///搜索记录帮助类
import 'package:shared_preferences/shared_preferences.dart';

class SearchRecordUtil {
  static void addRecord(String st) async {
    if (st.isEmpty || st.trim().isEmpty) {
      return;
    }
    final prefs = await SharedPreferences.getInstance();
    List<String> list = await listRecord();

    //删除重复的数据
    for (var i = 0; i < list.length; i++) {
      if (list[i] == st.trim()) {
        list.removeAt(i);
        i--;
      }
    }

    list.insert(0, st.trim());
    if (list.length > 10) {
      list = list.sublist(0, 10);
    }
    await prefs.setStringList("searchRecord", list);
  }

  static void clearRecord() async {
    final prefs = await SharedPreferences.getInstance();
    await prefs.setStringList("searchRecord", []);
  }

  static Future<List<String>> listRecord() async {
    final prefs = await SharedPreferences.getInstance();
    List<String>? list = prefs.getStringList("searchRecord");
    list ??= [];
    return list;
  }
}