AttendanceMonthGroupDisplayHelper.cs
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using System.Collections.Generic;
using System.Linq;
using NCC.Extend.Entitys.lq_attendance_record;
namespace NCC.Extend
{
/// <summary>
/// 按自然月从打卡记录中的考勤组名称快照生成展示文案（多月多组按首次出现日期用 → 连接）。
/// </summary>
public static class AttendanceMonthGroupDisplayHelper
{
/// <summary>
/// 根据当月有效打卡记录中的 <c>F_AttendanceGroupName</c> 聚合展示；无任何快照时使用主档分组名称；仍无则「无」。
/// </summary>
/// <param name="monthRecords">该员工该自然月内的打卡记录（通常已为有效记录）</param>
/// <param name="profileAttendanceGroupName">员工主档当前绑定的考勤组名称（兜底）</param>
public static string BuildDisplay(
IEnumerable<LqAttendanceRecordEntity> monthRecords,
string profileAttendanceGroupName)
{
var list = monthRecords == null
? new List<LqAttendanceRecordEntity>()
: monthRecords.Where(r => r != null).ToList();
var orderedNames = list
.Where(r => !string.IsNullOrWhiteSpace(r.AttendanceGroupName))
.Select(r => new { Name = r.AttendanceGroupName.Trim(), Date = r.AttendanceDate.Date })
.GroupBy(x => x.Name)
.Select(g => new { Name = g.Key, FirstDate = g.Min(x => x.Date) })
.OrderBy(x => x.FirstDate)
.Select(x => x.Name)
.ToList();
if (orderedNames.Count == 0)
{
return string.IsNullOrWhiteSpace(profileAttendanceGroupName)
? "无"
: profileAttendanceGroupName.Trim();
}
return orderedNames.Count == 1
? orderedNames[0]
: string.Join("→", orderedNames);
}
}
}