From b6617fc356f8c7a037e1db3a242355b820fb2572 Mon Sep 17 00:00:00 2001
From: Asger Geel Weirsoee <asger@weircon.dk>
Date: Sun, 1 Mar 2026 12:21:18 +0000
Subject: [PATCH] feat(spa): add Angular API client for health and session read

---
 frontend/src/api/angular-client.ts        | 62 +++++++++++++++
 frontend/tests/angular-api-client.test.ts | 92 +++++++++++++++++++++++
 2 files changed, 154 insertions(+)
 create mode 100644 frontend/src/api/angular-client.ts
 create mode 100644 frontend/tests/angular-api-client.test.ts

diff --git a/frontend/src/api/angular-client.ts b/frontend/src/api/angular-client.ts
new file mode 100644
index 0000000..add41c1
--- /dev/null
+++ b/frontend/src/api/angular-client.ts
@@ -0,0 +1,62 @@
+import type { ApiFailure, ApiResult, HealthResponse, SessionDetailResponse } from './types';
+
+export interface AngularHttpError {
+  status?: number;
+  message?: string;
+  error?: unknown;
+}
+
+export interface AngularHttpClientLike {
+  get<T>(url: string, options?: { withCredentials?: boolean }): Promise<T>;
+}
+
+export interface AngularApiClient {
+  health(): Promise<ApiResult<HealthResponse>>;
+  getSession(code: string): Promise<ApiResult<SessionDetailResponse>>;
+}
+
+function toFailure(error: unknown): ApiFailure {
+  const candidate = (error ?? {}) as AngularHttpError;
+  const status = typeof candidate.status === 'number' ? candidate.status : 0;
+  const payload = candidate.error;
+
+  if (status === 0) {
+    return {
+      kind: 'network',
+      status: 0,
+      message: candidate.message ?? 'Network error while contacting API'
+    };
+  }
+
+  return {
+    kind: 'http',
+    status,
+    message: candidate.message ?? `HTTP ${status}`,
+    ...(payload === undefined ? {} : { payload })
+  };
+}
+
+function normalizeCode(code: string): string {
+  return code.trim().toUpperCase();
+}
+
+async function wrapGet<T>(call: () => Promise<T>): Promise<ApiResult<T>> {
+  try {
+    const data = await call();
+    return { ok: true, status: 200, data };
+  } catch (error: unknown) {
+    return { ok: false, status: typeof (error as AngularHttpError)?.status === 'number' ? (error as AngularHttpError).status! : 0, error: toFailure(error) };
+  }
+}
+
+export function createAngularApiClient(http: AngularHttpClientLike, baseUrl = ''): AngularApiClient {
+  return {
+    health: () => wrapGet(() => http.get<HealthResponse>(`${baseUrl}/healthz`, { withCredentials: true })),
+    getSession: (code: string) =>
+      wrapGet(() =>
+        http.get<SessionDetailResponse>(`${baseUrl}/lobby/sessions/${encodeURIComponent(normalizeCode(code))}`, {
+          withCredentials: true
+        })
+      )
+  };
+}
diff --git a/frontend/tests/angular-api-client.test.ts b/frontend/tests/angular-api-client.test.ts
new file mode 100644
index 0000000..1020362
--- /dev/null
+++ b/frontend/tests/angular-api-client.test.ts
@@ -0,0 +1,92 @@
+import { describe, expect, it, vi } from 'vitest';
+
+import { createAngularApiClient, type AngularHttpClientLike } from '../src/api/angular-client';
+
+describe('createAngularApiClient', () => {
+  it('reads health and session detail using Django-compatible endpoints', async () => {
+    const get = vi.fn<AngularHttpClientLike['get']>(async <T>(url: string) => {
+      if (url === '/healthz') {
+        return { ok: true, service: 'partyhub' } as T;
+      }
+
+      if (url === '/lobby/sessions/ABCD12') {
+        return {
+          session: { code: 'ABCD12', status: 'lobby', host_id: 1, current_round: 1, players_count: 2 },
+          players: [
+            { id: 2, nickname: 'Maja', score: 0, is_connected: true },
+            { id: 3, nickname: 'Bo', score: 0, is_connected: false }
+          ],
+          round_question: null,
+          phase_view_model: {
+            status: 'lobby',
+            round_number: 1,
+            players_count: 2,
+            constraints: {
+              min_players_to_start: 2,
+              max_players_mvp: 8,
+              min_players_reached: true,
+              max_players_allowed: true
+            },
+            host: {
+              can_start_round: true,
+              can_show_question: false,
+              can_mix_answers: false,
+              can_calculate_scores: false,
+              can_reveal_scoreboard: false,
+              can_start_next_round: false,
+              can_finish_game: false
+            },
+            player: {
+              can_join: true,
+              can_submit_lie: false,
+              can_submit_guess: false,
+              can_view_final_result: false
+            }
+          }
+        } as T;
+      }
+
+      throw { status: 404, error: { error: 'Not found' } };
+    });
+
+    const http = { get };
+    const client = createAngularApiClient(http as AngularHttpClientLike);
+
+    const health = await client.health();
+    expect(health.ok).toBe(true);
+    if (health.ok) {
+      expect(health.data.ok).toBe(true);
+      expect(health.data.service).toBe('partyhub');
+    }
+
+    const session = await client.getSession(' abcd12 ');
+    expect(session.ok).toBe(true);
+    if (session.ok) {
+      expect(session.data.session.code).toBe('ABCD12');
+      expect(session.data.session.host_id).toBe(1);
+      expect(session.data.phase_view_model.host.can_start_round).toBe(true);
+    }
+
+    expect(get).toHaveBeenNthCalledWith(1, '/healthz', { withCredentials: true });
+    expect(get).toHaveBeenNthCalledWith(2, '/lobby/sessions/ABCD12', { withCredentials: true });
+  });
+
+  it('maps HttpErrorResponse-style failures to ApiResult errors', async () => {
+    const http = {
+      get: vi.fn<AngularHttpClientLike['get']>(async () => {
+        throw { status: 503, message: 'Service unavailable', error: { error: 'maintenance' } };
+      })
+    };
+
+    const client = createAngularApiClient(http as AngularHttpClientLike);
+    const result = await client.health();
+
+    expect(result.ok).toBe(false);
+    if (!result.ok) {
+      expect(result.status).toBe(503);
+      expect(result.error.kind).toBe('http');
+      expect(result.error.payload).toEqual({ error: 'maintenance' });
+      expect(result.error.message).toContain('Service unavailable');
+    }
+  });
+});
-- 
2.39.5