上一版让模型拿例子在图上「走一遍」，真模型一试：同一张错图两次一次全对一次 C （看得到应该输出时它会照抄），365 圈的循环多算一圈也判对。现在： - 结构照学生的结构树拼，AI 只把每个框里的字翻成一句 Python，改不了结构、补不了漏的步骤 - 拼好的程序在本站判题机上跑例子和测试数据，逐行比输出：空格、标点、全角半角不算错， 题目输出里固定的提示文字（「较大的数是: 」）框里没写也不算错 - 走过哪些框、每行是哪个框输出的在程序里记下来，画布照旧亮路径、标出错的框 - 没走对的原因由代码说：多输出了一行「一级果」、输出的是 38.16 应该是 37.78、 「输入有无瑕疵 f」读到的数据不对、走不到结束（死循环） - 结构树挪进契约（flowchart-doc.ts），前端画图、后端评分用同一份 用真模型（deepseek-v4-flash）对 9 张图各评两次，结果两次一致、对错都判对，每张一秒左右。 Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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/**
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* 流程图的数据：一棵结构树，不是「一堆框 + 一堆线」。前端画、后端评分都按它。
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*
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* 原来的编辑器（vue-flow）存的是自由摆放的节点和学生手拉的连线，能画出断线、孤立的框、
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* 一个「是」连出去三根线 —— 学生大半时间花在拖框、对连接点、理线上。现在只有三种结构：
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* 顺序、判断（是 / 否两路，走完合回来）、循环（当型，条件成立就走一遍循环体再回来判断），
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* 「开始」「结束」固定在两头不进数据。画不出来的只有乱跳的线，中职教的三种结构都画得出。
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*
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* 存进数据库（flowchart_submission.flowchart_data，压缩过）和本地草稿的都是 FlowDoc。
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* 2026-10 之前的提交存的是 vue-flow 的 nodes / edges，parseDoc 认不出来就是 null ——
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* 那些只能看 Mermaid 渲染出来的图，载不回画布，评分也只能退回老办法。
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*/
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export type BoxKind = "input" | "output" | "process"
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export type StepKind = BoxKind | "if" | "while"
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interface StepBase {
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id: string
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text: string
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}
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export type BoxStep = StepBase & { kind: BoxKind }
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export type IfStep = StepBase & { kind: "if"; yes: FlowStep[]; no: FlowStep[] }
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export type WhileStep = StepBase & { kind: "while"; body: FlowStep[] }
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export type FlowStep = BoxStep | IfStep | WhileStep
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export interface FlowDoc {
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version: 2
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steps: FlowStep[]
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}
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/** 开始、结束在画布上的 id（它们不进数据） */
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export const FLOW_START_ID = "__start"
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export const FLOW_END_ID = "__end"
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export function flowChildren(step: FlowStep): FlowStep[][] {
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if (step.kind === "if") return [step.yes, step.no]
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if (step.kind === "while") return [step.body]
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return []
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}
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/** 还没写字的框有几个 */
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export function countBlankSteps(steps: FlowStep[]): number {
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return steps.reduce(
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(sum, step) =>
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sum +
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(step.text.trim() ? 0 : 1) +
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flowChildren(step).reduce((n, c) => n + countBlankSteps(c), 0),
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0,
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)
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}
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/** 一张图「长什么样」，不带 id：载回旧版、和交过的那一版比，只看结构和字 */
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export function flowSignature(doc: FlowDoc): string {
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const strip = (steps: FlowStep[]): unknown[] =>
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steps.map((step) => [step.kind, step.text.trim(), ...flowChildren(step).map(strip)])
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return JSON.stringify(strip(doc.steps))
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}
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// ==================== 读回来的数据 ====================
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const KINDS = new Set<string>(["input", "output", "process", "if", "while"])
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function parseSteps(raw: unknown, prefix: string): FlowStep[] | null {
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if (!Array.isArray(raw)) return null
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const out: FlowStep[] = []
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for (const [index, item] of raw.entries()) {
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if (!item || typeof item !== "object") return null
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const step = item as Record<string, unknown>
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const kind = step.kind
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if (typeof kind !== "string" || !KINDS.has(kind)) return null
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const id = typeof step.id === "string" && step.id ? step.id : `${prefix}${index}`
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const text = typeof step.text === "string" ? step.text : ""
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if (kind === "if") {
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const yes = parseSteps(step.yes ?? [], `${id}y`)
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const no = parseSteps(step.no ?? [], `${id}n`)
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if (!yes || !no) return null
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out.push({ id, text, kind, yes, no })
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} else if (kind === "while") {
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const body = parseSteps(step.body ?? [], `${id}b`)
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if (!body) return null
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out.push({ id, text, kind, body })
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} else {
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out.push({ id, text, kind: kind as BoxKind })
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}
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}
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return out
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}
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/** 本地草稿、交过的某一版：是新格式就读出来，旧的 vue-flow 格式或者坏数据给 null */
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export function parseFlowDoc(raw: unknown): FlowDoc | null {
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if (!raw || typeof raw !== "object") return null
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const data = raw as Record<string, unknown>
