using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;
using System.Text.RegularExpressions;

namespace ReJSONify
{
    class Program
    {
        static void Main(string[] args)
        {
            string photos = File.ReadAllText(@"C:\Documents and Settings\Kalrac\Application Data\Flickr\Flickr Uploadr\Profiles\4ro4tsrx.default\replacementphotos.json");
            photos = Regex.Replace(photos, "guid\\:\"........-....-....-....-............\"", "guid:null");

            //You can't just do a single replace, as each GUID needs to be different.
            for (int index = photos.IndexOf("guid:null"); index < photos.Length && index != -1; index = photos.IndexOf("guid:null"))
            {
                photos = photos.Remove(index, "guid:null".Length);
                photos = photos.Insert(index, "guid:\"" + Guid.NewGuid().ToString("D") + "\"");
            }

            File.WriteAllText(@"C:\Documents and Settings\Kalrac\Application Data\Flickr\Flickr Uploadr\Profiles\4ro4tsrx.default\replacementphotos.json", photos);

            Console.WriteLine(photos);
            Console.ReadLine();
        }
    }
}