xuyueandClaude Opus 5.5
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看板「改 / 新的一节 / 清掉」和后台课堂作业的增改删，前后比较学生看到的那一节， 真变了才按班推 lesson_update（加了、去掉了、语言、顺序），走学生的 /ws/config，老师不收。 没点刷新又改会合并成一条。 Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
794 lines
34 KiB
TypeScript
794 lines
34 KiB
TypeScript
import {
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STUDENT_ROLES,
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classLessonRequestSchema,
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type ClassActivity,
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type ClassToday,
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type ClassBoard,
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type ClassBoardStudent,
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type ClassLesson,
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type ClassActivityProblem,
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type LastVisit,
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type LessonLanguage,
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type StatisticInfo,
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} from '@oj2/contract'
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import { and, asc, desc, eq, gte, inArray, isNotNull, isNull, lt, sql } from 'drizzle-orm'
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import { Hono } from 'hono'
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import { requireAuth, requireTeacher, type AppEnv } from '../auth/middleware'
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import { seenToday } from '../auth/presence'
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import { getLoginWindow } from '../auth/session'
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import { presenceOf } from '../collab/state'
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import { db, schema } from '../db'
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import { challengeSuccessesOf } from '../services/challenge'
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import { failure, parseBody, success } from '../http'
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import { isAccepted } from '../judge/status'
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import { activityRows, classMemberIds, FLOWCHART_PASSED, lessonLanguageFilter, SOLVED_RESULTS, suggestActiveClass } from '../services/class-activity'
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import { accepted } from '../services/learning-stats'
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import { announceLessonChange, resolveLessonProblems, todayLessonSnapshot } from '../services/lesson'
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import { calendarDay, dayStart, localTime } from '../time'
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export const classroomRoutes = new Hono<AppEnv>()
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/**
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* 同班同一天有这么多人做过，就算「班里在做」。2025 秋的实测分布是两极的：
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* (班级, 日, 题) 要么只有 1 个人（自己在刷），要么 13 人以上（老师点的题），
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* 5 落在中间的空档里，最小的那几个班（十来个人）也够得着。
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*/
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const CLASS_ACTIVITY_MIN_USERS = 5
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/** 往回找几天：上完课第二天在家补作业、请假回来的学生，都还能看到上一次课做了什么 */
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const CLASS_ACTIVITY_LOOKBACK_DAYS = 7
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const CLASS_ACTIVITY_LIMIT = 8
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interface ClassDayGroup {
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day: string
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problemId: number
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firstAt: string
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userCount: number
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acceptedCount: number
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}
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/**
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* 某个班从 `since` 起、按（东八区日, 题）分组的做题人数和通过人数。只算正常状态的学生，
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* 不含比赛提交，代码和流程图合起来数（见 activityRows）。`minUsers` 是「班里在做」的门槛，
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* 给了 `problemIds`（老师布置的题）时不设门槛 —— 那几道题是确定的，一个人都没交也要列出来。
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*/
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async function classDayGroups(
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className: string,
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since: string,
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options: { minUsers?: number; problemIds?: number[]; language?: LessonLanguage | null } = {},
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): Promise<ClassDayGroup[]> {
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const activity = activityRows({
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since,
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users: classMemberIds(className),
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problemIds: options.problemIds,
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language: options.language,
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})
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const day = sql<string>`to_char(${localTime(activity.createTime)}, 'YYYY-MM-DD')`
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const userCount = sql<number>`count(distinct ${activity.userId})::int`
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const query = db
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.select({
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day,
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problemId: activity.problemId,
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firstAt: sql<string>`min(${activity.createTime})`,
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userCount,
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acceptedCount: sql<number>`count(distinct ${activity.userId}) filter (where ${activity.solved})::int`,
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})
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.from(activity)
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.groupBy(day, activity.problemId)
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return options.minUsers ? query.having(sql`${userCount} >= ${options.minUsers}`) : query
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}
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/** 按 id 取题，只留学生看得见的（题库里、visible），被藏起来的点进去也是 404 */
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async function visibleProblems(ids: number[]) {
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if (!ids.length) return new Map<number, { id: number; displayId: string; title: string; isSql: boolean }>()
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const rows = await db
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.select({
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id: schema.problem.id,
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displayId: schema.problem.displayId,
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title: schema.problem.title,
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isSql: sql<boolean>`${schema.problem.languages} @> '["SQL"]'::jsonb`,
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})
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.from(schema.problem)
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.where(and(inArray(schema.problem.id, ids), eq(schema.problem.visible, true), isNull(schema.problem.contestId)))
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return new Map(rows.map((row) => [row.id, row]))
