biss
08396a6e23
通知阶段移除逐条查询学生、规则、辅导员的 N+1 数据库访问。 不及格预警从“每个学生一次统计 + 一次查重”改为批量分组统计与一次性已有记录集合查询。 保持原有阈值、去重、通知内容与权限行为。
301 lines
15 KiB
C#
301 lines
15 KiB
C#
using System.ComponentModel.DataAnnotations;
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using Jiaowu.Api.Contracts;
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using Jiaowu.Api.Domain.Academic;
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using Jiaowu.Api.Domain.Identity;
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using Jiaowu.Api.Infrastructure.Auth;
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using Jiaowu.Api.Infrastructure.Persistence;
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using Microsoft.AspNetCore.Authorization;
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using Microsoft.AspNetCore.Mvc;
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using Microsoft.EntityFrameworkCore;
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namespace Jiaowu.Api.Controllers;
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[ApiController]
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[Authorize]
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[Route("api/warnings")]
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public sealed class WarningsController(AppDbContext db, ICurrentUserDataScope scope) : ControllerBase
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{
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private const string Managers = SystemRoles.SuperAdmin + "," + SystemRoles.AcademicAdmin;
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// ═══════════ Rules (admin) ═══════════
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[HttpGet("rules")]
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[Authorize(Roles = Managers)]
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public async Task<ActionResult> GetRules(Guid academicTermId, CancellationToken ct) =>
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Ok(await db.WarningRules.AsNoTracking().Where(x => x.AcademicTermId == academicTermId)
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.OrderBy(x => x.Type).Select(x => new { x.Id, Type = (int)x.Type, x.Name, x.Threshold, x.IsEnabled, x.NotifyStudent, x.NotifyCounselor, x.Description, x.AutoCheckEnabled, CheckDayOfWeek = x.CheckDayOfWeek ?? 0, x.CheckHour, x.CheckMinute, x.LastCheckAt })
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.ToListAsync(ct));
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[HttpPut("rules")]
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[Authorize(Roles = Managers)]
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public async Task<ActionResult> SaveRules(Guid academicTermId, List<WarningRuleDto> rules, CancellationToken ct)
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{
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if (rules.GroupBy(x => x.Type).Any(group => group.Count() > 1))
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return BadRequest(new ProblemDetails { Title = "预警类型不能重复。", Status = StatusCodes.Status400BadRequest });
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if (rules.Any(x => x.CheckDayOfWeek is < 0 or > 7 || x.CheckHour is < 0 or > 23 || x.CheckMinute is < 0 or > 59))
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return BadRequest(new ProblemDetails { Title = "自动检测时间无效。", Status = StatusCodes.Status400BadRequest });
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var existing = await db.WarningRules.Where(x => x.AcademicTermId == academicTermId).ToListAsync(ct);
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var incomingTypes = rules.Select(x => x.Type).ToHashSet();
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db.WarningRules.RemoveRange(existing.Where(x => !incomingTypes.Contains(x.Type)));
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foreach (var r in rules)
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{
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var entity = existing.FirstOrDefault(x => x.Type == r.Type);
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if (entity is null)
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{
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entity = new WarningRule
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{
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AcademicTermId = academicTermId,
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Type = r.Type,
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Name = r.Name.Trim()
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};
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db.WarningRules.Add(entity);
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}
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entity.Name = r.Name.Trim();
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entity.Threshold = r.Threshold;
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entity.IsEnabled = r.IsEnabled;
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entity.NotifyStudent = r.NotifyStudent;
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entity.NotifyCounselor = r.NotifyCounselor;
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entity.Description = r.Description?.Trim();
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entity.AutoCheckEnabled = r.AutoCheckEnabled;
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entity.CheckDayOfWeek = r.CheckDayOfWeek == 0 ? null : r.CheckDayOfWeek;
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entity.CheckHour = r.CheckHour;
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entity.CheckMinute = r.CheckMinute;
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}
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await db.SaveChangesAsync(ct);
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return NoContent();
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}
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// ═══════════ Detection + Records ═══════════
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[HttpPost("detect")]
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[Authorize(Roles = Managers)]
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public async Task<ActionResult> DetectWarnings(Guid academicTermId, CancellationToken ct)
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{
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var rules = await db.WarningRules.Where(x => x.AcademicTermId == academicTermId && x.IsEnabled).ToListAsync(ct);
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if (rules.Count == 0) return Ok(new { Generated = 0, Message = "当前学期无启用的预警规则。" });
