FileFlowsPlugins/ComicNodes/Helpers/GenericExtractor.cs

using SharpCompress.Archives;
using System;
using System.IO.Compression;
using System.Text.RegularExpressions;

namespace FileFlows.ComicNodes.Helpers;

internal class GenericExtractor
{
    /// <summary>
    /// Uncompresses a folder
    /// </summary>
    /// <param name="args">the node paratemers</param>
    /// <param name="workingFile">the file to extract</param>
    /// <param name="destinationPath">the location to extract to</param>
    /// <param name="halfProgress">if the NodeParameter.PartPercentageUpdate should end at 50%</param>
    internal static void Extract(NodeParameters args, string workingFile, string destinationPath, bool halfProgress = true)
    {
        if (args?.PartPercentageUpdate != null)
            args?.PartPercentageUpdate(halfProgress ? 50 : 0);

        bool isRar = workingFile.ToLowerInvariant().EndsWith(".cbr");
        try
        {

            ArchiveFactory.WriteToDirectory(workingFile, destinationPath);
            PageNameHelper.FixPageNames(destinationPath);
        }
        catch (Exception ex) when (isRar && ex.Message.Contains("Unknown Rar Header"))
        {
            UnrarCommandLine.Extract(args, workingFile, destinationPath, halfProgress: halfProgress);
        }

        if (args?.PartPercentageUpdate != null)
            args?.PartPercentageUpdate(halfProgress ? 50 : 100);
    }

    internal static int GetImageCount(NodeParameters args, string workingFile)
    {
        bool isRar = workingFile.ToLowerInvariant().EndsWith(".cbr");
        try
        {
            var rgxImages = new Regex(@"\.(jpeg|jpg|jpe|png|bmp|tiff|webp|gif)$", RegexOptions.IgnoreCase);
            using var archive = ArchiveFactory.Open(workingFile);
            var files = archive.Entries.Where(entry => !entry.IsDirectory).ToArray();
            return files.Where(x => rgxImages.IsMatch(x.Key)).Count();
        }
        catch(Exception ex) when (isRar && ex.Message.Contains("Unknown Rar Header"))
        {
            return UnrarCommandLine.GetImageCount(args, workingFile); 
        }
    }
}