feat: 增加下载分享检查功能

miniprogram/utils/shareGuide.ts

@@ -0,0 +1,71 @@
+/**
+ * 分享引导工具
+ * 用于控制每日免费下载次数和分享引导
+ */
+
+const STORAGE_KEY_DOWNLOAD_DATE = 'downloadDate';
+const STORAGE_KEY_DOWNLOAD_COUNT = 'downloadCount';
+const STORAGE_KEY_SHARED_DATE = 'sharedDate';
+
+/**
+ * 获取今天的日期字符串（YYYY-MM-DD格式）
+ */
+function getTodayDateString(): string {
+    const today = new Date();
+    const year = today.getFullYear();
+    const month = String(today.getMonth() + 1).padStart(2, '0');
+    const day = String(today.getDate()).padStart(2, '0');
+    return `${year}-${month}-${day}`;
+}
+
+/**
+ * 检查今天是否已经下载过
+ * @returns true表示今天已下载过，false表示今天未下载
+ */
+export function hasDownloadedToday(): boolean {
+    const today = getTodayDateString();
+    const downloadDate = wx.getStorageSync(STORAGE_KEY_DOWNLOAD_DATE);
+    return downloadDate === today;
+}
+
+/**
+ * 记录今天的下载成功
+ */
+export function recordDownloadSuccess(): void {
+    const today = getTodayDateString();
+    wx.setStorageSync(STORAGE_KEY_DOWNLOAD_DATE, today);
+    const count = wx.getStorageSync(STORAGE_KEY_DOWNLOAD_COUNT) || 0;
+    wx.setStorageSync(STORAGE_KEY_DOWNLOAD_COUNT, count + 1);
+}
+
+/**
+ * 检查今天是否已经分享过
+ * @returns true表示今天已分享过，false表示今天未分享
+ */
+export function hasSharedToday(): boolean {
+    const today = getTodayDateString();
+    const sharedDate = wx.getStorageSync(STORAGE_KEY_SHARED_DATE);
+    return sharedDate === today;
+}
+
+/**
+ * 记录今天的分享成功
+ */
+export function recordShareSuccess(): void {
+    const today = getTodayDateString();
+    wx.setStorageSync(STORAGE_KEY_SHARED_DATE, today);
+}
+
+/**
+ * 检查是否需要显示分享引导
+ * @returns true表示需要显示分享引导，false表示不需要
+ */
+export function shouldShowShareGuide(): boolean {
+    // 如果今天已经分享过，不需要显示引导
+    if (hasSharedToday()) {
+        return false;
+    }
+    // 如果今天已经下载过，需要显示引导
+    return hasDownloadedToday();
+}
+