enhanced validation, added mimes config array.

system/validation/message.php

@@ -0,0 +1,144 @@
+<?php namespace System\Validation;
+
+use System\Str;
+use System\Lang;
+
+class Message {
+
+	/**
+	 * Get the appropriate validation message for a rule attribute.
+	 *
+	 * @param  Rule    $rule
+	 * @param  string  $attribute
+	 * @return string
+	 */
+	public static function get($rule, $attribute)
+	{
+		if ($rule instanceof Rangable_Rule)
+		{
+			$message = static::get_rangable_message($rule);
+		}
+		elseif ($rule instanceof Rules\Upload_of)
+		{
+			$message = static::get_upload_of_message($rule);
+		}
+		else
+		{
+			$message = static::get_message($rule);
+		}
+
+		return static::prepare($rule, $attribute, $message);
+	}
+
+	/**
+	 * Get the error message for a typical validation rule.
+	 *
+	 * @param  Rule    $rule
+	 * @return string
+	 */
+	private static function get_message($rule)
+	{
+		// ---------------------------------------------------------
+		// The built-in error messages are stored in the language
+		// directory and are keyed by the class name of the rule
+		// they are associated with.
+		// ---------------------------------------------------------
+		if (is_null($rule->error))
+		{
+			$class = explode('\\', get_class($rule));
+
+			$rule->error = Str::lower(end($class));
+		}
+
+		return (is_null($rule->message)) ? Lang::line('validation.'.$rule->error)->get() : $rule->message;
+	}
+
+	/**
+	 * Get the error message for a Rangable rule.
+	 *
+	 * @param  Rule    $rule
+	 * @return string
+	 */
+	private static function get_rangable_message($rule)
+	{
+		// ---------------------------------------------------------
+		// Rangable rules sometimes set a "presence_of" error.
+		//
+		// This occurs when an attribute is null and the option to
+		// allow null values has not been set.
+		// ---------------------------------------------------------
+		if ($rule->error == 'presence_of')
+		{
+			return static::get_message($rule);
+		}
+
+		// ---------------------------------------------------------
+		// Slice "number_" or "string_" off of the error type.
+		// ---------------------------------------------------------
+		$error_type = substr($rule->error, 7);
+
+		return (is_null($rule->$error_type)) ? Lang::line('validation.'.$rule->error)->get() : $rule->$error_type;
+	}
+
+	/**
+	 * Get the error message for an Upload_Of rule.
+	 *
+	 * @param  Rule    $rule
+	 * @return string
+	 */
+	private static function get_upload_of_message($rule)
+	{
+		// ---------------------------------------------------------
+		// Slice "file_" off of the error type.
+		// ---------------------------------------------------------
+		$error_type = substr($rule->error, 5);
+
+		return (is_null($rule->$error_type)) ? Lang::line('validation.'.$rule->error)->get() : $rule->$error_type;
+	}
+
+	/**
+	 * Prepare an error message for display. All place-holders will be replaced
+	 * with their actual values.
+	 *
+	 * @param  Rule    $rule
+	 * @param  string  $attribute
+	 * @param  string  $message
+	 * @return string
+	 */
+	private static function prepare($rule, $attribute, $message)
+	{
+		// ---------------------------------------------------------
+		// The rangable rule messages have three place-holders that
+		// must be replaced.
+		//
+		// :max  = The maximum size of the attribute.
+		// :min  = The minimum size of the attribute.
+		// :size = The exact size the attribute must be.
+		// ---------------------------------------------------------
+		if ($rule instanceof Rangable_Rule)
+		{
+			$message = str_replace(':max', $rule->maximum, $message);
+			$message = str_replace(':min', $rule->minimum, $message);
+			$message = str_replace(':size', $rule->size, $message);
+		}
+		// ---------------------------------------------------------
+		// The Upload_Of rule message have two place-holders taht
+		// must be replaced.
+		//
+		// :max   = The maximum file size of the upload (kilobytes).
+		// :types = The allowed file types for the upload.
+		// ---------------------------------------------------------
+		elseif ($rule instanceof Rules\Upload_Of)
+		{
+			$message = str_replace(':max', $rule->maximum, $message);
+
+			if (is_array($rule->types))
+			{
+				$message = str_replace(':types', implode(', ', $rule->types), $message);
+			}
+		}
+
+		return str_replace(':attribute', Lang::line('attributes.'.$attribute)->get(str_replace('_', ' ', $attribute)), $message);
+	}
+
+}