feat(流程图): 流程图画到 A / S 算这道题做完——题单进度、课堂条都认；加入题单之前画的图先藏起来

- 流程图评到 A 或 S，记进所有已加入、且包含这道题的题单（和判题那一路同一个口径，不看从哪个
  入口交的），徽章和题单类成就照样推送。原来题单进度只在判代码时记，流程图作业在题单里永远是
  「没做」。流程图提交的 id 进不了 problemset_submission（外键指向代码提交表），所以只写
  progress_detail —— 解锁旧提交的那道闸看的也是它
- 课堂条（/me/class-activity）的 myStatus：流程图 A / S 也算 accepted，评完的非 A/S 算 tried
- 题单防抄闸门补到流程图上：加入题单之前画的图，对本人藏起来（列表 showLink、详情 404、
  current / history 不数它），规则和代码提交同一份（problemSetJoinTimes 挪进 services/problemset）。
  原来加入之前画到 A 的那张图点一下就能载回画布、交上去就是 A
- 新增 GET /problems/:id/flowchart/scores：一次给出自己评完的每一次的分数和等级，外加被藏起来
  的次数（原来 history 一次只给一条，看分数走势得一页一页翻）
- 「A/S 算过关」和按分数定等级收进 flowchart/grade.ts；判题那边的记账 + 通知抽成
  recordSolvedAndNotify，两条路共用

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

apps/api/src/flowchart/grade.ts

@@ -0,0 +1,21 @@
+/**
+ * 流程图的等级。一律由分数推出来，不采信模型自报的 grade：提示词里写死了这四档，
+ * 但模型偶尔会给出 88 分配 S 级这种自相矛盾的结果，甚至直接吐「优秀」；脏值会一路
+ * 串到等级分布图和「A/S 才算过关」的判断里。
+ */
+export function gradeForScore(score: number) {
+  if (score >= 90) return "S"
+  if (score >= 80) return "A"
+  if (score >= 70) return "B"
+  return "C"
+}
+
+/**
+ * 画到这两档算这道题做完：题单进度、课堂条、「你画的流程图」都按它
+ * （设计文档 2026-09-28-problem-page-redesign 第 3 节决定 4、6）
+ */
+export const FLOWCHART_PASS_GRADES = ["S", "A"]
+
+export function isFlowchartPass(grade: string | null | undefined) {
+  return grade === "S" || grade === "A"
+}

apps/api/src/flowchart/run.ts

@@ -5,6 +5,8 @@ import { config } from "../config"
 import { db, schema } from "../db"
 import { publishFlowchartUpdate } from "../events"
 import { completeChat } from "../services/ai"
+import { recordSolvedAndNotify } from "../services/problemset"
+import { gradeForScore, isFlowchartPass } from "./grade"
 import type { FlowchartJobData } from "./job"
 
 function evaluationPrompt(problem: typeof schema.problem.$inferSelect) {
@@ -16,18 +18,6 @@ function evaluationPrompt(problem: typeof schema.problem.$inferSelect) {
 题目：${problem.title}\n${problem.description.slice(0, 2000)}`
 }
 
