56 lines
2.1 KiB
C#
56 lines
2.1 KiB
C#
namespace Repository;
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public interface IEmailMessageRepository : IBaseRepository<EmailMessage>
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{
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Task<EmailMessage?> ExistsAsync(string md5);
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/// <summary>
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/// 分页获取邮件列表（游标分页）
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/// </summary>
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/// <param name="lastReceivedDate">上一页最后一条记录的接收时间</param>
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/// <param name="lastId">上一页最后一条记录的ID</param>
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/// <param name="pageSize">每页数量</param>
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/// <returns>邮件列表、最后接收时间和最后ID</returns>
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Task<(List<EmailMessage> list, DateTime? lastReceivedDate, long lastId)> GetPagedListAsync(DateTime? lastReceivedDate, long? lastId, int pageSize = 20);
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/// <summary>
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/// 获取总数
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/// </summary>
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Task<long> GetTotalCountAsync();
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}
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public class EmailMessageRepository(IFreeSql freeSql) : BaseRepository<EmailMessage>(freeSql), IEmailMessageRepository
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{
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public async Task<EmailMessage?> ExistsAsync(string md5)
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{
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return await FreeSql.Select<EmailMessage>()
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.Where(e => e.Md5 == md5)
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.FirstAsync();
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}
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public async Task<(List<EmailMessage> list, DateTime? lastReceivedDate, long lastId)> GetPagedListAsync(DateTime? lastReceivedDate, long? lastId, int pageSize = 20)
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{
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var query = FreeSql.Select<EmailMessage>();
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// 如果提供了游标，则获取小于游标位置的记录
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if (lastReceivedDate.HasValue && lastId.HasValue)
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{
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query = query.Where(e => e.ReceivedDate < lastReceivedDate.Value ||
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(e.ReceivedDate == lastReceivedDate.Value && e.Id < lastId.Value));
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}
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var list = await query
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.OrderByDescending(e => e.ReceivedDate)
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.OrderByDescending(e => e.Id)
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.Page(1, pageSize)
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.ToListAsync();
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var lastRecord = list.Count > 0 ? list.Last() : null;
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return (list, lastRecord?.ReceivedDate, lastRecord?.Id ?? 0);
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}
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public async Task<long> GetTotalCountAsync()
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{
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return await FreeSql.Select<EmailMessage>().CountAsync();
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}
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} |