LANCommander/LANCommander.Server.Services/IGDBService.cs

using IGDB;
using IGDB.Models;
using Microsoft.Extensions.Logging;
using System.Text;

namespace LANCommander.Server.Services
{
    public class IGDBService : BaseService
    {
        private const string DefaultFields = "*";
        private IGDBClient Client;

        public bool Authenticated = false;

        private string ClientId { get; set; }
        private string ClientSecret { get; set; }

        public IGDBService(ILogger<IGDBService> logger) : base(logger)
        {
            Authenticate();
        }

        public void Authenticate()
        {
            ClientId = Settings.IGDBClientId;
            ClientSecret = Settings.IGDBClientSecret;

            try
            {
                if (String.IsNullOrWhiteSpace(ClientId) || String.IsNullOrWhiteSpace(ClientSecret))
                    throw new Exception("Invalid IGDB credentials");

                Client = new IGDBClient(ClientId, ClientSecret);
                Authenticated = true;
            }
            catch (Exception ex)
            {
                Authenticated = false;
            }
        }

        public async Task<Game> GetAsync(long id, params string[] additionalFields)
        {
            var fields = DefaultFields.Split(',').ToList();

            fields.AddRange(additionalFields);

            var games = await Client.QueryAsync<Game>(IGDBClient.Endpoints.Games, $"fields {String.Join(',', fields)}; where id = {id};");

            if (games == null)
                return null;

            return games.FirstOrDefault();
        }

        public async Task<IEnumerable<Game>> SearchAsync(string input, int limit = 10, int offset = 0, params string[] additionalFields)
        {
            var fields = DefaultFields.Split(',').ToList();

            fields.AddRange(additionalFields);

            int[] categories = new int[]
            {
                (int)Category.MainGame,
                (int)Category.Port,
                (int)Category.StandaloneExpansion,
                (int)Category.Expansion,
                (int)Category.Mod,
                (int)Category.Remake,
                (int)Category.Remaster
            };

            var sb = new StringBuilder();

            sb.Append($"search \"{input}\";");
            sb.Append($"fields {String.Join(',', fields)};");
            sb.Append($"limit {limit};");
            sb.Append($"offset {offset};");
            sb.Append($"where category = ({String.Join(',', categories)});");

            var games = await Client.QueryAsync<Game>(IGDBClient.Endpoints.Games, sb.ToString());

            return games.AsEnumerable();
        }
    }
}