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}
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/**
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* 老师给这个班今天布置的题（problem.id，按输入顺序）、选的语言、布置时刻和布置的老师；
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* 没布置为 null。一天布置过几节的，取最后布置的那一节。老师写真名：老师之间认的是名字，用户名（lwp0201、little）认不出是谁
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*/
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async function lessonPlan(className: string, day: string) {
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const [row] = await db
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.select({
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id: schema.classLesson.id,
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problemIds: schema.classLesson.problemIds,
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language: schema.classLesson.language,
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createdAt: schema.classLesson.createdAt,
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createdBy: sql<string>`coalesce(nullif(${schema.userProfile.realName}, ''), ${schema.user.username})`,
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})
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.from(schema.classLesson)
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.innerJoin(schema.user, eq(schema.user.id, schema.classLesson.createdBy))
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.leftJoin(schema.userProfile, eq(schema.userProfile.userId, schema.classLesson.createdBy))
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.where(and(eq(schema.classLesson.className, className), eq(schema.classLesson.day, day)))
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.orderBy(desc(schema.classLesson.createdAt), desc(schema.classLesson.id))
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.limit(1)
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return row?.problemIds.length ? row : null
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}
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/**
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* 班里「这节课」的题。老师在课堂看板布置过就用老师的（source = teacher），
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* 否则从同班提交记录推断（source = inferred）：同班同一天 ≥ 5 人做过的题，只取最近的
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* **一天**、按那天第一次有人提交的时间排 —— 大致就是老师点题的顺序。
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*
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* 老师布置的优先，是因为推断在上课头几分钟是空的（还没人交），而那正是没听清题号的
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* 学生最需要它的时候。
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*/
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async function classLessonProblems(className: string, lookbackDays: number) {
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const today = calendarDay()
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const plan = await lessonPlan(className, today)
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if (plan) {
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const planned = plan.problemIds
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const [problems, groups] = await Promise.all([
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visibleProblems(planned),
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classDayGroups(className, dayStart(), { problemIds: planned, language: plan.language }),
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])
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const groupById = new Map(groups.map((row) => [row.problemId, row]))
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return {
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source: 'teacher' as const,
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lessonId: plan.id,
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day: today,
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language: plan.language ?? null,
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assignedAt: plan.createdAt,
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assignedBy: plan.createdBy,
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problems: planned.flatMap((id) => {
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const problem = problems.get(id)
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if (!problem) return []
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const group = groupById.get(id)
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return [
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{
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...problem,
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userCount: group?.userCount ?? 0,
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acceptedCount: group?.acceptedCount ?? 0,
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},
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]
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}),
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}
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}
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const since = dayStart(Date.now() - (lookbackDays - 1) * 86_400_000)
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const groups = await classDayGroups(className, since, { minUsers: CLASS_ACTIVITY_MIN_USERS })
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const latest = groups.reduce<string | null>((acc, row) => (!acc || row.day > acc ? row.day : acc), null)
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const picked = groups
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.filter((row) => row.day === latest)
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.sort((a, b) => a.firstAt.localeCompare(b.firstAt))
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.slice(0, CLASS_ACTIVITY_LIMIT)
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const problems = await visibleProblems(picked.map((row) => row.problemId))
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return {
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source: picked.length ? ('inferred' as const) : null,
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lessonId: null,
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day: picked.length ? latest : null,
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// 推断出来的课不知道老师要的是哪种语言，不限
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language: null,
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assignedAt: null,
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assignedBy: null,
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problems: picked.flatMap((row) => {
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const problem = problems.get(row.problemId)
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return problem ? [{ ...problem, userCount: row.userCount, acceptedCount: row.acceptedCount }] : []
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}),
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}
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}
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/** 「上次来」超过这么多天就不提那次做了什么，只在问候里说一句隔了多久 */
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const LAST_VISIT_MAX_DAYS = 30
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/**
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* 首页的「上次来」卡：上次登录到这次登录之间交过什么、哪道还没做对。
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* 原来是登录后弹的「登录速报」，数字外加 AI 两句话 —— AI 只拿到那五个数，说的就是复述，
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* 还要同步等模型（最长 60 秒）弹框才出来；现在拆进首页，没做对的题给「接着做」
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*/
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classroomRoutes.get('/me/last-visit', requireAuth, async (c) => {
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const user = c.get('user')!
