417 lines
20 KiB
C#
417 lines
20 KiB
C#
using System.Collections.Generic;
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using System.Linq;
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using System.Threading.Tasks;
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using Dapper;
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using NodaTime;
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using Serilog;
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namespace PluralKit.Core {
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public class PostgresDataStore: IDataStore {
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private IDatabase _conn;
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private ILogger _logger;
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public PostgresDataStore(IDatabase conn, ILogger logger)
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{
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_conn = conn;
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_logger = logger;
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}
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public async Task<IEnumerable<PKMember>> GetConflictingProxies(PKSystem system, ProxyTag tag)
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{
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using (var conn = await _conn.Obtain())
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// return await conn.QueryAsync<PKMember>("select * from (select *, (unnest(proxy_tags)).prefix as prefix, (unnest(proxy_tags)).suffix as suffix from members where system = @System) as _ where prefix ilike @Prefix and suffix ilike @Suffix", new
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// {
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// System = system.Id,
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// Prefix = tag.Prefix.Replace("%", "\\%") + "%",
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// Suffix = "%" + tag.Suffix.Replace("%", "\\%")
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// });
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return await conn.QueryAsync<PKMember>("select * from (select *, (unnest(proxy_tags)).prefix as prefix, (unnest(proxy_tags)).suffix as suffix from members where system = @System) as _ where prefix = @Prefix and suffix = @Suffix", new
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{
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System = system.Id,
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Prefix = tag.Prefix,
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Suffix = tag.Suffix
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});
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}
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public async Task<PKSystem> CreateSystem(string systemName = null) {
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PKSystem system;
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using (var conn = await _conn.Obtain())
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system = await conn.QuerySingleAsync<PKSystem>("insert into systems (hid, name) values (find_free_system_hid(), @Name) returning *", new { Name = systemName });
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_logger.Information("Created system {System}", system.Id);
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// New system has no accounts, therefore nothing gets cached, therefore no need to invalidate caches right here
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return system;
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}
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public async Task AddAccount(PKSystem system, ulong accountId) {
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// We have "on conflict do nothing" since linking an account when it's already linked to the same system is idempotent
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// This is used in import/export, although the pk;link command checks for this case beforehand
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using (var conn = await _conn.Obtain())
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await conn.ExecuteAsync("insert into accounts (uid, system) values (@Id, @SystemId) on conflict do nothing", new { Id = accountId, SystemId = system.Id });
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_logger.Information("Linked system {System} to account {Account}", system.Id, accountId);
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}
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public async Task RemoveAccount(PKSystem system, ulong accountId) {
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using (var conn = await _conn.Obtain())
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await conn.ExecuteAsync("delete from accounts where uid = @Id and system = @SystemId", new { Id = accountId, SystemId = system.Id });
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_logger.Information("Unlinked system {System} from account {Account}", system.Id, accountId);
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}
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public async Task<PKSystem> GetSystemByAccount(ulong accountId) {
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using (var conn = await _conn.Obtain())
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return await conn.QuerySingleOrDefaultAsync<PKSystem>("select systems.* from systems, accounts where accounts.system = systems.id and accounts.uid = @Id", new { Id = accountId });
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}
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public async Task<PKSystem> GetSystemByHid(string hid) {
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using (var conn = await _conn.Obtain())
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return await conn.QuerySingleOrDefaultAsync<PKSystem>("select * from systems where systems.hid = @Hid", new { Hid = hid.ToLower() });
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}
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public async Task<PKSystem> GetSystemByToken(string token) {
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using (var conn = await _conn.Obtain())
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return await conn.QuerySingleOrDefaultAsync<PKSystem>("select * from systems where token = @Token", new { Token = token });
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}
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public async Task<PKSystem> GetSystemById(int id)
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{
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using (var conn = await _conn.Obtain())
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return await conn.QuerySingleOrDefaultAsync<PKSystem>("select * from systems where id = @Id", new { Id = id });
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}
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public async Task SaveSystem(PKSystem system) {
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using (var conn = await _conn.Obtain())
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await conn.ExecuteAsync("update systems set name = @Name, description = @Description, tag = @Tag, avatar_url = @AvatarUrl, token = @Token, ui_tz = @UiTz, description_privacy = @DescriptionPrivacy, member_list_privacy = @MemberListPrivacy, front_privacy = @FrontPrivacy, front_history_privacy = @FrontHistoryPrivacy, pings_enabled = @PingsEnabled where id = @Id", system);
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_logger.Information("Updated system {@System}", system);
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}
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public async Task DeleteSystem(PKSystem system)
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{
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using var conn = await _conn.Obtain();
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// Fetch the list of accounts *before* deletion so we can cache-bust all of those
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var accounts = (await conn.QueryAsync<ulong>("select uid from accounts where system = @Id", system)).ToArray();
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await conn.ExecuteAsync("delete from systems where id = @Id", system);
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_logger.Information("Deleted system {System}", system.Id);
