// --------------------------------
//
// Copyright (c) 2010-2011 Samaj Shekhar
//
// Samaj Shekhar (samaj.shekhar@hotmail.com)
// Released under the terms of the Microsoft Public License (Ms-PL)
// http://thesharepage.codeplex.com
// ---------------------------------
using System;
using System.Web.Script.Serialization;
using System.Text.RegularExpressions;
namespace SharePage.CoreLib.Utils.ExtentionMethods
{
///
/// Encapsulates the custom extention methods for Types >
///
///
/// Copyright: Copyright (c) 2010-2011 Samaj Shekhar
/// Last Update: 4-Jan-2011|4:46am
///
public static class Extentions
{
///
/// Check wheather the string is empty or null (Extention Method)
///
/// The string to be checked
/// Returns true if string is NULL or String.Empty, otherwise false
public static bool IsEmptyOrNull(this string str)
{
if (str == null || str == string.Empty)
{
return true;
}
return false;
}
///
/// Removes Json null objects from the serialized string and return a new string(Extention Method)
///
/// The String to be checked
/// Returns the new processed string or NULL if null or empty string passed
public static string RemoveJsonNulls(this string str)
{
if (!str.IsEmptyOrNull())
{
Regex regex = new Regex(UtilityRegExp.JsonNullRegEx);
string data = regex.Replace(str, string.Empty);
regex = new Regex(UtilityRegExp.JsonNullArrayRegEx);
return regex.Replace(data, "[]");
}
return null;
}
///
/// Serializes an objct to a Json string using Javascript Serializer and removes Json null objects if opted (Extention Method)
///
/// Object to serialize
/// Set to true if you want remove null Json objects from serialized string, otherwise false(default)
/// The serialized Json as string, if check null was set true then null Json strings are removed
public static string SerializeToJson(this object arg, bool checknull = false)
{
JavaScriptSerializer sr = new JavaScriptSerializer();
if (checknull)
{
return sr.Serialize(arg).RemoveJsonNulls();
}
return sr.Serialize(arg);
}
}
///
/// Contains the Regular Expression for use in Application >
///
///
/// Copyright: Copyright (c) 2010-2011 Samaj Shekhar
/// Last Update: 30-Dec-2010|04:22pm
///
public class UtilityRegExp
{
///
/// A Regular Expression to Match any null Json object in a string
/// like "Samaj_Shekhar":null,
/// Useful in removing nulls from serialized Json string
///
public static string JsonNullRegEx = "[\"][a-zA-Z0-9_]*[\"]:null[ ]*[,]?";
///
/// A Regular Expression to Match an array of null Json object in a string
/// like [null, null]
/// Useful in removing null array from serialized Json string
///
public static string JsonNullArrayRegEx = "\\[( *null *,? *)*]";
///
/// A Regular Expression to Match an Email Address
/// Useful in validating email addresses
///
public static string ValidEmailRegEx = @"^([0-9a-zA-Z]([-.\w]*[0-9a-zA-Z])*@([0-9a-zA-Z][-\w]*[0-9a-zA-Z]\.)+[a-zA-Z]{2,9})$";
}
}