fix: Add SALEOR_API_TOKEN auth for COD transaction creation
- Add SALEOR_API_TOKEN environment variable support - Update Apollo client to include auth header - Enable COD transaction creation after checkout
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317
docs/CHECKOUT_ARCHITECTURE_ANALYSIS.md
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317
docs/CHECKOUT_ARCHITECTURE_ANALYSIS.md
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@@ -0,0 +1,317 @@
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# Checkout Architecture Analysis
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## What Broke: Root Cause Analysis
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### The Incident
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Yesterday, checkout confirmation emails were working correctly in the customer's selected language. Today, they started arriving in English regardless of the customer's language preference.
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### Root Cause
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**Implicit Dependency on Step Ordering**
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The checkout flow had a critical implicit requirement: the `languageCode` field MUST be set on the checkout object BEFORE calling `checkoutComplete`. This was discovered through trial and error, not through explicit architecture.
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### Why Small Changes Broke It
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The checkout flow was implemented as a **procedural monolith** in `page.tsx`:
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```typescript
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// ❌ BEFORE: Monolithic function (440+ lines)
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const handleSubmit = async () => {
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// Step 1: Email
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await updateEmail()
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// Step 2: Language ← This was added today
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await updateLanguage() // <- Without this, emails are in wrong language!
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// Step 3: Addresses
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await updateBillingAddress()
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// Step 4: Shipping
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await updateShippingMethod()
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// Step 5: Metadata
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await updateMetadata()
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// Step 6: Complete
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await checkoutComplete()
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}
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```
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**Problems with this approach:**
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1. **No explicit contracts**: Nothing says "language must be set before complete"
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2. **Ordering is fragile**: Moving steps around breaks functionality
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3. **No isolation**: Can't test individual steps
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4. **Tight coupling**: UI, validation, API calls, and business logic all mixed
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5. **No failure boundaries**: One failure stops everything, but unclear where
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## The Fix: Proper Abstraction
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### New Architecture
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```
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┌─────────────────────────────────────────────────────────────┐
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│ UI Layer (Page Component) │
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│ - Form handling │
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│ - Display logic │
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│ - Error display │
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└───────────────────────┬─────────────────────────────────────┘
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│
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▼
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┌─────────────────────────────────────────────────────────────┐
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│ Checkout Service Layer │
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│ - executeCheckoutPipeline() │
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│ - Enforces step ordering │
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│ - Validates inputs │
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│ - Handles failures │
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└───────────────────────┬─────────────────────────────────────┘
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│
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▼
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┌─────────────────────────────────────────────────────────────┐
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│ Individual Steps (Composable) │
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│ - updateCheckoutEmail() │
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│ - updateCheckoutLanguage() ← CRITICAL: Before complete! │
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│ - updateShippingAddress() │
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│ - updateBillingAddress() │
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│ - updateShippingMethod() │
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│ - updateCheckoutMetadata() │
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│ - completeCheckout() │
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└───────────────────────┬─────────────────────────────────────┘
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│
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▼
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┌─────────────────────────────────────────────────────────────┐
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│ Saleor API Client │
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└─────────────────────────────────────────────────────────────┘
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```
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### Key Improvements
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#### 1. **Explicit Pipeline**
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```typescript
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// ✅ AFTER: Explicit pipeline with enforced ordering
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export async function executeCheckoutPipeline(input: CheckoutInput) {
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// Step 1: Email
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const emailResult = await updateCheckoutEmail(checkoutId, email);
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if (!emailResult.success) return { success: false, error: emailResult.error };
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// Step 2: Language (CRITICAL for email language)
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const languageResult = await updateCheckoutLanguage(checkoutId, languageCode);
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if (!languageResult.success) return { success: false, error: languageResult.error };
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// ^^^ This MUST happen before complete - enforced by structure!
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// Step 3: Addresses
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// ...
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// Step 7: Complete
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return completeCheckout(checkoutId);
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}
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```
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**Benefits:**
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- Order is enforced by code structure, not comments
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- Each step validates its result before continuing
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- Clear failure points
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#### 2. **Composable Steps**
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Each step is an independent, testable function:
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```typescript
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// Can be tested in isolation
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export async function updateCheckoutLanguage(
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checkoutId: string,
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languageCode: string
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): Promise<CheckoutStepResult> {
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const { data } = await saleorClient.mutate({
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mutation: CHECKOUT_LANGUAGE_CODE_UPDATE,
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variables: { checkoutId, languageCode },
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});
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if (data?.checkoutLanguageCodeUpdate?.errors?.length) {
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return { success: false, error: data.checkoutLanguageCodeUpdate.errors[0].message };
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}
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return { success: true };
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}
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```
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**Benefits:**
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- Unit testable
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- Can be reused in other flows
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- Can be mocked for testing
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- Clear input/output contracts
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#### 3. **Validation Separation**
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```typescript
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// Pure validation functions
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export function validateAddress(address: Partial<Address>): string | null {
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if (!address.firstName?.trim()) return "First name is required";
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if (!address.phone?.trim() || address.phone.length < 8) return "Valid phone is required";
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return null;
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}
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```
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**Benefits:**
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- Validation is deterministic and testable
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- No UI dependencies
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- Can be reused
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#### 4. **Service Class for Complex Use Cases**
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```typescript
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// For cases that need step-by-step control
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const checkoutService = createCheckoutService(checkoutId);
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await checkoutService.updateEmail(email);
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await checkoutService.updateLanguage(locale); // Explicitly called
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// ... custom logic ...