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const window = await getLoginWindow(c)
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const previousLogin = window?.previousLogin ?? null
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if (!window || !previousLogin || Date.now() - new Date(previousLogin).getTime() > LAST_VISIT_MAX_DAYS * 864e5) {
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return success(c, { previousLogin, summary: null } satisfies LastVisit)
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}
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const rows = await db
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.select({
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problemId: schema.submission.problemId,
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problemDisplayId: schema.problem.displayId,
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title: schema.problem.title,
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result: schema.submission.result,
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createTime: schema.submission.createTime,
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})
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.from(schema.submission)
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.innerJoin(schema.problem, eq(schema.problem.id, schema.submission.problemId))
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.where(
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and(
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eq(schema.submission.userId, user.id),
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isNull(schema.submission.contestId),
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gte(schema.submission.createTime, previousLogin),
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lt(schema.submission.createTime, window.loginAt),
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),
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)
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.orderBy(asc(schema.submission.createTime))
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if (!rows.length) return success(c, { previousLogin, summary: null } satisfies LastVisit)
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// 按题归拢：rows 按时间正序，所以后来的覆盖 lastResult / lastTime，第一次 AC 的先进 solved
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const byProblem = new Map<
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number,
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{
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problemDisplayId: string
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title: string
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attempts: number
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lastResult: (typeof rows)[number]['result']
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lastTime: string
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solved: boolean
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}
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>()
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const solved: { problemDisplayId: string; title: string }[] = []
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for (const row of rows) {
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const item = byProblem.get(row.problemId) ?? {
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problemDisplayId: row.problemDisplayId,
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title: row.title,
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attempts: 0,
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lastResult: row.result,
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lastTime: row.createTime,
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solved: false,
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}
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item.attempts++
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item.lastResult = row.result
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item.lastTime = row.createTime
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if (!item.solved && accepted.includes(row.result)) {
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item.solved = true
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solved.push({ problemDisplayId: row.problemDisplayId, title: row.title })
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}
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byProblem.set(row.problemId, item)
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}
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// 那次没做对的，再看以前、以及这次登录之后有没有做对过 —— 做对过的就不再催「接着做」
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const tried = [...byProblem].filter(([, item]) => !item.solved).map(([id]) => id)
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const everSolved = tried.length
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? new Set(
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(
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await db
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.selectDistinct({ problemId: schema.submission.problemId })
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.from(schema.submission)
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.where(