-/**
- * 等级一律由分数推出来，不采信模型自报的 grade。
- * 提示词里写死了这四档，但模型偶尔会给出 88 分配 S 级这种自相矛盾的结果，
- * 甚至直接吐「优秀」；脏值会一路串到等级分布图和「A/S 才展示流程图」的判断里。
- */
-function gradeForScore(score: number) {
-  if (score >= 90) return "S"
-  if (score >= 80) return "A"
-  if (score >= 70) return "B"
-  return "C"
-}
-
 function parseEvaluation(value: string) {
   const block = value.match(/```(?:json)?\s*([\s\S]*?)```/)?.[1]
   const json = block ?? value.match(/\{[\s\S]*\}/)?.[0]
@@ -89,6 +79,17 @@ export async function evaluateFlowchart(
         evaluationTime: new Date().toISOString(),
       })
       .where(eq(schema.flowchartSubmission.id, row.flowchart.id))
+    // 画到 A / S 算这道题做完，记进所有已加入、且包含这道题的题单 —— 和判题那一路
+    // 同一个口径（不看是从哪个入口交的）。放在推「评完了」之前：前端收到的时候进度已经
+    // 落库，1.5 秒后跳回题单页看到的就是新数据。比赛题不进题单
+    if (isFlowchartPass(result.grade) && row.problem.contestId === null) {
+      await recordSolvedAndNotify(
+        row.flowchart.userId,
+        row.problem.id,
+        null,
+        new Date().toISOString(),
+      )
+    }
     await publishFlowchartUpdate(row.flowchart.userId, {
       type: "flowchart_evaluation_completed",
       submissionId: row.flowchart.id,

apps/api/src/judge/run.ts

@@ -6,11 +6,8 @@ import { and, eq, inArray } from "drizzle-orm"
 import { config } from "../config"
 import { db, schema } from "../db"
 import { publishAchievementNotification } from "../events"
-import {
-  updateAchievementsForProblemSet,
-  updateAchievementsForSubmission,
-} from "../services/achievements"
-import { recordSolvedProblem } from "../services/problemset"
+import { updateAchievementsForSubmission } from "../services/achievements"
+import { recordSolvedAndNotify } from "../services/problemset"
 import { checkAst, type AstRule } from "./ast"
 import { publishSubmissionUpdate } from "./events"
 import { asRecord } from "../routes/helpers"
@@ -580,43 +577,12 @@ export async function judgeSubmission(job: JudgeJobData) {
     // 进度已经落库，跳回题单页看到的就是新数据。
     // 比赛题不进题单（题单加题时卡了 contestId IS NULL），跳过。
     if (row.submission.contestId === null && isAccepted(result)) {
-      try {
-        const { updated, earned } = await recordSolvedProblem(
+      await recordSolvedAndNotify(
         row.submission.userId,
         row.problem.id,
         row.submission.id,
         row.submission.createTime,
       )
-        if (earned.length > 0) {
-          await publishAchievementNotification(
-            row.submission.userId,
-            earned.map((badge) => ({
-              id: badge.id,
-              name: badge.name,
-              description: badge.description,
-              icon: badge.icon,
-              rarity: "bronze",
-              kind: "badge",
-            })),
-          )
-        }
-        if (updated > 0) {
-          const unlocked = await updateAchievementsForProblemSet(row.submission.userId)
-          await publishAchievementNotification(
-            row.submission.userId,
-            unlocked.map((achievement) => ({
-              id: achievement.id,
-              name: achievement.name,
-              description: achievement.description,
-              icon: achievement.icon,
-              rarity: achievement.rarity,
-              kind: "achievement",
-            })),
-          )
-        }
-      } catch (error) {
-        console.error(`Failed to record problem set progress for ${row.submission.id}`, error)
-      }
     }
 
     try {

apps/api/src/routes/classroom.ts

@@ -17,6 +17,7 @@ import { Hono } from "hono"
 import { requireAuth, requireTeacher, type AppEnv } from "../auth/middleware"
 import { db, schema } from "../db"
 import { failure, parseBody, success } from "../http"
+import { FLOWCHART_PASS_GRADES } from "../flowchart/grade"
 import { JudgeStatus } from "../judge/status"
 import { calendarDay, dayStart, localTime } from "../time"
 import { queryInteger, rounded } from "./helpers"
@@ -326,6 +327,29 @@ classroomRoutes.get("/me/class-activity", requireAuth, async (c) => {
     : []
   const mineById = new Map(mine.map((row) => [row.problemId, row.accepted]))
 