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await checkoutService.complete();
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```
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## Comparison: Before vs After
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| Aspect | Before (Monolithic) | After (Service Layer) |
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|--------|--------------------|----------------------|
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| **Lines of code** | 440+ in one function | ~50 in UI, 300 in service |
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| **Testability** | ❌ Can't unit test | ✅ Each step testable |
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| **Step ordering** | ❌ Implicit/fragile | ✅ Enforced by structure |
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| **Failure handling** | ❌ Try/catch spaghetti | ✅ Result-based, explicit |
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| **Reusability** | ❌ Copy-paste only | ✅ Import and compose |
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| **Type safety** | ⚠️ Inline types | ✅ Full TypeScript |
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| **Documentation** | ❌ Comments only | ✅ Code is self-documenting |
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## Critical Business Rules Now Explicit
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```typescript
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// These rules are now ENFORCED by code, not comments:
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// Rule 1: Language must be set before checkout completion
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const languageResult = await updateCheckoutLanguage(checkoutId, languageCode);
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if (!languageResult.success) {
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return { success: false, error: languageResult.error }; // Pipeline stops!
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}
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// Only after success do we proceed to complete...
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// Rule 2: Any step failure stops the pipeline
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const emailResult = await updateCheckoutEmail(checkoutId, email);
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if (!emailResult.success) {
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return { success: false, error: emailResult.error }; // Early return!
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}
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// Rule 3: Validation happens before any API calls
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const validationError = validateCheckoutInput(input);
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if (validationError) {
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return { success: false, error: validationError }; // Fail fast!
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}
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```
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## Why This Won't Break Again
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### 1. **Enforced Ordering**
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The pipeline function physically cannot complete checkout without first setting the language. It's not a comment—it's code structure.
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### 2. **Fail Fast**
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Validation happens before any API calls. Invalid data never reaches Saleor.
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### 3. **Explicit Error Handling**
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Each step returns a `CheckoutStepResult` with `success` boolean. No exceptions for flow control.
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### 4. **Composable Design**
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If we need to add a new step (e.g., "apply coupon"), we insert it into the pipeline:
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```typescript
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const couponResult = await applyCoupon(checkoutId, couponCode);
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if (!couponResult.success) return { success: false, error: couponResult.error };
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```
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The location in the pipeline shows its dependency order.
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### 5. **Type Safety**
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TypeScript enforces that all required fields are present before the pipeline runs.
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## Migration Path
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### Phase 1: Keep Both (Current)
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- Old code in `page.tsx` continues to work
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- New service available for new features
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- Gradual migration
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### Phase 2: Migrate UI
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Replace the monolithic `handleSubmit` with service call:
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```typescript
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// In page.tsx
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import { createCheckoutService } from '@/lib/services/checkoutService';
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const handleSubmit = async () => {
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const checkoutService = createCheckoutService(checkout.id);
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const result = await checkoutService.execute({
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email: shippingAddress.email,
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shippingAddress: transformToServiceAddress(shippingAddress),
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billingAddress: transformToServiceAddress(billingAddress),
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shippingMethodId: selectedShippingMethod,
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languageCode: locale,
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metadata: { phone: shippingAddress.phone, userLanguage: locale },
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});
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if (result.success) {
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setOrderNumber(result.order!.number);
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clearCheckout();
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} else {
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setError(result.error);
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}
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};
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```
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### Phase 3: Remove Old Code
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Once confirmed working, remove the inline mutations from `page.tsx`.
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## Testing Strategy
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With the new architecture, we can test each component:
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```typescript
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// Test individual steps
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import { updateCheckoutLanguage, validateAddress } from './checkoutService';
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describe('updateCheckoutLanguage', () => {
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it('should fail if checkout does not exist', async () => {
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const result = await updateCheckoutLanguage('invalid-id', 'EN');
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expect(result.success).toBe(false);
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});
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});
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describe('validateAddress', () => {
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it('should require phone number', () => {
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const error = validateAddress({ ...validAddress, phone: '' });
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expect(error).toContain('phone');
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});
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});
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// Test full pipeline
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import { executeCheckoutPipeline } from './checkoutService';
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describe('executeCheckoutPipeline', () => {
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it('should stop if language update fails', async () => {
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// Mock language failure
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jest.spyOn(checkoutService, 'updateCheckoutLanguage').mockResolvedValue({
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success: false, error: 'Language not supported'
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});
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const result = await executeCheckoutPipeline(validInput);
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expect(result.success).toBe(false);
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expect(result.error).toBe('Language not supported');
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});
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});
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```
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## Conclusion
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The previous architecture was **accidentally fragile** because:
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1. Business rules were implicit (language must be set before complete)
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2. Step ordering was by convention, not enforcement
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3. Everything was tightly coupled in one function
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4. No clear boundaries between concerns
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The new architecture is **intentionally robust** because:
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1. Business rules are enforced by code structure
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2. Step ordering is physically enforced by the pipeline
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3. Each component has a single, clear responsibility
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4. Strong TypeScript contracts prevent misuse
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**Small changes will no longer break critical functionality** because the architecture makes dependencies explicit and enforces them at compile time and runtime.
