helix-engage-server/src/exotel/exotel.service.ts

import { Injectable, Logger } from '@nestjs/common';
import type { ExotelWebhookPayload, CallEvent } from './exotel.types';

@Injectable()
export class ExotelService {
    private readonly logger = new Logger(ExotelService.name);

    parseWebhook(payload: ExotelWebhookPayload): CallEvent {
        const { event_details, call_details } = payload;

        const eventType = event_details.event_type === 'answered' ? 'answered'
            : event_details.event_type === 'terminal' ? 'ended'
            : 'ringing';

        const callEvent: CallEvent = {
            exotelCallSid: call_details.call_sid,
            eventType,
            direction: call_details.direction,
            callerPhone: call_details.customer_details?.number ?? '',
            agentName: call_details.assigned_agent_details?.name ?? 'Unknown',
            agentPhone: call_details.assigned_agent_details?.number ?? '',
            duration: call_details.total_talk_time,
            recordingUrl: call_details.recordings?.[0]?.url,
            callStatus: call_details.call_status,
            timestamp: new Date().toISOString(),
        };

        this.logger.log(`Parsed Exotel event: ${eventType} for call ${call_details.call_sid}`);
        return callEvent;
    }
}