+  // 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）。
+  // 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」
+  const drawn = ids.length
+    ? await db
+        .select({
+          problemId: schema.flowchartSubmission.problemId,
+          passed: sql<boolean>`bool_or(${inArray(schema.flowchartSubmission.aiGrade, FLOWCHART_PASS_GRADES)})`,
+        })
+        .from(schema.flowchartSubmission)
+        .where(
+          and(
+            eq(schema.flowchartSubmission.userId, user.id),
+            inArray(schema.flowchartSubmission.problemId, ids),
+            // 只数评完了的：评分中、评失败的那次不算「做过」
+            eq(schema.flowchartSubmission.status, 2),
+          ),
+        )
+        .groupBy(schema.flowchartSubmission.problemId)
+    : []
+  for (const row of drawn) {
+    mineById.set(row.problemId, (mineById.get(row.problemId) ?? false) || row.passed)
+  }
+
   return success(c, {
     className: user.className,
     day: lesson.day,

apps/api/src/routes/flowchart.ts

@@ -5,6 +5,7 @@ import {
   type CreateFlowchartResponse,
   type FlowchartCurrent,
   type FlowchartDetail,
+  type FlowchartScores,
   type FlowchartList,
   type FlowchartListItem,
   type FlowchartStatistics,
@@ -14,11 +15,13 @@ import { and, asc, count, desc, eq, inArray, isNull, sql, type SQL } from "drizz
 import { Hono } from "hono"
 
 import { requireAuth, requireTeacher, type AppEnv } from "../auth/middleware"
+import type { AuthUser } from "../auth/session"
 import { config } from "../config"
 import { db, schema } from "../db"
 import { failure, readJson, success } from "../http"
 import { flowchartQueue } from "../queue"
 import { getBooleanOption } from "../services/options"
+import { problemSetJoinTimes } from "../services/problemset"
 import { consumeToken } from "../services/throttling"
 import { buildWordFrequencies } from "../services/word-frequency"
 import { dayStart } from "../time"
@@ -38,14 +41,38 @@ function flowchartThrottleKey(userId: number) {
   return `flowchart:${userId}`
 }
 
-function canView(
-  user: import("../auth/session").AuthUser,
-  row: { userId: number },
-  problem: { createdById: number },
+/**
+ * 题单防抄：学生加入含这道题的题单之前画的图，先对他本人藏起来 —— 和代码提交同一道闸
+ * （routes/submission.ts 的 canViewSubmission，规则见 problemSetJoinTimes）。原来流程图
+ * 这边没有这一条，加入题单之前画到 A 的那张图点一下就能载回画布，交上去就是 A。
+ */
+function hiddenByProblemSet(
+  user: AuthUser,
+  row: { userId: number; problemId: number; createTime: string },
+  joinTimes: Map<number, string>,
 ) {
+  if (row.userId !== user.id || isAdminRole(user)) return false
+  const joinTime = joinTimes.get(row.problemId)
+  return joinTime !== undefined && Date.parse(row.createTime) < Date.parse(joinTime)
+}
+
+function canView(
+  user: AuthUser,
+  row: { userId: number; problemId: number; createTime: string },
+  problem: { createdById: number },
+  joinTimes: Map<number, string>,
+) {
+  if (hiddenByProblemSet(user, row, joinTimes)) return false
   return row.userId === user.id || isAdminRole(user) || problem.createdById === user.id
 }
 
