From da57ccf8dea668f456d663f2fdf8e10ecd27aef9 Mon Sep 17 00:00:00 2001
From: Ben Roberts <ben@sihnon.net>
Date: Mon, 26 Dec 2011 00:52:10 +0000
Subject: [PATCH] Added first attempt at input validation framework

---
 .../lib/SihnonFramework/Exceptions.class.php  |  3 +
 .../lib/SihnonFramework/Validation.class.php  |  9 +++
 .../SihnonFramework/Validation/Text.class.php | 55 +++++++++++++++++++
 3 files changed, 67 insertions(+)
 create mode 100644 source/lib/SihnonFramework/Validation.class.php
 create mode 100644 source/lib/SihnonFramework/Validation/Text.class.php

diff --git a/source/lib/SihnonFramework/Exceptions.class.php b/source/lib/SihnonFramework/Exceptions.class.php
index 0d90461..f7bfa87 100644
--- a/source/lib/SihnonFramework/Exceptions.class.php
+++ b/source/lib/SihnonFramework/Exceptions.class.php
@@ -44,5 +44,8 @@ class SihnonFramework_Exception_AuthException          extends SihnonFramework_E
 class SihnonFramework_Exception_UnknownUser            extends SihnonFramework_Exception_AuthException {};
 class SihnonFramework_Exception_IncorrectPassword      extends SihnonFramework_Exception_AuthException {};
 
+class SihnonFramework_Exception_ValidationException    extends SihnonFramework_Exception {};
+class SihnonFramework_Exception_InvalidContent         extends SihnonFramework_ValidationException {};
+class SihnonFramework_Exception_InvalidLength          extends SihnonFramework_ValidationoException {};
 
 ?>
diff --git a/source/lib/SihnonFramework/Validation.class.php b/source/lib/SihnonFramework/Validation.class.php
new file mode 100644
index 0000000..f9ac15f
--- /dev/null
+++ b/source/lib/SihnonFramework/Validation.class.php
@@ -0,0 +1,9 @@
+<?php
+
+abstract class SihnonFramework_Validation {
+    
+
+    
+}
+
+?>
\ No newline at end of file
diff --git a/source/lib/SihnonFramework/Validation/Text.class.php b/source/lib/SihnonFramework/Validation/Text.class.php
new file mode 100644
index 0000000..a906505
--- /dev/null
+++ b/source/lib/SihnonFramework/Validation/Text.class.php
@@ -0,0 +1,55 @@
+<?php
+
+class SihnonFramework_Validation_Text extends SihnonFramework_Validation {
+    
+    const Defaults     = 0xff;
+    const Alphabetical = 0x01;
+    const Digit        = 0x02;
+    const Numeric      = 0x04;
+    const Symbol       = 0x08;
+    const Whitespace   = 0x16;
+    
+    protected static $charsets = array(
+        static::Alphabetical => ':alpha:',
+        static::Digit        => ':digit:',
+        static::Numeric      => ':digit:\.-',
+        static::Symbol       => ':punct:',
+        static::Whitespace   => ':space:',
+    );
+
+    public static function charset($input, $charset = static::Defaults) {
+        static::pattern($input, static::buildCharsetPattern($charset));
+    }
+    
+    public static function length($input, $min_length = null, $max_length = null) {
+        $length = strlen($input);
+        
+        if ($min_length !== null && $length < $min_length) {
+            throw new SihnonFramework_Exception_InvalidLength();
+        }
+        
+        if ($max_length !== null && $length > $max_length) {
+            throw new SihnonFramework_Exception_InvalidLength();
+        }
+    }
+    
+    public static function pattern($input, $pattern) {
+        if ( ! preg_match($pattern, $input)) {
+            throw new SihnonFramework_Exception_InvalidContent();
+        }
+    }
+    
+    protected static function buildCharsetPattern($charset) {
+        $classes = '';
+        foreach (static::$charsets as $set => $class) {
+            if ($charset & $set) {
+                $classes .= $class;
+            }
+        }
+        
+        return "/^[{$classes}]*$/";
+    }
+    
+}
+
+?>
\ No newline at end of file