/// <summary>
/// Asynchronously gets the character image from cache.
/// </summary>
/// <param name="filename">The filename.</param>
/// <param name="directory">The directory.</param>
/// <returns></returns>
internal static Image GetImageFromCache(string filename, string directory = null)
{
// First check whether the image exists in cache
EveMonClient.EnsureCacheDirInit();
string cacheFileName = Path.Combine(directory ?? EveMonClient.EVEMonImageCacheDir,
filename);
if (!File.Exists(cacheFileName))
{
return(null);
}
try
{
// Load the data into a MemoryStream before returning the image to avoid file
// locking
Image image;
byte[] imageBytes = File.ReadAllBytes(cacheFileName);
using (MemoryStream stream = new MemoryStream(imageBytes))
{
image = Image.FromStream(stream);
}
return(image);
}
catch (ArgumentException e)
{
ExceptionHandler.LogException(e, false);
FileHelper.DeleteFile(cacheFileName);
}
catch (IOException e)
{
ExceptionHandler.LogException(e, false);
}
catch (UnauthorizedAccessException e)
{
ExceptionHandler.LogException(e, false);
}
return(null);
}
/// <summary>
/// Adds the image to the cache.
/// </summary>
/// <param name="image">The image.</param>
/// <param name="filename">The filename.</param>
/// <param name="directory">The directory.</param>
/// <returns></returns>
internal static async Task AddImageToCacheAsync(Image image, string filename, string directory = null)
{
// Saves the image file
try
{
// Write this image to the cache file
EveMonClient.EnsureCacheDirInit();
string cacheFileName = Path.Combine(directory ?? EveMonClient.EVEMonImageCacheDir, filename);
await FileHelper.OverwriteOrWarnTheUserAsync(cacheFileName,
async fs =>
{
((Image)image.Clone()).Save(fs, ImageFormat.Png);
await fs.FlushAsync();
return(true);
}).ConfigureAwait(false);
}
catch (Exception ex)
{
ExceptionHandler.LogRethrowException(ex);
throw;
}
}