+/** 只有学生看自己的提交时才需要查题单；其余情况给一张空表，省一次查询 */
+function joinTimesFor(user: AuthUser, rows: Array<{ userId: number; problemId: number }>) {
+  if (isAdminRole(user)) return Promise.resolve(new Map<number, string>())
+  const own = rows.filter((row) => row.userId === user.id).map((row) => row.problemId)
+  return problemSetJoinTimes(user.id, [...new Set(own)])
+}
+
 function flowchartData(
   flowchart: typeof schema.flowchartSubmission.$inferSelect,
   username: string,
@@ -188,8 +215,9 @@ async function flowchartUserFilter(username: string) {
 const flowchartListColumns = {
   flowchart: {
     id: schema.flowchartSubmission.id,
-    // showLink 判定要，序列化本身用不到
+    // showLink 判定要（本人 + 题单闸门），序列化本身用不到
     userId: schema.flowchartSubmission.userId,
+    problemId: schema.flowchartSubmission.problemId,
     status: schema.flowchartSubmission.status,
     createTime: schema.flowchartSubmission.createTime,
     aiScore: schema.flowchartSubmission.aiScore,
@@ -250,6 +278,10 @@ flowchartRoutes.get("/flowcharts", requireAuth, async (c) => {
       .limit(limit)
       .offset(offset),
   ])
+  const joinTimes = await joinTimesFor(
+    user,
+    rows.map((row) => row.flowchart),
+  )
   return success(c, {
     results: rows.map(
       ({ flowchart, username, problem }) =>
@@ -266,7 +298,7 @@ flowchartRoutes.get("/flowcharts", requireAuth, async (c) => {
           aiModel: flowchart.aiModel,
           processingTime: flowchart.processingTime,
           evaluationTime: flowchart.evaluationTime,
-          showLink: canView(user, flowchart, problem),
+          showLink: canView(user, flowchart, problem, joinTimes),
         }) satisfies FlowchartListItem,
     ),
     total: totalRows[0]?.value ?? 0,
@@ -514,7 +546,8 @@ flowchartRoutes.get("/flowcharts/:id", requireAuth, async (c) => {
     .innerJoin(schema.problem, eq(schema.flowchartSubmission.problemId, schema.problem.id))
     .where(eq(schema.flowchartSubmission.id, c.req.param("id")))
     .limit(1)
-  if (!row || !canView(c.get("user")!, row.flowchart, row.problem))
+  const user = c.get("user")!
+  if (!row || !canView(user, row.flowchart, row.problem, await joinTimesFor(user, [row.flowchart])))
     return failure(c, 404, "flowchart-not-found", "Submission does not exist")
   return success(c, flowchartData(row.flowchart, row.username))
 })
@@ -527,7 +560,7 @@ flowchartRoutes.post("/flowcharts/:id/retry", requireAuth, async (c) => {
     .innerJoin(schema.problem, eq(schema.flowchartSubmission.problemId, schema.problem.id))
     .where(eq(schema.flowchartSubmission.id, c.req.param("id")))
     .limit(1)
-  if (!row || !canView(user, row.flowchart, row.problem))
+  if (!row || !canView(user, row.flowchart, row.problem, await joinTimesFor(user, [row.flowchart])))
     return failure(c, 404, "flowchart-not-found", "Submission does not exist")
   if (![2, 3].includes(row.flowchart.status))
     return failure(c, 409, "retry-not-allowed", "Submission is not in a state that allows retry")
@@ -582,33 +615,13 @@ flowchartRoutes.post("/flowcharts/:id/retry", requireAuth, async (c) => {
   } satisfies CreateFlowchartResponse)
 })
 
