refactor: standardize pagination response structure and enhance cursor handling
- Update various services and hooks to replace 'items' with 'list' for consistency in pagination responses. - Modify PostRepository, commentService, groupService, messageService, and postService to align with the new response structure. - Enhance cursor pagination logic in hooks and components to ensure proper handling of pagination states. - Refactor HomeScreen, PostDetailScreen, SearchScreen, and other components to utilize the updated pagination structure.
This commit is contained in:
lafay
@@ -4,13 +4,12 @@
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* 集成 ProcessPostUseCase 进行状态管理
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*/
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import { useState, useRef, useCallback, useEffect, useMemo } from 'react';
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import { useState, useRef, useCallback, useEffect } from 'react';
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import {
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PostIdentifier,
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PostUpdate,
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PostUpdateType,
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PostDiffConfig,
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PostDiffResult,
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} from '../infrastructure/diff/postTypes';
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import {
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PostDiffCalculator,
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@@ -119,7 +118,6 @@ export function useDifferentialPosts<T extends PostIdentifier = Post>(
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enableDiff = true,
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enableBatching = true,
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maxPostCount = 10000,
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changeRatioThreshold = 0.5,
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listKey = 'default',
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autoSubscribe = true,
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} = options;
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@@ -147,37 +145,7 @@ export function useDifferentialPosts<T extends PostIdentifier = Post>(
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const previousPostsRef = useRef<T[]>(initialPosts);
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const unsubscribeRef = useRef<(() => void) | null>(null);
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// ==================== 初始化 ====================
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// 初始化差异计算器
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useEffect(() => {
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if (enableDiff) {
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calculatorRef.current = createPostDiffCalculator<T>(diffConfig);
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}
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return () => {
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calculatorRef.current = null;
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};
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}, [enableDiff, diffConfig]);
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// 初始化批量处理器
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useEffect(() => {
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if (enableBatching) {
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batcherRef.current = createPostUpdateBatcher(batcherOptions);
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// 订阅批量更新
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const unsubscribe = batcherRef.current.subscribe((updates) => {
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handleBatchUpdates(updates);
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});
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return () => {
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unsubscribe();
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batcherRef.current?.destroy();
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batcherRef.current = null;
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};
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}
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}, [enableBatching, batcherOptions]);
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// ==================== 批量更新处理 ====================
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// ==================== 批量更新处理（须在订阅 batcher 的 useEffect 之前定义）====================
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/**
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* 处理批量更新
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@@ -289,123 +257,34 @@ export function useDifferentialPosts<T extends PostIdentifier = Post>(
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}
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}, []);
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// ==================== 差异计算 ====================
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// ==================== 初始化 ====================
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/**
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* 计算并应用差异
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*/
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const calculateAndApplyDiff = useCallback((newPosts: T[]) => {
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const previousPosts = previousPostsRef.current;
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// 如果帖子数量变化太大，直接重置
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const previousCount = previousPosts.length;
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const currentCount = newPosts.length;
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const changeRatio = previousCount === 0 ? 1 : Math.abs(currentCount - previousCount) / previousCount;
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if (changeRatio > changeRatioThreshold) {
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setPosts(newPosts);
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previousPostsRef.current = newPosts;
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return;
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// 初始化差异计算器
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useEffect(() => {
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if (enableDiff) {
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calculatorRef.current = createPostDiffCalculator<T>(diffConfig);
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}
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return () => {
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calculatorRef.current = null;
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};
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}, [enableDiff, diffConfig]);
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// 使用差异计算
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if (enableDiff && calculatorRef.current) {
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const diff = calculatorRef.current.calculateDiff(previousPosts, newPosts);
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// 初始化批量处理器
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useEffect(() => {
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if (!enableBatching) return;
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if (diff.shouldReset) {
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setPosts(newPosts);
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} else {
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// 将差异转换为更新操作
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const updates: PostUpdate[] = [];
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batcherRef.current = createPostUpdateBatcher(batcherOptions);
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// 处理新增
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if (diff.added.length > 0) {
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if (diff.added.length === 1) {
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updates.push({
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type: PostUpdateType.ADD,
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post: diff.added[0],
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timestamp: Date.now(),
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});
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} else {
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updates.push({
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type: PostUpdateType.BATCH_ADD,
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posts: diff.added,
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timestamp: Date.now(),
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});
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}
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}
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const unsubscribe = batcherRef.current.subscribe((updates) => {
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handleBatchUpdates(updates);
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});
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// 处理更新
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if (diff.updated.length > 0) {
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if (diff.updated.length === 1) {
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updates.push({
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type: PostUpdateType.UPDATE,
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postId: diff.updated[0].post.id,
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updates: diff.updated[0].changes,
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timestamp: Date.now(),