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and(
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eq(schema.submission.userId, user.id),
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isNull(schema.submission.contestId),
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inArray(schema.submission.problemId, tried),
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inArray(schema.submission.result, accepted),
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),
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)
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).map((row) => row.problemId),
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)
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: new Set<number>()
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const unsolved = tried
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.filter((id) => !everSolved.has(id))
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.map((id) => byProblem.get(id)!)
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.sort((a, b) => b.lastTime.localeCompare(a.lastTime))
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.slice(0, 3)
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.map(({ problemDisplayId, title, attempts, lastResult }) => ({
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problemDisplayId,
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title,
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attempts,
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lastResult,
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}))
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return success(c, {
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previousLogin,
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summary: {
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submissionCount: rows.length,
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solvedCount: solved.length,
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lastSubmitTime: rows.at(-1)!.createTime,
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unsolved,
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solved: solved.slice(0, 12),
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},
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} satisfies LastVisit)
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})
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/**
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* 学生首页的「班里在做」。课上老师报题号、全班去找 —— 这是 2025 秋七成非比赛提交的
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* 来路，但界面上原本没有它的入口，没听清题号的只能问同桌。
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*/
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classroomRoutes.get('/me/class-activity', requireAuth, async (c) => {
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const user = c.get('user')!
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if (!user.className) {
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return success(c, {
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className: null,
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day: null,
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source: null,
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language: null,
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problems: [],
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} satisfies ClassActivity)
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}
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const lesson = await classLessonProblems(user.className, CLASS_ACTIVITY_LOOKBACK_DAYS)
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const ids = lesson.problems.map((problem) => problem.id)
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// 代码提交和流程图提交两张表，互不依赖，一起查
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const [mine, drawn] = await Promise.all([
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ids.length
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? db
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.select({
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problemId: schema.submission.problemId,
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accepted: sql<boolean>`bool_or(${inArray(schema.submission.result, SOLVED_RESULTS)})`,
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})
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.from(schema.submission)
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.where(
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and(
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eq(schema.submission.userId, user.id),
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inArray(schema.submission.problemId, ids),
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isNull(schema.submission.contestId),
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// 布置的是 C：以前用 Python 做对过不算这份作业做完
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lessonLanguageFilter(lesson.language),
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),
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)
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.groupBy(schema.submission.problemId)
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: [],
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// 流程图作业：画到 A / S 也算做完（设计文档 2026-09-28-problem-page-redesign 第 3 节决定 6）。
