batch transactions

IMPLEMENTATION_SUMMARY.md

@@ -0,0 +1,183 @@
+# Batch Transactions Implementation Summary
+
+## Overview
+
+Successfully implemented prelive-only batch transaction endpoints for the Zai Payment Ruby gem. These endpoints allow testing and simulation of batch transaction processing flows in the prelive environment.
+
+## Files Created
+
+### 1. Resource Implementation
+**File:** `lib/zai_payment/resources/batch_transaction.rb`
+
+Implements the `BatchTransaction` resource class with the following methods:
+- `export_transactions` - Exports pending batch transactions to batched state
+- `update_transaction_states` - Updates batch transaction states (12700 or 12000)
+- `process_to_bank_processing` - Convenience method for state 12700
+- `process_to_successful` - Convenience method for state 12000 (triggers webhooks)
+
+**Key Features:**
+- Environment validation (prelive-only)
+- Comprehensive parameter validation
+- Clear error messages
+- Full YARD documentation
+
+### 2. Spec File
+**File:** `spec/zai_payment/resources/batch_transaction_spec.rb`
+
+Comprehensive test coverage including:
+- Export transactions functionality
+- Update transaction states with both state codes
+- Convenience methods (process_to_bank_processing, process_to_successful)
+- Environment validation (prelive vs production)
+- Parameter validation for all methods
+- Multiple transaction ID handling
+- Integration with ZaiPayment module
+
+### 3. Documentation
+
+#### Examples
+**File:** `examples/batch_transactions.md`
+- Complete workflow examples
+- Step-by-step usage guide
+- Error handling examples
+- Multiple transaction processing
+- Webhook testing guide
+
+#### Technical Documentation
+**File:** `docs/batch_transactions.md`
+- Complete method reference with signatures
+- Parameter descriptions and types
+- Return value specifications
+- Error handling details
+- State code documentation
+- Lifecycle diagrams
+- Integration examples
+
+## Files Modified
+
+### 1. Main Module
+**File:** `lib/zai_payment.rb`
+- Added require for batch_transaction resource
+- Added `batch_transactions` accessor method
+
+### 2. Response Class
+**File:** `lib/zai_payment/response.rb`
+- Added "batches" to RESPONSE_DATA_KEYS array
+
+### 3. README
+**File:** `readme.md`
+- Added batch transactions to Features section
+- Added new Quick Start section with example
+- Added to Roadmap as completed feature
+- Added to Examples & Patterns section
+- Added documentation links
+
+## API Endpoints Implemented
+
+### 1. Export Transactions
+**Method:** `GET /batch_transactions/export_transactions`
+**Purpose:** Move all pending batch_transactions to batched state
+**Returns:** Array of transactions with batch_id and transaction id
+
+### 2. Update Transaction States
+**Method:** `PATCH /batches/:id/transaction_states`
+**Purpose:** Move batch transactions between states
+**Supports:**
+- State 12700 (bank_processing)
+- State 12000 (successful - triggers webhooks)
+
+## Usage Example
+
+```ruby
+# Configure for prelive
+ZaiPayment.configure do |config|
+  config.environment = :prelive
+  config.client_id = 'your_client_id'
+  config.client_secret = 'your_client_secret'
+  config.scope = 'your_scope'
+end
+
+# Export transactions
+export_response = ZaiPayment.batch_transactions.export_transactions
+batch_id = export_response.data.first['batch_id']
+transaction_ids = export_response.data.map { |t| t['id'] }
+
+# Move to bank_processing
+ZaiPayment.batch_transactions.process_to_bank_processing(
+  batch_id,
+  exported_ids: transaction_ids
+)
+
+# Complete processing (triggers webhook)
+ZaiPayment.batch_transactions.process_to_successful(
+  batch_id,
+  exported_ids: transaction_ids
+)
+```
+
+## Error Handling
+
+### ConfigurationError
+Raised when attempting to use batch transaction endpoints outside prelive environment.
+
+### ValidationError
+Raised for:
+- Blank or nil batch_id
+- Empty or nil exported_ids array
+- exported_ids not an array
+- exported_ids containing nil or empty values
+- Invalid state codes (not 12700 or 12000)
+
+## Key Design Decisions
+
+1. **Prelive-Only Enforcement**: Environment check in every method to prevent accidental production use
+2. **Convenience Methods**: Separate methods for common operations (process_to_bank_processing, process_to_successful)
+3. **Array Support**: All methods support processing multiple transactions at once
+4. **State Code Constants**: Clear documentation of state codes (12700, 12000)
+5. **Comprehensive Validation**: All parameters validated with clear error messages
+6. **Consistent API**: Follows same patterns as other resources in the gem
+
+## Testing
+
+The implementation includes comprehensive RSpec tests covering:
+- ✅ Happy path for all methods
+- ✅ Error cases (invalid environment, invalid parameters)
+- ✅ Multiple transaction handling
+- ✅ Response structure validation
+- ✅ Integration with main module
+
+## Documentation
+
+Three levels of documentation provided:
+1. **YARD Comments**: Inline documentation in the code
+2. **Examples**: Practical usage examples (`examples/batch_transactions.md`)
+3. **Technical Guide**: Complete reference documentation (`docs/batch_transactions.md`)
+
+## Next Steps
+
+The implementation is complete and ready for use. To use it:
+
+1. Ensure your environment is set to `:prelive`
+2. Access via `ZaiPayment.batch_transactions`
+3. Follow the workflow: export → bank_processing → successful
+4. Handle webhooks triggered by the successful state
+
+## Files Summary
+
+**Created:**
+- `lib/zai_payment/resources/batch_transaction.rb` (172 lines)
+- `spec/zai_payment/resources/batch_transaction_spec.rb` (443 lines)
+- `examples/batch_transactions.md` (276 lines)
+- `docs/batch_transactions.md` (434 lines)
+
+**Modified:**
+- `lib/zai_payment.rb` (added 2 lines)
+- `lib/zai_payment/response.rb` (added "batches" key)
+- `readme.md` (added sections and examples)
+
+**Total:** 1,325+ lines of code, tests, and documentation added.
+
+## No Linter Errors
+
+All files pass linting checks with no errors or warnings.
+

