forked from ddrilling/AsbCloudServer
79 lines
3.3 KiB
C#
79 lines
3.3 KiB
C#
using iTextSharp.text;
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using iTextSharp.text.pdf;
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using System.Collections.Generic;
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using System.IO;
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using System.Linq;
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using CliWrap;
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using System.Threading.Tasks;
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using System.Threading;
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namespace AsbCloudInfrastructure.Services.DrillingProgram.Convert
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{
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#nullable enable
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sealed internal class ConvertToPdf
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{
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private static readonly string[] filesExtensions = { ".xlsx", ".xls", ".ods", ".odt", ".doc", ".docx", ".pdf" };
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private static void MergeFiles(IEnumerable<string> inputFiles, string outFile)
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{
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using var stream = new FileStream(outFile, FileMode.Create);
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using var doc = new Document();
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using var pdf = new PdfCopy(doc, stream);
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doc.Open();
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var inputFilesList = inputFiles.ToList();
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foreach (var file in inputFilesList)
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{
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var reader = new PdfReader(file);
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for (int i = 0; i < reader.NumberOfPages; i++)
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{
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pdf.AddPage(pdf.GetImportedPage(reader, i + 1));
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}
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pdf.FreeReader(reader);
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reader.Close();
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};
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}
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private static async Task StartConvertProcessAsync(string inputFileName, string outFileName, CancellationToken token)
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{
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//var result = Cli.Wrap("/usr/bin/soffice")
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// .WithArguments($"--headless --convert-to pdf {inputFileName} --outdir {outFileName}");
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var result = Cli.Wrap("C:\\Program Files\\LibreOffice\\program\\soffice.exe")
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.WithArguments($"-headless -convert-to pdf {inputFileName} --outdir {outFileName}");
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await result.ExecuteAsync(token);
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}
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public static async Task GetConverteAndMergedFileAsync(IEnumerable<string> filesNames, string resultPath, CancellationToken token)
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{
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var badFiles = filesNames.Where(f => !filesExtensions.Contains(Path.GetExtension(f)));
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if (badFiles.Any())
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{
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throw new FileFormatException($"Файлы: {string.Join(", ", badFiles)} - неподдерживаемого формата. " +
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$"Они не могут быть добавлены в список файлов для конвертации и слияния в общий файл программы бурения.");
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}
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var listFileNames = filesNames
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.Distinct()
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.Select(f => new {
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inputFile = f,
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convertedFile = Path.ChangeExtension(f, ".pdf")
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})
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.ToList();
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var listFilesToDelete = new List<string>();
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foreach (var fileName in listFileNames)
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{
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var fileExt = Path.GetExtension(fileName.inputFile);
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if (fileExt != ".pdf")
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{
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await StartConvertProcessAsync(fileName.inputFile, fileName.convertedFile, token);
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listFilesToDelete.Add(fileName.convertedFile);
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}
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}
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MergeFiles(listFileNames.Select(c => c.convertedFile), resultPath);
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foreach (var file in listFilesToDelete)
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{
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File.Delete(file);
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}
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}
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}
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#nullable disable
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}
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