From af2b3c2bf4f1e26fec6e2d964aa2e5f9c4a08f9f Mon Sep 17 00:00:00 2001 From: dwindown Date: Sat, 18 Apr 2026 11:04:48 +0700 Subject: [PATCH] docs: add multicurrency implementation audit - Comprehensive trace of multicurrency functionality - Identified gaps: frontend currency selector, ExchangeRateAPI implementation, conversion logic - Documented defects: hardcoded IDR, empty API class, missing Bank Transfer currency column - Provided implementation order and testing checklist --- MULTICURRENCY_AUDIT.md | 343 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 343 insertions(+) create mode 100644 MULTICURRENCY_AUDIT.md diff --git a/MULTICURRENCY_AUDIT.md b/MULTICURRENCY_AUDIT.md new file mode 100644 index 000000000..c1f9a5dfe --- /dev/null +++ b/MULTICURRENCY_AUDIT.md @@ -0,0 +1,343 @@ +# Formipay — Multicurrency Implementation Audit + +**Date:** April 18, 2026 +**Scope:** Complete trace of multicurrency functionality +**Purpose:** Identify gaps, defects, and opportunities before Phase 4 implementation + +--- + +## Executive Summary + +The multicurrency system has a **solid foundation** in the admin (settings UI, data structures, per-currency pricing) but is **incomplete for end-users**. The framework exists but critical pieces are missing: frontend currency selection, exchange rate API integration, and actual conversion logic. + +**Status:** 🟡 Partial — Works in admin, broken on frontend + +--- + +## 1. What Works ✅ + +### 1.1 Admin Settings & Configuration +**Location:** `includes/Settings.php` lines 56-133 + +| Feature | Status | Details | +|---------|--------|---------| +| Enable/disable toggle | ✅ | `enable_multicurrency` checkbox | +| Currency management | ✅ | `multicurrencies` repeater with full config | +| Default currency | ✅ | `default_currency` setting | +| Per-currency decimals | ✅ | Custom decimal_digits, decimal_symbol, thousand_separator | +| Exchange rate fields | ✅ | Manual rate input (API integration non-functional) | +| Gateway association | ✅ | Link currencies to payment gateways | + +**Data Structure:** Currencies stored as `code:::name:::symbol` (e.g., `USD:::United States Dollar:::$`) + +### 1.2 Currency Data Source +**Location:** `admin/assets/json/currencies.json` + +- **196 currencies** available +- Loaded via `formipay_currency_array()` +- Cached via static variable (F1.13 optimization) +- Includes code, name, symbol, flag + +### 1.3 Product Pricing Per Currency +**Location:** `includes/Product.php` lines 386-432 + +Products can have different prices for each currency: +- Static items: `amount_{currency_code}` field +- Default currency price: `setting_product_price_regular_{code}` +- Sale price: `setting_product_price_sale_{code}` + +### 1.4 Price Formatting +**Location:** `admin/functions.php` lines 179-200 + +`formipay_price_format()` properly handles: +- Product-specific currency metadata +- Custom decimal digits, symbols, separators +- Format: `{symbol} {formatted_number}` + +--- + +## 2. What's Broken/Incomplete ❌ + +### 2.1 Frontend Currency Selection — **MISSING** + +**Problem:** Users have NO way to select currency on forms. + +**What exists:** +- `formipay.currency_code` hardcoded to `'IDR'` in `form-action.js:224` +- Currency data passed to admin via `wp_localize_script()` (Form.php:1289-1292) +- No UI element rendered on frontend forms + +**Impact:** Multicurrency is admin-only; frontend users always see default currency prices. + +### 2.2 Exchange Rate API — **EMPTY CLASS** + +**Location:** `includes/Integration/ExchangeRateAPI.php` + +**Status:** Completely empty class (8 lines total): +```php +class ExchangeRateAPI extends Payment { + use SingletonTrait; + protected function __construct() { + parent::__construct(); + // Empty - no implementation + } +} +``` + +**What's missing:** +- No API integration (ExchangeRate-API.io, Fixer.io, etc.) +- No rate fetching logic +- No caching mechanism +- No error handling +- Settings UI exists but non-functional + +### 2.3 Currency Conversion Logic — **NOT IMPLEMENTED** + +**Problem:** No