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}
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public async Task<IEnumerable<ulong>> GetSystemAccounts(PKSystem system)
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{
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using (var conn = await _conn.Obtain())
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return await conn.QueryAsync<ulong>("select uid from accounts where system = @Id", new { Id = system.Id });
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}
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public async Task DeleteAllSwitches(PKSystem system)
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{
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using (var conn = await _conn.Obtain())
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await conn.ExecuteAsync("delete from switches where system = @Id", system);
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}
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public async Task<PKMember> CreateMember(SystemId system, string name) {
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PKMember member;
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using (var conn = await _conn.Obtain())
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member = await conn.QuerySingleAsync<PKMember>("insert into members (hid, system, name) values (find_free_member_hid(), @SystemId, @Name) returning *", new {
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SystemID = system,
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Name = name
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});
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_logger.Information("Created member {Member}", member.Id);
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return member;
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}
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public async Task<PKMember> GetMemberById(MemberId id) {
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using (var conn = await _conn.Obtain())
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return await conn.QuerySingleOrDefaultAsync<PKMember>("select * from members where id = @Id", new { Id = id });
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}
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public async Task<PKMember> GetMemberByHid(string hid) {
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using (var conn = await _conn.Obtain())
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return await conn.QuerySingleOrDefaultAsync<PKMember>("select * from members where hid = @Hid", new { Hid = hid.ToLower() });
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}
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public async Task<PKMember> GetMemberByName(PKSystem system, string name) {
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// QueryFirst, since members can (in rare cases) share names
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using (var conn = await _conn.Obtain())
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return await conn.QueryFirstOrDefaultAsync<PKMember>("select * from members where lower(name) = lower(@Name) and system = @SystemID", new { Name = name, SystemID = system.Id });
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}
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public IAsyncEnumerable<PKMember> GetSystemMembers(PKSystem system, bool orderByName)
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{
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var sql = "select * from members where system = @SystemID";
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if (orderByName) sql += " order by lower(name) asc";
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return _conn.QueryStreamAsync<PKMember>(sql, new { SystemID = system.Id });
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}
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public async Task SaveMember(PKMember member) {
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using (var conn = await _conn.Obtain())
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await conn.ExecuteAsync("update members set name = @Name, display_name = @DisplayName, description = @Description, color = @Color, avatar_url = @AvatarUrl, birthday = @Birthday, pronouns = @Pronouns, proxy_tags = @ProxyTags, keep_proxy = @KeepProxy, member_privacy = @MemberPrivacy where id = @Id", member);
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_logger.Information("Updated member {@Member}", member);
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}
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public async Task DeleteMember(PKMember member) {
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using (var conn = await _conn.Obtain())
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await conn.ExecuteAsync("delete from members where id = @Id", member);
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_logger.Information("Deleted member {@Member}", member);
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}
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public async Task<int> GetSystemMemberCount(SystemId id, bool includePrivate)
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{
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var query = "select count(*) from members where system = @id";
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if (!includePrivate) query += " and member_privacy = 1"; // 1 = public
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using (var conn = await _conn.Obtain())
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return await conn.ExecuteScalarAsync<int>(query, new { id });
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}
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public async Task<ulong> GetTotalMembers()
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{
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using (var conn = await _conn.Obtain())
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return await conn.ExecuteScalarAsync<ulong>("select count(id) from members");
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}
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public async Task AddMessage(IPKConnection conn, ulong senderId, ulong guildId, ulong channelId, ulong postedMessageId, ulong triggerMessageId, MemberId proxiedMemberId) {
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// "on conflict do nothing" in the (pretty rare) case of duplicate events coming in from Discord, which would lead to a DB error before
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await conn.ExecuteAsync("insert into messages(mid, guild, channel, member, sender, original_mid) values(@MessageId, @GuildId, @ChannelId, @MemberId, @SenderId, @OriginalMid) on conflict do nothing", new {
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MessageId = postedMessageId,
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GuildId = guildId,
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ChannelId = channelId,
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MemberId = proxiedMemberId,
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SenderId = senderId,
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OriginalMid = triggerMessageId
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});
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_logger.Debug("Stored message {Message} in channel {Channel}", postedMessageId, channelId);
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}
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public async Task<FullMessage> GetMessage(ulong id)
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{
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using (var conn = await _conn.Obtain())
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return (await conn.QueryAsync<PKMessage, PKMember, PKSystem, FullMessage>("select messages.*, members.*, systems.* from messages, members, systems where (mid = @Id or original_mid = @Id) and messages.member = members.id and systems.id = members.system", (msg, member, system) => new FullMessage
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{
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Message = msg,
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System = system,
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Member = member
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}, new { Id = id })).FirstOrDefault();
