/// <summary>
/// Returns all themes that have been imported earlier from GitHub repository.
/// </summary>
/// <param name="ensureOnlyFiles">A list of theme file names (without directory information) to treat as white-list - all other files will be deleted.</param>
/// <returns>Themes.</returns>
private GitHubThemeResult GetImportedThemesInternal(IEnumerable <string> ensureOnlyFiles = null)
{
GitHubThemeResult ret = null;
GitHubInMemoryTheme inMemoryTheme = null;
inMemoryTheme = GetUrlSpecifiedTheme();
if (inMemoryTheme != null)
{
ret = new GitHubThemeResult()
{
Themes = new List <GitHubTheme>()
{
new GitHubTheme()
{
Id = inMemoryTheme.Id,
Name = inMemoryTheme.Name
}
},
Checksum = CalculateChecksum(inMemoryTheme)
};
}
else
{
ret = ThemeSource.GetImportedThemes <GitHubTheme, GitHubThemeResult>("~/Assets/css/Themes/", ensureOnlyFiles);
}
return(ret);
}
/// <summary>
/// Returns the theme which is specified via URL.
/// </summary>
/// <returns>Theme.</returns>
private GitHubInMemoryTheme GetUrlSpecifiedTheme()
{
GitHubInMemoryTheme ret = null;
string inMemoryThemeUrl = ThemeSource.GetThemeUrlFromRequest(HttpContext.Current.Request);
if (!string.IsNullOrEmpty(inMemoryThemeUrl))
{
ret = GitHubInMemoryThemeCache.Read();
if (ret == null || string.Compare(inMemoryThemeUrl, ret.Uri, true) != 0)
{
ret = ThemeSource.CreateThemeInstance <GitHubInMemoryTheme>(inMemoryThemeUrl, t =>
{
t.Uri = inMemoryThemeUrl;
t.Content = Encoding.UTF8.GetBytes(ThemeSource.DownloadString(inMemoryThemeUrl));
});
if (ret.Content != null && ret.Content.Length > 0)
{
GitHubInMemoryThemeCache.Update(ret);
}
else
{
ret = null;
}
}
}
return(ret);
}
/// <summary>
/// Returns the bundle stream for given themes.
/// </summary>
/// <param name="themes">Themes.</param>
/// <returns>Bundle stream.</returns>
public Stream GetBundleStream(GitHubThemeResult themes = null)
{
Stream ret = null;
GitHubInMemoryTheme inMemoryTheme = null;
if (themes == null)
{
inMemoryTheme = GetUrlSpecifiedTheme();
if (inMemoryTheme != null)
{
ret = new MemoryStream(inMemoryTheme.Content);
}
}
if (ret == null)
{
if (themes == null)
{
themes = ImportThemes();
}
ret = ThemeSource.GetBundleStream <GitHubTheme, GitHubThemeResult>("~/Assets/css/Themes/", themes);
}
return(ret);
}
/// <summary>
/// Reads from cache.
/// </summary>
/// <returns>Result.</returns>
public static GitHubInMemoryTheme Read()
{
GitHubInMemoryTheme ret = null;
if (_result != null && DateTime.UtcNow.Subtract(_result.Item2).TotalMinutes < 1)
{
lock (_lock)
{
if (_result != null)
{
ret = _result.Item1;
}
}
}
return(ret);
}
/// <summary>
/// Updates the cache.
/// </summary>
/// <param name="result">Result.</param>
public static void Update(GitHubInMemoryTheme result)
{
_result = new Tuple <GitHubInMemoryTheme, DateTime>(result, DateTime.UtcNow);
}
/// <summary>
/// Calculates the checksum for given theme.
/// </summary>
/// <param name="theme">Theme.</param>
/// <returns>Checksum.</returns>
private string CalculateChecksum(GitHubInMemoryTheme theme)
{
return(Utils.Crypto.GetHash(theme.Uri));
}