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import { PrismaRepository } from '@api/repository/repository.service';
import { WAMonitoringService } from '@api/services/monitor.service';
import { ConfigService, HttpServer } from '@config/env.config';
import { IntegrationSession, N8n, N8nSetting } from '@prisma/client';
import axios from 'axios';
import { BaseChatbotService } from '../../base-chatbot.service';
import { OpenaiService } from '../../openai/services/openai.service';
export class N8nService extends BaseChatbotService<N8n, N8nSetting> {
private openaiService: OpenaiService;
constructor(
waMonitor: WAMonitoringService,
prismaRepository: PrismaRepository,
configService: ConfigService,
openaiService: OpenaiService,
) {
super(waMonitor, prismaRepository, 'N8nService', configService);
this.openaiService = openaiService;
}
/**
* Return the bot type for N8n
*/
protected getBotType(): string {
return 'n8n';
}
protected async sendMessageToBot(
instance: any,
session: IntegrationSession,
settings: N8nSetting,
n8n: N8n,
remoteJid: string,
pushName: string,
content: string,
msg?: any,
) {
try {
if (!session) {
this.logger.error('Session is null in sendMessageToBot');
return;
}
const endpoint: string = n8n.webhookUrl;
const payload: any = {
chatInput: content,
sessionId: session.sessionId,
remoteJid: remoteJid,
pushName: pushName,
fromMe: msg?.key?.fromMe,
instanceName: instance.instanceName,
serverUrl: this.configService.get<HttpServer>('SERVER').URL,
apiKey: instance.token,
};
// Handle audio messages
if (this.isAudioMessage(content) && msg) {
try {
this.logger.debug(`[N8n] Downloading audio for Whisper transcription`);
const transcription = await this.openaiService.speechToText(msg, instance);
if (transcription) {
payload.chatInput = `[audio] ${transcription}`;
}
} catch (err) {
this.logger.error(`[N8n] Failed to transcribe audio: ${err}`);
}
}
const headers: Record<string, string> = {};
if (n8n.basicAuthUser && n8n.basicAuthPass) {
const auth = Buffer.from(`${n8n.basicAuthUser}:${n8n.basicAuthPass}`).toString('base64');
headers['Authorization'] = `Basic ${auth}`;
}
const response = await axios.post(endpoint, payload, { headers });
const message = response?.data?.output || response?.data?.answer;
// Use base class method instead of custom implementation
await this.sendMessageWhatsApp(instance, remoteJid, message, settings);
await this.prismaRepository.integrationSession.update({
where: {
id: session.id,
},
data: {
status: 'opened',
awaitUser: true,
},
});
} catch (error) {
this.logger.error(error.response?.data || error);
return;
}
}
}
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