icarus/Controllers/Utilities/SongCompression.cs

using System;
using System.IO;
using System.Threading.Tasks;

using Ionic.Zip;
using Microsoft.AspNetCore.Http;

using Icarus.Models;

namespace Icarus.Controllers.Utilities;

public class SongCompression
{
    #region Fields
    string _compressedSongFilename;
    string _tempDirectory;
    byte[] _uncompressedSong;
    #endregion


    #region Propterties
    public string CompressedSongFilename
    {
        get => _compressedSongFilename;
        set => _compressedSongFilename = value;
    }
    #endregion


    #region Constructors
    public SongCompression()
    {
    }
    public SongCompression(string tempDirectory)
    {
        _tempDirectory = tempDirectory;
    }
    public SongCompression(byte[] uncompressedSong)
    {
        _uncompressedSong = uncompressedSong;
    }
    #endregion


    #region Methods
    public async Task<SongData> RetrieveCompressedSong(Song song)
    {
        SongData songData = new SongData();
        try
        {
            var archivePath = RetrieveCompressesSongPath(song);
            Console.WriteLine($"Compressed song saved to: {archivePath}");
            
            songData.Data = await System.IO.File.ReadAllBytesAsync(archivePath);
        }
        catch(Exception ex)
        {
            var exMsg = ex.Message;
            Console.WriteLine($"An error ocurred: \n{exMsg}");
        }

        return songData;
    }

    public string RetrieveCompressesSongPath(Song songDetails)
    {
        string tmpZipFilePath = _tempDirectory + songDetails.Filename;

        try
        {
            using (ZipFile zip = new ZipFile())
            {
                zip.AddFile(songDetails.SongPath());
                zip.Save(tmpZipFilePath);
            }

            Console.WriteLine("Successfully compressed");
        }
        catch (Exception ex)
        {
            var exMsg = ex.Message;
            Console.WriteLine("An error ocurred");
            Console.WriteLine(exMsg);
        }

        if (songDetails.Filename.Contains(Constants.FileExtensions.WAV_EXTENSION))
        {
            _compressedSongFilename = StripMP3Extension(songDetails.Filename);
        }

        return tmpZipFilePath;
    }

    // Method not being used
    public byte[] CompressedSong(byte[] uncompressedSong)
    {
        byte[] compressedSong = null;
        try
        {
            Console.WriteLine("Song has been successfully compressed");
        }
        catch (Exception ex)
        {
            var exMsg = ex.Message;
            Console.WriteLine("An error ocurred:");
            Console.WriteLine(exMsg);
        }

        return compressedSong;
    }


    string StripMP3Extension(string filename)
    {
        Console.WriteLine($"Before: {filename}");
        int filenameLength = filename.Length;
        Console.WriteLine($"Filename length {filenameLength}");
        var endIndex = filenameLength - 1;
        var startIndex = endIndex - 3;
        Console.WriteLine($"Starting index {startIndex} and ending index {endIndex}");
        var stripped = filename.Remove(startIndex, 4);
        stripped += ".zip";
        Console.WriteLine($"After {stripped}");

        return stripped;
    }
    #endregion
}