nadekobot/src/NadekoBot/Modules/Nsfw/Common/Downloaders/KonachanImageDownloader.cs

using System.Collections.Generic;
using System.Linq;
using System.Net.Http;
using System.Net.Http.Json;
using System.Threading;
using System.Threading.Tasks;

namespace NadekoBot.Modules.Nsfw.Common
{
    public sealed class KonachanImageDownloader : ImageDownloader<DapiImageObject>
    {
        private readonly string _baseUrl;

        public KonachanImageDownloader(HttpClient http)
            : base(Booru.Konachan, http)
        {
            _baseUrl = "https://konachan.com";
        }

        public override async Task<List<DapiImageObject>> DownloadImagesAsync(string[] tags, int page, bool isExplicit = false, CancellationToken cancel = default)
        {
            var tagString = ImageDownloaderHelper.GetTagString(tags, isExplicit);
            var uri = $"{_baseUrl}/post.json?s=post&q=index&limit=200&tags={tagString}&page={page}";
            var imageObjects = await _http.GetFromJsonAsync<DapiImageObject[]>(uri, _serializerOptions, cancel)
                .ConfigureAwait(false);
            if (imageObjects is null)
                return new();
            return imageObjects
                .Where(x => x.FileUrl is not null)
                .ToList();
        }
    }
}