#146 Feature: Allow database URL in config

app/config/schema.json

@@ -73,6 +73,9 @@
             "type": "object",
             "required": true,
             "properties": {
+                "url": {
+                    "type": "string"
+                },
                 "driver": {
                     "type": "string",
                     "enum": ["pdo_mysql"]

app/config/services.yaml

@@ -78,6 +78,9 @@ services:
     config.compiler.processor.version:
         class: 'Smile\GdprDump\Config\Compiler\Processor\VersionProcessor'
 
+    config.compiler.processor.database_url:
+        class: 'Smile\GdprDump\Config\Compiler\Processor\DatabaseUrlProcessor'
+
     converter.builder:
         class: 'Smile\GdprDump\Converter\ConverterBuilder'
         arguments:

src/Config/Compiler/Processor/DatabaseUrlProcessor.php

@@ -0,0 +1,49 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Smile\GdprDump\Config\Compiler\Processor;
+
+use Smile\GdprDump\Config\Compiler\CompileException;
+use Smile\GdprDump\Config\ConfigInterface;
+
+class DatabaseUrlProcessor implements ProcessorInterface
+{
+    /**
+     * Replace environment variable placeholders (e.g. "%env(DB_HOST)%")
+     */
+    public function process(ConfigInterface $config): void
+    {
+        $data = $config->toArray();
+        $data['database'] = $this->processDatabaseNode($config->toArray()['database'] ?? []);
+        $config->reset($data);
+    }
+
+    /**
+     * Process a config item.
+     *
+     * @throws CompileException
+     */
+    private function processDatabaseNode(array $data): array
+    {
+        if (isset($data['url'])) {
+            $parsed = parse_url($data['url']);
+            $mapped = [
+                'name' => ltrim($parsed['path'], '/'),
+                'user' => $parsed['user'] ?? null,
+                'password' => $parsed['pass'] ?? null,
+                'host' => $parsed['host'] ?? null,
+                'port' => $parsed['port'] ?? null,
+                'driver' => 'pdo_' . ltrim($parsed['scheme'], 'pdo_'),
+            ];
+
+            foreach($mapped as $key => $value) {
+                if (!isset($data[$key]) && (!empty($mapped[$key]))) {
+                    $data[$key] = $value;
+                }
+            }
+        }
+
+        return $data;
+    }
+}

tests/unit/Config/Compiler/Processor/DatabaseUrlProcessorTest.php

@@ -0,0 +1,34 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Smile\GdprDump\Tests\Unit\Config\Compiler\Processor;
+
+use Smile\GdprDump\Config\Compiler\Processor\DatabaseUrlProcessor;
+use Smile\GdprDump\Config\Config;
+use Smile\GdprDump\Tests\Unit\TestCase;
+
+class DatabaseUrlProcessorTest extends TestCase
+{
+    /**
+     * Assert that environment variables are processed successfully.
+     */
+    public function testEnvVarProcessor(): void
+    {
+        $data = [
+            'database' =>
+                [
+                    'password' => 'another_secret_password',
+                    'url' => 'mysql://foo:secret_password@localhost/databasename',
+                ]
+        ];
+
+        $config = new Config($data);
+        $processor = new DatabaseUrlProcessor();
+        $processor->process($config);
+
+        $this->assertSame('localhost', $config->get('database')['host']);
+        $this->assertSame('another_secret_password', $config->get('database')['password']);
+    }
+
+}