[ticket/10631] Use exceptions for errors. Build action list dynamically.

PHPBB3-10631

phpBB/includes/exception/metadata.php

@@ -0,0 +1,69 @@
+<?php
+/**
+*
+* @package extension
+* @copyright (c) 2012 phpBB Group
+* @license http://opensource.org/licenses/gpl-2.0.php GNU General Public License v2
+*
+*/
+
+/**
+* @ignore
+*/
+if (!defined('IN_PHPBB'))
+{
+	exit;
+}
+
+/**
+ * Exception class for metadata
+ */
+class phpbb_exception_metadata extends LogicException
+{
+	const NOT_SET = 10001;
+	const INVALID = 10002;
+	const FILE_GET_CONTENTS = 10003;
+	const JSON_DECODE = 10004;
+	const FILE_DOES_NOT_EXIST = 10005;
+
+	public function __construct($code, $field_name)
+	{
+		$this->code = $code;
+		$this->field_name = $field_name;
+	}
+
+	public function __toString()
+	{
+		return sprintf($this->getErrorMessage(), $this->field_name);
+	}
+
+	public function getErrorMessage()
+	{
+		switch ($this->code)
+		{
+			case self::NOT_SET:
+				return 'The "%s" meta field has not been set.';
+			break;
+
+			case self::INVALID:
+				return 'The "%s" meta field is not valid.';
+			break;
+
+			case self::FILE_GET_CONTENTS:
+				return 'file_get_contents failed on %s';
+			break;
+
+			case self::JSON_DECODE:
+				return 'json_decode failed on %s';
+			break;
+
+			case self::FILE_DOES_NOT_EXIST:
+				return 'Required file does not exist at %s';
+			break;
+
+			default:
+				return 'An unexpected error has occurred.';
+			break;
+		}
+	}
+}