archived-discord-bot/CompatBot/Utils/ResultFormatters/TitlePatchFormatter.cs

using System.IO;
using CompatApiClient.Utils;
using CompatBot.Database.Providers;
using CompatBot.ThumbScrapper;
using PsnClient.POCOs;

namespace CompatBot.Utils.ResultFormatters;

internal static class TitlePatchFormatter
{
    // thanks BCES00569
    public static async Task<List<DiscordEmbedBuilder>> AsEmbedAsync(this TitlePatch? patch, DiscordClient client, string productCode)
    {
        var result = new List<DiscordEmbedBuilder>();
        var pkgs = patch?.Tag?.Packages;
        var title = pkgs?.Select(p => p.ParamSfo?.Title).LastOrDefault(t => !string.IsNullOrEmpty(t))
                    ?? await ThumbnailProvider.GetTitleNameAsync(productCode, Config.Cts.Token).ConfigureAwait(false)
                    ?? productCode;
        var thumbnailUrl = await client.GetThumbnailUrlAsync(productCode).ConfigureAwait(false);
        var embedBuilder = new DiscordEmbedBuilder
        {
            Title = title,
            Color = Config.Colors.DownloadLinks,
        }.WithThumbnail(thumbnailUrl);
        if (pkgs?.Length > 1)
        {
            var pages = pkgs.Length / EmbedPager.MaxFields + (pkgs.Length % EmbedPager.MaxFields == 0 ? 0 : 1);
            if (pages > 1)
                embedBuilder.Title = $"{title} [Part 1 of {pages}]".Trim(EmbedPager.MaxFieldTitleLength);
            embedBuilder.Description = $"""
                ℹ️ Total download size of all {pkgs.Length} packages is {pkgs.Sum(p => p.Size).AsStorageUnit()}.

                ⚠️ You **must** install listed updates in order, starting with the first one. You **can not** skip intermediate versions.
                """;
            var i = 0;
            do
            {
                var pkg = pkgs[i++];
                embedBuilder.AddField($"Update v{pkg.Version} ({pkg.Size.AsStorageUnit()})", $"[⏬ {GetLinkName(pkg.Url)}]({pkg.Url})");
                if (i % EmbedPager.MaxFields == 0)
                {
                    result.Add(embedBuilder);
                    embedBuilder = new DiscordEmbedBuilder
                    {
                        Title = $"{title} [Part {i / EmbedPager.MaxFields + 1} of {pages}]".Trim(EmbedPager.MaxFieldTitleLength),
                        Color = Config.Colors.DownloadLinks,
                    }.WithThumbnail(thumbnailUrl);
                }
            } while (i < pkgs.Length);
        }
        else if (pkgs?.Length == 1)
        {
            embedBuilder.Title = $"{title} update v{pkgs[0].Version} ({pkgs[0].Size.AsStorageUnit()})";
            embedBuilder.Description = $"[⏬ {Path.GetFileName(GetLinkName(pkgs[0].Url))}]({pkgs[0].Url})";
        }
        else if (patch != null)
            embedBuilder.Description = "No updates available";
        else
            embedBuilder.Description = "No update information available";
        if (!result.Any() || embedBuilder.Fields.Any())
            result.Add(embedBuilder);
        if (patch?.OfflineCacheTimestamp is DateTime cacheTimestamp)
            result[^1].WithFooter($"Offline cache, last updated {(DateTime.UtcNow - cacheTimestamp).AsTimeDeltaDescription()} ago");
        return result;
    }

    private static string GetLinkName(string link)
    {
        var fname = Path.GetFileName(link);
        try
        {
            var match = PsnScraper.ContentIdMatcher().Match(fname);
            if (match.Success)
                return fname[20..];
        }
        catch { }
        return fname;
    }
}