feat:增加变化提醒功能

lib/service/health_service.dart

@@ -21,6 +21,18 @@ class HealthService {
     return box.values.toList();
   }
 
+  List<HealthRecord> getAllRecordsOrderByDate() {
+    final records = getAllRecords();
+
+    records.sort((a, b) {
+      final dateA = DateTime.parse(a.date);
+      final dateB = DateTime.parse(b.date);
+      return dateB.compareTo(dateA);
+    });
+
+    return records;
+  }
+
   HealthRecord getRecordByDate(DateTime date) {
     final record = box.values.toList().firstWhere(
       (item) => item.date == formatDate(date),
@@ -30,6 +42,7 @@ class HealthService {
     return record.copyWith();
   }
 
+  // 获取总运动时长
   num getTotalSport() {
     int year = DateTime.now().year;
     int month = DateTime.now().month;
@@ -48,6 +61,7 @@ class HealthService {
     return totalDuration;
   }
 
+  // 获取平均睡眠
   num getAvgSleep() {
     int year = DateTime.now().year;
     int month = DateTime.now().month;
@@ -61,7 +75,7 @@ class HealthService {
         final recordDate = DateTime.parse(record.date);
         if (recordDate.year == year && recordDate.month == month) {
           total++;
-          totalDuration += calSleepMinuteDuration(startTime, endTime);
+          totalDuration += calSleepMinDuration(startTime, endTime);
         }
       }
     }
@@ -73,14 +87,9 @@ class HealthService {
     }
   }
 
+  // 获取最新体重
   num getLatestWeight() {
-    final records = getAllRecords();
-
-    records.sort((a, b) {
-      final dateA = DateTime.parse(a.date);
-      final dateB = DateTime.parse(b.date);
-      return dateB.compareTo(dateA);
-    });
+    final records = getAllRecordsOrderByDate();
 
     for (final record in records) {
       if (record.weight != 0) {
@@ -91,10 +100,68 @@ class HealthService {
     return 0;
   }
 
+  // 获取上次体重
+  num getLastWeight(String date) {
+    final records = getAllRecordsOrderByDate();
+
+    final targetIndex = records.indexWhere((record) => record.date == date);
+    if (targetIndex == -1) return 0;
+
+    // 从目标日期往前找（更早的日期）
+    for (int i = targetIndex + 1; i < records.length; i++) {
+      final record = records[i];
+      if (record.weight != 0) {
+        return record.weight;
+      }
+    }
+
+    return 0;
+  }
+
+  // 获取上次运动时长
+  num getLastSport(String date) {
+    final records = getAllRecordsOrderByDate();
+
+    final targetIndex = records.indexWhere((record) => record.date == date);
+    if (targetIndex == -1) return 0;
+
+    // 从目标日期往前找（更早的日期）
+    for (int i = targetIndex + 1; i < records.length; i++) {
+      final record = records[i];
+      if (record.sportDuration != 0) {
+        return record.sportDuration;
+      }
+    }
+
+    return 0;
+  }
+
+  // 获取上次睡眠时长
+  num getLastSleep(String date) {
+    final records = getAllRecordsOrderByDate();
+
+    final targetIndex = records.indexWhere((record) => record.date == date);
+    if (targetIndex == -1) return 0;
+
+    // 从目标日期往前找（更早的日期）
+    for (int i = targetIndex + 1; i < records.length; i++) {
+      final record = records[i];
+      final startTime = record.sleepStartTime;
+      final endTime = record.sleepEndTime;
+      if (startTime.isNotEmpty && endTime.isNotEmpty) {
+        return calSleepMinDuration(startTime, endTime);
+      }
+    }
+
+    return 0;
+  }
+
   Future<bool> updateRecord(HealthRecord record) async {
     try {
       final existingRecords = box.values.toList();
-      final index = existingRecords.indexWhere((item) => item.date == record.date);
+      final index = existingRecords.indexWhere(
+        (item) => item.date == record.date,
+      );
 
       if (index == -1) {
         await box.add(record);
@@ -102,7 +169,7 @@ class HealthService {
         final key = box.keyAt(index);
         await box.put(key, record);
       }
-      
+
       return true;
     } catch (e) {
       print('Update record error: $e');