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import { Inject, Injectable, OnModuleInit } from '@nestjs/common';
import { Cron, CronExpression } from '@nestjs/schedule';
import { BOT_CONNECTION } from '@baneverywhere/namespaces';
import { ClientProxy } from '@nestjs/microservices';
import { BotPatterns } from '@baneverywhere/bot-interfaces';
import { v4 as uuidv4 } from 'uuid';
import { logError } from '@baneverywhere/error-handler';
import { TwitchClientService } from '@baneverywhere/twitch-client';
import { ConfigService } from '@nestjs/config';
import { InjectQueue } from '@nestjs/bull';
import { Queue } from 'bull';
import { lastValueFrom } from 'rxjs';
@Injectable()
export class AppService implements OnModuleInit {
private MAX_USERS_PER_BOT: number;
constructor(
public readonly dbService: BotDatabaseService,
@Inject(BOT_CONNECTION) public botClient: ClientProxy,
public readonly twitchClientService: TwitchClientService,
public readonly configService: ConfigService,
@InjectQueue('queue') private readonly queue: Queue,
) {
this.MAX_USERS_PER_BOT = parseInt(
this.configService.get<string>('MAX_USERS_PER_BOT', '1000')
);
}
onModuleInit() {
this.checkIfUserIsOnline();
}
@Cron(CronExpression.EVERY_MINUTE)
@logError()
async checkOnline() {
this.checkIfUserIsOnline();
}
@Cron(CronExpression.EVERY_MINUTE)
@logError()
synchronizeBotStatus() {
this.botClient.emit<void, unknown>(BotPatterns.BOT_GET_STATUS, uuidv4());
}
@Cron(CronExpression.EVERY_MINUTE)
@logError()
async removeMachinesInLimbo() {
const machines = await this.dbService.machine.findMany({
where: {
lastSeen: {
lt: new Date(Date.now() - 1000 * 120),
},
},
select: {
uuid: true,
},
});
await this.dbService.user.updateMany({
where: {
machineUUID: {
in: machines.map((m) => m.uuid),
},
},
data: {
machineUUID: null,
},
});
await this.dbService.machine.deleteMany({
where: {
uuid: {
in: machines.map((m) => m.uuid),
},
},
});
}
@logError()
async preassignMachineToUser(username: string): Promise<string> {
const machinesWithCount = await this.dbService.machine.findMany({
select: {
uuid: true,
_count: {
select: {
users: true,
},
},
},
orderBy: {
users: {
_count: 'asc',
},
},
take: 1,
});
const machine = machinesWithCount.find(
(m) => m._count.users < this.MAX_USERS_PER_BOT
);
Iif (!machine) throw new Error('No machine available');
await this.dbService.user.update({
where: {
login: username,
},
data: {
machineUUID: machine.uuid,
},
});
return machine.uuid;
}
@logError()
async checkIfUserIsOnline(cursor?: number) {
const users = await this.dbService.user.findMany({
select: {
id: true,
login: true,
machineUUID: true,
},
take: 20,
skip: cursor ? 1 : 0,
...(cursor ? { cursor: { id: cursor } } : {}),
});
Iif (users.length === 0) return;
const {
data: { data: channels },
} = await this.twitchClientService.checkUsersStatus(
users.map((u) => u.login)
);
const usernames = channels.map((channel) => channel.user_login);
const online = users.filter((user) => usernames.includes(user.login));
const offline = users.filter((user) => !usernames.includes(user.login));
await this.dbService.user.updateMany({
where: {
login: {
in: offline.map((u) => u.login),
},
},
data: {
machineUUID: null,
},
});
await Promise.all(
offline.map(async (u) => {
this.botClient.emit(BotPatterns.USER_OFFLINE, {
channelName: u.login,
botId: u.machineUUID,
});
})
);
await Promise.all(
online.map(async (user) => {
Iif (user.machineUUID) return;
const machineID = await this.preassignMachineToUser(user.login);
await lastValueFrom(this.botClient.send(BotPatterns.USER_ONLINE, {
channelName: user.login,
botId: machineID,
}));
this.queue.add('queue', { username: user.login });
})
);
Iif (users.length === 20) {
await this.checkIfUserIsOnline(users[19].id);
}
}
}
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