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@ChadMcCallum
Created July 22, 2014 14:02
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Data layer class for 10 Ways to Build Web Services in .NET
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Runtime.Serialization.Formatters.Binary;
namespace Data
{
public class PunDataService
{
private List<Pun> Puns { get; set; }
public PunDataService()
{
if (File.Exists("./puns.dat"))
{
var formatter = new BinaryFormatter();
using (var stream = new FileStream("./puns.dat", FileMode.Open, FileAccess.Read, FileShare.Read))
{
this.Puns = (List<Pun>)formatter.Deserialize(stream);
}
}
else
{
this.Puns = new List<Pun>();
SeedPuns();
}
}
private void Save()
{
var formatter = new BinaryFormatter();
using (var stream = new FileStream("./puns.dat", FileMode.Create, FileAccess.Write))
{
formatter.Serialize(stream, this.Puns);
}
}
private void SeedPuns()
{
var pun = new Pun
{
PunID = 1,
Title = "Lazy Bike",
Joke = "Why can't a bike stand up on its own? It's two tired!"
};
this.Puns.Add(pun);
pun = new Pun
{
PunID = 2,
Title = "Cheap Batteries",
Joke = "How much for the dead batteries? Nothing - they're free of charge!"
};
this.Puns.Add(pun);
Save();
}
public Pun[] GetPuns()
{
return this.Puns.ToArray();
}
public Pun GetPunById(int id)
{
return this.Puns.SingleOrDefault(p => p.PunID == id);
}
public void UpdatePun(Pun pun)
{
var found = this.Puns.SingleOrDefault(p => p.PunID == pun.PunID);
if (found != null)
{
this.Puns.Remove(found);
this.Puns.Add(pun);
Save();
}
}
public void AddPun(Pun pun)
{
var lastID = this.Puns.Max(p => p.PunID);
pun.PunID = lastID + 1;
this.Puns.Add(pun);
Save();
}
public void DeletePun(int id)
{
var pun = this.Puns.SingleOrDefault(p => p.PunID == id);
this.Puns.Remove(pun);
Save();
}
}
}
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