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var studentInfos = await db.Students.Where(x => x.Status == StudentStatus.Active).Select(x => new StudentInfo(x.Id, x.UserId, x.Name, x.AdministrativeClassId)).ToListAsync(ct);
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var generated = new List<WarningRecord>();
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foreach (var rule in rules)
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{
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switch (rule.Type)
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{
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case WarningType.FailedCredits:
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generated.AddRange(await DetectFailedCredits(rule, academicTermId, studentInfos, ct));
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break;
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case WarningType.LowGPA:
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generated.AddRange(await DetectLowGPA(rule, academicTermId, studentInfos, ct));
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break;
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case WarningType.Absenteeism:
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generated.AddRange(await DetectAbsenteeism(rule, academicTermId, studentInfos, ct));
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break;
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case WarningType.GraduationDelay:
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generated.AddRange(await DetectGraduationDelay(rule, academicTermId, studentInfos, ct));
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break;
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}
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}
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if (generated.Count > 0)
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{
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db.WarningRecords.AddRange(generated);
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await db.SaveChangesAsync(ct);
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var studentsById = studentInfos.ToDictionary(student => student.Id);
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var rulesByType = rules.ToDictionary(rule => rule.Type);
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var classIds = studentInfos.Select(student => student.ClassId).Distinct().ToArray();
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var counselorsByClass = await db.AdministrativeClasses.AsNoTracking()
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.WhereIn(classIds, item => item.Id)
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.Where(item => item.CounselorUserId != null)
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.Select(item => new { item.Id, CounselorUserId = item.CounselorUserId!.Value })
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.ToDictionaryAsync(item => item.Id, item => item.CounselorUserId, ct);
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foreach (var w in generated)
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{
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var si = studentsById[w.StudentId];
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var r = rulesByType[w.Type];
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if (r.NotifyStudent && si.UserId.HasValue)
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await NotificationService.SendAsync(db, si.UserId.Value, "学业预警", w.Detail, "/warnings", ct, NotificationCategory.Warning);
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if (r.NotifyCounselor && counselorsByClass.TryGetValue(si.ClassId, out var counselorId))
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{
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await NotificationService.SendAsync(db, counselorId, "学生学业预警", $"{si.Name}：{w.Detail}", "/warnings", ct, NotificationCategory.Warning);
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}
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}
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}
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return Ok(new { Generated = generated.Count });
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}
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[HttpGet("records")]
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[Authorize(Roles = Managers + "," + SystemRoles.Counselor)]
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public async Task<ActionResult<PagedResult<WarningRecordListItem>>> GetRecords(
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Guid? academicTermId,
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WarningType? type,
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int page = 1,
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int pageSize = 20,
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CancellationToken ct = default)
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{
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if (page < 1 || pageSize is < 1 or > 100)
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return ValidationProblem("页码必须大于 0，且每页条数应在 1 至 100 之间。");
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var q = db.WarningRecords.AsNoTracking().AsQueryable();
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if (scope.Current.Scope == DataScope.College || scope.Current.IsInRole(SystemRoles.Counselor))
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{
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var classIds = await db.AdministrativeClasses.Where(c => c.CounselorUserId == scope.Current.UserId).Select(c => c.Id).ToListAsync(ct);
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if (classIds.Count > 0)
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q = q.WhereIn(classIds, x => x.Student!.AdministrativeClassId);
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else if (scope.Current.RestrictedCollegeId.HasValue)
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q = q.Where(x => x.Student!.AdministrativeClass!.Major!.CollegeId == scope.Current.RestrictedCollegeId);
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}
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if (academicTermId.HasValue) q = q.Where(x => x.AcademicTermId == academicTermId);
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if (type.HasValue) q = q.Where(x => x.Type == type);
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var total = await q.CountAsync(ct);
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var items = await q
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.OrderByDescending(x => x.CreatedAt)
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.ThenByDescending(x => x.Id)