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// 有的题流程图交了几百次、代码个位数，只看代码提交的话，这些学生在课堂条上永远是「没做」。
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// 交过就算「做过」，评分中、评失败的也算 —— 和代码提交编译错误也算「做过」同一个口径
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ids.length
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? db
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.select({
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problemId: schema.flowchartSubmission.problemId,
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passed: sql<boolean>`coalesce(bool_or(${FLOWCHART_PASSED}), false)`,
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})
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.from(schema.flowchartSubmission)
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.where(and(eq(schema.flowchartSubmission.userId, user.id), inArray(schema.flowchartSubmission.problemId, ids)))
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.groupBy(schema.flowchartSubmission.problemId)
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: [],
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])
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const mineById = new Map(mine.map((row) => [row.problemId, row.accepted]))
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for (const row of drawn) {
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mineById.set(row.problemId, (mineById.get(row.problemId) ?? false) || row.passed)
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}
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return success(c, {
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className: user.className,
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day: lesson.day,
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source: lesson.source,
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language: lesson.language,
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problems: lesson.problems.map((problem) => {
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const accepted = mineById.get(problem.id)
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return {
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problemDisplayId: problem.displayId,
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title: problem.title,
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userCount: problem.userCount,
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acceptedCount: problem.acceptedCount,
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myStatus: accepted === undefined ? 'none' : accepted ? 'accepted' : 'tried',
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} satisfies ClassActivityProblem
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}),
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} satisfies ClassActivity)
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})
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/**
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* 看板上的「最近几节课交了几节」：分清「今天没来」和「一直不动手」。2025 秋至少上过
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* 5 节课的学生里，12.5% 七成以上的课一道都没交，37% 的学生贡献了一半以上的「没交」
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* —— 当堂那份名单把这两种人排在同一行里，老师分不出来。
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*/
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const RECENT_LESSONS = 5
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/** 往回找最近几节课时最多看多远：寒暑假之后开学第一节课，前面几节是上学期的，没意义 */
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const RECENT_LESSONS_WINDOW_DAYS = 45
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/**
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* 课堂看板：这个班、今天、这节课的几道题 × 全班学生。老师在课上用它看谁还没开始、
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* 谁卡住了 —— 2025 秋平均每节课有 14 个平时在用的学生一道都没交（占三分之一），
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* 而交了 3 次以上还没过的平均不到 1 个，所以「还没开始」才是这张表的重点，排序在前端。
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*/
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classroomRoutes.get('/classroom/board', requireTeacher, async (c) => {
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const day = calendarDay()
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const className = c.req.query('className')?.trim() || (await suggestActiveClass())
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if (!className) {
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return success(c, {
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className: null,
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day,
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source: null,
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lessonId: null,
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language: null,
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assignedAt: null,
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assignedBy: null,
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lastLanguage: null,
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problems: [],
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students: [],
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recentLessons: 0,
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} satisfies ClassBoard)
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}
