using System.IO;
using System.Runtime.Serialization.Formatters.Binary;
using System.Web;

namespace iiie.CacheControl.Business.OutputCache
{
    public class FileOuputCache : IOutputCache
    {
        public string TempPath { get; set; }

        public string GetPath(string key)
        {
            key = HttpUtility.UrlEncode(key);
            return Path.Combine(TempPath, key);
        }

        public override object Get(string key)
        {
            key = GetPath(key);
            var formatter = new BinaryFormatter();
            var stream = new FileStream(key, FileMode.Open);
            var obj = formatter.Deserialize(stream);
            stream.Close();
            return obj;
        }

        public override void Remove(string key)
        {
            key = GetPath(key);
            File.Delete(key);
        }

        public override bool Contains(string key)
        {
            key = GetPath(key);
            return File.Exists(key);
        }

        public override void Add(string key, object o)
        {
            key = GetPath(key);
            var formatter = new BinaryFormatter();
            var stream = new FileStream(key, FileMode.Open);
            formatter.Serialize(stream, o);
            stream.Close();
        }
    }
}