2026-05-04-03-21-40 增加前后端协同和NIfTI导出

WebSite/src/lib/api.ts

@@ -0,0 +1,67 @@
+import { OverviewSummary, Project, SessionState, UserRecord } from '../types';
+
+async function request<T>(path: string, options: RequestInit = {}): Promise<T> {
+  const response = await fetch(path, {
+    headers: {
+      'Content-Type': 'application/json',
+      ...(options.headers ?? {}),
+    },
+    ...options,
+  });
+
+  if (!response.ok) {
+    let message = `请求失败：${response.status}`;
+    try {
+      const data = await response.json();
+      if (typeof data?.message === 'string') {
+        message = data.message;
+      }
+    } catch {
+      // Keep the status-based message when the response is not JSON.
+    }
+    throw new Error(message);
+  }
+
+  return response.json() as Promise<T>;
+}
+
+export const api = {
+  getSession: () => request<SessionState>('/api/session'),
+  login: (account: string, password: string) =>
+    request<SessionState>('/api/login', {
+      method: 'POST',
+      body: JSON.stringify({ account, password }),
+    }),
+  logout: () => request<SessionState>('/api/logout', { method: 'POST' }),
+  getOverview: () => request<OverviewSummary>('/api/overview'),
+  getProjects: () => request<Project[]>('/api/projects'),
+  getProject: (projectId: string) => request<Project>(`/api/projects/${projectId}`),
+  getUsers: () => request<UserRecord[]>('/api/users'),
+  resetDemo: () =>
+    request<{ ok: boolean; projects: Project[]; users: UserRecord[] }>('/api/demo/reset', {
+      method: 'POST',
+    }),
+};
+
+export async function downloadMask(projectId: string, format: 'nii' | 'nii.gz' = 'nii.gz') {
+  const response = await fetch(`/api/projects/${projectId}/export-mask?format=${encodeURIComponent(format)}`, {
+    method: 'POST',
+  });
+
+  if (!response.ok) {
+    throw new Error(`导出失败：${response.status}`);
+  }
+
+  const blob = await response.blob();
+  const disposition = response.headers.get('Content-Disposition') ?? '';
+  const match = disposition.match(/filename="([^"]+)"/);
+  const filename = match?.[1] ?? `segmentation-mask.${format}`;
+  const url = URL.createObjectURL(blob);
+  const link = document.createElement('a');
+  link.href = url;
+  link.download = filename;
+  document.body.appendChild(link);
+  link.click();
+  link.remove();
+  URL.revokeObjectURL(url);
+}