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Attachments tool
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Jakub Melka
208
PdfTool/pdftoolattachments.cpp
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208
PdfTool/pdftoolattachments.cpp
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// Copyright (C) 2020 Jakub Melka
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//
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// This file is part of PdfForQt.
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//
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// PdfForQt is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// PdfForQt is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with PDFForQt. If not, see <https://www.gnu.org/licenses/>.
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#include "pdftoolattachments.h"
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#include "pdfexception.h"
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namespace pdftool
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{
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static PDFToolAttachmentsApplication s_attachmentsApplication;
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QString PDFToolAttachmentsApplication::getStandardString(StandardString standardString) const
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{
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switch (standardString)
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{
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case Command:
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return "attachments";
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case Name:
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return PDFToolTranslationContext::tr("Attachments");
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case Description:
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return PDFToolTranslationContext::tr("Show list or save attached files.");
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default:
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Q_ASSERT(false);
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break;
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}
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return QString();
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}
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int PDFToolAttachmentsApplication::execute(const PDFToolOptions& options)
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{
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pdf::PDFDocument document;
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if (!readDocument(options, document))
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{
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return ErrorDocumentReading;
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}
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struct FileInfo
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{
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QString no;
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QString fileName;
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QString mimeType;
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QString mimeTypeDescription;
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QString description;
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bool isSaved = false;
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int packedSize = 0;
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const pdf::PDFFileSpecification* specification = nullptr;
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};
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QMimeDatabase mimeDatabase;
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size_t savedFileCount = 0;
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size_t no = 1;
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std::vector<FileInfo> embeddedFiles;
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for (const auto& item : document.getCatalog()->getEmbeddedFiles())
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{
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const pdf::PDFFileSpecification* file = &item.second;
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const pdf::PDFEmbeddedFile* platformFile = file->getPlatformFile();
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if (!file->getPlatformFile() || !platformFile->isValid())
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{
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// Ignore invalid files
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continue;
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}
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FileInfo fileInfo;
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fileInfo.no = QString::number(no++);
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fileInfo.fileName = file->getPlatformFileName();
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fileInfo.description = file->getDescription();
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fileInfo.isSaved = false;
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fileInfo.specification = file;
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QMimeType type = mimeDatabase.mimeTypeForName(platformFile->getSubtype());
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if (!type.isValid())
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{
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type = mimeDatabase.mimeTypeForFile(fileInfo.fileName, QMimeDatabase::MatchExtension);
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}
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fileInfo.mimeType = type.name();
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fileInfo.mimeTypeDescription = type.comment();
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fileInfo.packedSize = platformFile->getStream()->getContent()->length();
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if (options.attachmentsSaveAll ||
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(!options.attachmentsSaveNumber.isEmpty() && fileInfo.no == options.attachmentsSaveNumber) ||
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(!options.attachmentsSaveFileName.isEmpty() && fileInfo.fileName == options.attachmentsSaveFileName))
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{
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fileInfo.isSaved = true;
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savedFileCount++;
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}
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embeddedFiles.push_back(qMove(fileInfo));
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}
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if (savedFileCount == 0)
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{
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// Just print a list of embedded files
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PDFOutputFormatter formatter(options.outputStyle, options.outputCodec);
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formatter.beginDocument("attachments", PDFToolTranslationContext::tr("Attached files of document %1").arg(options.document));
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formatter.endl();
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formatter.beginTable("overview", PDFToolTranslationContext::tr("Attached files overview"));
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formatter.beginTableHeaderRow("header");
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formatter.writeTableHeaderColumn("no", PDFToolTranslationContext::tr("No."), Qt::AlignLeft);
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formatter.writeTableHeaderColumn("file-name", PDFToolTranslationContext::tr("File name"), Qt::AlignLeft);
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formatter.writeTableHeaderColumn("mime-type", PDFToolTranslationContext::tr("Mime type"), Qt::AlignLeft);
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formatter.writeTableHeaderColumn("mime-type-description", PDFToolTranslationContext::tr("Mime type description"), Qt::AlignLeft);
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formatter.writeTableHeaderColumn("description", PDFToolTranslationContext::tr("File description"), Qt::AlignLeft);
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formatter.writeTableHeaderColumn("packed-size", PDFToolTranslationContext::tr("Packed size [bytes]"), Qt::AlignRight);
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formatter.endTableHeaderRow();
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int ref = 1;
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for (const FileInfo& info : embeddedFiles)
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{
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formatter.beginTableRow("file", ref);
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formatter.writeTableColumn("no", QString::number(ref));
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formatter.writeTableColumn("file-name", info.fileName);
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formatter.writeTableColumn("mime-type", info.mimeType);
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formatter.writeTableColumn("mime-type-description", info.mimeTypeDescription);
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formatter.writeTableColumn("description", info.description);
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formatter.writeTableColumn("packed-size", QString::number(info.packedSize));
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formatter.endTableRow();
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++ref;
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}
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formatter.endTable();
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formatter.endDocument();
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PDFConsole::writeText(formatter.getString(), options.outputCodec);
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}
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else
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{
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if (savedFileCount > 1 && !options.attachmentsTargetFile.isEmpty())
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{
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PDFConsole::writeError(PDFToolTranslationContext::tr("Target file name must not be specified, if multiple files are being saved."), options.outputCodec);
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return ErrorInvalidArguments;
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}
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for (const FileInfo& info : embeddedFiles)
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{
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if (!info.isSaved)
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{
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// This file is not marked to be saved
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continue;
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}
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QString outputFile = info.fileName;
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if (!options.attachmentsTargetFile.isEmpty())
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{
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outputFile = options.attachmentsTargetFile;
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}
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if (!options.attachmentsOutputDirectory.isEmpty())
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{
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outputFile = QString("%1/%2").arg(options.attachmentsOutputDirectory, outputFile);
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}
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try
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{
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QByteArray data = document.getDecodedStream(info.specification->getPlatformFile()->getStream());
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QFile file(outputFile);
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if (file.open(QFile::WriteOnly | QFile::Truncate))
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{
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file.write(data);
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file.close();
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}
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else
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{
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PDFConsole::writeError(PDFToolTranslationContext::tr("Failed to save attachment to file. %1").arg(file.errorString()), options.outputCodec);
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return ErrorFailedWriteToFile;
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}
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}
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catch (pdf::PDFException e)
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{
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PDFConsole::writeError(PDFToolTranslationContext::tr("Failed to save attachment to file. %1").arg(e.getMessage()), options.outputCodec);
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return ErrorFailedWriteToFile;
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}
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}
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}
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return ExitSuccess;
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}
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PDFToolAbstractApplication::Options PDFToolAttachmentsApplication::getOptionsFlags() const
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{
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return OpenDocument | Attachments;
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}
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} // namespace pdftool
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