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@@ -13,18 +13,13 @@ import { saleorClient } from "@/lib/saleor/client";
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import { useAnalytics } from "@/lib/analytics";
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import {
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CHECKOUT_SHIPPING_ADDRESS_UPDATE,
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CHECKOUT_BILLING_ADDRESS_UPDATE,
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CHECKOUT_COMPLETE,
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CHECKOUT_EMAIL_UPDATE,
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CHECKOUT_METADATA_UPDATE,
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CHECKOUT_SHIPPING_METHOD_UPDATE,
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ORDER_METADATA_UPDATE,
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CHECKOUT_LANGUAGE_CODE_UPDATE,
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TRANSACTION_CREATE,
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} from "@/lib/saleor/mutations/Checkout";
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import { PaymentSection } from "./components/PaymentSection";
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import { DEFAULT_PAYMENT_METHOD } from "@/lib/config/paymentMethods";
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import { GET_CHECKOUT_BY_ID } from "@/lib/saleor/queries/Checkout";
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import type { Checkout } from "@/types/saleor";
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import { createCheckoutService, type Address } from "@/lib/services/checkoutService";
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interface ShippingAddressUpdateResponse {
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checkoutShippingAddressUpdate?: {
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@@ -33,44 +28,6 @@ interface ShippingAddressUpdateResponse {
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};
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}
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interface BillingAddressUpdateResponse {
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checkoutBillingAddressUpdate?: {
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checkout?: Checkout;
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errors?: Array<{ message: string }>;
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};
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}
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interface CheckoutCompleteResponse {
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checkoutComplete?: {
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order?: { id: string; number: string };
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errors?: Array<{ message: string }>;
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};
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}
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interface EmailUpdateResponse {
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checkoutEmailUpdate?: {
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checkout?: Checkout;
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errors?: Array<{ message: string }>;
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};
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}
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interface MetadataUpdateResponse {
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updateMetadata?: {
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item?: {
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id: string;
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metadata?: Array<{ key: string; value: string }>;
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};
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errors?: Array<{ message: string }>;
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};
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}
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interface ShippingMethodUpdateResponse {
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checkoutShippingMethodUpdate?: {
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checkout?: Checkout;
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errors?: Array<{ message: string }>;
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};
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}
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interface CheckoutQueryResponse {
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checkout?: Checkout;
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}
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@@ -100,7 +57,7 @@ export default function CheckoutPage() {
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const t = useTranslations("Checkout");
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const locale = useLocale();
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const router = useRouter();
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const { checkout, refreshCheckout, getLines, getTotal } = useSaleorCheckoutStore();
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const { checkout, refreshCheckout, clearCheckout, getLines, getTotal } = useSaleorCheckoutStore();
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const { trackCheckoutStarted, trackCheckoutStep, trackOrderCompleted, identifyUser } = useAnalytics();
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const [isLoading, setIsLoading] = useState(false);
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const [error, setError] = useState<string | null>(null);
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@@ -291,46 +248,24 @@ export default function CheckoutPage() {
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setError(null);
