refactored error handling for better architecture.

system/exception/handler.php

@@ -0,0 +1,117 @@
+<?php namespace System\Exception;
+
+use System\View;
+use System\Config;
+use System\Response;
+
+class Handler {
+
+	/**
+	 * The exception wrapper for the exception being handled.
+	 *
+	 * @var Wrapper
+	 */
+	public $exception;
+
+	/**
+	 * Create a new exception handler instance.
+	 *
+	 * @param  Exception  $e
+	 * @return void
+	 */
+	public function __construct($e)
+	{
+		$this->exception = new Wrapper($e);
+	}
+
+	/**
+	 * Create a new exception handler instance.
+	 *
+	 * @param  Exception  $e
+	 * @return Handler
+	 */
+	public static function make($e)
+	{
+		return new static($e);
+	}
+
+	/**
+	 * Handle the exception and display the error report.
+	 *
+	 * The exception will be logged if error logging is enabled.
+	 *
+	 * The output buffer will be cleaned so nothing is sent to the browser except the
+	 * error message. This prevents any views that have already been rendered from
+	 * being shown in an incomplete or erroneous state.
+	 *
+	 * After the exception is displayed, the request will be halted.
+	 *
+	 * @return void
+	 */
+	public function handle()
+	{
+		if (ob_get_level() > 0) ob_clean();
+
+		if (Config::get('error.log')) $this->log();
+
+		$this->get_response(Config::get('error.detail'))->send();
+
+		exit(1);
+	}
+
+	/**
+	 * Log the exception using the logger closure specified in the error configuration.
+	 *
+	 * @return void
+	 */
+	private function log()
+	{
+		$parameters = array(
+			$this->exception->severity(),
+			$this->exception->message(),
+			$this->exception->getTraceAsString(),
+		);
+
+		call_user_func_array(Config::get('error.logger'), $parameters);
+	}
+
+	/**
+	 * Get the error report response for the exception.
+	 *
+	 * @param  bool      $detailed
+	 * @return Resposne
+	 */
+	private function get_response($detailed)
+	{
+		return ($detailed) ? $this->detailed_response() : $this->generic_response();
+	}
+
+	/**
+	 * Get the detailed error report for the exception.
+	 *
+	 * @return Response
+	 */
+	private function detailed_response()
+	{
+		$data = array(
+			'severity' => $this->exception->severity(),
+			'message'  => $this->exception->message(),
+			'line'     => $this->exception->getLine(),
+			'trace'    => $this->exception->getTraceAsString(),
+			'contexts' => $this->exception->context(),
+		);
+
+		return Response::make(View::make('error.exception', $data), 500);
+	}
+
+	/**
+	 * Get the generic error report for the exception.
+	 *
+	 * @return Response
+	 */
+	private function generic_response()
+	{
+		return Response::error('500');
+	}
+
+}