feat(阶段3): oj 侧端点铺开（基线提交，未经评审）

由外部 agent (Codex) 在本会话额度中断期间完成。原样提交作为基线，后续修复单独成 commit，便于区分与回退。覆盖 oj 侧 65 个端点，新增 9 组路由（account/achievement/ai/classroom/ content/contest/flowchart/problemset/site）与对应 Zod 契约。已核验：tsc --noEmit 退出码 0；API 可启动；/api/problems 返回真实数据； judge 与 flowchart worker 均 ready。未核验：权限边界与数据泄露，评审进行中。 Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
2026-08-07 01:25:36 -06:00
parent ec274419c3
commit 8c00cdc947
52 changed files with 4273 additions and 300 deletions
@@ -0,0 +1,105 @@
+import { config } from "../config"
+
+interface ChatMessage {
+  role: "system" | "user"
+  content: string
+}
+
+function requestBody(messages: ChatMessage[], stream: boolean) {
+  return {
+    model: config.aiModel,
+    messages,
+    stream,
+    temperature: 0,
+    thinking: { type: "disabled" },
+  }
+}
+
+export async function completeChat(system: string, user: string) {
+  if (!config.aiKey) throw new Error("缺少 AI_KEY")
+  const response = await fetch(new URL("/chat/completions", config.aiBaseUrl), {
+    method: "POST",
+    headers: { "content-type": "application/json", authorization: `Bearer ${config.aiKey}` },
+    body: JSON.stringify(requestBody([
+      { role: "system", content: system },
+      { role: "user", content: user },
+    ], false)),
+  })
+  if (!response.ok) throw new Error(`AI provider returned HTTP ${response.status}: ${await response.text()}`)
+  const payload = await response.json() as { choices?: Array<{ message?: { content?: string } }> }
+  return payload.choices?.[0]?.message?.content?.trim() ?? ""
+}
+
+export function streamChat(
+  system: string,
+  user: string,
+  onComplete?: (value: string) => Promise<void>,
+) {
+  const encoder = new TextEncoder()
+  const body = new ReadableStream<Uint8Array>({
+    async start(controller) {
+      const send = (value: string) => controller.enqueue(encoder.encode(value))
+      if (!config.aiKey) {
+        send(`data: ${JSON.stringify({ type: "error", message: "缺少 AI_KEY" })}\n\n`)
+        send("event: end\n\n")
+        controller.close()
+        return
+      }
+      try {
+        const response = await fetch(new URL("/chat/completions", config.aiBaseUrl), {
+          method: "POST",
+          headers: { "content-type": "application/json", authorization: `Bearer ${config.aiKey}` },
+          body: JSON.stringify(requestBody([
+            { role: "system", content: system },
+            { role: "user", content: user },
+          ], true)),
+        })
+        if (!response.ok || !response.body) throw new Error(`AI provider returned HTTP ${response.status}: ${await response.text()}`)
+        send("event: start\n\n")
+        const reader = response.body.getReader()
+        const decoder = new TextDecoder()
+        let buffer = ""
+        const chunks: string[] = []
+        while (true) {
+          const { done, value } = await reader.read()
+          buffer += decoder.decode(value, { stream: !done })
+          const lines = buffer.split("\n")
+          buffer = lines.pop() ?? ""
+          for (const raw of lines) {
+            const line = raw.trim()
+            if (!line.startsWith("data:")) continue
+            const data = line.slice(5).trim()
+            if (data === "[DONE]") continue
+            try {
+              const item = JSON.parse(data) as { choices?: Array<{ delta?: { content?: string }; finish_reason?: string | null }> }
+              const choice = item.choices?.[0]
+              const content = choice?.delta?.content
+              if (content) {
+                chunks.push(content)
+                send(`data: ${JSON.stringify({ type: "delta", content })}\n\n`)
+              }
+            } catch {
+              // Provider keepalive or a partial non-data line.
+            }
+          }
+          if (done) break
+        }
+        const full = chunks.join("").trim()
+        if (onComplete) await onComplete(full)
+        send(`data: ${JSON.stringify({ type: "done" })}\n\n`)
+      } catch (error) {
+        send(`data: ${JSON.stringify({ type: "error", message: error instanceof Error ? error.message : String(error) })}\n\n`)
+      } finally {
+        send("event: end\n\n")
+        controller.close()
+      }
+    },
+  })
+  return new Response(body, {
+    headers: {
+      "content-type": "text/event-stream; charset=utf-8",
+      "cache-control": "no-cache",
+      "x-accel-buffering": "no",
+    },
+  })
+}