private string GetBundle(string[] inputFiles, string type)
{
var bundleFileProcessor = new BundleFileProcessor();
var bundle = new BundlerMinifier.Bundle();
//we wil store the file names with date of modification to keep track whether a new bundle should be generated or not
//any minor modification will cause regeneration of the bundle
//we do this because it is a performance intensive operation and the we should only do it when needed
var distinctFiles = inputFiles.Distinct().ToList();
var fileNamesWithDates = new List <string>();
foreach (var inputFile in distinctFiles)
{
//the input file can either be 1. theme-css 2. plugin-css 3. admin-css 4. common-css
//check them one by one
var file = ServerHelper.MapPath("~/Content/Themes" + inputFile);
if (!_localFileProvider.FileExists(file))
{
//plugins
file = ServerHelper.MapPath("~/" + inputFile);
if (!_localFileProvider.FileExists(file))
{
//administration & common
file = ServerHelper.MapPath("~/" + inputFile, true);
if (!_localFileProvider.FileExists(file))
{
continue; //can't do anything...the file doesn't exist
}
}
}
bundle.InputFiles.Add(file);
var modDate = _localFileProvider.GetLastModifiedDateTime(file);
fileNamesWithDates.Add($"{file}:{modDate}");
}
var outputFilePart1 = GetOutputFileName(fileNamesWithDates);
var outputFilePart2 = GetOutputFileName(distinctFiles);
var outputFile = outputFilePart1 + "_" + outputFilePart2;
var bundlesDirectory = ServerHelper.MapPath(ApplicationConfig.BundlesDirectory, true);
var bundleFileName = bundlesDirectory + "/" + outputFile + $".min.{type}";
bundle.OutputFileName = bundleFileName;
//do we need to generate the bundle?
if (!_localFileProvider.FileExists(bundleFileName))
{
//delete the existing bundles of these files
try
{
_localFileProvider.DeleteFiles(bundlesDirectory, $"*_{outputFilePart2}.min.{type}*");
}
catch
{
//do nothing...the file must be locked...will try next time
}
bundle.FileName = bundleFileName + ".json";
BundleMinifier.ErrorMinifyingFile += BundleMinifier_ErrorMinifyingFile;
bundleFileProcessor.Process(bundle.FileName, new List <BundlerMinifier.Bundle>()
{
bundle
});
}
//if operation succeeded, return the url, else null
if (bundle.OutputFileName == null)
{
return(null);
}
//also create a gzipped version as well
using (var bundleFileStream = File.OpenRead(bundleFileName))
using (var compressedFileStream = File.Create(bundleFileName + ".gz"))
{
using (var compressionStream = new GZipStream(compressedFileStream, CompressionMode.Compress))
{
bundleFileStream.CopyTo(compressionStream);
}
}
return(bundle.OutputFileName == null ? null : ApplicationEngine.MapUrl(bundleFileName));
}
