/// <summary>
/// Attaches files to a PDF file.
/// </summary>
/// <param name="pdftk">The IPDFtk object.</param>
/// <param name="pdfFile">A stream of the PDF file input.</param>
/// <param name="attachments">Streams of files to attach to the PDF.</param>
/// <param name="page">The page to attach the given files, if null then files are attached to the document level.</param>
/// <returns>A result with the files attached to the PDF.</returns>
public static async Task <IPDFtkResult <byte[]> > AttachFiles(this IPDFtk pdftk, Stream pdfFile, IEnumerable <KeyValuePair <string, Stream> > attachments, int?page = null)
{
using var inputFile = await TempPDFtkFile.FromAsync(pdfFile);
using var attachmentFiles = await TempPDFtkFiles.FromAsync(attachments);
return(await pdftk.AttachFiles(inputFile.TempFileName, attachmentFiles.FileNames, page));
}
public static async Task <TempPDFtkFiles> FromAsync(IEnumerable <KeyValuePair <string, byte[]> > attachments)
{
var tempPdFtkFiles = new TempPDFtkFiles();
foreach (var kvp in attachments)
{
var fileName = kvp.Key;
var content = kvp.Value;
#if NETSTANDARD2_0
File.WriteAllBytes(Path.Combine(tempPdFtkFiles._directory.TempDirectoryFullName, fileName),
content);
await Task.CompletedTask;
#else
await File.WriteAllBytesAsync(Path.Combine(tempPdFtkFiles._directory.TempDirectoryFullName, fileName),
content);
#endif
}
return(tempPdFtkFiles);
}
public static async Task <TempPDFtkFiles> FromAsync(IEnumerable <KeyValuePair <string, Stream> > attachments)
{
var tempPdFtkFiles = new TempPDFtkFiles();
foreach (var kvp in attachments)
{
var fileName = kvp.Key;
var stream = kvp.Value;
#if NETSTANDARD2_0
using var openWrite =
File.OpenWrite(Path.Combine(tempPdFtkFiles._directory.TempDirectoryFullName, fileName));
#else
await using var openWrite =
File.OpenWrite(Path.Combine(tempPdFtkFiles._directory.TempDirectoryFullName, fileName));
#endif
await stream.CopyToAsync(openWrite);
}
return(tempPdFtkFiles);
}
