feat: 开发收藏和下载功能

miniprogram/mathPages/mathDraw/mathDraw.ts

@@ -6,9 +6,9 @@ import {
     type MathTypeConfig,
     type MathTypeAction,
 } from './registry';
-import { getPublishMetaByMathState } from './mathDraw.config';
+import { getPublishMetaByMathState, MATH_WORKSHEET_DEFINITIONS } from './mathDraw.config';
 import type { DebugPublishMeta } from '../../utils/debugPublish';
-import { incrementWorksheetLikes } from '../../utils/worksheetStats';
+import { addFavorite, removeFavorite, batchCheckFavorited } from '../../utils/favorites';
 
 const TYPE_LIST = MATH_TYPE_CONFIGS.map((t) => ({
     id: t.id,
@@ -25,6 +25,7 @@ createMathPage({
     currentTypeConfig: null as MathTypeConfig | null,
     currentData: null as any,
     routeExtra: null as Record<string, any> | null,
+    _favoritedMap: {} as Record<string, boolean>,
 
     data: {
         pageTitle: '数学练习',
@@ -82,6 +83,9 @@ createMathPage({
         });
 
         this.initPageInfo(routeId, title);
+
+        // 加载收藏状态
+        this.loadFavoritedMap();
     },
 
     onCanvasReady(e: WechatMiniprogram.CustomEvent) {
@@ -131,7 +135,9 @@ createMathPage({
             selectedTypeId: id,
             functionId: id,
             pageTitle: title,
-            isPreviewFavorite: false,
+            isPreviewFavorite: !!this._favoritedMap[
+                getPublishMetaByMathState(id, id, mode)?.id || id
+            ],
             showActions: !!typeConfig.actions,
             currentActions: typeConfig.actions || [],
             actionsTitle: typeConfig.actionsTitle || '选择模式',
@@ -172,7 +178,7 @@ createMathPage({
         this.setData({
             currentMode: value,
             pageTitle: title,
-            isPreviewFavorite: false,
+            isPreviewFavorite: !!this._favoritedMap[this.getWorksheetStatsIdFor(value)],
         });
 
         this.initPageInfo(this.data.functionId, title);
@@ -266,9 +272,14 @@ createMathPage({
     async onPreviewFavorite() {
         const next = !this.data.isPreviewFavorite;
         this.setData({ isPreviewFavorite: next });
-        if (next) {
-            const id = this.getWorksheetStatsId();
-            if (id) incrementWorksheetLikes(id);
+        const id = this.getWorksheetStatsId();
+        if (id) {
+            this._favoritedMap[id] = next;
+            if (next) {
+                addFavorite(id);
+            } else {
+                removeFavorite(id);
+            }
         }
         wx.showToast({
             title: next ? '收藏成功' : '已取消收藏',
@@ -285,6 +296,25 @@ createMathPage({
         return meta?.id || this.data.functionId;
     },
 
+    getWorksheetStatsIdFor(mode: string): string {
+        const meta = getPublishMetaByMathState(
+            this.data.functionId,
+            this.data.selectedTypeId,
+            mode,
+        );
+        return meta?.id || this.data.functionId;
+    },
+
+    async loadFavoritedMap() {
+        const ids = MATH_WORKSHEET_DEFINITIONS.map((d) => d.id);
+        this._favoritedMap = await batchCheckFavorited(ids);
+        // 回显当前选中的收藏状态
+        const currentId = this.getWorksheetStatsId();
+        if (this._favoritedMap[currentId]) {
+            this.setData({ isPreviewFavorite: true });
+        }
+    },
+
     getPublishMeta(): DebugPublishMeta {
         const meta = getPublishMetaByMathState(
             this.data.functionId,