chore: establish learning module baseline

OpenMAIC/app/api/courses/[courseId]/start/route.ts

@@ -0,0 +1,79 @@
+// Large-course mode API — confirm the framework and start module generation.
+//
+//   POST /api/courses/:courseId/start
+//
+// The two-layer flow is deliberately gated: creating a course only generates
+// the framework (status `framework_ready`). This endpoint is the operator's
+// explicit confirmation after reviewing the framework — only then does the
+// Layer-2 single-courseware agent start generating each module one by one.
+
+import { after, type NextRequest } from 'next/server';
+import { apiError, apiSuccess, API_ERROR_CODES } from '@/lib/server/api-response';
+import { buildRequestOrigin } from '@/lib/server/classroom-storage';
+import { createLogger } from '@/lib/logger';
+import { isValidCourseId, readCourseRecordReconciled } from '@/lib/course-framework/store';
+import {
+  isCourseGenerationRunning,
+  runCourseModuleGeneration,
+} from '@/lib/course-framework/runner';
+import { requireOpsAccess } from '@/lib/server/ops-access';
+import {
+  CourseMutationInProgressError,
+  isCoursePublishing,
+} from '@/lib/course-framework/publish-state';
+
+const log = createLogger('Course Start API');
+
+export async function POST(
+  req: NextRequest,
+  { params }: { params: Promise<{ courseId: string }> },
+) {
+  const denied = requireOpsAccess(req);
+  if (denied) return denied;
+
+  try {
+    const { courseId } = await params;
+    if (!isValidCourseId(courseId)) {
+      return apiError(API_ERROR_CODES.INVALID_REQUEST, 400, `Invalid course id: ${courseId}`);
+    }
+    const record = await readCourseRecordReconciled(courseId);
+    if (!record) {
+      return apiError(API_ERROR_CODES.INVALID_REQUEST, 404, `Course not found: ${courseId}`);
+    }
+    if (!record.framework) {
+      return apiError(API_ERROR_CODES.INVALID_REQUEST, 409, '课程框架尚未生成，请等待框架生成完成');
+    }
+    if (record.status !== 'framework_ready') {
+      return apiError(
+        API_ERROR_CODES.INVALID_REQUEST,
+        409,
+        `当前状态（${record.status}）不允许启动模块生成`,
+      );
+    }
+    if (
+      isCourseGenerationRunning(courseId) ||
+      isCoursePublishing(courseId) ||
+      record.modules.some((m) => m.status === 'generating')
+    ) {
+      return apiError(API_ERROR_CODES.INVALID_REQUEST, 409, '该课程已有生成任务正在运行');
+    }
+
+    const baseUrl = buildRequestOrigin(req);
+    const run = runCourseModuleGeneration(courseId, baseUrl);
+    after(() => run);
+
+    log.info(`Course ${courseId}: framework confirmed by operator — starting module generation`);
+    return apiSuccess({
+      courseId,
+      status: 'generating',
+      message: '模块生成已开始',
+      detailUrl: `${baseUrl}/api/courses/${courseId}`,
+    });
+  } catch (error) {
+    if (error instanceof CourseMutationInProgressError) {
+      return apiError(API_ERROR_CODES.INVALID_REQUEST, 409, error.message);
+    }
+    log.error('Course start failed:', error);
+    return apiError(API_ERROR_CODES.INTERNAL_ERROR, 500, 'Failed to start module generation');
+  }
+}