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// 推断只看今天（回看 1 天）：看板是给这节课用的，昨天的题不该冒出来。
|
||
// lastLanguage 给语言下拉当默认值：这个班上一次布置选的什么（一个班一般一学期只学一种）
|
||
const [lesson, [last]] = await Promise.all([
|
||
classLessonProblems(className, 1),
|
||
db
|
||
.select({ language: schema.classLesson.language })
|
||
.from(schema.classLesson)
|
||
.where(and(eq(schema.classLesson.className, className), isNotNull(schema.classLesson.language)))
|
||
.orderBy(desc(schema.classLesson.day), desc(schema.classLesson.createdAt))
|
||
.limit(1),
|
||
])
|
||
const ids = lesson.problems.map((problem) => problem.id)
|
||
const start = dayStart()
|
||
|
||
const roster = await db
|
||
.select({
|
||
userId: schema.user.id,
|
||
username: schema.user.username,
|
||
realName: schema.userProfile.realName,
|
||
})
|
||
.from(schema.user)
|
||
.leftJoin(schema.userProfile, eq(schema.userProfile.userId, schema.user.id))
|
||
.where(and(eq(schema.user.className, className), eq(schema.user.isDisabled, false), inArray(schema.user.adminType, [...STUDENT_ROLES])))
|
||
const userIds = roster.map((row) => row.userId)
|
||
|
||
// 最近几节课：这个班同学一起做题的那些天（不含今天）
|
||
const windowStart = dayStart(Date.now() - RECENT_LESSONS_WINDOW_DAYS * 86_400_000)
|
||
const recentDays = [...new Set((await classDayGroups(className, windowStart, { minUsers: CLASS_ACTIVITY_MIN_USERS })).map((row) => row.day))]
|
||
.filter((d) => d < day)
|
||
.sort()
|
||
.slice(-RECENT_LESSONS)
|
||
|
||
// 「来了几次」代码和流程图合起来数：那天只画了流程图的也算来过，和 recentDays 同一个口径
|
||
const recentActivity = activityRows({ since: windowStart, users: userIds })
|
||
const localDay = sql<string>`to_char(${localTime(recentActivity.createTime)}, 'YYYY-MM-DD')`
|
||
const [challengeConfigs, challengeDone] = await Promise.all([
|
||
ids.length ? db.select({ id: schema.problem.id, challenges: schema.problem.challenges }).from(schema.problem).where(inArray(schema.problem.id, ids)) : [],
|
||
challengeSuccessesOf(userIds, ids),
|
||
])
|
||
// 只认现在还配着的挑战：规则改过的旧 id 不算
|
||
const liveChallenges = new Map(challengeConfigs.map((row) => [row.id, new Set(Object.values(row.challenges ?? {}).flatMap((list) => list.map((c) => c.id)))]))
|
||
const challengeDoneKeys = new Set(
|
||
challengeDone.filter((row) => liveChallenges.get(row.problemId)?.has(row.challengeId)).map((row) => `${row.userId}:${row.problemId}`),
|
||
)
|
||
const [cells, lastSubmits, lastDrawn, attendance, drawn, todays, seen] = await Promise.all([
|
||
ids.length && userIds.length
|
||
? db
|
||
.select({
|
||
userId: schema.submission.userId,
|
||
problemId: schema.submission.problemId,
|
||
attempts: sql<number>`count(*) filter (where ${gte(schema.submission.createTime, start)})::int`,
|
||
firstAcceptedAt: sql<string | null>`min(${schema.submission.createTime}) filter (where ${inArray(schema.submission.result, SOLVED_RESULTS)})`,
|
||
})
|
||
.from(schema.submission)
|
||
.where(
|
||
and(
|
||
isNull(schema.submission.contestId),
|
||
inArray(schema.submission.userId, userIds),
|
||
inArray(schema.submission.problemId, ids),
|
||
lessonLanguageFilter(lesson.language),
|
||
),
|
||
)
|
||
.groupBy(schema.submission.userId, schema.submission.problemId)
|
||
: [],
|
||
userIds.length
|
||
? db
|
||
.select({
|
||
userId: schema.submission.userId,
|
||
lastAt: sql<string>`max(${schema.submission.createTime})`,
|
||
// 非比赛的最后一次，给「点名字跳提交列表」判断用（列表只列非比赛的）
|
||
lastPublicAt: sql<string | null>`max(${schema.submission.createTime}) filter (where ${isNull(schema.submission.contestId)})`,
|
||
})
|
||
.from(schema.submission)
|
||
.where(and(inArray(schema.submission.userId, userIds), gte(schema.submission.createTime, start)))
|
||
.groupBy(schema.submission.userId)
|
||
: [],
|
||
// 今天只画了流程图的学生，「最后一次提交」也得算上画图，不然他在看板上是一直没动手。
|
||
// 和上面代码那条同一个范围：今天、所有题、不论评没评完
|
||
userIds.length
|
||
? db
|
||
.select({
|
||
userId: schema.flowchartSubmission.userId,
|
||
lastAt: sql<string>`max(${schema.flowchartSubmission.createTime})`,
|
||
})
|
||
.from(schema.flowchartSubmission)
|
||
.where(and(inArray(schema.flowchartSubmission.userId, userIds), gte(schema.flowchartSubmission.createTime, start)))
|
||
.groupBy(schema.flowchartSubmission.userId)
|
||
: [],
|
||
recentDays.length && userIds.length
|
||
? db
|
||
.select({
|
||
userId: recentActivity.userId,
|
||
days: sql<number>`count(distinct ${localDay})::int`,
|
||
})
|
||
.from(recentActivity)
|
||
.where(inArray(localDay, recentDays))
|
||
.groupBy(recentActivity.userId)
|
||
: [],
|
||
/**
|
||
* 流程图作业：画到 A / S 也算这道题做完，和学生首页的课堂条同一个口径（/me/class-activity）。
|
||
* 有的题这节课整个班都在画流程图，只数代码提交的话，看板上满屏「没开始」。
|
||
* 和代码那条（cells）同一个范围：交过就算尝试，评分中、评失败的也算
|
||
*/
|
||
ids.length && userIds.length
|
||
? db
|
||
.select({
|
||
userId: schema.flowchartSubmission.userId,
|
||
problemId: schema.flowchartSubmission.problemId,
|
||
attempts: sql<number>`count(*) filter (where ${gte(schema.flowchartSubmission.createTime, start)})::int`,
|
||
firstPassedAt: sql<string | null>`min(${schema.flowchartSubmission.createTime}) filter (where ${FLOWCHART_PASSED})`,
|
||
})
|
||
.from(schema.flowchartSubmission)
|
||
.where(and(inArray(schema.flowchartSubmission.userId, userIds), inArray(schema.flowchartSubmission.problemId, ids)))
|
||
.groupBy(schema.flowchartSubmission.userId, schema.flowchartSubmission.problemId)
|
||
: [],
|
||
/**
|
||
* 每人每题今天交的每一次代码，从早到晚。最后一次给没做对的格子点开讲错误、按错法归堆，
|
||
* 整串给做对了的格子看轨迹。范围和 cells 一样（非比赛、布置的语言），只多一个「今天」
|
||
*/
|
||
ids.length && userIds.length
|
||
? db
|
||
.select({