actual conversion calculations anywhere. + +**What exists:** +- Framework for per-currency prices in products +- Manual exchange rate fields in settings (unused) +- `formipay_price_format()` displays but doesn't convert + +**Missing:** +- Conversion calculation functions +- Dynamic price switching based on user selection +- Conversion indicators on frontend + +### 2.4 Bank Transfer — Missing Currency Tracking + +**Location:** `includes/Payment/BankTransfer.php` create_db() + +**Problem:** Bank transfer transaction table has NO currency column: +```php +CREATE TABLE `formipay_bank_transfer_trx` ( + ... + `total` float(10, 2) DEFAULT 0, + -- Missing: `currency_code` text + ... +) +``` + +**Impact:** Can't determine which currency was used for bank transfer payments. + +### 2.5 Order Storage — Inconsistent + +| Gateway | Currency Stored | Location | +|---------|-----------------|----------| +| PayPal | ✅ `currency_code` | `Paypal.php:84` | +| Bank Transfer | ❌ Missing | — | +| General | ⚠️ `$this->currency` | `Order.php:95` (not in DB schema) | + +--- + +## 3. Gaps & Missing Features + +### 3.1 Critical Gaps + +| # | Gap | Impact | Priority | +|---|------|-------|----------| +| 1 | Frontend currency selector | Users can't choose currency | 🔴 High | +| 2 | ExchangeRateAPI implementation | No live rates | 🔴 High | +| 3 | Conversion calculation logic | Prices don't convert | 🔴 High | +| 4 | Bank Transfer currency tracking | Data loss | 🟡 Medium | +| 5 | Dynamic price display on frontend | Always shows default currency | 🔴 High | + +### 3.2 Data Flow Gaps + +``` +Expected Flow: +User selects currency → Fetch exchange rate → Convert prices → Display converted prices + +Actual Flow: +User selects currency → [NOT IMPLEMENTED] → [NOT IMPLEMENTED] → Shows default currency only +``` + +### 3.3 Missing Validation + +- No currency validation on form submission +- No check if selected currency is in allowed currencies +- No validation that required currencies have prices set + +--- + +## 4. Defects & Bugs + +### 4.1 Critical Bugs + +| # | Bug | Location | Impact | +|---|-----|----------|--------| +| 1 | `formipay.currency_code` hardcoded to 'IDR' | `public/assets/js/form-action.js:224` | Frontend always uses IDR | +| 2 | ExchangeRateAPI class is empty | `includes/Integration/ExchangeRateAPI.php` | Settings UI does nothing | +| 3 | Bank transfer has no currency column | `includes/Payment/BankTransfer.php:40-50` | Lost currency data | + +### 4.2 Minor Issues + +| # | Issue | Location | +|---|-------|----------| +| 1 | Fallback pattern conflicts | Multiple files | +| 2 | No currency flag in frontend | Render.php | +| 3 | Mixed code/symbol usage | Inconsistent display | + +--- + +## 5. Architecture & Data Flow + +### 5.1 Current Architecture + +``` +┌─────────────────────────────────────────────────────┐ +│ Admin Settings (WPCFTO) │ +│ - enable_multicurrency toggle │ +│ - multicurrencies[] repeater (currencies + rates) │ +│ - default_currency │ +└─────────────────────────────────────────────────────┘ + │ + ▼ +┌─────────────────────────────────────────────────────┐ +│ Product Editor (Vue) │ +│ - Per-currency pricing fields │ +│ - Variation pricing per currency │ +└─────────────────────────────────────────────────────┘ + │ + ▼ +┌�─────────────────────────────────────────────────────┐ +│ Form Rendering (PHP SSR) │ +│ - formipay.currency_code = 'IDR' (HARDCODED ❌) │ +│ - formipay_price_format($amount, $post_id) │ +│ - Shows: {symbol} {formatted_amount} │ +└─────────────────────────────────────────────────────┘ + │ + ▼ +┌─────────────────────────────────────────────────────┐ +│ Order Storage │ +│ - PayPal: has currency_code ✅ │ +│ - Bank Transfer: no currency ❌ │ +│ - General: $this->currency (not in DB) ⚠️ │ +└─────────────────────────────────────────────────────┘ +``` + +### 5.2 Data Structures + +**Currency Format:** `code:::name:::symbol` +- Example: `USD:::United States Dollar:::$` +- Example with symbol: `IDR:::Indonesian Rupiah:::Rp` + +**Product Price Storage:** +```php +// Per currency (static items) +$static_item['amount_USD'] = '29.99'; +$static_item['amount_IDR'] = '450000'; + +// Default currency +get_post_meta($post_id, 'product_currency'); // "USD:::..." +get_post_meta($post_id, 'product_currency_decimal_digits'); // 2 +``` + +**Order Currency Storage:** +```php +// PayPal (correct) +$currency_code = $currency_parts[0]; // 'USD' + +// Bank Transfer (missing) +// No currency stored ❌ +``` + +--- + +## 6. Opportunities for Improvement + +### 6.1 High Priority (Phase 4) + +| # | Opportunity | Benefit | Effort | +|---|------------|---------|--------| +| 1 | Frontend currency dropdown selector | Users can finally use multicurrency | Medium | +| 2 | Complete ExchangeRateAPI with live rates | Accurate pricing, manual entry backup | Medium | +| 3 | Currency conversion calculation layer | Dynamic pricing, better UX | Medium | +| 4 | Add currency column to Bank Transfer table | Data completeness | Low | +| 5 | Real-time price updates on currency change | Better UX, clearer pricing | Medium | + +### 6.2 Medium Priority + +| # | Opportunity | Benefit | Effort | +|---|------------|---------|--------| +| 1 | Currency flag icons in frontend | Visual clarity, UX improvement | Low | +| 2 | Currency validation on form submit | Data integrity | Low | +| 3 | Conversion rate history/audit trail | Accounting, debugging | Medium | +| 4 | Multi-currency reports in dashboard | Business insights | Medium | +| 5 | Auto-fetch rates on schedule | Always-current rates without manual entry | Low | + +### 6.3 Nice-to-Have + +| # | Opportunity | Benefit | +|---|------------|---------| +| 1 | Display original + converted prices (e.g., "$29.99 (~Rp 450.000)") | Transparency | +| 2 | Currency switcher widget (cookies remember preference) | UX convenience | +| 3 | GEO IP detection to auto-select currency | Personalization | +| 4 | Admin-side currency conversion calculator | Admin convenience | +| 5 | Support for 3+ decimal currencies (e.g., cryptocurrencies) | Future-proofing | + +--- + +## 7. Recommended Implementation Order + +### Phase 4A — Core Multicurrency (Weeks 11-12) + +``` +1. Frontend currency selector dropdown +2. ExchangeRateAPI implementation (one API provider) +3. Conversion calculation functions +4. Fix Bank Transfer currency column +5. Dynamic price display on forms +``` + +### Phase 4B — Enhanced Features (Weeks 15-16) + +``` +6. Currency validation +7. Conversion rate history +8. Multi-currency dashboard reports +9. GEO IP auto-detection +10. Admin conversion calculator +``` + +--- + +## 8. Code Locations Reference + +| File | Lines | Purpose | +|------|-------|---------| +| `includes/Settings.php` | 56-133 | Multicurrency settings UI | +| `admin/functions.php` | 28-36, 47-81, 179-200, 202-218 | Currency utility functions | +| `admin/assets/json/currencies.json` | — | Currency data source (196 currencies) | +| `public/assets/js/form-action.js` | 224 | Currency code (hardcoded bug) | +| `includes/Product.php` | 386-432 | Product pricing per currency | +| `includes/Order.php` | 95 | Order currency property | +| `includes/Integration/Paypal.php` | 75, 84 | PayPal currency handling | +| `includes/Payment/BankTransfer.php` | 40-50 | Bank transfer schema (missing currency) | +| `includes/Integration/ExchangeRateAPI.php` | all | Empty class (needs implementation) | + +--- + +## 9. Testing Checklist + +When implementing multicurrency features: + +- [ ] Enable multicurrency in settings +- [ ] Add 3+ currencies +- [ ] Set prices for default currency +- [ ] Set prices for additional currencies +- [ ] Submit form with each currency selected +- [ ] Verify order currency stored correctly +- [ ] Verify payment gateway receives correct currency +- [ ] Test ExchangeRateAPI rate fetching +- [ ] Test manual exchange rate override +- [ ] Test price conversion calculations +- [ ] Test currency formatting display +- [ ] Test Bank Transfer with currency column +- [ ] Test frontend currency dropdown +- [ ] Test GEO IP auto-detection (if implemented) + +--- + +*End of Multicurrency Audit.*