2017-11-01 23:24:22 +00:00
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using Discord.WebSocket;
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using Newtonsoft.Json.Linq;
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using Noikoio.RegexBot.ConfigItem;
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2017-11-05 22:58:50 +00:00
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using NpgsqlTypes;
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2017-11-01 23:24:22 +00:00
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using System;
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2017-10-30 03:04:57 +00:00
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using System.Collections.Generic;
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using System.Threading.Tasks;
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namespace Noikoio.RegexBot.Feature.DBCache
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{
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/// <summary>
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/// Caches information regarding all known guilds, channels, and users.
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/// The function of this feature should be transparent to the user, and thus no configuration is needed.
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/// </summary>
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class EntityCache : BotFeature
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{
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private readonly DatabaseConfig _db;
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public override string Name => nameof(EntityCache);
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public EntityCache(DiscordSocketClient client) : base(client)
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{
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_db = RegexBot.Config.Database;
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if (_db.Enabled)
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{
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client.GuildAvailable += Client_GuildAvailable;
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client.GuildUpdated += Client_GuildUpdated;
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client.GuildMemberUpdated += Client_GuildMemberUpdated;
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// it may not be necessary to handle JoinedGuild, as GuildAvailable provides this info
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}
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else
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{
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Log("No database storage available.").Wait();
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}
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}
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public override Task<object> ProcessConfiguration(JToken configSection) => Task.FromResult<object>(null);
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2017-11-01 23:24:22 +00:00
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#region Event handling
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// Guild _and_ guild member information has become available
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private async Task Client_GuildAvailable(SocketGuild arg)
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{
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await CreateCacheTables(arg.Id);
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await Task.Run(() => UpdateGuild(arg));
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await Task.Run(() => UpdateGuildMember(arg.Id, arg.Users));
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}
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// Guild information has changed
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private async Task Client_GuildUpdated(SocketGuild arg1, SocketGuild arg2)
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{
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await Task.Run(() => UpdateGuild(arg2));
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}
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// Guild member information has changed
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private async Task Client_GuildMemberUpdated(SocketGuildUser arg1, SocketGuildUser arg2)
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{
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await Task.Run(() => UpdateGuildMember(arg2));
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}
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#endregion
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#region Table setup
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public const string TableGuild = "cache_guild";
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const string TableUser = "cache_users";
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private async Task CreateCacheTables(ulong gid)
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{
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using (var db = await _db.GetOpenConnectionAsync())
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{
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using (var c = db.CreateCommand())
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{
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c.CommandText = "CREATE TABLE IF NOT EXISTS " + TableGuild + "("
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+ "guild_id bigint primary key, "
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+ "current_name text not null, "
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+ "display_name text null"
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+ ")";
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// TODO determine if other columns necessary?
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await c.ExecuteNonQueryAsync();
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}
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using (var c = db.CreateCommand())
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{
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c.CommandText = "CREATE TABLE IF NOT EXISTS " + TableUser + "("
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+ "user_id bigint, "
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+ "guild_id bigint references " + TableGuild + " (guild_id), "
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+ "cache_date timestamptz not null, "
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+ "username text not null, "
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+ "discriminator text not null, "
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+ "nickname text null, "
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+ "avatar_url text null"
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+ ")";
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await c.ExecuteNonQueryAsync();
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}
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using (var c = db.CreateCommand())
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{
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c.CommandText = "CREATE UNIQUE INDEX IF NOT EXISTS "
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+ $"{TableUser}_idx on {TableUser} (user_id, guild_id)";
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await c.ExecuteNonQueryAsync();
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}
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}
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}
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#endregion
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private async Task UpdateGuild(SocketGuild g)
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{
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using (var db = await _db.GetOpenConnectionAsync())
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{
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using (var c = db.CreateCommand())
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{
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c.CommandText = "INSERT INTO " + TableGuild + " (guild_id, current_name) "
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+ "(@GuildId, @CurrentName) "
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+ "ON CONFLICT (guild_id) DO UPDATE SET "
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+ "current_name = EXCLUDED.current_name";
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c.Parameters.Add("@GuildID", NpgsqlDbType.Bigint).Value = g.Id;
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c.Parameters.Add("@CurrentName", NpgsqlDbType.Text).Value = g.Name;
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c.Prepare();
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await c.ExecuteNonQueryAsync();
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}
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}
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}
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private async Task UpdateGuildMember(ulong gid, IEnumerable<SocketGuildUser> users)
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{
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using (var db = await _db.GetOpenConnectionAsync())
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{
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using (var c = db.CreateCommand())
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{
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c.CommandText = "INSERT INTO " + TableUser + " VALUES "
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+ "(@Uid, @Gid, @Date, @Uname, @Disc, @Nname, @Url) "
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+ "ON CONFLICT (user_id, guild_id) DO UPDATE SET "
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+ "cache_date = EXCLUDED.cache_date, username = EXCLUDED.username, "
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+ "discriminator = EXCLUDED.discriminator, " // I've seen someone's discriminator change this one time...
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+ "nickname = EXCLUDED.nickname, avatar_url = EXCLUDED.avatar_url";
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c.Prepare();
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var now = DateTime.Now;
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List<Task> inserts = new List<Task>();
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foreach (var item in users)
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{
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c.Parameters.Clear();
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c.Parameters.Add("@Uid", NpgsqlDbType.Bigint).Value = item.Id;
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c.Parameters.Add("@Gid", NpgsqlDbType.Bigint).Value = item.Guild.Id;
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c.Parameters.Add("@Date", NpgsqlDbType.TimestampTZ).Value = now;
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c.Parameters.Add("@Uname", NpgsqlDbType.Text).Value = item.Username;
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c.Parameters.Add("@Disc", NpgsqlDbType.Text).Value = item.Discriminator;
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c.Parameters.Add("@Nname", NpgsqlDbType.Text).Value = item.Nickname;
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c.Parameters.Add("@Url", NpgsqlDbType.Text).Value = item.GetAvatarUrl();
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await c.ExecuteNonQueryAsync();
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}
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}
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}
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}
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private Task UpdateGuildMember(SocketGuildUser user)
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{
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var gid = user.Guild.Id;
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var ml = new SocketGuildUser[] { user };
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return UpdateGuildMember(gid, ml);
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}
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}
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}
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