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}
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public async Task DeleteMessage(ulong id) {
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using (var conn = await _conn.Obtain())
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if (await conn.ExecuteAsync("delete from messages where mid = @Id", new { Id = id }) > 0)
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_logger.Information("Deleted message {Message}", id);
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}
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public async Task DeleteMessagesBulk(IReadOnlyCollection<ulong> ids)
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{
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using (var conn = await _conn.Obtain())
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{
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// Npgsql doesn't support ulongs in general - we hacked around it for plain ulongs but tbh not worth it for collections of ulong
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// Hence we map them to single longs, which *are* supported (this is ok since they're Technically (tm) stored as signed longs in the db anyway)
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var foundCount = await conn.ExecuteAsync("delete from messages where mid = any(@Ids)", new {Ids = ids.Select(id => (long) id).ToArray()});
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if (foundCount > 0)
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_logger.Information("Bulk deleted messages {Messages}, {FoundCount} found", ids, foundCount);
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}
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}
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public async Task AddSwitch(SystemId system, IEnumerable<PKMember> members)
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{
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// Use a transaction here since we're doing multiple executed commands in one
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await using var conn = await _conn.Obtain();
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await using var tx = await conn.BeginTransactionAsync();
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// First, we insert the switch itself
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var sw = await conn.QuerySingleAsync<PKSwitch>("insert into switches(system) values (@System) returning *",
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new {System = system});
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// Then we insert each member in the switch in the switch_members table
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// TODO: can we parallelize this or send it in bulk somehow?
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foreach (var member in members)
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{
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await conn.ExecuteAsync(
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"insert into switch_members(switch, member) values(@Switch, @Member)",
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new {Switch = sw.Id, Member = member.Id});
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}
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// Finally we commit the tx, since the using block will otherwise rollback it
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await tx.CommitAsync();
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_logger.Information("Registered switch {Switch} in system {System} with members {@Members}", sw.Id, system, members.Select(m => m.Id));
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}
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public IAsyncEnumerable<PKSwitch> GetSwitches(SystemId system)
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{
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// TODO: refactor the PKSwitch data structure to somehow include a hydrated member list
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// (maybe when we get caching in?)
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return _conn.QueryStreamAsync<PKSwitch>(
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"select * from switches where system = @System order by timestamp desc",
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new {System = system});
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}
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public async Task<int> GetSwitchCount(PKSystem system)
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{
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using var conn = await _conn.Obtain();
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return await conn.QuerySingleAsync<int>("select count(*) from switches where system = @Id", system);
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}
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public async IAsyncEnumerable<SwitchMembersListEntry> GetSwitchMembersList(PKSystem system, Instant start, Instant end)
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{
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// Wrap multiple commands in a single transaction for performance
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await using var conn = await _conn.Obtain();
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await using var tx = await conn.BeginTransactionAsync();
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// Find the time of the last switch outside the range as it overlaps the range
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// If no prior switch exists, the lower bound of the range remains the start time
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var lastSwitch = await conn.QuerySingleOrDefaultAsync<Instant>(
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@"SELECT COALESCE(MAX(timestamp), @Start)
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FROM switches
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WHERE switches.system = @System
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AND switches.timestamp < @Start",
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new { System = system.Id, Start = start });
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// Then collect the time and members of all switches that overlap the range
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var switchMembersEntries = conn.QueryStreamAsync<SwitchMembersListEntry>(
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@"SELECT switch_members.member, switches.timestamp
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FROM switches
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LEFT JOIN switch_members
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ON switches.id = switch_members.switch
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WHERE switches.system = @System
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AND (
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switches.timestamp >= @Start
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OR switches.timestamp = @LastSwitch
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)
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AND switches.timestamp < @End
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ORDER BY switches.timestamp DESC",
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new { System = system.Id, Start = start, End = end, LastSwitch = lastSwitch });
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// Yield each value here
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await foreach (var entry in switchMembersEntries)
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yield return entry;
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// Don't really need to worry about the transaction here, we're not doing any *writes*
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}
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public IAsyncEnumerable<PKMember> GetSwitchMembers(PKSwitch sw)
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{
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return _conn.QueryStreamAsync<PKMember>(
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"select * from switch_members, members where switch_members.member = members.id and switch_members.switch = @Switch order by switch_members.id",
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new {Switch = sw.Id});