-flowchartRoutes.get("/problems/:id/flowchart/current", requireAuth, async (c) => {
-  const problemId = queryInteger(c.req.param("id"), 0, { min: 1 })
-  const rows = await db
-    .select({
-      score: schema.flowchartSubmission.aiScore,
-      grade: schema.flowchartSubmission.aiGrade,
-    })
-    .from(schema.flowchartSubmission)
-    .where(
-      and(
-        eq(schema.flowchartSubmission.userId, c.get("user")!.id),
-        eq(schema.flowchartSubmission.problemId, problemId),
-        eq(schema.flowchartSubmission.status, 2),
-      ),
-    )
-    .orderBy(desc(schema.flowchartSubmission.createTime))
-  return success(c, {
-    count: rows.length,
-    score: rows[0]?.score ?? 0,
-    grade: rows[0]?.grade ?? "",
-  } satisfies FlowchartCurrent)
-})
-
-flowchartRoutes.get("/problems/:id/flowchart/history", requireAuth, async (c) => {
-  const problemId = queryInteger(c.req.param("id"), 0, { min: 1 })
-  const page = queryInteger(c.req.query("page"), 0, { min: 0 })
-  const rows = await db
+/**
+ * 自己在这道题上评完的每一次，按时间从早到晚，已经滤掉加入题单之前的（题单闸门）。
+ * current / history / scores 三个接口都从这一份出。
+ */
+async function myEvaluatedFlowcharts(user: AuthUser, problemId: number) {
+  const [rows, joinTimes] = await Promise.all([
+    db
       .select({
         flowchart: schema.flowchartSubmission,
         username: schema.user.username,
@@ -617,12 +630,33 @@ flowchartRoutes.get("/problems/:id/flowchart/history", requireAuth, async (c) =>
       .innerJoin(schema.user, eq(schema.flowchartSubmission.userId, schema.user.id))
       .where(
         and(
-        eq(schema.flowchartSubmission.userId, c.get("user")!.id),
+          eq(schema.flowchartSubmission.userId, user.id),
           eq(schema.flowchartSubmission.problemId, problemId),
           eq(schema.flowchartSubmission.status, 2),
         ),
       )
-    .orderBy(asc(schema.flowchartSubmission.createTime))
+      .orderBy(asc(schema.flowchartSubmission.createTime)),
+    joinTimesFor(user, [{ userId: user.id, problemId }]),
+  ])
+  const visible = rows.filter((row) => !hiddenByProblemSet(user, row.flowchart, joinTimes))
+  return { visible, hidden: rows.length - visible.length }
+}
+
+flowchartRoutes.get("/problems/:id/flowchart/current", requireAuth, async (c) => {
+  const problemId = queryInteger(c.req.param("id"), 0, { min: 1 })
+  const { visible } = await myEvaluatedFlowcharts(c.get("user")!, problemId)
+  const latest = visible.at(-1)?.flowchart
+  return success(c, {
+    count: visible.length,
+    score: latest?.aiScore ?? 0,
+    grade: latest?.aiGrade ?? "",
+  } satisfies FlowchartCurrent)
+})
+
+flowchartRoutes.get("/problems/:id/flowchart/history", requireAuth, async (c) => {
+  const problemId = queryInteger(c.req.param("id"), 0, { min: 1 })
+  const page = queryInteger(c.req.query("page"), 0, { min: 0 })
+  const { visible: rows } = await myEvaluatedFlowcharts(c.get("user")!, problemId)
   const selected = page === 0 ? rows.at(-1) : rows[page - 1]
   if (page > rows.length) return failure(c, 400, "page-out-of-range", "Page out of range")
   return success(c, {
@@ -630,3 +664,21 @@ flowchartRoutes.get("/problems/:id/flowchart/history", requireAuth, async (c) =>
     count: rows.length,
   } satisfies FlowchartDetail)
 })
+
+/**
+ * 历次分数：结果页签上那一排「第 N 次 xx 分」。原来 history 一次只给一条，
+ * 要看分数走势得一页一页翻。`hidden` 是被题单闸门藏起来的次数，界面上给一句说明。
+ */
+flowchartRoutes.get("/problems/:id/flowchart/scores", requireAuth, async (c) => {
+  const problemId = queryInteger(c.req.param("id"), 0, { min: 1 })
+  const { visible, hidden } = await myEvaluatedFlowcharts(c.get("user")!, problemId)
+  return success(c, {
+    scores: visible.map(({ flowchart }) => ({
+      id: flowchart.id,
+      score: flowchart.aiScore ?? 0,
+      grade: flowchart.aiGrade ?? "",
+      createTime: flowchart.createTime,
+    })),
+    hidden,
+  } satisfies FlowchartScores)
+})

