Nlelouche Unity3d Antigravityskills Backend Integration

name: backend-integration description: "Integration with Backend-as-a-Service (BaaS) platforms like PlayFab, Firebase, or custom APIs for cloud save, auth, and leaderboards." version: 2.0.0 tags: ["backend", "playfab", "firebase", "api", "cloud-save", "auth"] argument-hint: "service='PlayFab' action='Login' OR feature='CloudData'" disable-model-invocation: false user-invocable: true allowed-tools: - run_command - list_dir - write_to_file requirements: unity_version: ">=6.0" render_pipeline: "Any" dependencies: [] context_discovery: check_unity_version: true check_render_pipeline: false scan_manifest_for: [] performance_budget: gc_alloc_per_frame: "N/A - async or editor-only" max_update_cost: "N/A" tdd_first: true # ⚠️ Updated by audit v2.0.1 - needs manual test implementation

Backend Integration

Overview

Integration strategies for cloud backends. Focuses on PlayFab and Firebase for authentication, cloud data storage, leaderboards, and server-side logic (Cloud Script).

When to Use

• Use for user accounts (Login/Register)
• Use for cross-device save games
• Use for global leaderboards
• Use for virtual currency and economy
• Use for live events and news

Common Services

Architecture

┌─────────────────────────────────────────────────────────────┐
│                    BACKEND ARCHITECTURE                     │
├─────────────────────────────────────────────────────────────┤
│                                                             │
│  CLIENT (UNITY)           API GATEWAY (REST)                │
│  ┌──────────────┐        ┌──────────────────┐               │
│  │ Auth Token   │───────▶│ Validate Token   │               │
│  │ Request Data │        │ Route Request    │               │
│  └──────────────┘        └────────┬─────────┘               │
│                                   │                         │
│                                   ▼                         │
│                         ┌───────────────────┐               │
│                         │ SERVERLESS LOGIC  │               │
│                         │ (Validate Rules)  │               │
│                         └─────────┬─────────┘               │
│                                   │                         │
│                                   ▼                         │
│                         ┌───────────────────┐               │
│                         │     DATABASE      │               │
│                         │   (Persistence)   │               │
│                         └───────────────────┘               │
│                                                             │
└─────────────────────────────────────────────────────────────┘

Best Practices

• ✅ Authenticate silently (Auto-login) first
• ✅ Use Cloud Script for sensitive logic (Currency, XP)
• ✅ Cache data locally to avoid API throttling
• ✅ Handle "No Internet" states gracefully
• ✅ Secure API keys (don't commit to Git)
• ❌ NEVER trust the client with economy changes
• ❌ NEVER store passwords in plain text
• ❌ NEVER block the main thread with API calls

Few-Shot Examples

Example 1: PlayFab Login

User: "Login player silently."

Agent:

public void Login()
{
    var request = new LoginWithCustomIDRequest
    {
        CustomId = SystemInfo.deviceUniqueIdentifier,
        CreateAccount = true
    };
    
    PlayFabClientAPI.LoginWithCustomID(request, 
        result => Debug.Log("Login Success"), 
        error => Debug.LogError(error.GenerateErrorReport()));
}

Example 2: Update Cloud Data

User: "Save player level to cloud."

Agent:

public void SaveLevel(int level)
{
    var request = new UpdateUserDataRequest
    {
        Data = new Dictionary<string, string> {
            { "PlayerLevel", level.ToString() }
        }
    };
    
    PlayFabClientAPI.UpdateUserData(request, 
        result => Debug.Log("Saved"), 
        error => Debug.LogError("Save Failed"));
}

Example 3: Cloud Script (Economy)

User: "Add gold securely."

Agent:

// Server-side (Azure Function / CloudScript)
handlers.grantGold = function(args, context) {
    var amount = 100; // Fixed server-side
    server.AddUserVirtualCurrency({
        PlayFabId: currentPlayerId,
        VirtualCurrency: "GD",
        Amount: amount
    });
    return { granted: amount };
};

TDD Contract

⚠️ Legacy Skill — Refactor Pending Este skill NO tiene tests automatizados aún. El siguiente boilerplate es un punto de partida.

// Escribe estos tests ANTES de implementar:

// Test 1: should [expected behavior] when [condition]
[Test]
public void BackendIntegration_Should{ExpectedBehavior}_When{Condition}()
{{
    // Arrange
    // TODO: Setup test fixtures
    
    // Act
    // TODO: Execute system under test
    
    // Assert
    Assert.Fail("Not implemented — write test first");
}}

// Test 2: should handle [edge case]
[Test]
public void BackendIntegration_ShouldHandle{EdgeCase}()
{{
    // Arrange
    // TODO: Setup edge case scenario
    
    // Act
    // TODO: Execute
    
    // Assert
    Assert.Fail("Not implemented");
}}

// Test 3: should throw when [invalid input]
[Test]
public void BackendIntegration_ShouldThrow_When{InvalidInput}()
{{
    // Arrange
    var invalidInput = default;
    
    // Act & Assert
    Assert.Throws<Exception>(() => {{ /* execute */ }});
}}

Pasos para completar el TDD:

1. Descomenta los tests above
2. Implementa la funcionalidad mínima para que compile
3. Ejecuta los tests — deben fallar (RED)
4. Implementa la funcionalidad real
5. Verifica que los tests pasen (GREEN)
6. Refactorea manteniendo los tests verdes

Nota: Este skill fue marcado como tdd_first: false durante la auditoría v2.0.1. La sección TDD fue agregada automáticamente pero requiere customización manual para reflejar el comportamiento real del skill.

Related Skills

• @analytics-heatmaps - Track backend events
• @monetization-iap - Validate receipts on backend
• @asynchronous-programming - Handle API calls

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