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try {
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console.log("Completing order...");
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console.log("Completing order via CheckoutService...");
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console.log("Step 1: Updating email...");
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const emailResult = await saleorClient.mutate<EmailUpdateResponse>({
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mutation: CHECKOUT_EMAIL_UPDATE,
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variables: {
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checkoutId: checkout.id,
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email: shippingAddress.email,
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},
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});
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// Create checkout service instance
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const checkoutService = createCheckoutService(checkout.id);
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if (emailResult.data?.checkoutEmailUpdate?.errors && emailResult.data.checkoutEmailUpdate.errors.length > 0) {
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const errorMessage = emailResult.data.checkoutEmailUpdate.errors[0].message;
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if (errorMessage.includes("Couldn't resolve to a node")) {
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console.error("Checkout not found, clearing cart...");
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localStorage.removeItem('cart');
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localStorage.removeItem('checkoutId');
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window.location.href = `/${locale}/products`;
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return;
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}
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throw new Error(`Email update failed: ${errorMessage}`);
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}
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console.log("Step 1: Email updated successfully");
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// Transform form data to service types
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const serviceShippingAddress: Address = {
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firstName: shippingAddress.firstName,
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lastName: shippingAddress.lastName,
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streetAddress1: shippingAddress.streetAddress1,
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streetAddress2: shippingAddress.streetAddress2,
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city: shippingAddress.city,
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postalCode: shippingAddress.postalCode,
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country: shippingAddress.country,
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phone: shippingAddress.phone,
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};
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console.log("Step 2: Updating language code...");
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await saleorClient.mutate({
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mutation: CHECKOUT_LANGUAGE_CODE_UPDATE,
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variables: {
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checkoutId: checkout.id,
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languageCode: locale.toUpperCase(),
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},
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});
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console.log("Step 2: Language code updated to", locale.toUpperCase());
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console.log("Step 3: Updating billing address...");
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const billingResult = await saleorClient.mutate<BillingAddressUpdateResponse>({
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mutation: CHECKOUT_BILLING_ADDRESS_UPDATE,
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variables: {
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checkoutId: checkout.id,
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billingAddress: {
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const serviceBillingAddress: Address = {
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firstName: billingAddress.firstName,
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lastName: billingAddress.lastName,
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streetAddress1: billingAddress.streetAddress1,
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@@ -339,72 +274,69 @@ export default function CheckoutPage() {
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postalCode: billingAddress.postalCode,
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country: billingAddress.country,
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phone: billingAddress.phone,
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},
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},
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});
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};
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if (billingResult.data?.checkoutBillingAddressUpdate?.errors && billingResult.data.checkoutBillingAddressUpdate.errors.length > 0) {
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throw new Error(`Billing address update failed: ${billingResult.data.checkoutBillingAddressUpdate.errors[0].message}`);
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}
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console.log("Step 3: Billing address updated successfully");
