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using System;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using MediaBrowser.Model.IO;
using MediaBrowser.Common.Configuration;
using MediaBrowser.Common.Net;
using MediaBrowser.Controller.IO;
using MediaBrowser.Model.IO;
using MediaBrowser.Model.Logging;
using MediaBrowser.Model.Net;
namespace MediaBrowser.MediaEncoding.Encoder
{
public class FontConfigLoader
{
private readonly IHttpClient _httpClient;
private readonly IApplicationPaths _appPaths;
private readonly ILogger _logger;
private readonly IZipClient _zipClient;
private readonly IFileSystem _fileSystem;
private readonly string[] _fontUrls =
{
"https://github.com/MediaBrowser/MediaBrowser.Resources/raw/master/ffmpeg/ARIALUNI.7z"
};
public FontConfigLoader(IHttpClient httpClient, IApplicationPaths appPaths, ILogger logger, IZipClient zipClient, IFileSystem fileSystem)
{
_httpClient = httpClient;
_appPaths = appPaths;
_logger = logger;
_zipClient = zipClient;
_fileSystem = fileSystem;
}
/// <summary>
/// Extracts the fonts.
/// </summary>
/// <param name="targetPath">The target path.</param>
/// <returns>Task.</returns>
public async Task DownloadFonts(string targetPath)
{
try
{
var fontsDirectory = Path.Combine(targetPath, "fonts");
_fileSystem.CreateDirectory(fontsDirectory);
const string fontFilename = "ARIALUNI.TTF";
var fontFile = Path.Combine(fontsDirectory, fontFilename);
if (_fileSystem.FileExists(fontFile))
{
await WriteFontConfigFile(fontsDirectory).ConfigureAwait(false);
}
else
{
// Kick this off, but no need to wait on it
var task = Task.Run(async () =>
{
await DownloadFontFile(fontsDirectory, fontFilename, new Progress<double>()).ConfigureAwait(false);
await WriteFontConfigFile(fontsDirectory).ConfigureAwait(false);
});
}
}
catch (HttpException ex)
{
// Don't let the server crash because of this
_logger.ErrorException("Error downloading ffmpeg font files", ex);
}
catch (Exception ex)
{
// Don't let the server crash because of this
_logger.ErrorException("Error writing ffmpeg font files", ex);
}
}
/// <summary>
/// Downloads the font file.
/// </summary>
/// <param name="fontsDirectory">The fonts directory.</param>
/// <param name="fontFilename">The font filename.</param>
/// <returns>Task.</returns>
private async Task DownloadFontFile(string fontsDirectory, string fontFilename, IProgress<double> progress)
{
var existingFile = _fileSystem
.GetFilePaths(_appPaths.ProgramDataPath, true)
.FirstOrDefault(i => string.Equals(fontFilename, Path.GetFileName(i), StringComparison.OrdinalIgnoreCase));
if (existingFile != null)
{
try
{
_fileSystem.CopyFile(existingFile, Path.Combine(fontsDirectory, fontFilename), true);
return;
}
catch (IOException ex)
{
// Log this, but don't let it fail the operation
_logger.ErrorException("Error copying file", ex);
}
}
string tempFile = null;
foreach (var url in _fontUrls)
{
progress.Report(0);
try
{
tempFile = await _httpClient.GetTempFile(new HttpRequestOptions
{
Url = url,
Progress = progress
}).ConfigureAwait(false);
break;
}
catch (Exception ex)
{
// The core can function without the font file, so handle this
_logger.ErrorException("Failed to download ffmpeg font file from {0}", ex, url);
}
}
if (string.IsNullOrEmpty(tempFile))
{
return;
}
Extract7zArchive(tempFile, fontsDirectory);
try
{
_fileSystem.DeleteFile(tempFile);
}
catch (IOException ex)
{
// Log this, but don't let it fail the operation
_logger.ErrorException("Error deleting temp file {0}", ex, tempFile);
}
}
private void Extract7zArchive(string archivePath, string targetPath)
{
_logger.Info("Extracting {0} to {1}", archivePath, targetPath);
_zipClient.ExtractAllFrom7z(archivePath, targetPath, true);
}
/// <summary>
/// Writes the font config file.
/// </summary>
/// <param name="fontsDirectory">The fonts directory.</param>
/// <returns>Task.</returns>
private async Task WriteFontConfigFile(string fontsDirectory)
{
const string fontConfigFilename = "fonts.conf";
var fontConfigFile = Path.Combine(fontsDirectory, fontConfigFilename);
if (!_fileSystem.FileExists(fontConfigFile))
{
var contents = string.Format("<?xml version=\"1.0\"?><fontconfig><dir>{0}</dir><alias><family>Arial</family><prefer>Arial Unicode MS</prefer></alias></fontconfig>", fontsDirectory);
var bytes = Encoding.UTF8.GetBytes(contents);
using (var fileStream = _fileSystem.GetFileStream(fontConfigFile, FileOpenMode.Create, FileAccessMode.Write,
FileShareMode.Read, true))
{
await fileStream.WriteAsync(bytes, 0, bytes.Length);
}
}
}
}
}
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