TekH
a6694bfce7
Introduced endpoints for embedding attachments in PDFs and converting between standard PDFs and PDF/A formats. Added `PdfAttachmentController` and `PdfConversionController` with multipart/form-data and Base64-based support. Implemented commands, handlers, and validators for these operations. Extended `IPdfProcessor` with methods for adding attachments and PDF/A conversion. Partially implemented functionality in `DevExpressPdfProcessor`, including `ConvertFromPdfAAsync`. Added `attachment.xml` and `withoutAttachment.pdf` as resources for testing. Marked endpoints as `[Obsolete]` to indicate incomplete implementation. Improved validation and error handling for commands.
91 lines
2.7 KiB
C#
91 lines
2.7 KiB
C#
using DocumentOperator.Application.Common.Interfaces;
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using FluentValidation;
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using MediatR;
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namespace DocumentOperator.Application.AddAttachments;
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/// <summary>
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/// Command to add one or more attachments to a PDF document (supports PDF/A-3)
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/// </summary>
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public record AddAttachmentsCommand : IRequest<byte[]>
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{
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/// <summary>
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/// PDF document stream. Must be positioned at the beginning (Position = 0).
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/// </summary>
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public required Stream PdfStream { get; init; }
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/// <summary>
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/// List of attachments to embed (filename, content, optional MIME type)
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/// </summary>
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public required IReadOnlyList<AttachmentFile> Attachments { get; init; }
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}
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/// <summary>
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/// Represents a file to be attached to a PDF
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/// </summary>
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public record AttachmentFile
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{
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/// <summary>
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/// File name (e.g., "invoice.xml", "document.pdf")
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/// </summary>
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public required string FileName { get; init; }
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/// <summary>
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/// File content as byte array
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/// </summary>
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public required byte[] Content { get; init; }
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/// <summary>
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/// MIME type (optional, e.g., "application/xml", "application/pdf")
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/// If not provided, will be inferred from file extension
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/// </summary>
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public string? MimeType { get; init; }
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}
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/// <summary>
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/// Handler for AddAttachmentsCommand
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/// </summary>
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public class AddAttachmentsCommandHandler(IPdfProcessor pdfProcessor)
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: IRequestHandler<AddAttachmentsCommand, byte[]>
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{
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public async Task<byte[]> Handle(AddAttachmentsCommand request, CancellationToken cancellationToken)
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{
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// Convert to tuple list for IPdfProcessor
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var attachmentTuples = request.Attachments
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.Select(a => (a.FileName, a.Content, a.MimeType))
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.ToList();
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return await pdfProcessor.AddAttachmentsAsync(request.PdfStream, attachmentTuples);
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}
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}
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/// <summary>
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/// Validator for AddAttachmentsCommand
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/// </summary>
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public class AddAttachmentsCommandValidator : AbstractValidator<AddAttachmentsCommand>
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{
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public AddAttachmentsCommandValidator()
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{
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RuleFor(x => x.PdfStream)
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.NotNull()
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.WithMessage("PDF stream is required");
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RuleFor(x => x.Attachments)
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.NotNull()
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.NotEmpty()
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.WithMessage("At least one attachment is required");
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RuleForEach(x => x.Attachments).ChildRules(attachment =>
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{
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attachment.RuleFor(a => a.FileName)
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.NotEmpty()
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.WithMessage("Attachment file name is required");
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attachment.RuleFor(a => a.Content)
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.NotNull()
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.NotEmpty()
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.WithMessage("Attachment content is required");
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});
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}
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}
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