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/*
Spacebar: A FOSS re-implementation and extension of the Discord.com backend.
Copyright (C) 2023 Spacebar and Spacebar Contributors
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published
by the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
import { Payload, WebSocket } from "@spacebar/gateway";
import { Config, emitEvent, Guild, Member, VoiceServerUpdateEvent, VoiceState, VoiceStateUpdateEvent } from "@spacebar/util";
import { genVoiceToken } from "@spacebar/gateway";
import { check } from "./instanceOf";
import { Region, VoiceStateUpdateSchema } from "@spacebar/schemas";
// TODO: check if a voice server is setup
// Notice: Bot users respect the voice channel's user limit, if set.
// When the voice channel is full, you will not receive the Voice State Update or Voice Server Update events in response to your own Voice State Update.
// Having MANAGE_CHANNELS permission bypasses this limit and allows you to join regardless of the channel being full or not.
export async function onVoiceStateUpdate(this: WebSocket, data: Payload) {
const startTime = Date.now();
check.call(this, VoiceStateUpdateSchema, data.d);
const body = data.d as VoiceStateUpdateSchema;
const isNew = body.channel_id === null && body.guild_id === null;
let isChanged = false;
let prevState;
let voiceState: VoiceState;
try {
voiceState = await VoiceState.findOneOrFail({
where: { user_id: this.user_id },
});
if (voiceState.session_id !== this.session_id && body.channel_id === null) {
//Should we also check guild_id === null?
//changing deaf or mute on a client that's not the one with the same session of the voicestate in the database should be ignored
return;
}
if (voiceState.channel_id !== body.channel_id) isChanged = true;
//If a user change voice channel between guild we should send a left event first
if (voiceState.guild_id && voiceState.guild_id !== body.guild_id && voiceState.session_id === this.session_id) {
await emitEvent({
event: "VOICE_STATE_UPDATE",
data: { ...voiceState.toPublicVoiceState(), channel_id: null },
guild_id: voiceState.guild_id,
});
}
//The event send by Discord's client on channel leave has both guild_id and channel_id as null
//if (body.guild_id === null) body.guild_id = voiceState.guild_id;
prevState = { ...voiceState };
VoiceState.merge(voiceState, body);
} catch (error) {
voiceState = VoiceState.create({
...body,
user_id: this.user_id,
deaf: false,
mute: false,
suppress: false,
});
isChanged = true;
}
// if user left voice channel, send an update to previous channel/guild to let other people know that the user left
if (voiceState.session_id === this.session_id && body.guild_id == null && body.channel_id == null && (prevState?.guild_id || prevState?.channel_id)) {
await emitEvent({
event: "VOICE_STATE_UPDATE",
data: {
...voiceState.toPublicVoiceState(),
channel_id: null,
guild_id: null,
},
guild_id: prevState?.guild_id,
channel_id: prevState?.channel_id,
});
}
//TODO the member should only have these properties: hoisted_role, deaf, joined_at, mute, roles, user
//TODO the member.user should only have these properties: avatar, discriminator, id, username
//TODO this may fail
if (body.guild_id) {
const member = await Member.findOne({
where: { id: voiceState.user_id, guild_id: voiceState.guild_id },
relations: { user: true, roles: true },
});
if (member) {
voiceState.member = member;
}
}
//If the session changed we generate a new token
if (voiceState.session_id !== this.session_id) voiceState.token = genVoiceToken();
voiceState.session_id = this.session_id;
const { member } = voiceState;
await Promise.all([
voiceState.save(),
emitEvent({
event: "VOICE_STATE_UPDATE",
data: {
...voiceState.toPublicVoiceState(),
member: member?.toPublicMember(),
},
guild_id: voiceState.guild_id,
channel_id: voiceState.channel_id,
user_id: voiceState.user_id,
} satisfies VoiceStateUpdateEvent),
]);
//If it's null it means that we are leaving the channel and this event is not needed
if ((isNew || isChanged) && voiceState.channel_id !== null) {
const guild = await Guild.findOne({
where: { id: voiceState.guild_id },
});
const regions = Config.get().regions;
let guildRegion: Region | undefined;
const defaultRegion = regions.available.find((r) => r.id === regions.default);
if (guild && guild.region) {
// in case the configured guild region does not exist (which can
// happen when server regions config is updated after guild creation),
// fallback to default region
guildRegion = regions.available.find((r) => r.id === guild.region) ?? defaultRegion;
} else {
guildRegion = defaultRegion;
}
if (!guildRegion) {
throw new Error("Unable to find suitable region due to misconfiguration of regions");
}
await emitEvent({
event: "VOICE_SERVER_UPDATE",
data: {
token: voiceState.token,
guild_id: voiceState.guild_id,
endpoint: guildRegion.endpoint,
channel_id: voiceState.guild_id ? undefined : voiceState.channel_id, // only DM voice calls have this set, and DM channel is one where guild_id is null
},
user_id: voiceState.user_id,
} satisfies VoiceServerUpdateEvent);
}
console.log(
`[Gateway/${this.user_id}] VOICE_STATE_UPDATE for user ${this.user_id} in channel ${voiceState.channel_id} in guild ${voiceState.guild_id} in ${Date.now() - startTime}ms`,
);
}
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