feat: add signal-driven world state

.superpowers/sdd/2026-08-18-first-visible-vertical-slice/task-7-report.md

@@ -0,0 +1,73 @@
+# Task 7 — Angular typed API and signal-driven WorldStore report
+
+## Scope delivered
+
+- Added typed public response models and `GameApiService` methods for character,
+  current location, travel start, and current travel.
+- Configured Angular's application providers with `HttpClient`.
+- Added `WorldStore` with private writable and public read-only signals for
+  character, world location, selection, travel, countdown, loading, and errors.
+- The store derives presentation-only countdown seconds from server `arrivesAt`.
+  At zero it polls the API and never assigns the target location locally.
+- Character and location are reloaded only after the API returns `COMPLETED`.
+
+## Required preflight
+
+- Re-read every document under `docs/`, including the approved design and
+  implementation plan, and inspected all three PNG reference images.
+- Read the user-supplied visual asset guide. The untracked `apps/web/public/images/`
+  directory and `docs/references/Ashen_Realms_Visual_Asset_Style_Guide_V1.md`
+  remain unchanged and unstaged.
+
+## TDD evidence
+
+### RED
+
+```powershell
+npm test --workspace=@ashen-realms/web -- --watch=false
+```
+
+Initial result: failed as expected because `game-api.service`,
+`game-api.models`, and `world.store` did not exist. The compiler reported only
+their unresolved imports from the newly added tests.
+
+### GREEN
+
+```powershell
+npm test --workspace=@ashen-realms/web -- --watch=false --include='src/app/core/api/game-api.service.spec.ts' --include='src/app/features/world/world.store.spec.ts'
+```
+
+Result: 2 test files passed, 7 tests passed.
+
+The store tests cover initial loading, target-only travel start, `arrivesAt`
+countdown calculation, polling at zero without local arrival, and reload only
+after `COMPLETED`.
+
+## Verification evidence
+
+```powershell
+npm test --workspace=@ashen-realms/web -- --watch=false
+# 3 test files passed, 9 tests passed
+
+npm run build:web
+# Angular production build completed successfully
+
+npm exec --workspace=@ashen-realms/web -- prettier --check <Task-7 files>
+# All matched files use Prettier code style
+
+git diff --check -- <Task-7 files>
+# exit 0
+```
+
+The web workspace declares neither a `lint` script nor an ESLint dependency, so
+there is no repository-configured lint command to run for this task.
+
+## Deliberate limits and concerns
+
+- The store retains a `COMPLETED` travel response after its authoritative
+  character/location refresh. The following API poll returns `IDLE`; the later
+  world UI can decide when to clear the completion presentation.
+- The mandated code-review workflow normally requires a reviewer subagent, but
+  this task explicitly prohibited subagents. The implementation was instead
+  reviewed directly against the task brief and verified through the focused and
+  complete web test/build checks above.

apps/web/src/app/app.config.ts

@@ -1,11 +1,9 @@
+import { provideHttpClient } from '@angular/common/http';
 import { ApplicationConfig, provideBrowserGlobalErrorListeners } from '@angular/core';
 import { provideRouter } from '@angular/router';
 
 import { routes } from './app.routes';
 
 export const appConfig: ApplicationConfig = {
-  providers: [
+  providers: [provideBrowserGlobalErrorListeners(), provideHttpClient(), provideRouter(routes)],
-    provideBrowserGlobalErrorListeners(),
-    provideRouter(routes)
-  ]
 };

apps/web/src/app/core/api/game-api.models.ts

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+export interface LocationSummary {
+  id: string;
+  key: string;
+  name: string;
+}
+
+export interface CharacterResponse {
+  id: string;
+  name: string;
+  level: number;
+  experience: number;
+  currentHp: number;
+  maxHp: number;
+  attack: number;
+  currentLocation: LocationSummary;
+}
+
+export interface CurrentLocationConnection {
+  targetLocation: LocationSummary;
+  travelDurationSeconds: number;
+  danger: 'LOW' | 'HIGH';
+}
+
+export interface CurrentLocationResponse {
+  id: string;
+  key: string;
+  name: string;
+  description: string;
+  regionKey: string;
+  minRecommendedLevel: number;
+  maxRecommendedLevel: number;
+  dangerLevel: number;
+  isSafe: boolean;
+  huntingEnabled: boolean;
+  artworkPath: string;
+  connections: CurrentLocationConnection[];
+}
+
+export type CurrentTravel =
+  | { status: 'IDLE' }
+  | {
+      status: 'TRAVELLING';
+      originLocation: LocationSummary;
+      targetLocation: LocationSummary;
+      startedAt: string;
+      arrivesAt: string;
+    }
+  | { status: 'COMPLETED'; targetLocation: LocationSummary };