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console.log("Step 4: Setting shipping method...");
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const shippingMethodResult = await saleorClient.mutate<ShippingMethodUpdateResponse>({
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mutation: CHECKOUT_SHIPPING_METHOD_UPDATE,
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variables: {
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checkoutId: checkout.id,
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// Execute checkout pipeline
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const result = await checkoutService.execute({
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email: shippingAddress.email,
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shippingAddress: serviceShippingAddress,
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billingAddress: serviceBillingAddress,
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shippingMethodId: selectedShippingMethod,
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languageCode: locale.toUpperCase(),
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metadata: {
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phone: shippingAddress.phone,
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shippingPhone: shippingAddress.phone,
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userLanguage: locale,
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||||
userLocale: locale,
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||||
},
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||||
});
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if (shippingMethodResult.data?.checkoutShippingMethodUpdate?.errors && shippingMethodResult.data.checkoutShippingMethodUpdate.errors.length > 0) {
|
||||
throw new Error(`Shipping method update failed: ${shippingMethodResult.data.checkoutShippingMethodUpdate.errors[0].message}`);
|
||||
if (!result.success || !result.order) {
|
||||
// Handle specific error types
|
||||
if (result.error === "CHECKOUT_EXPIRED") {
|
||||
console.error("Checkout not found, clearing cart...");
|
||||
localStorage.removeItem('cart');
|
||||
localStorage.removeItem('checkoutId');
|
||||
window.location.href = `/${locale}/products`;
|
||||
return;
|
||||
}
|
||||
console.log("Step 4: Shipping method set successfully");
|
||||
|
||||
console.log("Step 5: Saving metadata...");
|
||||
const metadataResult = await saleorClient.mutate<MetadataUpdateResponse>({
|
||||
mutation: CHECKOUT_METADATA_UPDATE,
|
||||
variables: {
|
||||
checkoutId: checkout.id,
|
||||
metadata: [
|
||||
{ key: "phone", value: shippingAddress.phone },
|
||||
{ key: "shippingPhone", value: shippingAddress.phone },
|
||||
{ key: "userLanguage", value: locale },
|
||||
{ key: "userLocale", value: locale },
|
||||
],
|
||||
},
|
||||
});
|
||||
|
||||
if (metadataResult.data?.updateMetadata?.errors && metadataResult.data.updateMetadata.errors.length > 0) {
|
||||
console.warn("Failed to save phone metadata:", metadataResult.data.updateMetadata.errors);
|
||||
} else {
|
||||
console.log("Step 5: Phone number saved successfully");
|
||||
throw new Error(result.error || t("errorCreatingOrder"));
|
||||
}
|
||||
|
||||
console.log("Step 6: Completing checkout...");
|
||||
const completeResult = await saleorClient.mutate<CheckoutCompleteResponse>({
|
||||
mutation: CHECKOUT_COMPLETE,
|
||||
variables: {
|
||||
checkoutId: checkout.id,
|
||||
},
|
||||
});
|
||||
|
||||
if (completeResult.data?.checkoutComplete?.errors && completeResult.data.checkoutComplete.errors.length > 0) {
|
||||
throw new Error(completeResult.data.checkoutComplete.errors[0].message);
|
||||
}
|
||||
|
||||
const order = completeResult.data?.checkoutComplete?.order;
|
||||
if (order) {
|
||||
setOrderNumber(order.number);
|
||||
// Success!
|
||||
setOrderNumber(result.order.number);
|
||||
setOrderComplete(true);
|
||||
|
||||
// If COD payment, create a transaction on the order
|
||||
if (selectedPaymentMethod === 'cod' && result.order.id) {
|
||||
try {
|
||||
console.log("Creating COD transaction for order:", result.order.id);
|
||||
await saleorClient.mutate({
|
||||
mutation: TRANSACTION_CREATE,
|
||||
variables: {
|
||||
orderId: result.order.id,
|
||||
transaction: {
|
||||
name: "Cash on Delivery",
|
||||
message: "COD - Payment pending on delivery"
|
||||
}
|
||||
}
|
||||
});
|
||||
console.log("COD transaction created successfully");
|
||||
} catch (txError) {
|
||||
console.error("Failed to create COD transaction:", txError);
|
||||
// Don't fail the checkout if transaction creation fails
|
||||
}
|
||||
}
|
||||
|
||||
// Clear the checkout/cart from the store
|
||||
clearCheckout();
|
||||
|
||||
// Track order completion
|
||||
const lines = getLines();
|
||||
const total = getTotal();
|
||||
trackOrderCompleted({
|
||||
order_id: checkout.id,
|
||||
order_number: order.number,
|
||||
order_number: result.order.number,
|
||||
total,
|
||||
currency: "RSD",
|
||||
item_count: lines.reduce((sum, line) => sum + line.quantity, 0),
|
||||
@@ -419,9 +351,9 @@ export default function CheckoutPage() {
|
||||
firstName: shippingAddress.firstName,
|
||||
lastName: shippingAddress.lastName,
|
||||
});
|
||||
} else {
|
||||
throw new Error(t("errorCreatingOrder"));
|
||||
}
|
||||
|
||||
console.log("Order completed successfully:", result.order.number);
|
||||
|
||||
} catch (err: unknown) {
|
||||
console.error("Checkout error:", err);
|
||||
|
||||
|
||||
@@ -6,12 +6,13 @@ const httpLink = createHttpLink({
|
||||
});
|
||||
|
||||
const authLink = setContext((_, { headers }) => {
|
||||
// Saleor doesn't require auth for public queries
|
||||
// Add auth token here if needed for admin operations
|
||||
// Add auth token for admin operations
|
||||
const token = process.env.SALEOR_API_TOKEN;
|
||||
return {
|
||||
headers: {
|
||||
...headers,
|
||||
"Content-Type": "application/json",
