.out(Easing.back(1)) });
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opacity.value = withTiming(1, { duration: 400 }, (finished) => {
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if (finished) {
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runOnJS(setBusy)(false);
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}
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});
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}
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});
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}, [busy, index, currentFeed.length, isFetching, fetchNewFeed, translateY, opacity]);
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const lastTapRef = useRef<number>(0);
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// 使用 Ref 解决 PanResponder 闭包陷阱，确保手势回调能拿到最新的 state 和 function
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const handlersRef = useRef({ onPressLike, triggerNextContent });
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useEffect(() => {
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handlersRef.current = { onPressLike, triggerNextContent };
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}, [onPressLike, triggerNextContent]);
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// 使用系统自带的 PanResponder 代替第三方手势库
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const panResponder = useRef(
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PanResponder.create({
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onStartShouldSetPanResponder: () => true, // 允许开始捕获
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onMoveShouldSetPanResponder: (_, gestureState) => {
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// 只有当垂直滑动距离大于 20 时才接管位移手势
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return Math.abs(gestureState.dy) > 20;
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},
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onPanResponderRelease: (_, gestureState) => {
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const now = Date.now();
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const DOUBLE_TAP_DELAY = 300;
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// 1. 双击逻辑判定
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if (now - lastTapRef.current < DOUBLE_TAP_DELAY) {
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// 判定为双击
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if (Math.abs(gestureState.dx) < 10 && Math.abs(gestureState.dy) < 10) {
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runOnJS(handlersRef.current.onPressLike)();
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lastTapRef.current = 0; // 重置
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return;
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}
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}
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lastTapRef.current = now;
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// 2. 上滑逻辑判定
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if (gestureState.dy < -50) { // 上滑超过 50pt
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runOnJS(handlersRef.current.triggerNextContent)();
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}
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},
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})
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).current;
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async function onPressLike() {
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if (busy) return;
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setLikeFilled(true);
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// 1. 获取当前日期
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const now = new Date();
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const dateStr = `${now.getFullYear()}.${String(now.getMonth() + 1).padStart(2, '0')}.${String(now.getDate()).padStart(2, '0')}`;
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// 2. 保存到收藏夹，包含当前背景信息
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const favItem = {
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favId: String(Date.now()), // 生成唯一 ID
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id: item.id,
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text: item.text,
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date: dateStr,
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themeMode: themeMode,
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background: themeMode === 'scenery' ? String(natureImageIndex) : backgroundColor,
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};
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console.log('Home: Triggering addFavorite', JSON.stringify(favItem));
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await addFavorite(favItem);
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// 3. 记录到后端 Reaction（喜欢）
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console.log('Home: Triggering setReaction', item.id);
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await setReaction(item.id, 'like');
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// 4. 爱心缩放动画
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likeScale.value = withSequence(
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withTiming(0.8, { duration: 100 }),
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withTiming(1.2, { duration: 150 }),
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withTiming(1, { duration: 100 }, (finished) => {
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if (finished) {
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console.log('Home: Like animation finished, triggering next content');
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runOnJS(triggerNextContent)();
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}
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})
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);
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}
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async function onSelectTheme(next: ThemeMode) {
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setThemeModeState(next);
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await setThemeMode(next);
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setThemeOpen(false);
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}
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return (
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<View style={[styles.container, { backgroundColor }]} {...panResponder.panHandlers}>
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{themeMode === 'scenery' && (
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<ImageBackground
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source={currentNatureImage}
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style={StyleSheet.absoluteFill}
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resizeMode="cover"
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/>
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)}
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<Animated.View style={[styles.card, textAnimatedStyle, themeMode === 'scenery' && styles.sceneryCard]}>
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<Text style={[styles.text, isEnglish && styles.textEnglish, themeMode === 'scenery' && styles.sceneryText]}>
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{item.text}
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</Text>
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</Animated.View>
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<View style={styles.actions}>
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<Animated.View style={[styles.reactionButton, likeAnimatedStyle]}>
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<Pressable
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onPress={onPressLike}
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accessibilityRole="button"
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accessibilityLabel={t('home.like')}
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hitSlop={20}
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style={styles.reactionInner}
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>
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{likeFilled ? (
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<LikeFilledIcon width={35} height={36} style={{ color: '#EA6969' }} />
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) : (
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<LikeIcon
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width={35}
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height={36}
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style={{ color: themeMode === 'scenery' ? '#FFFFFF' : '#5E2A28' }}
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/>
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)}
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</Pressable>
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</Animated.View>
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</View>
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<ThemeModal visible={themeOpen} mode={themeMode} onSelect={onSelectTheme} onClose={() => setThemeOpen(false)} />
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<ProfileModal
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visible={profileOpen}
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name={profileName}
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onClose={() => setProfileOpen(false)}
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/>
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</View>
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);
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}
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function CircleIconButton({
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onPress,
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accessibilityLabel,
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children,
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}: {
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onPress: () => void;
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accessibilityLabel: string;
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children: React.ReactNode;
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}) {
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return (
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<Pressable
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onPress={onPress}
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hitSlop={10}
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accessibilityRole="button"
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accessibilityLabel={accessibilityLabel}
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style={styles.circleBtn}
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>
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{children}
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</Pressable>
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);
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}
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const styles = StyleSheet.create({
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container: {
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flex: 1,
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padding: 20,
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justifyContent: 'center',
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alignItems: 'center',
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},
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headerRight: {
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flexDirection: 'row',
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gap: 10,
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paddingRight: 10,
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},
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circleBtn: {
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width: 34,
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height: 34,
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borderRadius: 17,
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backgroundColor: 'rgba(255,255,255,0.75)',
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alignItems: 'center',
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justifyContent: 'center',
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},
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card: {
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position: 'absolute',
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top: 0,
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left: 0,
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right: 0,
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bottom: 0,
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justifyContent: 'center',
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alignItems: 'center',
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paddingHorizontal: 30,
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zIndex: 5, // 降低层级，防止遮挡底部按钮
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},
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text: {
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fontSize: 22,
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lineHeight: 32,
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color: '#5E2A28',
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fontWeight: '700',
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textAlign: 'center',
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},
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textEnglish: {
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fontFamily: 'STIXTwoText',
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// 英文字体观感更细一点，避免过粗
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fontWeight: '600',
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},
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sceneryCard: {
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// 风景模式下稍微收窄文案宽度，增加呼吸感
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paddingHorizontal: 50,
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},
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sceneryText: {
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color: '#FFFFFF',
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textShadowColor: 'rgba(0, 0, 0, 0.5)',
|
||
textShadowOffset: { width: 0, height: 1 },
|
||
textShadowRadius: 4,
|
||
},
|
||
actions: {
|
||
position: 'absolute',
|
||
bottom: SCREEN_HEIGHT * 0.16,
|
||
left: 0,
|
||
right: 0,
|
||
flexDirection: 'row',
|
||
justifyContent: 'center',
|
||
zIndex: 20, // 提升层级，确保在最顶层可点击
|
||
},
|
||
reactionButton: {
|
||
alignItems: 'center',
|
||
justifyContent: 'center',
|
||
},
|
||
reactionInner: {
|
||
alignItems: 'center',
|
||
justifyContent: 'center',
|
||
},
|
||
});
|