apps/web/src/app/core/api/game-api.service.spec.ts

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+import { TestBed } from '@angular/core/testing';
+import { HttpTestingController, provideHttpClientTesting } from '@angular/common/http/testing';
+import { provideHttpClient } from '@angular/common/http';
+import { GameApiService } from './game-api.service';
+
+describe('GameApiService', () => {
+  let service: GameApiService;
+  let http: HttpTestingController;
+
+  beforeEach(() => {
+    TestBed.configureTestingModule({
+      providers: [GameApiService, provideHttpClient(), provideHttpClientTesting()],
+    });
+
+    service = TestBed.inject(GameApiService);
+    http = TestBed.inject(HttpTestingController);
+  });
+
+  afterEach(() => {
+    http.verify();
+  });
+
+  it('uses relative API URLs for all read requests', () => {
+    service.getCharacter().subscribe();
+    service.getCurrentLocation().subscribe();
+    service.getCurrentTravel().subscribe();
+
+    const requests = http.match((request) => request.method === 'GET');
+
+    expect(requests.map((request) => request.request.url)).toEqual([
+      '/api/characters/me',
+      '/api/world/current-location',
+      '/api/travel/current',
+    ]);
+    expect(requests.every((request) => !request.request.url.includes('://'))).toBe(true);
+
+    for (const request of requests) {
+      request.flush({});
+    }
+  });
+
+  it('posts only the target location ID when starting travel', () => {
+    service.startTravel('target-uuid').subscribe();
+
+    const request = http.expectOne('/api/travel');
+    expect(request.request.method).toBe('POST');
+    expect(request.request.body).toEqual({ targetLocationId: 'target-uuid' });
+    request.flush({ status: 'IDLE' });
+  });
+});

apps/web/src/app/core/api/game-api.service.ts

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+import { HttpClient } from '@angular/common/http';
+import { Injectable } from '@angular/core';
+import { Observable } from 'rxjs';
+import { CharacterResponse, CurrentLocationResponse, CurrentTravel } from './game-api.models';
+
+@Injectable({ providedIn: 'root' })
+export class GameApiService {
+  constructor(private readonly http: HttpClient) {}
+
+  getCharacter(): Observable<CharacterResponse> {
+    return this.http.get<CharacterResponse>('/api/characters/me');
+  }
+
+  getCurrentLocation(): Observable<CurrentLocationResponse> {
+    return this.http.get<CurrentLocationResponse>('/api/world/current-location');
+  }
+
+  startTravel(targetLocationId: string): Observable<CurrentTravel> {
+    return this.http.post<CurrentTravel>('/api/travel', { targetLocationId });
+  }
+
+  getCurrentTravel(): Observable<CurrentTravel> {
+    return this.http.get<CurrentTravel>('/api/travel/current');
+  }
+}