apps/api/src/routes/submission.ts

@@ -10,7 +10,7 @@ import {
   type SubmissionListItem,
   type SubmissionTrace,
 } from "@oj2/contract"
-import { and, count, desc, eq, gt, inArray, isNull, or, sql, type SQL } from "drizzle-orm"
+import { and, count, desc, eq, inArray, isNull, sql, type SQL } from "drizzle-orm"
 import { Hono } from "hono"
 
 import { optionalAuth, requireAuth, requireSuperAdmin } from "../auth/middleware"
@@ -28,6 +28,7 @@ import {
 } from "../services/contest"
 import { CodeFormatError, formatCode } from "../services/format-code"
 import { getBooleanOption } from "../services/options"
+import { problemSetJoinTimes } from "../services/problemset"
 import { consumeToken } from "../services/throttling"
 import { dayStart } from "../time"
 import { asFilterValue, asRecord, isAdminRole, queryInteger } from "./helpers"
@@ -248,53 +249,6 @@ submissionRoutes.post("/code/format", requireAuth, async (c) => {
   }
 })
 
-/**
- * 题单防作弊闸门：查出这些题目里，哪些题的旧提交要对该用户藏起来，返回 problemId → 加入时间。
- *
- * 对齐旧后端 `submission/serializers.py:12` 的 `bulk_fetch_problemset_progress`。学生加入含
- * 某道题的题单后，他在加入之前留下的 AC 代码还摆在提交列表里，复制粘贴就能把题单刷完。
- * 备份快照里 1734 人次、188 名学生进过这个窗口（占已解题次的 22.5%），不是边角情况。
- *
- * 解锁的三条路全写在 where 里，任一成立就查不出来、也就不遮挡：
- *   - 已经在题单里做出这道题（progress_detail 里有这道题的 key）
- *   - 题单过了截止时间（end_time；为空表示不设期限，只能靠做出来解锁）
- *   - 题单被归档（status 不是 active）
- *
- * 一道题可能同时落在多个已加入的题单里，取最晚的 join_time——「存在任一题单要求遮挡就遮挡」
- * 等价于「提交时间早于最晚的那次加入」。旧后端这里用 `.first()` 取任意一条，一题多题单时
- * 行为不确定，换成聚合顺手定死。
- */
-async function problemSetJoinTimes(userId: number, problemIds: number[]) {
-  const joinTimes = new Map<number, string>()
-  if (problemIds.length === 0) return joinTimes
-  const rows = await db
-    .select({
-      problemId: schema.problemsetProblem.problemId,
-      // 聚合表达式不走列的类型映射，但 OID 还是 1184 —— db/index.ts 给这个 OID 挂了
-      // 「转成 ISO 8601」的 parser，所以这里拿到的和 `mode:"string"` 的列同形状。
-      // 原来那个 `::text` 要撤掉：它的 OID 是 25、绕过那个 parser，反而会变成 PG 文本。
-      joinTime: sql<string>`max(${schema.problemsetProgress.joinTime})`,
-    })
-    .from(schema.problemsetProgress)
-    .innerJoin(schema.problemset, eq(schema.problemset.id, schema.problemsetProgress.problemsetId))
-    .innerJoin(
-      schema.problemsetProblem,
-      eq(schema.problemsetProblem.problemsetId, schema.problemset.id),
-    )
-    .where(
-      and(
-        eq(schema.problemsetProgress.userId, userId),
-        inArray(schema.problemsetProblem.problemId, problemIds),
-        eq(schema.problemset.status, "active"),
-        or(isNull(schema.problemset.endTime), gt(schema.problemset.endTime, sql`now()`)),
-        sql`not jsonb_exists(${schema.problemsetProgress.progressDetail}, ${schema.problemsetProblem.problemId}::text)`,
-      ),
-    )
-    .groupBy(schema.problemsetProblem.problemId)
-  for (const row of rows) joinTimes.set(row.problemId, row.joinTime)
-  return joinTimes
-}
-
 // 参数按「实际用到的字段」声明，而不是整行 $inferSelect：列表接口只 select 需要的列，
 // 传不进完整行。完整行在结构上满足这两个窄类型，详情接口照旧调用不受影响。
 function canViewSubmission(

