Convert exceptions (#19)

src/Controller.php

@@ -8,6 +8,7 @@
 use Illuminate\Routing\Controller as IlluminateController;
 use Spatie\SlashCommand\Exceptions\InvalidHandler;
 use Spatie\SlashCommand\Exceptions\InvalidRequest;
+use Spatie\SlashCommand\Exceptions\SlashException;
 use Spatie\SlashCommand\Exceptions\RequestCouldNotBeHandled;
 
 class Controller extends IlluminateController
@@ -31,7 +32,11 @@ public function getResponse(): IlluminateResponse
 
         $handler = $this->determineHandler();
 
-        $response = $handler->handle($this->request);
+        try {
+            $response = $handler->handle($this->request);
+        } catch (SlashException $e) {
+            $response = $e->getResponse($this->request);
+        }
 
         return $response->getIlluminateResponse();
     }

src/Exceptions/FieldCannotBeAdded.php

@@ -2,10 +2,9 @@
 
 namespace Spatie\SlashCommand\Exceptions;
 
-use Exception;
 use Spatie\SlashCommand\AttachmentField;
 
-class FieldCannotBeAdded extends Exception
+class FieldCannotBeAdded extends SlashException
 {
     public static function invalidType()
     {

src/Exceptions/InvalidHandler.php

@@ -2,10 +2,9 @@
 
 namespace Spatie\SlashCommand\Exceptions;
 
-use Exception;
 use Spatie\SlashCommand\Handlers\BaseHandler;
 
-class InvalidHandler extends Exception
+class InvalidHandler extends SlashException
 {
     public static function handlerDoesNotExist($handler)
     {

src/Exceptions/InvalidInput.php

@@ -0,0 +1,30 @@
+<?php
+
+namespace Spatie\SlashCommand\Exceptions;
+
+use Exception;
+use Spatie\SlashCommand\Attachment;
+use Spatie\SlashCommand\Request;
+use Spatie\SlashCommand\Response;
+use Spatie\SlashCommand\Handlers\SignatureHandler;
+
+class InvalidInput extends SlashException
+{
+    protected $handler;
+
+    public function __construct($message, SignatureHandler $handler, Exception $previous = null)
+    {
+        parent::__construct($message, 0, $previous);
+
+        $this->handler = $handler;
+    }
+
+    public function getResponse(Request $request): Response
+    {
+        return parent::getResponse($request)
+            ->withAttachment(
+                Attachment::create()
+                    ->setText($this->handler->getHelpDescription())
+            );
+    }
+}

src/Exceptions/InvalidRequest.php

@@ -2,9 +2,7 @@
 
 namespace Spatie\SlashCommand\Exceptions;
 
-use Exception;
-
-class InvalidRequest extends Exception
+class InvalidRequest extends SlashException
 {
     public static function tokenNotFound()
     {

src/Exceptions/InvalidSignature.php

@@ -2,9 +2,7 @@
 
 namespace Spatie\SlashCommand\Exceptions;
 
-use Exception;
-
-class InvalidSignature extends Exception
+class InvalidSignature extends SlashException
 {
     public static function signatureMustContainASpace($signature)
     {

src/Exceptions/RequestCouldNotBeHandled.php

@@ -2,10 +2,9 @@
 
 namespace Spatie\SlashCommand\Exceptions;
 
-use Exception;
 use Spatie\SlashCommand\Request;
 
-class RequestCouldNotBeHandled extends Exception
+class RequestCouldNotBeHandled extends SlashException
 {
     public static function noHandlerFound(Request $request)
     {

src/Exceptions/SlashException.php

@@ -0,0 +1,21 @@
+<?php
+
+namespace Spatie\SlashCommand\Exceptions;
+
+use Exception;
+use Spatie\SlashCommand\Attachment;
+use Spatie\SlashCommand\Request;
+use Spatie\SlashCommand\Response;
+
+class SlashException extends Exception
+{
+    public function getResponse(Request $request): Response
+    {
+        return Response::create($request)
+            ->withAttachment(Attachment::create()
+                ->setText($this->getMessage())
+                ->setFallback($this->getMessage())
+                ->setColor('danger')
+            );
+    }
+}

src/Handlers/BaseHandler.php

@@ -4,6 +4,7 @@
 
 use Illuminate\Contracts\Bus\Dispatcher;
 use Illuminate\Foundation\Bus\DispatchesJobs;
+use Spatie\SlashCommand\Exceptions\SlashException;
 use Spatie\SlashCommand\HandlesSlashCommand;
 use Spatie\SlashCommand\Jobs\SlashCommandResponseJob;
 use Spatie\SlashCommand\Request;
@@ -33,6 +34,11 @@ protected function dispatch(SlashCommandResponseJob $job)
         return app(Dispatcher::class)->dispatch($job);
     }
 
+    protected function abort($response)
+    {
+        throw new SlashException($response);
+    }
+
     public function getRequest(): Request
     {
         return $this->getRequest();

src/Handlers/SignatureHandler.php

@@ -5,6 +5,7 @@
 use Illuminate\Console\Parser;
 use Illuminate\Support\Str;
 use Spatie\SlashCommand\Exceptions\InvalidHandler;
+use Spatie\SlashCommand\Exceptions\InvalidInput;
 use Spatie\SlashCommand\Request;
 use Symfony\Component\Console\Command\Command;
 use Symfony\Component\Console\Exception\RuntimeException;
@@ -164,4 +165,13 @@ protected function bindSignature()
 
         return true;
     }
+
+    protected function validate()
+    {
+        try {
+            $this->input->validate();
+        } catch (RuntimeException $e) {
+            throw new InvalidInput($e->getMessage(), $this, $e);
+        }
+    }
 }