Program.cs

using System;
using System.IO;
using System.Diagnostics;
using System.CodeDom;

namespace VRCDynamicPoster;
public class Program
{
    public static readonly string ASSET_PATH = "asset";
    public static readonly string VRC_WORLD_BASE_URL = "https://vrchat.com/home/world/{id}";
    public static readonly string VRC_AVATAR_BASE_URL = "https://vrchat.com/home/avatar/{id}";
    public static readonly int LIMIT_ENTRY_NUM = 128;

    public static readonly string DST_DIR = "dst";
    public static readonly string PREVIEW_HTML_NAME = "index.html";
    public static readonly string PREVIEW_IMAGE_NAME = "index.bmp";
    private static void Main(string[] args)
    {
        // デフォルト or コマンドラインから設定
        var assetDir = args.Length > 2 ? args[1] : ASSET_PATH;
        var worldBaseUrl = args.Length > 3 ? args[2] : VRC_WORLD_BASE_URL;
        var avatarBaseUrl = args.Length > 4 ? args[3] : VRC_AVATAR_BASE_URL;
        var limitNum = args.Length > 5 ? int.Parse(args[4]) : LIMIT_ENTRY_NUM;
        // 現状帰る必要なさそう
        var dstDir = DST_DIR;
        var previewHtmlName = PREVIEW_HTML_NAME;
        var previewImageName = PREVIEW_IMAGE_NAME;

        Console.WriteLine("== VRCDynamicPoster ==");
        Console.WriteLine($"{nameof(assetDir)}={assetDir}");
        Console.WriteLine($"{nameof(worldBaseUrl)}={worldBaseUrl}");
        Console.WriteLine($"{nameof(avatarBaseUrl)}={avatarBaseUrl}");
        Console.WriteLine($"{nameof(limitNum)}={limitNum}");
        Console.WriteLine($"{nameof(dstDir)}={dstDir}");
        Console.WriteLine($"{nameof(previewHtmlName)}={previewHtmlName}");
        Console.WriteLine($"{nameof(previewImageName)}={previewImageName}");

        // 前回出力を破棄
        if (Directory.Exists(dstDir))
        {
            Directory.Delete(dstDir, true);
        }
        Directory.CreateDirectory(dstDir);

        // ファイル一覧を取得
        var entries =
            Directory.GetFiles(assetDir)
                     .Select((srcDir, i) => new Entry(i, srcDir, dstDir, worldBaseUrl, avatarBaseUrl))
                     .ToArray();
        Console.WriteLine("encode_files={");
        foreach (var e in entries)
        {
            Console.WriteLine($"\t{e},");
        }
        Console.WriteLine("}");
        if (entries.Length == 0)
        {
            Console.WriteLine($"entry not found. assetDir={assetDir}");
            return;
        }

        // Limit確認。削る
        if (entries.Length >= limitNum)
        {
            Console.WriteLine($"[WARN] entries > limitNum({limitNum})");
            entries = entries.Take(limitNum).ToArray();
        }

        // Preview生成
        var preview = new Preview(entries);
        var htmlText = preview.TransformText();
        var htmlPath = Path.Combine(dstDir, previewHtmlName);
        File.WriteAllText(htmlPath, htmlText);
        Console.WriteLine($"preview page: {htmlPath}");

        // asset/worldの画像コピー
        foreach (var e in entries)
        {
            e.Copy();
            Console.WriteLine($"copy: {e.ImageSrcPath} => {e.ImageDstPath}");
        }

        // エンコードした画像を生成
        var encodeImagePath = Path.Combine(dstDir, previewImageName);
        Console.WriteLine($"encode image: {encodeImagePath}");
        TextImageGenerator.Encode(encodeImagePath, entries, limitNum);

        // デコードテスト
        var decodeEntries = TextImageGenerator.Decode(Path.Combine(dstDir, previewImageName)).ToArray();
        bool isVerifyPass = true;
        foreach (var (encode, decode) in entries.Zip(decodeEntries))
        {
            var isEquals = encode.Id.Equals(decode);
            if (!isEquals)
            {
                isVerifyPass = false;
                Console.WriteLine($"[FAIL] encode: {encode.Id}, decode: {decode}");
            }
        }
        Console.WriteLine($"decode test: {(isVerifyPass ? "PASS" : "FAIL")}");
        Console.WriteLine();

        Console.WriteLine("All processes are complete.");
    }
}