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.Skip((page - 1) * pageSize)
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.Take(pageSize)
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.Select(x => new WarningRecordListItem(
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x.Id,
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x.StudentId,
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x.Student!.Name,
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x.Student.StudentNumber,
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x.Student.AdministrativeClass!.Name,
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(int)x.Type,
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(int)x.Status,
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x.TriggerValue,
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x.Detail,
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x.AcknowledgedAt,
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x.AcknowledgeComment,
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x.CreatedAt))
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.ToListAsync(ct);
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return Ok(new PagedResult<WarningRecordListItem>(items, total, page, pageSize));
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}
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// ═══════════ Student ═══════════
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[HttpGet("my-warnings")]
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[Authorize(Roles = SystemRoles.Student)]
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public async Task<ActionResult> GetMyWarnings(CancellationToken ct)
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{
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var sid = await GetStudentIdAsync(ct);
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if (sid is null) return StudentNotFound();
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return Ok(await db.WarningRecords.AsNoTracking().Where(x => x.StudentId == sid).OrderByDescending(x => x.CreatedAt)
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.Select(x => new { x.Id, Type = (int)x.Type, Status = (int)x.Status, x.TriggerValue, x.Detail, x.AcknowledgedAt, x.AcknowledgeComment, x.CreatedAt, TermName = x.AcademicTermId })
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.ToListAsync(ct));
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}
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[HttpPost("{id:guid}/acknowledge")]
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[Authorize(Roles = SystemRoles.Student)]
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public async Task<ActionResult> Acknowledge(Guid id, [FromBody] AckBody body, CancellationToken ct)
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{
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var sid = await GetStudentIdAsync(ct);
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if (sid is null) return StudentNotFound();
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var w = await db.WarningRecords.FirstOrDefaultAsync(x => x.Id == id && x.StudentId == sid, ct);
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if (w is null) return NotFound();
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if (w.Status != WarningStatus.Active) return ConflictProblem("该预警已处理。");
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w.Status = WarningStatus.Acknowledged;
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w.AcknowledgedAt = DateTime.UtcNow;
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w.AcknowledgeComment = body.Comment?.Trim();
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await db.SaveChangesAsync(ct);
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return NoContent();
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}
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// ═══════════ Detection logic ═══════════
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private async Task<List<WarningRecord>> DetectFailedCredits(WarningRule rule, Guid termId, List<StudentInfo> students, CancellationToken ct)
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{
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var studentIds = students.Select(student => student.Id).ToArray();
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var existingStudentIds = await db.WarningRecords.AsNoTracking()
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.Where(record => record.AcademicTermId == termId && record.Type == rule.Type)
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.Select(record => record.StudentId)
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.ToHashSetAsync(ct);
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var failedByStudent = await db.GradeRecords.AsNoTracking()
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.Where(record => studentIds.Contains(record.StudentId) &&
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record.GradeSheet!.TeachingTask!.AcademicTermId == termId &&
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record.GradeSheet.Status == GradeSheetStatus.Published &&
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record.TotalScore < 60)
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.GroupBy(record => record.StudentId)
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.Select(group => new { StudentId = group.Key, Failed = group.Count() })
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.ToListAsync(ct);
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return failedByStudent
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.Where(item => item.Failed >= rule.Threshold &&
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!existingStudentIds.Contains(item.StudentId))
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.Select(item => new WarningRecord
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{
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StudentId = item.StudentId,
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Type = rule.Type,
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TriggerValue = item.Failed,
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Detail = $"不及格课程 {item.Failed} 门，达到预警阈值 {rule.Threshold} 门。",
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AcademicTermId = termId
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})
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.ToList();
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}
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private async Task<List<WarningRecord>> DetectLowGPA(WarningRule rule, Guid termId, List<StudentInfo> students, CancellationToken ct)
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{
