CloudMusic/FNZCM2/FNZCM2.ProofOfConcept/PocFileMetaReader.cs

using FNZCM2.Abstractions.Models.Metadata;
using System;
using System.Collections.Generic;
using System.IO.Enumeration;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using FNZCM2.Abstractions.Utility;

namespace FNZCM2.ProofOfConcept;

using FSE = (bool isDir, string path, long size, DateTimeOffset lastWrited);

internal class PocFileMetaReader
{
    public static void RunPoc()
    {
        //var r1 = FileMetaReader.Read(ChooseFile("library-ajc", ".flac"), 0, out var err1);
        //var r2 = FileMetaReader.Read(FirstFile("library-ajc", ".log"), 0, out var err2);
        //var r3 = FileMetaReader.Read(FirstFile("library-ajc", ".txt"), 0, out var err3);
        //var r4 = FileMetaReader.Read(FirstFile("library-ajc", ".jpg"), 0, out var err4);
        //var r5 = FileMetaReader.Read(FirstFile("library-ajc", ".iso"), 0, out var err5);
        //var r6 = FileMetaReader.Read(FirstFile("library-ajc", ".mp4"), 0, out var err6);
        //var r7 = FileMetaReader.Read(FirstFile("library-ajc", ".png"), 0, out var err7);

        //var r1 = FileMetaReader.Read(FirstFile("library-ads", ".flac"), 0, out var err1);
        //var r7 = FileMetaReader.Read(FirstFile("library-ads", ".png"), 0, out var err7);
        //var r8 = FileMetaReader.Read(FirstFile("library-ads", ".mp3"), 0, out var err8);
        //var r4 = FileMetaReader.Read(FirstFile("library-ads", ".jpg"), 0, out var err4);
        //var r9 = FileMetaReader.Read(FirstFile("library-ads", ".tiff"), 0, out var err9);
        //var rA = FileMetaReader.Read(FirstFile("library-ads", ".pdf"), 0, out var errA);
        //var r2 = FileMetaReader.Read(FirstFile("library-ads", ".log"), 0, out var err2);
        //var r3 = FileMetaReader.Read(FirstFile("library-ads", ".m3u8"), 0, out var err3);
        //var r5 = FileMetaReader.Read(FirstFile("library-ads", ".gif"), 0, out var err5);
        //var r6 = FileMetaReader.Read(FirstFile("library-ads", ".accurip"), 0, out var err6);

        //var r1 = FileMetaReader.Read(FirstFile("library-afs", ".flac"), 0, out var err1);
        //var r5 = FileMetaReader.Read(FirstFile("library-afs", ".iso"), 0, out var err5);
        //var r7 = FileMetaReader.Read(FirstFile("library-afs", ".png"), 0, out var err7);
        //var r4 = FileMetaReader.Read(FirstFile("library-afs", ".jpg"), 0, out var err4);
        //var r8 = FileMetaReader.Read(FirstFile("library-afs", ".mdf"), 0, out var err8);
        //var r9 = FileMetaReader.Read(FirstFile("library-afs", ".mpg"), 0, out var err9);
        //var rA = FileMetaReader.Read(FirstFile("library-afs", ".bin"), 0, out var errA);
        //var rB = FileMetaReader.Read(FirstFile("library-afs", ".mp3"), 0, out var errB);
        //var r6 = FileMetaReader.Read(FirstFile("library-afs", ".fpl"), 0, out var err6);
        //var r2 = FileMetaReader.Read(FirstFile("library-afs", ".log"), 0, out var err2);
        //var r3 = FileMetaReader.Read(FirstFile("library-afs", ".mds"), 0, out var err3);


        foreach (var enumFile in EnumFiles("library-ads", ".flac", 3000, 0))
        {
            var rf = FileMetaReader.Read(enumFile, 0, out var errF);
            if (rf == null)
            {
                var bpF = 0;
            }
        }

        int bp = 0;
    }

    private static string ChooseFile(string folder, string endsWith, int skip = 0)
    {
        var fse = new FileSystemEnumerable<FSE>(
            folder,
            (ref FileSystemEntry p) => new(
                p.IsDirectory,
                p.ToFullPath(),
                p.Length,
                p.LastWriteTimeUtc
            ),
            new()
            {
                RecurseSubdirectories = true,
            })
        {
            ShouldIncludePredicate = (ref FileSystemEntry p) => p.ToFullPath().EndsWith(endsWith, true, null)
        };

        var file = fse.Skip(skip).First();
        return file.path;
    }

    private static IEnumerable<string> EnumFiles(string folder, string endsWith, int take = 1, int skip = 0)
    {
        var fse = new FileSystemEnumerable<FSE>(
            folder,
            (ref FileSystemEntry p) => new(
                p.IsDirectory,
                p.ToFullPath(),
                p.Length,
                p.LastWriteTimeUtc
            ),
            new()
            {
                RecurseSubdirectories = true,
            })
        {
            ShouldIncludePredicate = (ref FileSystemEntry p) => p.ToFullPath().EndsWith(endsWith, true, null)
        };

        foreach (var file in fse.Skip(skip).Take(take))
        {
            yield return file.path;
        }
    }
}