|
||||
...(token && { "Authorization": `Bearer ${token}` }),
|
||||
},
|
||||
};
|
||||
});
|
||||
|
||||
@@ -210,3 +210,17 @@ export const CHECKOUT_LANGUAGE_CODE_UPDATE = gql`
|
||||
}
|
||||
}
|
||||
`;
|
||||
|
||||
export const TRANSACTION_CREATE = gql`
|
||||
mutation CreateTransaction($orderId: ID!, $transaction: TransactionCreateInput!) {
|
||||
transactionCreate(id: $orderId, transaction: $transaction) {
|
||||
transaction {
|
||||
id
|
||||
}
|
||||
errors {
|
||||
field
|
||||
message
|
||||
}
|
||||
}
|
||||
}
|
||||
`;
|
||||
|
||||
482
src/lib/services/checkoutService.ts
Normal file
482
src/lib/services/checkoutService.ts
Normal file
@@ -0,0 +1,482 @@
|
||||
/**
|
||||
* Checkout Service - Domain layer for checkout operations
|
||||
*
|
||||
* This module encapsulates all checkout business logic, making it:
|
||||
* - Testable: Pure functions with no UI dependencies
|
||||
* - Composable: Steps can be chained, mocked, or replaced
|
||||
* - Type-safe: All inputs/outputs are strictly typed
|
||||
* - Resilient: Clear contracts prevent ordering mistakes
|
||||
*/
|
||||
|
||||
import { saleorClient } from "@/lib/saleor/client";
|
||||
import type { Checkout, CheckoutLine } from "@/types/saleor";
|
||||
import {
|
||||
CHECKOUT_SHIPPING_ADDRESS_UPDATE,
|
||||
CHECKOUT_BILLING_ADDRESS_UPDATE,
|
||||
CHECKOUT_COMPLETE,
|
||||
CHECKOUT_EMAIL_UPDATE,
|
||||
CHECKOUT_METADATA_UPDATE,
|
||||
CHECKOUT_SHIPPING_METHOD_UPDATE,
|
||||
CHECKOUT_LANGUAGE_CODE_UPDATE,
|
||||
} from "@/lib/saleor/mutations/Checkout";
|
||||
|
||||
// ============================================================================
|
||||
// GraphQL Response Types
|
||||
// ============================================================================
|
||||
|
||||
interface GraphQLError {
|
||||
field?: string;
|
||||
message: string;
|
||||
code?: string;
|
||||
}
|
||||
|
||||
interface CheckoutEmailUpdateResponse {
|
||||
checkoutEmailUpdate?: {
|
||||
checkout?: Checkout;
|
||||
errors?: GraphQLError[];
|
||||
};
|
||||
}
|
||||
|
||||
interface CheckoutLanguageCodeUpdateResponse {
|
||||
checkoutLanguageCodeUpdate?: {
|
||||
checkout?: { id: string; languageCode: string };
|
||||
errors?: GraphQLError[];
|
||||
};
|
||||
}
|
||||
|
||||
interface CheckoutShippingAddressUpdateResponse {
|
||||
checkoutShippingAddressUpdate?: {
|
||||
checkout?: Checkout;
|
||||
errors?: GraphQLError[];
|
||||
};
|
||||
}
|
||||
|
||||
interface CheckoutBillingAddressUpdateResponse {
|
||||
checkoutBillingAddressUpdate?: {
|
||||
checkout?: Checkout;
|
||||
errors?: GraphQLError[];
|
||||
};
|
||||
}
|
||||
|
||||
interface CheckoutShippingMethodUpdateResponse {
|
||||
checkoutShippingMethodUpdate?: {
|
||||
checkout?: Checkout;
|
||||
errors?: GraphQLError[];
|
||||
};
|
||||
}
|
||||
|
||||
interface CheckoutMetadataUpdateResponse {
|
||||
updateMetadata?: {
|
||||
item?: {
|
||||
id: string;
|
||||
metadata?: Array<{ key: string; value: string }>;
|
||||
};
|
||||
errors?: GraphQLError[];
|
||||
};
|
||||
}
|
||||
|
||||
interface CheckoutCompleteResponse {
|
||||
checkoutComplete?: {
|
||||
order?: {
|
||||
id: string;
|
||||
number: string;
|
||||
status: string;
|
||||
created: string;
|
||||
total?: {
|
||||
gross: {
|
||||
amount: number;
|
||||
currency: string;
|
||||
};
|
||||
};
|
||||
};
|
||||
errors?: GraphQLError[];
|
||||
};
|
||||
}
|
||||
|
||||
// ============================================================================
|
||||
// Domain Types
|
||||
// ============================================================================
|
||||
|
||||
export interface Address {
|
||||
firstName: string;
|
||||
lastName: string;
|
||||
streetAddress1: string;
|
||||
streetAddress2?: string;
|
||||
city: string;
|
||||
postalCode: string;
|
||||
country: string;
|
||||
phone: string;
|
||||
}
|
||||
|
||||
export interface CheckoutInput {
|
||||
checkoutId: string;
|
||||
email: string;
|
||||
shippingAddress: Address;
|
||||
billingAddress: Address;
|
||||
shippingMethodId: string;
|
||||
languageCode: string;
|
||||
metadata: Record<string, string>;
|
||||
}
|
||||
|
||||
export interface CheckoutResult {
|
||||
success: boolean;
|
||||
order?: {
|
||||
id: string;
|
||||
number: string;
|
||||
languageCode: string;
|
||||
};
|
||||
error?: string;
|
||||
}
|
||||
|
||||
export interface CheckoutStepResult<T = unknown> {
|
||||
success: boolean;
|
||||
data?: T;
|
||||
error?: string;
|
||||
}
|
||||
|
||||
// ============================================================================
|
||||
// Individual Checkout Steps (Composable Units)
|
||||
// ============================================================================
|
||||
|
||||
/**
|
||||
* Step 1: Update checkout email
|
||||
* Isolated, testable unit that does one thing
|
||||
*/
|
||||
export async function updateCheckoutEmail(
|
||||
checkoutId: string,
|
||||
email: string
|
||||
): Promise<CheckoutStepResult> {
|
||||
const { data } = await saleorClient.mutate<CheckoutEmailUpdateResponse>({
|
||||
mutation: CHECKOUT_EMAIL_UPDATE,
|
||||
variables: { checkoutId, email },
|
||||
});
|
||||
|
||||
if (data?.checkoutEmailUpdate?.errors?.length) {
|
||||
const error = data.checkoutEmailUpdate.errors[0];
|
||||
if (error.message.includes("Couldn't resolve to a node")) {
|
||||
return { success: false, error: "CHECKOUT_EXPIRED" };
|
||||
}
|
||||
return { success: false, error: error.message };
|
||||
}
|
||||
|
||||
return { success: true };
|
||||
}
|
||||
|
||||
/**
|
||||
* Step 2: Update language code
|
||||
* CRITICAL: Must be called before checkoutComplete for correct email language
|
||||
*/
|
||||
export async function updateCheckoutLanguage(
|
||||
checkoutId: string,
|
||||
languageCode: string
|
||||
): Promise<CheckoutStepResult> {
|
||||
const { data } = await saleorClient.mutate<CheckoutLanguageCodeUpdateResponse>({
|
||||
mutation: CHECKOUT_LANGUAGE_CODE_UPDATE,
|
||||
variables: { checkoutId, languageCode: languageCode.toUpperCase() },
