Add custom handlers for dependency exceptions

src/Extension/Exception/DependentExtensionsExceptionHandler.php

@@ -0,0 +1,34 @@
+<?php
+
+/*
+ * This file is part of Flarum.
+ *
+ * For detailed copyright and license information, please view the
+ * LICENSE file that was distributed with this source code.
+ */
+
+namespace Flarum\Extension\Exception;
+
+use Flarum\Foundation\ErrorHandling\HandledError;
+
+class DependentExtensionsExceptionHandler
+{
+    public function handle(DependentExtensionsException $e): HandledError
+    {
+        return (new HandledError(
+            $e,
+            'dependent_extensions',
+            409
+        ))->withDetails($this->errorDetails($e));
+    }
+
+    protected function errorDetails(DependentExtensionsException $e): array
+    {
+        return [
+            [
+                'extension' => $e->extension->getId(),
+                'dependent_dependencies' => $e->dependent_dependencies
+            ]
+        ];
+    }
+}

src/Extension/Exception/MissingDependenciesExceptionHandler.php

@@ -0,0 +1,34 @@
+<?php
+
+/*
+ * This file is part of Flarum.
+ *
+ * For detailed copyright and license information, please view the
+ * LICENSE file that was distributed with this source code.
+ */
+
+namespace Flarum\Extension\Exception;
+
+use Flarum\Foundation\ErrorHandling\HandledError;
+
+class MissingDependenciesExceptionHandler
+{
+    public function handle(MissingDependenciesException $e): HandledError
+    {
+        return (new HandledError(
+            $e,
+            'missing_dependencies',
+            409
+        ))->withDetails($this->errorDetails($e));
+    }
+
+    protected function errorDetails(MissingDependenciesException $e): array
+    {
+        return [
+            [
+                'extension' => $e->extension->getId(),
+                'missing_dependencies' => $e->missing_dependencies
+            ]
+        ];
+    }
+}

src/Foundation/ErrorServiceProvider.php

@@ -9,6 +9,10 @@
 
 namespace Flarum\Foundation;
 
+use Flarum\Extension\Exception\DependentExtensionsException;
+use Flarum\Extension\Exception\DependentExtensionsExceptionHandler;
+use Flarum\Extension\Exception\MissingDependenciesException;
+use Flarum\Extension\Exception\MissingDependenciesExceptionHandler;
 use Flarum\Foundation\ErrorHandling\ExceptionHandler;
 use Flarum\Foundation\ErrorHandling\LogReporter;
 use Flarum\Foundation\ErrorHandling\Registry;
@@ -57,6 +61,8 @@ public function register()
             return [
                 IlluminateValidationException::class => ExceptionHandler\IlluminateValidationExceptionHandler::class,
                 ValidationException::class => ExceptionHandler\ValidationExceptionHandler::class,
+                DependentExtensionsException::class => DependentExtensionsExceptionHandler::class,
+                MissingDependenciesException::class => MissingDependenciesExceptionHandler::class,
             ];
         });