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var records = new List<WarningRecord>();
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foreach (var s in students)
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{
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var grades = await db.GradeRecords.Where(x => x.StudentId == s.Id && x.GradeSheet!.TeachingTask!.AcademicTermId == termId && x.GradeSheet.Status == GradeSheetStatus.Published && x.GradePoint != null).ToListAsync(ct);
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if (grades.Count == 0) continue;
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var gpa = grades.Average(x => x.GradePoint!.Value);
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if (gpa < rule.Threshold)
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{
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if (await db.WarningRecords.AnyAsync(x => x.StudentId == s.Id && x.AcademicTermId == termId && x.Type == WarningType.LowGPA, ct)) continue;
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records.Add(new WarningRecord { StudentId = s.Id, Type = rule.Type, TriggerValue = Math.Round(gpa, 2), Detail = $"平均绩点 {gpa:F2}，低于预警阈值 {rule.Threshold}。", AcademicTermId = termId });
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}
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}
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return records;
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}
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private async Task<List<WarningRecord>> DetectAbsenteeism(WarningRule rule, Guid termId, List<StudentInfo> students, CancellationToken ct)
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{
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var records = new List<WarningRecord>();
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foreach (var s in students)
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{
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var absent = await db.AttendanceRecords.CountAsync(x => x.StudentId == s.Id && x.AttendanceSheet!.Status == AttendanceSheetStatus.Submitted && x.AttendanceSheet.TeachingTask!.AcademicTermId == termId && (x.Status == AttendanceStatus.Absent || x.Status == AttendanceStatus.Late), ct);
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if (absent >= rule.Threshold)
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{
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if (await db.WarningRecords.AnyAsync(x => x.StudentId == s.Id && x.AcademicTermId == termId && x.Type == WarningType.Absenteeism, ct)) continue;
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records.Add(new WarningRecord { StudentId = s.Id, Type = rule.Type, TriggerValue = absent, Detail = $"缺勤/迟到 {absent} 次，达到预警阈值 {rule.Threshold} 次。", AcademicTermId = termId });
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}
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}
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return records;
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}
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private async Task<List<WarningRecord>> DetectGraduationDelay(WarningRule rule, Guid termId, List<StudentInfo> students, CancellationToken ct)
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{
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var records = new List<WarningRecord>();
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foreach (var s in students)
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{
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var total = await db.GradeRecords.CountAsync(x => x.StudentId == s.Id && x.GradeSheet!.Status == GradeSheetStatus.Published && x.TotalScore < 60, ct);
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if (total >= rule.Threshold)
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{
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if (await db.WarningRecords.AnyAsync(x => x.StudentId == s.Id && x.AcademicTermId == termId && x.Type == WarningType.GraduationDelay, ct)) continue;
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records.Add(new WarningRecord { StudentId = s.Id, Type = rule.Type, TriggerValue = total, Detail = $"累计不及格 {total} 门，达到延毕预警阈值 {rule.Threshold} 门。", AcademicTermId = termId });
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}
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}
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return records;
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}
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private async Task<Guid?> GetStudentIdAsync(CancellationToken ct) => await db.Students.Where(s => s.UserId == scope.Current.UserId).Select(s => (Guid?)s.Id).FirstOrDefaultAsync(ct);
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private ActionResult StudentNotFound() => Conflict(new ProblemDetails { Title = "未关联学生档案", Status = 409 });
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private ActionResult ConflictProblem(string d) => Conflict(new ProblemDetails { Title = "操作失败", Detail = d, Status = 409 });
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}
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public sealed record StudentInfo(Guid Id, Guid? UserId, string Name, Guid ClassId);
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public sealed record WarningRecordListItem(
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Guid Id,
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Guid StudentId,
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string StudentName,
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string StudentNumber,
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string ClassName,
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int Type,
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int Status,
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decimal TriggerValue,
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string Detail,
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DateTime? AcknowledgedAt,
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string? AcknowledgeComment,
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DateTime CreatedAt);
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public sealed record WarningRuleDto(WarningType Type, [MaxLength(100)] string Name, decimal Threshold, bool IsEnabled, bool NotifyStudent, bool NotifyCounselor, [MaxLength(300)] string? Description, bool AutoCheckEnabled, int? CheckDayOfWeek, int CheckHour, int CheckMinute);
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public sealed record AckBody([MaxLength(300)] string? Comment);
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