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}
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public async Task<PKSwitch> GetLatestSwitch(SystemId system) =>
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await GetSwitches(system).FirstOrDefaultAsync();
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public async Task MoveSwitch(PKSwitch sw, Instant time)
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{
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using (var conn = await _conn.Obtain())
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await conn.ExecuteAsync("update switches set timestamp = @Time where id = @Id",
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new {Time = time, Id = sw.Id});
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_logger.Information("Moved switch {Switch} to {Time}", sw.Id, time);
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}
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public async Task DeleteSwitch(PKSwitch sw)
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{
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using (var conn = await _conn.Obtain())
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await conn.ExecuteAsync("delete from switches where id = @Id", new {Id = sw.Id});
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_logger.Information("Deleted switch {Switch}");
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}
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public async Task<IEnumerable<SwitchListEntry>> GetPeriodFronters(PKSystem system, Instant periodStart, Instant periodEnd)
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{
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// TODO: IAsyncEnumerable-ify this one
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// Returns the timestamps and member IDs of switches overlapping the range, in chronological (newest first) order
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var switchMembers = await GetSwitchMembersList(system, periodStart, periodEnd).ToListAsync();
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// query DB for all members involved in any of the switches above and collect into a dictionary for future use
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// this makes sure the return list has the same instances of PKMember throughout, which is important for the dictionary
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// key used in GetPerMemberSwitchDuration below
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Dictionary<MemberId, PKMember> memberObjects;
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using (var conn = await _conn.Obtain())
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{
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memberObjects = (
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await conn.QueryAsync<PKMember>(
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"select * from members where id = any(@Switches)", // lol postgres specific `= any()` syntax
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new { Switches = switchMembers.Select(m => m.Member).Distinct().ToList() })
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).ToDictionary(m => m.Id);
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}
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// Initialize entries - still need to loop to determine the TimespanEnd below
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var entries =
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from item in switchMembers
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group item by item.Timestamp into g
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select new SwitchListEntry
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{
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TimespanStart = g.Key,
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Members = g.Where(x => x.Member != default(MemberId)).Select(x => memberObjects[x.Member]).ToList()
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};
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// Loop through every switch that overlaps the range and add it to the output list
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// end time is the *FOLLOWING* switch's timestamp - we cheat by working backwards from the range end, so no dates need to be compared
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var endTime = periodEnd;
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var outList = new List<SwitchListEntry>();
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foreach (var e in entries)
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{
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// Override the start time of the switch if it's outside the range (only true for the "out of range" switch we included above)
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var switchStartClamped = e.TimespanStart < periodStart
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? periodStart
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: e.TimespanStart;
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outList.Add(new SwitchListEntry
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{
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Members = e.Members,
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TimespanStart = switchStartClamped,
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TimespanEnd = endTime
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});
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// next switch's end is this switch's start (we're working backward in time)
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endTime = e.TimespanStart;
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}
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return outList;
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}
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public async Task<FrontBreakdown> GetFrontBreakdown(PKSystem system, Instant periodStart, Instant periodEnd)
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{
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var dict = new Dictionary<PKMember, Duration>();
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var noFronterDuration = Duration.Zero;
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// Sum up all switch durations for each member
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// switches with multiple members will result in the duration to add up to more than the actual period range
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var actualStart = periodEnd; // will be "pulled" down
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var actualEnd = periodStart; // will be "pulled" up
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foreach (var sw in await GetPeriodFronters(system, periodStart, periodEnd))
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{
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var span = sw.TimespanEnd - sw.TimespanStart;
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foreach (var member in sw.Members)
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{
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if (!dict.ContainsKey(member)) dict.Add(member, span);
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else dict[member] += span;
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}
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if (sw.Members.Count == 0) noFronterDuration += span;
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if (sw.TimespanStart < actualStart) actualStart = sw.TimespanStart;
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if (sw.TimespanEnd > actualEnd) actualEnd = sw.TimespanEnd;
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}
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return new FrontBreakdown
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{
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MemberSwitchDurations = dict,
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NoFronterDuration = noFronterDuration,
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RangeStart = actualStart,
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RangeEnd = actualEnd
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};
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}
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}
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} |