Getting Started

Minimal Setup

Installation:

composer require astina/solvency-bundle:dev-master

Add to AppKernel.php:

new Astina\Bundle\SolvencyBundle\AstinaSolvencyBundle(),

Configure: Add to config.yml:

astina_solvency:
    provider:
        deltavista:
            wsdl_url: "http://example.org/path/to.wsdl"
            user: "your_username"
            password: "your_password"

First Use Case: Inject the SolvencyService in a controller or service:

use Astina\Bundle\SolvencyBundle\Service\SolvencyService;

class MyController extends Controller
{
    public function checkSolvencyAction(Request $request, SolvencyService $solvencyService)
    {
        $result = $solvencyService->checkSolvency([
            'param1' => 'value1',
            'param2' => 'value2',
        ]);
        return $this->json($result);
    }
}

Implementation Patterns

Core Workflow

Service Integration: Use dependency injection to access SolvencyService in controllers, commands, or other services. Example in a command:

use Astina\Bundle\SolvencyBundle\Service\SolvencyService;
use Symfony\Component\Console\Command\Command;
use Symfony\Component\Console\Input\InputInterface;
use Symfony\Component\Console\Output\OutputInterface;

class SolvencyCheckCommand extends Command
{
    protected static $defaultName = 'app:solvency:check';

    private $solvencyService;

    public function __construct(SolvencyService $solvencyService)
    {
        $this->solvencyService = $solvencyService;
        parent::__construct();
    }

    protected function execute(InputInterface $input, OutputInterface $output)
    {
        $result = $this->solvencyService->checkSolvency(['customer_id' => 123]);
        $output->writeln('Solvency check result: ' . print_r($result, true));
    }
}

Request Handling: Pass an associative array of parameters to checkSolvency(). The bundle maps these to the DeltaVista API. Example:

$result = $solvencyService->checkSolvency([
    'customer_id' => 'CUST123',
    'amount' => 1000.00,
    'currency' => 'EUR',
]);

Response Handling: The bundle returns a structured response (e.g., ['status' => 'approved', 'risk_score' => 0.8]). Validate this in your logic:
```
if ($result['status'] === 'approved') {
    // Proceed with transaction
}
```

Advanced Patterns

Custom Providers: Extend the bundle to support additional providers by implementing Astina\Bundle\SolvencyBundle\Provider\ProviderInterface and register them in the bundle configuration.

Event Listeners: Listen for solvency check events (e.g., solvency.check.before, solvency.check.after) to log, transform, or validate requests/responses:

# config/services.yml
services:
    app.solvency_listener:
        class: AppBundle\EventListener\SolvencyListener
        tags:
            - { name: kernel.event_listener, event: solvency.check.before, method: onSolvencyCheckBefore }

Caching Strategy: Leverage the built-in caching to reduce API calls. Customize cache lifetime and directory in config.yml:
```
astina_solvency:
    cache:
        cache_dir: "%kernel.cache_dir%/solvency"
        lifetime: 3600 # Cache for 1 hour
```

Testing: Mock the SolvencyService in unit tests or use the endpoint_url config to point to a test endpoint:

astina_solvency:
    provider:
        deltavista:
            endpoint_url: "http://test-endpoint.org"

Gotchas and Tips

Common Pitfalls

WSDL/Endpoint Mismatch: Ensure wsdl_url and endpoint_url are correct. A misconfigured endpoint will cause silent failures or SOAP faults. Test with a tool like SoapUI first.
Authentication Issues: DeltaVista may reject requests with invalid credentials. Verify user and password in config.yml and check for typos.
Caching Overrides: If lifetime is set to null, responses are cached indefinitely. This may lead to stale data. Set a reasonable lifetime (e.g., 3600 for 1 hour) for dynamic data.
Parameter Validation: The bundle does not validate input parameters by default. Ensure your application validates inputs before passing them to checkSolvency() to avoid malformed API calls.

SOAP Exceptions: SOAP faults may not be caught gracefully. Wrap calls in a try-catch block:

try {
    $result = $solvencyService->checkSolvency($params);
} catch (\SoapFault $e) {
    // Log error and handle gracefully
    $this->logger->error('Solvency check failed: ' . $e->getMessage());
    return $this->json(['error' => 'Solvency check failed'], 500);
}

Debugging Tips

Enable SOAP Debugging: Add this to config.yml to log SOAP requests/responses:
```
astina_solvency:
    debug: true
```
Logs will appear in var/log/dev.log.
Check Cache Directory: Ensure the cache_dir is writable by the web server. Permissions like 755 are typically sufficient.
Validate WSDL: Use php -r 'new SoapClient("http://example.org/path/to.wsdl");' to test WSDL connectivity. If this fails, the WSDL URL is incorrect.
Monitor API Usage: DeltaVista may throttle or block excessive requests. Use caching and monitor API call volumes to avoid hitting limits.

Extension Points

Custom Response Transformers: Override the default response handling by extending Astina\Bundle\SolvencyBundle\Transformer\ResponseTransformer and binding your class in services.yml:

services:
    app.solvency.response_transformer:
        class: AppBundle\Transformer\CustomSolvencyResponseTransformer
        tags:
            - { name: astina_solvency.response_transformer }

Add New Providers: Implement ProviderInterface and register it in the bundle’s Resources/config/services.xml:

<service id="app.solvency.provider.custom" class="AppBundle\Provider\CustomProvider">
    <tag name="astina_solvency.provider" provider="custom" />
</service>

Override Default Configuration: Use parameter bags to override bundle defaults in config.yml:
```
parameters:
    astina_solvency.cache_dir: "%kernel.cache_dir%/custom_solvency_cache"
```

Solvency Bundle Laravel Package