DiscordAvatar.cs

using Discord;

// Original work by Rapptz
// Copyright (c) 2015-2016 Rapptz
// Source: https://github.com/Rapptz/discord.py/commit/5f776f369d350c005d419925e89e9ef9e5ff94ee#diff-e42d1e46f30339be8fb6f28250923015

// Copyright(c) 2017 Simon Farshid

// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the "Software"),
// to deal in the Software without restriction, including without limitation
// the rights to use, copy, modify, merge, publish, distribute, sublicense,
// and/or sell copies of the Software, and to permit persons to whom the
// Software is furnished to do so, subject to the following conditions:

// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.

// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
// DEALINGS IN THE SOFTWARE.

namespace Yonom.DiscordTools
{
    static class DiscordAvatar
    {
        private static readonly string[] _defaultAvatars =
        {
            "6debd47ed13483642cf09e832ed0bc1b", // blurple 
            "322c936a8c8be1b803cd94861bdfa868", // grey 
            "dd4dbc0016779df1378e7812eabaa04d", // green
            "dd4dbc0016779df1378e7812eabaa04d", // orange 
            "dd4dbc0016779df1378e7812eabaa04d", // red 
        };

        public static string GetAvatarUrlOrDefault(this IUser user)
        {
            return user.GetAvatarUrl() ?? GetDefaultAvatarUrl(user);
        }


        public static string GetDefaultAvatarUrl(this IUser user)
        {
            var imageId = _defaultAvatars[user.DiscriminatorValue % _defaultAvatars.Length];
            return $"https://discordapp.com/assets/{imageId}.png";
        }
    }
}