public FileService(EmojiContext context, EventService events, EmojiPadConfiguration config)
{
_context = context;
_event = events;
_config = config;
context.Database.Migrate();
if (!Directory.Exists(_config.EmojiFolderPath))
{
Directory.CreateDirectory(_config.EmojiFolderPath);
}
Task.Run(() =>
{
while (Program.Running)
{
Thread.Sleep(1000);
try
{
if (SyncEmojiCache())
{
_event.SetBusy();
context.SaveChanges();
Thread.Sleep(1000);
_event.InvokeRefreshEmojis();
}
}
catch
{
// ignored
}
}
});
}
private bool SyncEmojiCache()
{
bool changed = false;
lock (_context)
{
var dir = new DirectoryInfo(_config.EmojiFolderPath);
var files = new HashSet <string>();
foreach (var enumerateFile in dir.EnumerateFiles())
{
if (IsValidImage(enumerateFile))
{
files.Add(enumerateFile.Name);
}
}
// Remove deleted files
var deletedEmojis = new List <Emoji>();
foreach (var k in _context.Emojis)
{
if (!files.Contains(k.FileName))
{
changed = true;
deletedEmojis.Add(k);
Console.WriteLine($"Deleting Emoji {k.FileName} from index, the file was removed from disk!");
}
else
{
files.Remove(k.FileName);
}
}
_context.RemoveRange(deletedEmojis);
foreach (var file in files)
{
changed = true;
Console.WriteLine($"Adding Emoji {file} to index, the file was created!");
_context.Add(new Emoji()
{
FileName = file,
UsedFrequency = 0
});
}
_context.SaveChanges();
}
return(changed);
}