|
||
userId: schema.submission.userId,
|
||
problemId: schema.submission.problemId,
|
||
id: schema.submission.id,
|
||
result: schema.submission.result,
|
||
createTime: schema.submission.createTime,
|
||
runtimeError: sql<StatisticInfo['runtime_error'] | null>`${schema.submission.statisticInfo}->'runtime_error'`,
|
||
sampleCheck: sql<StatisticInfo['sample_check'] | null>`${schema.submission.statisticInfo}->'sample_check'`,
|
||
})
|
||
.from(schema.submission)
|
||
.where(
|
||
and(
|
||
isNull(schema.submission.contestId),
|
||
inArray(schema.submission.userId, userIds),
|
||
inArray(schema.submission.problemId, ids),
|
||
gte(schema.submission.createTime, start),
|
||
lessonLanguageFilter(lesson.language),
|
||
),
|
||
)
|
||
.orderBy(schema.submission.createTime)
|
||
: [],
|
||
seenToday(userIds),
|
||
])
|
||
const todayByKey = Map.groupBy(todays, (row) => `${row.userId}:${row.problemId}`)
|
||
const cellByKey = new Map(cells.map((row) => [`${row.userId}:${row.problemId}`, row]))
|
||
const drawnByKey = new Map(drawn.map((row) => [`${row.userId}:${row.problemId}`, row]))
|
||
const lastByUser = new Map(lastSubmits.map((row) => [row.userId, row.lastAt]))
|
||
const codeTodayUsers = new Set(lastSubmits.filter((row) => row.lastPublicAt).map((row) => row.userId))
|
||
const drawnTodayUsers = new Set(lastDrawn.map((row) => row.userId))
|
||
for (const row of lastDrawn) {
|
||
const known = lastByUser.get(row.userId)
|
||
if (!known || Date.parse(row.lastAt) > Date.parse(known)) lastByUser.set(row.userId, row.lastAt)
|
||
}
|
||
const earliest = (a: string | null | undefined, b: string | null | undefined) => (!a ? (b ?? null) : !b ? a : Date.parse(a) <= Date.parse(b) ? a : b)
|
||
const attendedByUser = new Map(attendance.map((row) => [row.userId, row.days]))
|
||
|
||
return success(c, {
|
||
className,
|
||
day,
|
||
source: lesson.source,
|
||
lessonId: lesson.lessonId,
|
||
language: lesson.language,
|
||
assignedAt: lesson.assignedAt,
|
||
assignedBy: lesson.assignedBy,
|
||
lastLanguage: last?.language ?? null,
|
||
problems: lesson.problems.map((problem) => ({
|
||
problemId: problem.id,
|
||
problemDisplayId: problem.displayId,
|
||
title: problem.title,
|
||
isSql: problem.isSql,
|
||
hasChallenges: (liveChallenges.get(problem.id)?.size ?? 0) > 0,
|
||
})),
|
||
students: roster.map(
|
||
(student) =>
|
||
({
|
||
userId: student.userId,
|
||
username: student.username,
|
||
realName: student.realName ?? null,
|
||
cells: ids.map((id) => {
|
||
const key = `${student.userId}:${id}`
|
||
const cell = cellByKey.get(key)
|
||
const flow = drawnByKey.get(key)
|
||
const acceptedAt = earliest(cell?.firstAcceptedAt, flow?.firstPassedAt)
|
||
const today = todayByKey.get(key) ?? []
|
||
const latest = acceptedAt ? undefined : today.at(-1)
|
||
const firstTry = acceptedAt && Date.parse(acceptedAt) >= Date.parse(start) ? today.findIndex((row) => isAccepted(row.result)) : -1
|
||
return {
|
||
status: !cell && !flow ? 'none' : acceptedAt ? 'accepted' : 'tried',
|
||
attempts: (cell?.attempts ?? 0) + (flow?.attempts ?? 0),
|
||
codeAttempts: cell?.attempts ?? 0,
|
||
flowchartAttempts: flow?.attempts ?? 0,
|
||
acceptedAt,
|
||
latest: latest
|
||
? {
|
||
submissionId: latest.id,
|
||
result: latest.result,
|
||
runtimeError: latest.runtimeError ?? undefined,
|
||
sampleCheck: latest.sampleCheck ?? undefined,
|
||
}
|
||
: null,
|
||
trail: acceptedAt
|
||
? today.map((row) => ({
|
||
id: row.id,
|
||
result: row.result,
|
||
createTime: row.createTime,
|
||
}))
|
||
: [],
|
||
acceptedTry: firstTry >= 0 ? firstTry + 1 : null,
|
||
challenge:
|
||
!acceptedAt || !liveChallenges.get(id)?.size
|
||
? null
|
||
: challengeDoneKeys.has(key)
|
||
? 'done'
|
||
: today.some((row) => Date.parse(row.createTime) > Date.parse(acceptedAt))
|
||
? 'doing'
|
||
: null,
|
||
}
|
||
}),
|
||
lastSubmitAt: lastByUser.get(student.userId) ?? null,
|
||
codeToday: codeTodayUsers.has(student.userId),
|
||
drawnToday: drawnTodayUsers.has(student.userId),
|
||
recentAttended: attendedByUser.get(student.userId) ?? 0,
|
||
editing: presenceOf(student.userId)?.problemId ?? null,
|
||
online: seen.get(student.userId)?.online ?? false,
|
||
seenAt: seen.has(student.userId) ? new Date(seen.get(student.userId)!.at).toISOString() : null,
|
||
}) satisfies ClassBoardStudent,
|
||
),
|
||
recentLessons: recentDays.length,
|
||
} satisfies ClassBoard)
|
||
})
|
||
|
||
/**
|
||
* 老师首页「今天的课」：今天在上课的每个班一行。在上课 = 同班 ≥5 人今天一起交过题（和「班里在做」
|
||
* 同一个门槛），或者老师今天在看板上布置过题（刚布置、还没人交也要列出来）。每个班的题和人数
|
||
* 和看板同一套取法（classLessonProblems），「全做对」看这几道题做没做对过，不限今天
|
||
*/
|
||
classroomRoutes.get('/classroom/today', requireTeacher, async (c) => {
|
||
const start = dayStart()
|
||
const today = calendarDay()
|
||
const activity = activityRows({ since: start })
|
||
const users = sql<number>`count(distinct ${activity.userId})::int`
|
||
const lastAt = sql<string>`max(${activity.createTime})`
|
||
const [active, lessons] = await Promise.all([
|
||
db
|
||
.select({ className: schema.user.className, users, lastAt })
|
||
.from(activity)
|
||
.innerJoin(schema.user, eq(schema.user.id, activity.userId))
|
||
.where(and(isNotNull(schema.user.className), eq(schema.user.isDisabled, false), inArray(schema.user.adminType, [...STUDENT_ROLES])))
|
||
.groupBy(schema.user.className),
|
||
db.select({ className: schema.classLesson.className }).from(schema.classLesson).where(eq(schema.classLesson.day, today)),