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});
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} else {
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updates.push({
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type: PostUpdateType.BATCH_UPDATE,
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updates: diff.updated.map(u => ({
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postId: u.post.id,
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changes: u.changes,
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})),
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timestamp: Date.now(),
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});
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}
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}
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// 处理删除
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if (diff.deleted.length > 0) {
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if (diff.deleted.length === 1) {
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updates.push({
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type: PostUpdateType.DELETE,
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postId: diff.deleted[0].post.id,
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timestamp: Date.now(),
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});
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} else {
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updates.push({
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type: PostUpdateType.BATCH_DELETE,
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postIds: diff.deleted.map(d => d.post.id),
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timestamp: Date.now(),
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});
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}
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}
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// 处理移动
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if (diff.moved.length > 0) {
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for (const move of diff.moved) {
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updates.push({
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type: PostUpdateType.MOVE,
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postId: move.post.id,
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toIndex: move.toIndex,
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timestamp: Date.now(),
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});
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}
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}
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// 应用更新
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if (updates.length > 0) {
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if (enableBatching && batcherRef.current) {
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batcherRef.current.addUpdates(updates);
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} else {
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handleBatchUpdates(updates);
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}
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}
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}
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} else {
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// 不使用差异计算，直接设置
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setPosts(newPosts);
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}
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// 更新帖子数量限制检查
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if (newPosts.length > maxPostCount) {
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console.warn(`[useDifferentialPosts] Post count (${newPosts.length}) exceeds limit (${maxPostCount})`);
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}
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previousPostsRef.current = newPosts;
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}, [enableDiff, enableBatching, maxPostCount, changeRatioThreshold, handleBatchUpdates]);
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return () => {
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unsubscribe();
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batcherRef.current?.destroy();
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batcherRef.current = null;
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};
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}, [enableBatching, batcherOptions, handleBatchUpdates]);
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// ==================== UseCase 订阅 ====================
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@@ -415,26 +294,39 @@ export function useDifferentialPosts<T extends PostIdentifier = Post>(
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const handleUseCaseEvent = useCallback((event: PostUseCaseEvent) => {
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switch (event.type) {
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case 'state_changed': {
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const { state } = event.payload as { key: string; state: PostsState };
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const { key: eventKey, state } = event.payload as { key: string; state: PostsState };
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// 全局订阅：只应用当前列表 key，避免其他 Tab/列表的 state 覆盖本列表（如 createPost 会更新所有 key）
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if (eventKey !== listKey) {
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break;
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}
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if (state) {
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setLoading(state.isLoading);
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setRefreshing(state.isRefreshing);
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setError(state.error);
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setHasMore(state.hasMore);
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// 如果帖子列表有变化，进行差异计算
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// ProcessPostUseCase 的 state.posts 已是合并后的完整列表。
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// 不再走差异计算 + PostUpdateBatcher：批量应用晚于 previousPostsRef 更新时，
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// BATCH_ADD 会在过短的 currentPosts 上 splice，导致连续游标加载「请求成功但列表不增长」。
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batcherRef.current?.clearPending();
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calculatorRef.current?.reset();
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if (state.posts && state.posts.length > 0) {
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calculateAndApplyDiff(state.posts as unknown as T[]);
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const next = state.posts as unknown as T[];
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if (next.length > maxPostCount) {
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console.warn(`[useDifferentialPosts] Post count (${next.length}) exceeds limit (${maxPostCount})`);
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}
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setPosts(next);
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previousPostsRef.current = next;
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} else {
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setPosts([]);
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previousPostsRef.current = [];
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}
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}
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break;
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}
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case 'posts_loaded': {
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const { posts: loadedPosts } = event.payload;
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if (loadedPosts) {
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calculateAndApplyDiff(loadedPosts as T[]);
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}
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// fetchPosts 在 updatePostsState 时已发出 state_changed（含合并后 posts），此处不再应用，避免与其它 key 竞态或重复计算
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break;
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}
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@@ -485,12 +377,17 @@ export function useDifferentialPosts<T extends PostIdentifier = Post>(
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}
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case 'error_occurred': {
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const { error: errorMsg } = event.payload;
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setError(errorMsg);
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const payload = event.payload as { key?: string; error?: string };
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if (payload.key !== undefined && payload.key !== listKey) {
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break;
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}
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if (payload.error !== undefined) {
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setError(payload.error);
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}
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break;
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}
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}
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}, [calculateAndApplyDiff]);
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}, [listKey, maxPostCount]);
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// 订阅 UseCase 状态变化
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useEffect(() => {
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