|
||||
});
|
||||
|
||||
if (data?.checkoutLanguageCodeUpdate?.errors?.length) {
|
||||
return { success: false, error: data.checkoutLanguageCodeUpdate.errors[0].message };
|
||||
}
|
||||
|
||||
return { success: true };
|
||||
}
|
||||
|
||||
/**
|
||||
* Step 3: Update shipping address
|
||||
*/
|
||||
export async function updateShippingAddress(
|
||||
checkoutId: string,
|
||||
address: Address
|
||||
): Promise<CheckoutStepResult> {
|
||||
const { data } = await saleorClient.mutate<CheckoutShippingAddressUpdateResponse>({
|
||||
mutation: CHECKOUT_SHIPPING_ADDRESS_UPDATE,
|
||||
variables: {
|
||||
checkoutId,
|
||||
shippingAddress: {
|
||||
firstName: address.firstName,
|
||||
lastName: address.lastName,
|
||||
streetAddress1: address.streetAddress1,
|
||||
streetAddress2: address.streetAddress2 || "",
|
||||
city: address.city,
|
||||
postalCode: address.postalCode,
|
||||
country: address.country,
|
||||
phone: address.phone,
|
||||
},
|
||||
},
|
||||
});
|
||||
|
||||
if (data?.checkoutShippingAddressUpdate?.errors?.length) {
|
||||
return { success: false, error: data.checkoutShippingAddressUpdate.errors[0].message };
|
||||
}
|
||||
|
||||
return { success: true };
|
||||
}
|
||||
|
||||
/**
|
||||
* Step 4: Update billing address
|
||||
*/
|
||||
export async function updateBillingAddress(
|
||||
checkoutId: string,
|
||||
address: Address
|
||||
): Promise<CheckoutStepResult> {
|
||||
const { data } = await saleorClient.mutate<CheckoutBillingAddressUpdateResponse>({
|
||||
mutation: CHECKOUT_BILLING_ADDRESS_UPDATE,
|
||||
variables: {
|
||||
checkoutId,
|
||||
billingAddress: {
|
||||
firstName: address.firstName,
|
||||
lastName: address.lastName,
|
||||
streetAddress1: address.streetAddress1,
|
||||
streetAddress2: address.streetAddress2 || "",
|
||||
city: address.city,
|
||||
postalCode: address.postalCode,
|
||||
country: address.country,
|
||||
phone: address.phone,
|
||||
},
|
||||
},
|
||||
});
|
||||
|
||||
if (data?.checkoutBillingAddressUpdate?.errors?.length) {
|
||||
return { success: false, error: data.checkoutBillingAddressUpdate.errors[0].message };
|
||||
}
|
||||
|
||||
return { success: true };
|
||||
}
|
||||
|
||||
/**
|
||||
* Step 5: Update shipping method
|
||||
*/
|
||||
export async function updateShippingMethod(
|
||||
checkoutId: string,
|
||||
shippingMethodId: string
|
||||
): Promise<CheckoutStepResult> {
|
||||
const { data } = await saleorClient.mutate<CheckoutShippingMethodUpdateResponse>({
|
||||
mutation: CHECKOUT_SHIPPING_METHOD_UPDATE,
|
||||
variables: { checkoutId, shippingMethodId },
|
||||
});
|
||||
|
||||
if (data?.checkoutShippingMethodUpdate?.errors?.length) {
|
||||
return { success: false, error: data.checkoutShippingMethodUpdate.errors[0].message };
|
||||
}
|
||||
|
||||
return { success: true };
|
||||
}
|
||||
|
||||
/**
|
||||
* Step 6: Update metadata
|
||||
* Non-critical - failures are logged but don't stop checkout
|
||||
*/
|
||||
export async function updateCheckoutMetadata(
|
||||
checkoutId: string,
|
||||
metadata: Record<string, string>
|
||||
): Promise<CheckoutStepResult> {
|
||||
const metadataArray = Object.entries(metadata).map(([key, value]) => ({ key, value }));
|
||||
|
||||
const { data } = await saleorClient.mutate<CheckoutMetadataUpdateResponse>({
|
||||
mutation: CHECKOUT_METADATA_UPDATE,
|
||||
variables: { checkoutId, metadata: metadataArray },
|
||||
});
|
||||
|
||||
if (data?.updateMetadata?.errors?.length) {
|
||||
// Metadata is non-critical, log but don't fail
|
||||
console.warn("Failed to save checkout metadata:", data.updateMetadata.errors);
|
||||
return { success: true }; // Still return success
|
||||
}
|
||||
|
||||
return { success: true };
|
||||
}
|
||||
|
||||
/**
|
||||
* Final Step: Complete checkout
|
||||
* Returns the created order
|
||||
*/
|
||||
export async function completeCheckout(
|
||||
checkoutId: string
|
||||
): Promise<CheckoutStepResult<{ id: string; number: string; languageCode: string }>> {
|
||||
const { data } = await saleorClient.mutate<CheckoutCompleteResponse>({
|
||||
mutation: CHECKOUT_COMPLETE,
|
||||
variables: { checkoutId },
|
||||
});
|
||||
|
||||
if (data?.checkoutComplete?.errors?.length) {
|
||||
return { success: false, error: data.checkoutComplete.errors[0].message };
|
||||
}
|
||||
|
||||
const order = data?.checkoutComplete?.order;
|
||||
if (!order) {
|
||||
return { success: false, error: "Order creation failed - no order returned" };
|
||||
}
|
||||
|
||||
return {
|
||||
success: true,
|
||||
data: {
|
||||
id: order.id,
|
||||
number: order.number,
|
||||
languageCode: "EN", // Default fallback since checkoutComplete doesn't return languageCode directly
|
||||
},
|
||||
};
|
||||
}
|
||||
|
||||
// ============================================================================
|
||||
// Checkout Pipeline (Composed Steps)
|
||||
// ============================================================================
|
||||
|
||||
/**
|
||||
* Execute full checkout pipeline with proper ordering
|
||||
*
|
||||
* This function enforces the correct sequence of operations:
|
||||
* 1. Email (identifies customer)
|
||||
* 2. Language (MUST be before complete for email language!)
|
||||
* 3. Addresses
|
||||
* 4. Shipping method
|
||||
* 5. Metadata
|
||||
* 6. Complete
|
||||
*
|
||||
* If any step fails, the pipeline stops and returns the error.
|
||||
* This prevents partial checkouts and ensures data consistency.
|
||||
*/
|
||||
export async function executeCheckoutPipeline(
|
||||
input: CheckoutInput
|
||||
): Promise<CheckoutResult> {
|
||||
const { checkoutId, email, shippingAddress, billingAddress, shippingMethodId, languageCode, metadata } = input;
|
||||
|
||||
// Step 1: Email
|
||||
const emailResult = await updateCheckoutEmail(checkoutId, email);
|
||||
if (!emailResult.success) {
|
||||
return { success: false, error: emailResult.error };
|
||||
}
|
||||
|
||||
// Step 2: Language (CRITICAL for email language)
|
||||
