public static ChangeList ReadChanges(string url)
{
try
{
using (WebClient wc = new WebClient())
{
string jsonString = wc.DownloadString(url);
ChangeList changeList = JsonSerializer.Deserialize <ChangeList>(jsonString);
return(changeList);
};
}
catch (Exception ex)
{
throw new Exception(ex.Message);
}
}
public static Mixtape ReadAndApplyChanges(Mixtape currentMixtape, string changes)
{
Mixtape updatedMixtape = currentMixtape;
ChangeList changeList = ChangeList.ReadChanges(changes);
foreach (Change c in changeList.changes)
{
try
{
if (c.user is not null)
{
switch (c.change_action)
{
case ("update"):
updatedMixtape = UpdateUser(updatedMixtape, c.user);
break;
case ("add"):
updatedMixtape = AddUser(updatedMixtape, c.user);
break;
case ("delete"):
updatedMixtape = RemoveUser(updatedMixtape, c.user);
break;
default:
throw new NotSupportedException($"Unable to recognize {nameof(c.change_action)}: {c.change_action}\r\n"
+ $"Could not make changes to user id: {c.user.id}");
}
}
if (c.playlist is not null)
{
switch (c.change_action)
{
case ("update"):
updatedMixtape = UpdatePlaylist(updatedMixtape, c.playlist);
break;
case ("add"):
updatedMixtape = AddPlaylist(updatedMixtape, c.playlist);
break;
case ("delete"):
updatedMixtape = RemovePlaylist(updatedMixtape, c.playlist);
break;
default:
throw new NotSupportedException($"Unable to recognize {nameof(c.change_action)}: {c.change_action}\r\n"
+ $"Could not make changes to playlist id: {c.playlist.id}");
}
}
if (c.song is not null)
{
switch (c.change_action)
{
case ("update"):
updatedMixtape = UpdateSong(updatedMixtape, c.song);
break;
case ("add"):
updatedMixtape = AddSong(updatedMixtape, c.song);
break;
case ("delete"):
updatedMixtape = RemoveSong(updatedMixtape, c.song);
break;
default:
throw new NotSupportedException($"Unable to recognize {nameof(c.change_action)}: {c.change_action}\r\n"
+ $"Could not make changes to song id: {c.song.id}");
}
}
}
catch (NotSupportedException ex)
{
Console.WriteLine(ex.Message);
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
}
return(updatedMixtape);
}