RESPONSE_FORMAT_CORRECTION.md

@@ -0,0 +1,75 @@
+# Batch Transactions API Response Correction
+
+## Response Format for PATCH /batches/:id/transaction_states
+
+### ✅ Correct Response Format
+
+The actual API response for `PATCH /batches/:id/transaction_states` contains:
+
+```json
+{
+  "aggregated_jobs_uuid": "c1cbc502-9754-42fd-9731-2330ddd7a41f",
+  "msg": "1 jobs have been sent to the queue.",
+  "errors": []
+}
+```
+
+### Response Fields
+
+| Field | Type | Description |
+|-------|------|-------------|
+| `aggregated_jobs_uuid` | String | UUID identifying the batch of jobs sent to the queue |
+| `msg` | String | Success message indicating how many jobs were queued |
+| `errors` | Array | Array of any errors (typically empty on success) |
+
+### Ruby Usage Example
+
+```ruby
+response = ZaiPayment.batch_transactions.update_transaction_states(
+  'batch_id',
+  exported_ids: ['439970a2-e0a1-418e-aecf-6b519c115c55'],
+  state: 12700
+)
+
+# Access response data
+response.body['aggregated_jobs_uuid'] # => "c1cbc502-9754-42fd-9731-2330ddd7a41f"
+response.body['msg']                   # => "1 jobs have been sent to the queue."
+response.body['errors']                # => []
+
+# Check for success
+if response.success? && response.body['errors'].empty?
+  puts "Successfully queued #{response.body['msg']}"
+  puts "Job UUID: #{response.body['aggregated_jobs_uuid']}"
+end
+```
+
+### Multiple Transactions
+
+When processing multiple transactions, the message reflects the count:
+
+```ruby
+response = ZaiPayment.batch_transactions.update_transaction_states(
+  'batch_id',
+  exported_ids: ['id1', 'id2', 'id3'],
+  state: 12000
+)
+
+response.body['msg'] # => "3 jobs have been sent to the queue."
+```
+
+## Updated Files
+
+All documentation and specs have been updated to reflect the correct response format:
+
+1. ✅ `lib/zai_payment/resources/batch_transaction.rb` - YARD documentation
+2. ✅ `spec/zai_payment/resources/batch_transaction_spec.rb` - Test expectations
+3. ✅ `examples/batch_transactions.md` - Example code
+4. ✅ `docs/batch_transactions.md` - Technical documentation
+
+## Key Points
+
+- The response is **asynchronous** - jobs are queued for processing
+- The `aggregated_jobs_uuid` can be used to track the batch of jobs
+- Check the `errors` array to ensure no errors occurred
+- The `msg` field contains a human-readable description of what was queued
+