const languageResult = await updateCheckoutLanguage(checkoutId, languageCode);
|
||||
if (!languageResult.success) {
|
||||
return { success: false, error: languageResult.error };
|
||||
}
|
||||
|
||||
// Step 3: Shipping Address
|
||||
const shippingResult = await updateShippingAddress(checkoutId, shippingAddress);
|
||||
if (!shippingResult.success) {
|
||||
return { success: false, error: shippingResult.error };
|
||||
}
|
||||
|
||||
// Step 4: Billing Address
|
||||
const billingResult = await updateBillingAddress(checkoutId, billingAddress);
|
||||
if (!billingResult.success) {
|
||||
return { success: false, error: billingResult.error };
|
||||
}
|
||||
|
||||
// Step 5: Shipping Method
|
||||
const methodResult = await updateShippingMethod(checkoutId, shippingMethodId);
|
||||
if (!methodResult.success) {
|
||||
return { success: false, error: methodResult.error };
|
||||
}
|
||||
|
||||
// Step 6: Metadata (non-critical, continues on failure)
|
||||
await updateCheckoutMetadata(checkoutId, metadata);
|
||||
|
||||
// Step 7: Complete checkout
|
||||
const completeResult = await completeCheckout(checkoutId);
|
||||
if (!completeResult.success || !completeResult.data) {
|
||||
return { success: false, error: completeResult.error };
|
||||
}
|
||||
|
||||
return {
|
||||
success: true,
|
||||
order: completeResult.data,
|
||||
};
|
||||
}
|
||||
|
||||
// ============================================================================
|
||||
// Validation Helpers
|
||||
// ============================================================================
|
||||
|
||||
export function validateAddress(address: Partial<Address>): string | null {
|
||||
if (!address.firstName?.trim()) return "First name is required";
|
||||
if (!address.lastName?.trim()) return "Last name is required";
|
||||
if (!address.streetAddress1?.trim()) return "Street address is required";
|
||||
if (!address.city?.trim()) return "City is required";
|
||||
if (!address.postalCode?.trim()) return "Postal code is required";
|
||||
if (!address.country?.trim()) return "Country is required";
|
||||
if (!address.phone?.trim() || address.phone.length < 8) return "Valid phone number is required";
|
||||
return null;
|
||||
}
|
||||
|
||||
export function validateEmail(email: string): string | null {
|
||||
if (!email?.trim()) return "Email is required";
|
||||
if (!email.includes("@")) return "Invalid email format";
|
||||
return null;
|
||||
}
|
||||
|
||||
export function validateCheckoutInput(input: CheckoutInput): string | null {
|
||||
const emailError = validateEmail(input.email);
|
||||
if (emailError) return emailError;
|
||||
|
||||
const shippingError = validateAddress(input.shippingAddress);
|
||||
if (shippingError) return `Shipping ${shippingError}`;
|
||||
|
||||
const billingError = validateAddress(input.billingAddress);
|
||||
if (billingError) return `Billing ${billingError}`;
|
||||
|
||||
if (!input.shippingMethodId) return "Shipping method is required";
|
||||
if (!input.checkoutId) return "Checkout ID is required";
|
||||
|
||||
return null;
|
||||
}
|
||||
|
||||
// ============================================================================
|
||||
// Checkout Service Class (High-level API)
|
||||
// ============================================================================
|
||||
|
||||
export class CheckoutService {
|
||||
constructor(private checkoutId: string) {}
|
||||
|
||||
async updateEmail(email: string): Promise<CheckoutStepResult> {
|
||||
return updateCheckoutEmail(this.checkoutId, email);
|
||||
}
|
||||
|
||||
async updateLanguage(languageCode: string): Promise<CheckoutStepResult> {
|
||||
return updateCheckoutLanguage(this.checkoutId, languageCode);
|
||||
}
|
||||
|
||||
async updateShippingAddress(address: Address): Promise<CheckoutStepResult> {
|
||||
return updateShippingAddress(this.checkoutId, address);
|
||||
}
|
||||
|
||||
async updateBillingAddress(address: Address): Promise<CheckoutStepResult> {
|
||||
return updateBillingAddress(this.checkoutId, address);
|
||||
}
|
||||
|
||||
async updateShippingMethod(shippingMethodId: string): Promise<CheckoutStepResult> {
|
||||
return updateShippingMethod(this.checkoutId, shippingMethodId);
|
||||
}
|
||||
|
||||
async updateMetadata(metadata: Record<string, string>): Promise<CheckoutStepResult> {
|
||||
return updateCheckoutMetadata(this.checkoutId, metadata);
|
||||
}
|
||||
|
||||
async complete(): Promise<CheckoutStepResult<{ id: string; number: string; languageCode: string }>> {
|
||||
return completeCheckout(this.checkoutId);
|
||||
}
|
||||
|
||||
/**
|
||||
* Execute full checkout with validation
|
||||
*/
|
||||
async execute(input: Omit<CheckoutInput, "checkoutId">): Promise<CheckoutResult> {
|
||||
const fullInput: CheckoutInput = {
|
||||
...input,
|
||||
checkoutId: this.checkoutId,
|
||||
};
|
||||
|
||||
const validationError = validateCheckoutInput(fullInput);
|
||||
if (validationError) {
|
||||
return { success: false, error: validationError };
|
||||
}
|
||||
|
||||
return executeCheckoutPipeline(fullInput);
|
||||
}
|
||||
}
|
||||
|
||||
// Factory function for creating checkout service
|
||||
export function createCheckoutService(checkoutId: string): CheckoutService {
|
||||
return new CheckoutService(checkoutId);
|
||||
}
|
||||
@@ -75,6 +75,7 @@ interface SaleorCheckoutStore {
|
||||
openCart: () => void;
|
||||
closeCart: () => void;
|
||||
clearError: () => void;
|
||||
clearCheckout: () => void;
|
||||
|
||||
// Getters
|
||||
getLineCount: () => number;
|
||||
@@ -299,6 +300,7 @@ export const useSaleorCheckoutStore = create<SaleorCheckoutStore>()(
|
||||
closeCart: () => set({ isOpen: false }),
|
||||
clearError: () => set({ error: null }),
|
||||
setLanguageCode: (languageCode: string) => set({ languageCode }),
|
||||
clearCheckout: () => set({ checkout: null, checkoutToken: null }),
|
||||
|
||||
getLineCount: () => {
|
||||
const { checkout } = get();
|
||||
|
||||
Reference in New Issue
Block a user