Initial commit

miniprogram/pages/category/index.js

@@ -0,0 +1,142 @@
+import { getCategoryList } from '../../services/good/fetchCategoryList';
+import { fetchGoodsList } from '../../services/good/fetchGoodsList';
+
+Page({
+  data: {
+    list: [],
+    goodsList: [],
+    hasLoaded: false,
+    loadMoreStatus: 0,
+    categoryId: '',
+    categoryName: '',
+  },
+  pageNum: 1,
+  pageSize: 30,
+  total: 0,
+  async init() {
+    try {
+      const result = await getCategoryList();
+      this.setData({
+        list: result,
+      });
+    } catch (error) {
+      console.error('err:', error);
+    }
+  },
+
+  onShow() {
+    this.getTabBar().init();
+  },
+  onChange(e) {
+    const { item, source } = e.detail;
+    let categoryId = item.groupId || item.categoryId || '';
+    const categoryName = item.name || '';
+
+    // 兼容“全部”按钮的 groupId: `${id}_all`
+    if (categoryId && categoryId.toString().endsWith('_all')) {
+      categoryId = categoryId.toString().replace('_all', '');
+    }
+
+    // 二级分类：跳转到商品列表页；一级分类：当前页加载数据
+    if (source === 'child') {
+      const url = `/pages/goods/list/index?categoryId=${encodeURIComponent(categoryId)}&categoryName=${encodeURIComponent(categoryName)}`;
+      wx.navigateTo({ url });
+      return;
+    }
+
+    // 一级分类只在当前页加载商品
+    this.pageNum = 1;
+    this.setData({ categoryId, categoryName, loadMoreStatus: 0 });
+    this.loadCategoryGoods(true);
+  },
+
+  // 组装查询参数
+  buildQueryParams(reset = true) {
+    const params = {
+      pageNum: reset ? 1 : this.pageNum + 1,
+      pageSize: this.pageSize,
+      category_id: this.data.categoryId || undefined,
+    };
+    return params;
+  },
+
+  async loadCategoryGoods(reset = true) {
+    const { loadMoreStatus, goodsList = [] } = this.data;
+    if (loadMoreStatus !== 0) return;
+
+    const params = this.buildQueryParams(reset);
+    this.setData({ loadMoreStatus: 1 });
+    try {
+      const result = await fetchGoodsList(params);
+
+      if (!result || !result.spuList) {
+        this.setData({ hasLoaded: true, loadMoreStatus: 0 });
+        return;
+      }
+
+      const { spuList, totalCount = 0 } = result;
+      const merged = reset ? spuList : goodsList.concat(spuList);
+      const status = merged.length === totalCount ? 2 : 0;
+
+      this.pageNum = params.pageNum || 1;
+      this.total = totalCount;
+
+      this.setData({
+        goodsList: merged,
+        loadMoreStatus: status,
+        hasLoaded: true,
+      });
+    } catch (error) {
+      console.error('获取分类商品失败:', error);
+      this.setData({ loadMoreStatus: 0, hasLoaded: true });
+    }
+  },
+
+  onReachBottom() {
+    const { goodsList } = this.data;
+    const total = this.total || 0;
+    if (goodsList.length >= total && total > 0) {
+      this.setData({ loadMoreStatus: 2 });
+      return;
+    }
+    this.loadCategoryGoods(false);
+  },
+
+  handleAddCart() {
+    wx.showToast({ title: '点击加购', icon: 'none' });
+  },
+
+
+  onLoad() {
+    this.init(true);
+  },
+
+  // 分享功能
+  onShareAppMessage() {
+    return {
+      title: '商品分类 - 浏览更多精选商品',
+      path: '/pages/category/index'
+    };
+  },
+
+  // 分享到朋友圈
+  onShareTimeline() {
+    return {
+      title: '商品分类 - 浏览更多精选商品'
+    };
+  },
+
+  handleClickGoods(e) {
+    const { index } = e.detail || {};
+    const { goodsList = [] } = this.data;
+    const item = goodsList[index];
+    const spuId = item && (item.spuId || item.id || item.skuId);
+    if (!spuId) {
+      wx.showToast({ title: '无法识别商品ID', icon: 'none' });
+      return;
+    }
+    wx.navigateTo({
+      url: `/pages/goods/details/index?spuId=${encodeURIComponent(spuId)}`
+    });
+  },
+});