|
||
])
|
||
const activeByClass = new Map(active.filter((row) => row.className && row.users >= CLASS_ACTIVITY_MIN_USERS).map((row) => [row.className!, row]))
|
||
const names = [...new Set([...activeByClass.keys(), ...lessons.map((row) => row.className)])]
|
||
|
||
const classes = await Promise.all(
|
||
names.map(async (className) => {
|
||
const [lesson, [roster]] = await Promise.all([
|
||
classLessonProblems(className, 1),
|
||
db
|
||
.select({ value: sql<number>`count(*)::int` })
|
||
.from(schema.user)
|
||
.where(and(eq(schema.user.className, className), eq(schema.user.isDisabled, false), inArray(schema.user.adminType, [...STUDENT_ROLES]))),
|
||
])
|
||
const ids = lesson.problems.map((problem) => problem.id)
|
||
let allDoneCount = 0
|
||
if (ids.length) {
|
||
// 做没做对不限今天（和看板的格子一样：以前做对的也算做完），语言跟着布置走
|
||
const done = activityRows({
|
||
since: new Date(0).toISOString(),
|
||
users: classMemberIds(className),
|
||
problemIds: ids,
|
||
language: lesson.language,
|
||
})
|
||
const rows = await db
|
||
.select({
|
||
userId: done.userId,
|
||
solved: sql<number>`count(distinct ${done.problemId})::int`,
|
||
})
|
||
.from(done)
|
||
.where(sql`${done.solved}`)
|
||
.groupBy(done.userId)
|
||
allDoneCount = rows.filter((row) => row.solved >= ids.length).length
|
||
}
|
||
const today = activeByClass.get(className)
|
||
return {
|
||
className,
|
||
source: lesson.source,
|
||
assignedAt: lesson.assignedAt,
|
||
assignedBy: lesson.assignedBy,
|
||
problems: lesson.problems.map((problem) => ({
|
||
problemDisplayId: problem.displayId,
|
||
title: problem.title,
|
||
userCount: problem.userCount,
|
||
acceptedCount: problem.acceptedCount,
|
||
})),
|
||
activeCount: today?.users ?? 0,
|
||
rosterCount: roster?.value ?? 0,
|
||
allDoneCount,
|
||
lastSubmitAt: today?.lastAt ? new Date(today.lastAt).toISOString() : null,
|
||
}
|
||
}),
|
||
)
|
||
// 正在交的在前，只布置了还没人交的放最后
|
||
classes.sort((a, b) => (b.lastSubmitAt ?? '').localeCompare(a.lastSubmitAt ?? ''))
|
||
return success(c, { classes } satisfies ClassToday)
|
||
})
|
||
|
||
/**
|
||
* 提交列表「这节课」按钮：这个班这节课是哪几道题，取法同课堂看板（老师布置的优先，
|
||
* 否则按今天同班提交推断）。不传班级就猜最近两小时在交题的班
|
||
*/
|
||
classroomRoutes.get('/classroom/lesson', requireTeacher, async (c) => {
|
||
const className = c.req.query('className')?.trim() || (await suggestActiveClass())
|
||
if (!className)
|
||
return success(c, {
|
||
className: null,
|
||
source: null,
|
||
language: null,
|
||
problems: [],
|
||
} satisfies ClassLesson)
|
||
// 和看板一样只回看今天：「这节课」不该冒出昨天的题
|
||
const lesson = await classLessonProblems(className, 1)
|
||
// C / Python 的作业夹了 SQL 题就不筛语言（见契约 classLessonSchema.language）
|
||
const mixed = lesson.problems.some((problem) => problem.isSql !== (lesson.language === 'SQL'))
|
||
return success(c, {
|
||
className,
|
||
source: lesson.source,
|
||
language: mixed ? null : lesson.language,
|
||
problems: lesson.problems.map((problem) => ({
|
||
problemDisplayId: problem.displayId,
|
||
title: problem.title,
|
||
})),
|
||
} satisfies ClassLesson)
|
||
})
|
||
|
||
/**
|
||
* 老师给这个班布置今天的一节课。按展示题号给、不分大小写，存 problem.id 并保留输入顺序；
|
||
* 有对不上的题号就整个拒掉并点名是哪几个，免得存下半张单子老师还不知道。空数组 = 清掉这一节，
|
||
* 今天一节都不剩时学生那边退回推断。改哪一节、还是新开一节，见契约 classLessonRequestSchema。
|
||
*/
|
||
classroomRoutes.put('/classroom/lesson', requireTeacher, async (c) => {
|
||
const parsed = await parseBody(c, classLessonRequestSchema, '题号或语言不对')
|
||
if (!parsed.success) return parsed.response
|
||
const user = c.get('user')!
|
||
const { className, problemDisplayIds, language, lessonId, newLesson } = parsed.data
|
||
const day = calendarDay()
|
||
|
||
const [exists] = await db.select({ id: schema.user.id }).from(schema.user).where(eq(schema.user.className, className)).limit(1)
|
||
if (!exists) return failure(c, 400, 'class-not-found', `没有 ${className} 这个班`)
|
||
// 改之前学生看到的那一节，改完比一比、告诉全班改了哪些
|
||
const before = await todayLessonSnapshot(className)
|
||
|
||
// 要改的是哪一行：点名的那一节（只认这个班今天的），新开一节就没有，老写法是今天最后布置的那一节
|
||
const [target] = newLesson
|
||
? []
|
||
: await db
|
||
.select({ id: schema.classLesson.id })
|
||
.from(schema.classLesson)
|
||
.where(
|
||
and(
|
||
eq(schema.classLesson.className, className),
|
||
eq(schema.classLesson.day, day),
|
||
lessonId === undefined ? undefined : eq(schema.classLesson.id, lessonId),
|
||
),
|
||
)
|
||
.orderBy(desc(schema.classLesson.createdAt), desc(schema.classLesson.id))
|
||
.limit(1)
|
||
if (!problemDisplayIds.length) {
|
||
if (target) await db.delete(schema.classLesson).where(eq(schema.classLesson.id, target.id))
|
||
await announceLessonChange(className, before)
|
||
return success(c, null)
|
||
}
|
||
|
||
const resolved = await resolveLessonProblems(problemDisplayIds, language)
|
||
if ('code' in resolved) return failure(c, 400, resolved.code, resolved.message)
|
||
const { problemIds } = resolved
|
||
const now = new Date().toISOString()
|
||
if (target) {
|
||
// 「改」不换布置的人，和 createdAt 一样认第一次
|
||
await db.update(schema.classLesson).set({ problemIds, language, updatedAt: now }).where(eq(schema.classLesson.id, target.id))
|
||
} else {
|
||
// 新开一节、今天还没有，或者点名的那一节已经没了（别的老师清掉了）—— 最后这种也照新开处理，
|
||
// 老师手上的题号不至于白填
|
||
await db.insert(schema.classLesson).values({
|
||
className,
|
||
day,
|
||
problemIds,
|
||
language,
|
||
createdBy: user.id,
|
||
createdAt: now,
|
||
updatedAt: now,
|
||
})
|
||
}
|
||
await announceLessonChange(className, before)
|
||
return success(c, null)
|
||
})
|