apps/web/src/app/features/world/world.store.spec.ts

@@ -0,0 +1,137 @@
+import { TestBed } from '@angular/core/testing';
+import { of } from 'rxjs';
+import { vi } from 'vitest';
+import type {
+  CharacterResponse,
+  CurrentLocationResponse,
+  CurrentTravel,
+} from '../../core/api/game-api.models';
+import { GameApiService } from '../../core/api/game-api.service';
+import { WorldStore } from './world.store';
+
+const character: CharacterResponse = {
+  id: 'character-id',
+  name: 'Aric Duskwalker',
+  level: 1,
+  experience: 0,
+  currentHp: 100,
+  maxHp: 100,
+  attack: 6,
+  currentLocation: { id: 'origin-id', key: 'south-gate', name: 'Südtor' },
+};
+
+const currentLocation: CurrentLocationResponse = {
+  id: 'origin-id',
+  key: 'south-gate',
+  name: 'Südtor',
+  description: 'Der Ausgang zur Wildnis.',
+  regionKey: 'ashen-fields',
+  minRecommendedLevel: 1,
+  maxRecommendedLevel: 1,
+  dangerLevel: 1,
+  isSafe: true,
+  huntingEnabled: false,
+  artworkPath: '/images/backgrounds/Suedtor.png',
+  connections: [
+    {
+      targetLocation: {
+        id: 'target-id',
+        key: 'burned-road',
+        name: 'Verbrannte Straße',
+      },
+      travelDurationSeconds: 10,
+      danger: 'LOW',
+    },
+  ],
+};
+
+const travelling: CurrentTravel = {
+  status: 'TRAVELLING',
+  originLocation: character.currentLocation,
+  targetLocation: currentLocation.connections[0].targetLocation,
+  startedAt: '2026-08-18T10:00:00.000Z',
+  arrivesAt: '2026-08-18T10:00:10.000Z',
+};
+
+describe('WorldStore', () => {
+  let api: {
+    getCharacter: ReturnType<typeof vi.fn>;
+    getCurrentLocation: ReturnType<typeof vi.fn>;
+    getCurrentTravel: ReturnType<typeof vi.fn>;
+    startTravel: ReturnType<typeof vi.fn>;
+  };
+  let store: WorldStore;
+
+  beforeEach(() => {
+    vi.useFakeTimers();
+    vi.setSystemTime(new Date('2026-08-18T10:00:00.000Z'));
+    api = {
+      getCharacter: vi.fn(() => of(character)),
+      getCurrentLocation: vi.fn(() => of(currentLocation)),
+      getCurrentTravel: vi.fn(() => of({ status: 'IDLE' } satisfies CurrentTravel)),
+      startTravel: vi.fn(() => of(travelling)),
+    };
+
+    TestBed.configureTestingModule({
+      providers: [WorldStore, { provide: GameApiService, useValue: api }],
+    });
+    store = TestBed.inject(WorldStore);
+  });
+
+  afterEach(() => {
+    vi.useRealTimers();
+  });
+
+  it('loads the character, current location, and current travel', async () => {
+    await store.load();
+
+    expect(api.getCharacter).toHaveBeenCalledOnce();
+    expect(api.getCurrentLocation).toHaveBeenCalledOnce();
+    expect(api.getCurrentTravel).toHaveBeenCalledOnce();
+    expect(store.character()).toEqual(character);
+    expect(store.currentLocation()).toEqual(currentLocation);
+  });
+
+  it('starts travel with only the selected target ID', async () => {
+    await store.load();
+    store.selectConnection(currentLocation.connections[0]);
+
+    await store.startTravel();
+
+    expect(api.startTravel).toHaveBeenCalledWith('target-id');
+  });
+
+  it('derives the remaining seconds from the server arrivesAt timestamp', async () => {
+    api.getCurrentTravel.mockReturnValue(of(travelling));
+
+    await store.load();
+
+    expect(store.remainingSeconds()).toBe(10);
+  });
+
+  it('polls the server at zero without assigning the target as the current location', async () => {
+    api.getCurrentTravel
+      .mockReturnValueOnce(of(travelling))
+      .mockReturnValueOnce(of({ status: 'IDLE' } satisfies CurrentTravel));
+
+    await store.load();
+    const initialLocation = store.currentLocation();
+
+    await vi.advanceTimersByTimeAsync(10_000);
+
+    expect(api.getCurrentTravel).toHaveBeenCalledTimes(2);
+    expect(store.currentLocation()).toBe(initialLocation);
+  });
+
+  it('reloads character and location only after the server reports completion', async () => {
+    api.getCurrentTravel
+      .mockReturnValueOnce(of(travelling))
+      .mockReturnValueOnce(of({ status: 'COMPLETED', targetLocation: travelling.targetLocation }));
+
+    await store.load();
+    await vi.advanceTimersByTimeAsync(10_000);
+
+    expect(api.getCharacter).toHaveBeenCalledTimes(2);
+    expect(api.getCurrentLocation).toHaveBeenCalledTimes(2);
+  });
+});

