refactor(app): use custom exceptions and update driver creation

- Replace generic InvalidArgumentException with custom one
- Update GeneratorManager to prioritize method over class for driver creation

Author: guanguans

app/Commands/BuildCommand.php

@@ -12,6 +12,7 @@
 
 namespace App\Commands;
 
+use App\Exceptions\InvalidArgumentException;
 use Illuminate\Console\Application as Artisan;
 use Illuminate\Support\Facades\File;
 use LaravelZero\Framework\Commands\Command;
@@ -258,7 +259,7 @@ private function getBinary(): string
     private function getTimeout(): ?float
     {
         if (! is_numeric($this->option('timeout'))) {
-            throw new \InvalidArgumentException('The timeout value must be a number.');
+            throw new InvalidArgumentException('The timeout value must be a number.');
         }
 
         $timeout = (float) $this->option('timeout');

app/GeneratorManager.php

@@ -12,6 +12,7 @@
 
 namespace App;
 
+use App\Exceptions\InvalidArgumentException;
 use App\Generators\BitoGenerator;
 use App\Generators\OpenAIChatGenerator;
 use App\Generators\OpenAIGenerator;
@@ -45,17 +46,17 @@ protected function createDriver($driver)
         }
 
         $config = $this->config->get("ai-commit.generators.$driver");
-        $class = sprintf('App\Generators\%sGenerator', Str::studly($driver));
-        if (class_exists($class)) {
-            return new $class($config);
-        }
+        $studlyName = Str::studly($driver);
 
-        $method = 'create'.Str::studly($driver).'Driver';
-        if (method_exists($this, $method)) {
+        if (method_exists($this, $method = "create{$studlyName}Driver")) {
             return $this->{$method}($config);
         }
 
-        throw new \InvalidArgumentException("Driver [$driver] not supported.");
+        if (class_exists($class = "App\\Generators\\{$studlyName}Generator")) {
+            return new $class($config);
+        }
+
+        throw new InvalidArgumentException("Driver [$driver] not supported.");
     }
 
     private function createOpenAIDriver(array $config): OpenAIGenerator

app/Support/JsonFixer.php

@@ -12,6 +12,8 @@
 
 namespace App\Support;
 
+use App\Exceptions\RuntimeException;
+
 /**
  * This file is modified from https://github.com/adhocore/php-json-fixer.
  */
@@ -276,7 +278,7 @@ private function fixOrFail(string $json): string
             return $json;
         }
 
-        throw new \RuntimeException(sprintf('Could not fix JSON (tried padding `%s`)', substr($tmpJson, $length)));
+        throw new RuntimeException(sprintf('Could not fix JSON (tried padding `%s`)', substr($tmpJson, $length)));
     }
 
     private function padLiteral(string $tmpJson): string