AI 时代 OJ 设计的第 1 步:给「可信 AC」和学情分析攒数据,本身不判任何事。 - 契约:提交请求加可选的 trace(活跃时长、键入/粘贴/删除字符数、切后台次数等, 只有计数、不含按键内容);写成 .optional().catch(undefined),坏了就当没带, 不让附带数据把提交挡成 400 - 迁移 0016 建 submission_trace,与 submission 一对一、CASCADE;since_prev_ms 由服务端在同一条 INSERT 里算(排掉自身),bigint —— 实测已有 44 天的间隔,int4 装不下 - 后端写 trace 失败只记日志,不影响提交 - 前端 oj/problem/utils/editTrace.ts 是模块单例(扩展对象不能过 Pinia 的响应式代理), 只数带 userEvent 的事务:格式化回写 / 载入草稿 / 协作对方的改动天然排除; closeBrackets 越过右括号时是原样替换,按 no-op 跳过。比赛编辑器同样挂上 - 实跑:后端四种请求、前端浏览器里键入/粘贴/删除/setCode 回写/切后台/提交后清零, 计数与预期逐项一致 Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
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@@ -8,6 +8,7 @@ import {
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type SubmissionDetail,
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type SubmissionList,
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type SubmissionListItem,
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type SubmissionTrace,
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} from "@oj2/contract"
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import {
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and,
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@@ -59,6 +60,38 @@ function objectValue(value: unknown): Record<string, unknown> {
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: {}
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}
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/**
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* 落编辑过程信号。**失败只记日志、不影响提交** —— 这是附带的统计数据,
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* 提交已经进库了,不能因为它回一个 500 让学生以为没交上。
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*
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* `since_prev_ms` 在同一条 INSERT 里用子查询算,排掉刚插进去的这条自己;
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* 两次提交并发到达时也各自取到的是对方之外的最近一条。这道题第一次提交时
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* `max()` 为 null,列就是 null。
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*/
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async function saveTrace(
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submissionId: string,
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userId: number,
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problemId: number,
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createTime: string,
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trace: SubmissionTrace,
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) {
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try {
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await db.insert(schema.submissionTrace).values({
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submissionId,
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...trace,
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sincePrevMs: sql`(
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select (extract(epoch from ${createTime}::timestamptz - max(${schema.submission.createTime})) * 1000)::bigint
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from ${schema.submission}
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where ${schema.submission.userId} = ${userId}
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and ${schema.submission.problemId} = ${problemId}
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and ${schema.submission.id} <> ${submissionId}
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)`,
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})
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} catch (error) {
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console.error("Failed to record submission trace", error)
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}
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}
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submissionRoutes.post("/submissions", requireAuth, async (c) => {
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const parsed = createSubmissionRequestSchema.safeParse(
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await c.req.json().catch(() => null),
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@@ -168,6 +201,15 @@ submissionRoutes.post("/submissions", requireAuth, async (c) => {
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contestId,
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})
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if (parsed.data.trace)
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await saveTrace(
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submissionId,
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user.id,
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problem.id,
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createTime,
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parsed.data.trace,
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)
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try {
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await judgeQueue.add(
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"judge",
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