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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 { Channel, Member, Stream, StreamSession, VoiceState } from "@spacebar/database";
import { genVoiceToken, Payload, WebSocket, generateStreamKey } from "@spacebar/gateway";
import { Config, emitEvent, Snowflake, StreamCreateEvent, StreamServerUpdateEvent, VoiceStateUpdateEvent } from "@spacebar/util";
import { check } from "./instanceOf";
import { StreamCreateSchema } from "@spacebar/schemas";
export async function onStreamCreate(this: WebSocket, data: Payload) {
const startTime = Date.now();
check.call(this, StreamCreateSchema, data.d);
const body = data.d as StreamCreateSchema;
if (body.channel_id.trim().length === 0) return;
// first check if we are in a voice channel already. cannot create a stream if there's no existing voice connection
const voiceState = await VoiceState.findOne({
where: { user_id: this.user_id },
});
if (!voiceState || !voiceState.channel_id) return;
if (body.guild_id) {
voiceState.member = await Member.findOneOrFail({
where: { id: voiceState.user_id, guild_id: voiceState.guild_id },
relations: { user: true, roles: true },
});
}
// TODO: permissions check - if it's a guild, check if user is allowed to create stream in this guild
const channel = await Channel.findOne({
where: { id: body.channel_id },
});
if (!channel || (body.type === "guild" && channel.guild_id != body.guild_id)) return this.rawSocket.close(4000, "invalid channel");
// TODO: actually apply preferred_region from the event payload
const regions = Config.get().regions;
const guildRegion = regions.available.find((r) => r.id === regions.default);
if (!guildRegion) {
throw new Error("No default region configured");
}
// first make sure theres no other streams for this user that somehow didnt get cleared
await Stream.delete({
owner_id: this.user_id,
});
// create a new entry in db containing the token for authenticating user in stream gateway IDENTIFY
const stream = Stream.create({
id: Snowflake.generate(),
owner_id: this.user_id,
channel_id: body.channel_id,
endpoint: guildRegion.endpoint,
});
await stream.save();
const token = genVoiceToken();
const streamSession = StreamSession.create({
stream_id: stream.id,
user_id: this.user_id,
session_id: this.session_id,
token,
});
await streamSession.save();
const streamKey = generateStreamKey(body.type, body.guild_id, body.channel_id, this.user_id);
await emitEvent({
event: "STREAM_CREATE",
data: {
stream_key: streamKey,
rtc_server_id: stream.id, // for voice connections in guilds it is guild_id, for dm voice calls it seems to be DM channel id, for GoLive streams a generated number
viewer_ids: [],
region: guildRegion.name,
paused: false,
},
user_id: this.user_id,
} satisfies StreamCreateEvent);
await emitEvent({
event: "STREAM_SERVER_UPDATE",
data: {
token: streamSession.token,
stream_key: streamKey,
guild_id: null, // not sure why its always null
endpoint: stream.endpoint,
},
user_id: this.user_id,
} satisfies StreamServerUpdateEvent);
voiceState.self_stream = true;
await voiceState.save();
await emitEvent({
event: "VOICE_STATE_UPDATE",
data: {
...voiceState.toPublicVoiceState(),
member: voiceState.member.toPublicMember(),
},
guild_id: voiceState.guild_id,
channel_id: voiceState.channel_id,
} satisfies VoiceStateUpdateEvent);
console.log(`[Gateway/${this.user_id}] STREAM_CREATE for user ${this.user_id} in channel ${body.channel_id} with stream key ${streamKey} in ${Date.now() - startTime}ms`);
}
//stream key:
// guild:${guild_id}:${channel_id}:${user_id}
// call:${channel_id}:${user_id}
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