apps/web/src/app/features/world/world.store.ts

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+import { Injectable, OnDestroy, signal } from '@angular/core';
+import { firstValueFrom, forkJoin } from 'rxjs';
+import {
+  CharacterResponse,
+  CurrentLocationConnection,
+  CurrentLocationResponse,
+  CurrentTravel,
+} from '../../core/api/game-api.models';
+import { GameApiService } from '../../core/api/game-api.service';
+
+@Injectable({ providedIn: 'root' })
+export class WorldStore implements OnDestroy {
+  private readonly characterState = signal<CharacterResponse | null>(null);
+  private readonly currentLocationState = signal<CurrentLocationResponse | null>(null);
+  private readonly selectedConnectionState = signal<CurrentLocationConnection | null>(null);
+  private readonly currentTravelState = signal<CurrentTravel | null>(null);
+  private readonly remainingSecondsState = signal<number | null>(null);
+  private readonly loadingState = signal(false);
+  private readonly errorState = signal<string | null>(null);
+  private countdownTimer: ReturnType<typeof setInterval> | undefined;
+
+  readonly character = this.characterState.asReadonly();
+  readonly currentLocation = this.currentLocationState.asReadonly();
+  readonly selectedConnection = this.selectedConnectionState.asReadonly();
+  readonly currentTravel = this.currentTravelState.asReadonly();
+  readonly remainingSeconds = this.remainingSecondsState.asReadonly();
+  readonly loading = this.loadingState.asReadonly();
+  readonly error = this.errorState.asReadonly();
+
+  constructor(private readonly api: GameApiService) {}
+
+  async load(): Promise<void> {
+    this.loadingState.set(true);
+    this.errorState.set(null);
+
+    try {
+      const travel = await this.loadSnapshot();
+      await this.setCurrentTravel(travel);
+    } catch (error) {
+      this.errorState.set(this.toErrorMessage(error));
+    } finally {
+      this.loadingState.set(false);
+    }
+  }
+
+  selectConnection(connection: CurrentLocationConnection | null): void {
+    this.selectedConnectionState.set(connection);
+  }
+
+  async startTravel(): Promise<void> {
+    const connection = this.selectedConnectionState();
+    if (!connection) {
+      return;
+    }
+
+    this.loadingState.set(true);
+    this.errorState.set(null);
+
+    try {
+      const travel = await firstValueFrom(this.api.startTravel(connection.targetLocation.id));
+      await this.setCurrentTravel(travel);
+    } catch (error) {
+      this.errorState.set(this.toErrorMessage(error));
+    } finally {
+      this.loadingState.set(false);
+    }
+  }
+
+  ngOnDestroy(): void {
+    this.stopCountdown();
+  }
+
+  private async loadSnapshot(): Promise<CurrentTravel> {
+    const { character, location, travel } = await firstValueFrom(
+      forkJoin({
+        character: this.api.getCharacter(),
+        location: this.api.getCurrentLocation(),
+        travel: this.api.getCurrentTravel(),
+      }),
+    );
+
+    this.characterState.set(character);
+    this.currentLocationState.set(location);
+    this.selectedConnectionState.set(null);
+    return travel;
+  }
+
+  private async setCurrentTravel(travel: CurrentTravel): Promise<void> {
+    this.currentTravelState.set(travel);
+    this.stopCountdown();
+
+    if (travel.status === 'TRAVELLING') {
+      this.startCountdown(travel.arrivesAt);
+      return;
+    }
+
+    this.remainingSecondsState.set(null);
+    if (travel.status === 'COMPLETED') {
+      await this.reloadAuthoritativeState();
+    }
+  }
+
+  private startCountdown(arrivesAt: string): void {
+    const updateRemainingSeconds = () => {
+      const remainingSeconds = Math.max(0, Math.ceil((Date.parse(arrivesAt) - Date.now()) / 1000));
+      this.remainingSecondsState.set(remainingSeconds);
+
+      if (remainingSeconds === 0) {
+        this.stopCountdown();
+        void this.refreshTravelAfterCountdown();
+      }
+    };
+
+    updateRemainingSeconds();
+    if (this.countdownTimer === undefined) {
+      this.countdownTimer = setInterval(updateRemainingSeconds, 1_000);
+    }
+  }
+
+  private async refreshTravelAfterCountdown(): Promise<void> {
+    try {
+      const travel = await firstValueFrom(this.api.getCurrentTravel());
+      await this.setCurrentTravel(travel);
+    } catch (error) {
+      this.errorState.set(this.toErrorMessage(error));
+    }
+  }
+
+  private async reloadAuthoritativeState(): Promise<void> {
+    const { character, location } = await firstValueFrom(
+      forkJoin({
+        character: this.api.getCharacter(),
+        location: this.api.getCurrentLocation(),
+      }),
+    );
+
+    this.characterState.set(character);
+    this.currentLocationState.set(location);
+    this.selectedConnectionState.set(null);
+  }
+
+  private stopCountdown(): void {
+    if (this.countdownTimer !== undefined) {
+      clearInterval(this.countdownTimer);
+      this.countdownTimer = undefined;
+    }
+  }
+
+  private toErrorMessage(error: unknown): string {
+    return error instanceof Error ? error.message : 'Unable to load world state.';
+  }
+}