Created config post processor that parses a simplified config to what shlink expects

config/config.php

@@ -25,4 +25,6 @@ return (new ConfigAggregator\ConfigAggregator([
     env('APP_ENV') === 'test'
         ? new ConfigAggregator\PhpFileProvider('config/test/*.global.php')
         : new ConfigAggregator\ArrayProvider([]),
-], 'data/cache/app_config.php'))->getMergedConfig();
+], 'data/cache/app_config.php', [
+    Core\ConfigPostProcessor::class,
+]))->getMergedConfig();

module/Core/src/ConfigPostProcessor.php

@@ -0,0 +1,50 @@
+<?php
+declare(strict_types=1);
+
+namespace Shlinkio\Shlink\Core;
+
+use Shlinkio\Shlink\Installer\Util\PathCollection;
+use Zend\Stdlib\ArrayUtils;
+
+use function array_intersect_key;
+use function array_key_exists;
+use function Functional\contains;
+use function Functional\reduce_left;
+
+class ConfigPostProcessor
+{
+    private const SIMPLIFIED_CONFIG_MAPPING = [
+        'disable_track_param' => ['app_options', 'disable_track_param'],
+        'short_domain_schema' => ['url_shortener', 'domain', 'schema'],
+        'short_domain_host' => ['url_shortener', 'domain', 'hostname'],
+        'validate_url' => ['url_shortener', 'validate_url'],
+        'not_found_redirect_to' => ['url_shortener', 'not_found_short_url', 'redirect_to'],
+        'db_config' => ['entity_manager', 'connection'],
+        'delete_short_url_threshold' => ['delete_short_urls', 'visits_threshold'],
+        'locale' => ['translator', 'locale'],
+    ];
+    private const SIMPLIFIED_CONFIG_TOGGLES = [
+        'not_found_redirect_to' => ['url_shortener', 'not_found_short_url', 'enable_redirection'],
+        'delete_short_url_threshold' => ['delete_short_urls', 'check_visits_threshold'],
+    ];
+    private const SIMPLIFIED_MERGEABLE_CONFIG = ['db_config'];
+
+    public function __invoke(array $config): array
+    {
+        $existingKeys = array_intersect_key($config, self::SIMPLIFIED_CONFIG_MAPPING);
+
+        return reduce_left($existingKeys, function ($value, string $key, $c, PathCollection $collection) {
+            $path = self::SIMPLIFIED_CONFIG_MAPPING[$key];
+            if (contains(self::SIMPLIFIED_MERGEABLE_CONFIG, $key)) {
+                $value = ArrayUtils::merge($collection->getValueInPath($path), $value);
+            }
+
+            $collection->setValueInPath($value, $path);
+            if (array_key_exists($key, self::SIMPLIFIED_CONFIG_TOGGLES)) {
+                $collection->setValueInPath(true, self::SIMPLIFIED_CONFIG_TOGGLES[$key]);
+            }
+
+            return $collection;
+        }, new PathCollection($config))->toArray();
+    }
+}

module/Core/test/ConfigPostProcessorTest.php

@@ -0,0 +1,93 @@
+<?php
+declare(strict_types=1);
+
+namespace ShlinkioTest\Shlink\Core;
+
+use PHPUnit\Framework\TestCase;
+use Shlinkio\Shlink\Core\ConfigPostProcessor;
+
+use function array_merge;
+
+class ConfigPostProcessorTest extends TestCase
+{
+    private $postProcessor;
+
+    public function setUp(): void
+    {
+        $this->postProcessor = new ConfigPostProcessor();
+    }
+
+    /** @test */
+    public function properlyMapsSimplifiedConfig(): void
+    {
+        $config = [
+            'app_options' => [
+                'disable_track_param' => 'foo',
+            ],
+
+            'entity_manager' => [
+                'connection' => [
+                    'driver' => 'mysql',
+                    'host' => 'shlink_db',
+                    'port' => '3306',
+                ],
+            ],
+        ];
+        $simplified = [
+            'disable_track_param' => 'bar',
+            'short_domain_schema' => 'https',
+            'short_domain_host' => 'doma.in',
+            'validate_url' => false,
+            'delete_short_url_threshold' => 50,
+            'locale' => 'es',
+            'not_found_redirect_to' => 'foobar.com',
+            'db_config' => [
+                'dbname' => 'shlink',
+                'user' => 'foo',
+                'password' => 'bar',
+                'port' => '1234',
+            ],
+        ];
+        $expected = [
+            'app_options' => [
+                'disable_track_param' => 'bar',
+            ],
+
+            'entity_manager' => [
+                'connection' => [
+                    'driver' => 'mysql',
+                    'host' => 'shlink_db',
+                    'dbname' => 'shlink',
+                    'user' => 'foo',
+                    'password' => 'bar',
+                    'port' => '1234',
+                ],
+            ],
+
+            'url_shortener' => [
+                'domain' => [
+                    'schema' => 'https',
+                    'hostname' => 'doma.in',
+                ],
+                'validate_url' => false,
+                'not_found_short_url' => [
+                    'redirect_to' => 'foobar.com',
+                    'enable_redirection' => true,
+                ],
+            ],
+
+            'translator' => [
+                'locale' => 'es',
+            ],
+
+            'delete_short_urls' => [
+                'visits_threshold' => 50,
+                'check_visits_threshold' => true,
+            ],
+        ];
+
+        $result = ($this->postProcessor)(array_merge($config, $simplified));
+
+        $this->assertEquals(array_merge($expected, $simplified), $result);
+    }
+}