apps/api/src/services/problemset.ts

@@ -1,7 +1,9 @@
-import { and, eq, notInArray, sql } from "drizzle-orm"
+import { and, eq, gt, inArray, isNull, notInArray, or, sql } from "drizzle-orm"
 
 import { db, schema } from "../db"
+import { publishAchievementNotification } from "../events"
 import { asRecord } from "../routes/helpers"
+import { updateAchievementsForProblemSet } from "./achievements"
 
 type BadgeRow = typeof schema.problemsetBadge.$inferSelect
 type ProgressRow = typeof schema.problemsetProgress.$inferSelect
@@ -238,7 +240,12 @@ export async function resyncProgress(problemsetId: number) {
 export async function recordSolvedProblem(
   userId: number,
   problemId: number,
-  submissionId: string,
+  /**
+   * 做出来的那次代码提交。流程图画到 A/S 算完成时传 null：problemset_submission.submission_id
+   * 外键指向代码提交表，流程图提交的 id 进不去。不影响「解锁加入题单之前的提交」——
+   * 那道闸看的是 progress_detail（routes/submission.ts 的 problemSetJoinTimes）
+   */
+  submissionId: string | null,
   solvedAt: string,
 ) {
   const joined = await db
@@ -281,7 +288,7 @@ export async function recordSolvedProblem(
           ),
         )
         .limit(1)
-      if (!existing) {
+      if (!existing && submissionId !== null) {
         await tx
           .insert(schema.problemsetSubmission)
           .values({ problemsetId, userId, submissionId, problemId })
@@ -334,3 +341,99 @@ export async function recordSolvedProblem(
   }
   return { updated, earned }
 }
+
+/**
+ * 记题单进度，并把这一下拿到的徽章、解锁的题单类成就推给学生。判题（judge/run.ts）和
+ * 流程图评分（flowchart/run.ts）两条路都在「这道题做完了」的那一刻调它。
+ * 记账失败不往外抛：判题 / 评分本身已经落库，不能因为进度没记上就把整次判题算失败。
+ */
+export async function recordSolvedAndNotify(
+  userId: number,
+  problemId: number,
+  submissionId: string | null,
+  solvedAt: string,
+) {
+  try {
+    const { updated, earned } = await recordSolvedProblem(userId, problemId, submissionId, solvedAt)
+    if (earned.length > 0) {
+      await publishAchievementNotification(
+        userId,
+        earned.map((badge) => ({
+          id: badge.id,
+          name: badge.name,
+          description: badge.description,
+          icon: badge.icon,
+          rarity: "bronze",
+          kind: "badge",
+        })),
+      )
+    }
+    if (updated > 0) {
+      const unlocked = await updateAchievementsForProblemSet(userId)
+      await publishAchievementNotification(
+        userId,
+        unlocked.map((achievement) => ({
+          id: achievement.id,
+          name: achievement.name,
+          description: achievement.description,
+          icon: achievement.icon,
+          rarity: achievement.rarity,
+          kind: "achievement",
+        })),
+      )
+    }
+  } catch (error) {
+    console.error(
+      `Failed to record problem set progress for user ${userId} problem ${problemId}`,
+      error,
+    )
+  }
+}
+
+/**
+ * 题单防作弊闸门：查出这些题目里，哪些题的旧提交要对该用户藏起来，返回 problemId → 加入时间。
+ * 代码提交（routes/submission.ts）和流程图提交（routes/flowchart.ts）共用这一道闸。
+ *