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if (data.version !== 2) return null
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const steps = parseSteps(data.steps, "p")
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return steps ? { version: 2, steps } : null
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}
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// ==================== Mermaid ====================
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/**
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* Mermaid 里第 n 个框（nN）是哪一步：开始、各步按先序（判断先「是」再「否」）、结束。
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* 和 flowToMermaid 建框的顺序一致 —— 评分报的是 nN，前端靠它在画布上亮出路径
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*/
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export function mermaidOrder(doc: FlowDoc): string[] {
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const order = [FLOW_START_ID]
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const walk = (steps: FlowStep[]) => {
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for (const step of steps) {
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order.push(step.id)
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for (const child of flowChildren(step)) walk(child)
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}
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}
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walk(doc.steps)
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order.push(FLOW_END_ID)
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return order
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}
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/**
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* 学生敲的字直接塞进 "..."，一个双引号就会把语法撑破：坏掉的代码还会原样送去打分，
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* 学生不知道扣分是因为一个引号。`#` 必须先转，否则本来就有的 `#quot;` 会被当成实体。
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*/
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function escapeLabel(raw: string) {
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return raw.replace(/#/g, "#35;").replace(/"/g, "#quot;").replace(/\r?\n/g, "<br/>")
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}
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/**
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* 结果页签和提交列表里的缩略图、老的四项分评法用的都是这份 Mermaid。
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*
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* 形状照国标流程图：起止是圆角跑道、输入输出是平行四边形、处理是矩形、判断是菱形。
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* class 行留着给前端 useMermaid 上色；classDef 不写 —— 颜色是渲染那边的事。
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*/
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export function flowToMermaid(doc: FlowDoc): string {
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const lines: string[] = ["flowchart TD"]
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const classes: string[] = []
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let n = 0
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const node = (shape: (label: string) => string, text: string, cls: string) => {
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const id = `n${n++}`
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lines.push(` ${id}${shape(escapeLabel(text.trim() || " "))}`)
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classes.push(` class ${id} ${cls}`)
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return id
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}
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/** 还没接上下一步的出口：从哪个框出来、线上写什么 */
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type Exit = { from: string; label?: string }
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const link = (exits: Exit[], to: string) => {
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for (const exit of exits) {
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lines.push(
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exit.label ? ` ${exit.from} -->|"${exit.label}"| ${to}` : ` ${exit.from} --> ${to}`,
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)
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}
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}
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const walk = (steps: FlowStep[], entries: Exit[]): Exit[] => {
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let exits = entries
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for (const step of steps) {
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if (step.kind === "if") {
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const id = node((l) => `{"${l}"}`, step.text, "decision")
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link(exits, id)
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exits = [
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...walk(step.yes, [{ from: id, label: "是" }]),
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...walk(step.no, [{ from: id, label: "否" }]),
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]
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} else if (step.kind === "while") {
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const id = node((l) => `{"${l}"}`, step.text, "decision")
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link(exits, id)
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link(walk(step.body, [{ from: id, label: "是" }]), id)
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exits = [{ from: id, label: "否" }]
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} else {
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const shape =
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step.kind === "process" ? (l: string) => `["${l}"]` : (l: string) => `[/"${l}"/]`
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const id = node(shape, step.text, step.kind)
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link(exits, id)
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exits = [{ from: id }]
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}
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}
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return exits
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}
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const start = node((l) => `(["${l}"])`, "开始", "startNode")
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const exits = walk(doc.steps, [{ from: start }])
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const end = node((l) => `(["${l}"])`, "结束", "endNode")
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link(exits, end)
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return [...lines, "", ...classes].join("\n")
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}
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@@ -8,6 +8,7 @@ export * from "./common"
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export * from "./content"
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export * from "./contest"
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export * from "./flowchart"
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export * from "./flowchart-doc"
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export * from "./judge-status"
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export * from "./language"
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export * from "./problem"
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