+ * 对齐旧后端 `submission/serializers.py:12` 的 `bulk_fetch_problemset_progress`。学生加入含
+ * 某道题的题单后，他在加入之前留下的 AC 代码还摆在提交列表里，复制粘贴就能把题单刷完。
+ * 备份快照里 1734 人次、188 名学生进过这个窗口（占已解题次的 22.5%），不是边角情况。
+ *
+ * 解锁的三条路全写在 where 里，任一成立就查不出来、也就不遮挡：
+ *   - 已经在题单里做出这道题（progress_detail 里有这道题的 key）
+ *   - 题单过了截止时间（end_time；为空表示不设期限，只能靠做出来解锁）
+ *   - 题单被归档（status 不是 active）
+ *
+ * 一道题可能同时落在多个已加入的题单里，取最晚的 join_time——「存在任一题单要求遮挡就遮挡」
+ * 等价于「提交时间早于最晚的那次加入」。旧后端这里用 `.first()` 取任意一条，一题多题单时
+ * 行为不确定，换成聚合顺手定死。
+ */
+export async function problemSetJoinTimes(userId: number, problemIds: number[]) {
+  const joinTimes = new Map<number, string>()
+  if (problemIds.length === 0) return joinTimes
+  const rows = await db
+    .select({
+      problemId: schema.problemsetProblem.problemId,
+      // 聚合表达式不走列的类型映射，但 OID 还是 1184 —— db/index.ts 给这个 OID 挂了
+      // 「转成 ISO 8601」的 parser，所以这里拿到的和 `mode:"string"` 的列同形状。
+      // 原来那个 `::text` 要撤掉：它的 OID 是 25、绕过那个 parser，反而会变成 PG 文本。
+      joinTime: sql<string>`max(${schema.problemsetProgress.joinTime})`,
+    })
+    .from(schema.problemsetProgress)
+    .innerJoin(schema.problemset, eq(schema.problemset.id, schema.problemsetProgress.problemsetId))
+    .innerJoin(
+      schema.problemsetProblem,
+      eq(schema.problemsetProblem.problemsetId, schema.problemset.id),
+    )
+    .where(
+      and(
+        eq(schema.problemsetProgress.userId, userId),
+        inArray(schema.problemsetProblem.problemId, problemIds),
+        eq(schema.problemset.status, "active"),
+        or(isNull(schema.problemset.endTime), gt(schema.problemset.endTime, sql`now()`)),
+        sql`not jsonb_exists(${schema.problemsetProgress.progressDetail}, ${schema.problemsetProblem.problemId}::text)`,
+      ),
+    )
+    .groupBy(schema.problemsetProblem.problemId)
+  for (const row of rows) joinTimes.set(row.problemId, row.joinTime)
+  return joinTimes
+}

packages/contract/src/flowchart.ts

@@ -73,6 +73,19 @@ export const flowchartDetailSchema = z.object({
   count: z.number().int(),
 })
 
+/** 自己在一道题上评完的历次分数，早的在前；hidden = 被题单闸门藏起来的次数 */
+export const flowchartScoresSchema = z.object({
+  scores: z.array(
+    z.object({
+      id: z.string(),
+      score: z.number(),
+      grade: z.string(),
+      createTime: z.string(),
+    }),
+  ),
+  hidden: z.number().int(),
+})
+
 export const flowchartStatisticsSchema = z.object({
   totalCount: z.number().int(),
   avgScore: z.number(),
@@ -107,6 +120,7 @@ export type FlowchartListItem = z.infer<typeof flowchartListItemSchema>
 export type FlowchartList = z.infer<typeof flowchartListSchema>
 export type FlowchartCurrent = z.infer<typeof flowchartCurrentSchema>
 export type FlowchartDetail = z.infer<typeof flowchartDetailSchema>
+export type FlowchartScores = z.infer<typeof flowchartScoresSchema>
 export type CreateFlowchartResponse = z.infer<typeof createFlowchartResponseSchema>
 export type CreateFlowchartRequest = z.infer<typeof createFlowchartRequestSchema>