Scheduling NICE CXone Campaign Time Windows via Outbound Campaign APIs with TypeScript

What You Will Build

• A TypeScript module that constructs, validates, and activates campaign time window schedules against the NICE CXone Outbound Campaign API.
• This uses the CXone Campaign Schedule REST endpoints and the OAuth2 Client Credentials flow.
• The implementation covers TypeScript with Node.js runtime, including schema validation, regulatory boundary checking, atomic updates, webhook synchronization, and audit logging.

Prerequisites

• OAuth2 Client Credentials grant with campaign:write and campaign:read scopes
• CXone API v2 (REST)
• Node.js 18+ with TypeScript 5+
• External dependencies: axios, zod, date-fns-tz, uuid, dotenv

Authentication Setup

CXone requires OAuth2 bearer tokens for all API calls. The Client Credentials flow is standard for service-to-service automation. The token endpoint is https://{environment}.my.cxone.com/api/v2/oauth/token. You must cache the token and refresh it before expiration to avoid 401 Unauthorized errors during batch scheduling operations.

import axios, { AxiosResponse } from 'axios';

export interface CxoneTokenResponse {
  access_token: string;
  expires_in: number;
  token_type: string;
  scope: string;
}

export class CxoneAuthManager {
  private token: string | null = null;
  private expiresAt: number = 0;

  constructor(
    private readonly baseUrl: string,
    private readonly clientId: string,
    private readonly clientSecret: string
  ) {}

  async getToken(): Promise<string> {
    const now = Date.now();
    if (this.token && now < this.expiresAt) {
      return this.token;
    }

    const url = `${this.baseUrl}/api/v2/oauth/token`;
    const headers = {
      'Content-Type': 'application/x-www-form-urlencoded',
      'Authorization': `Basic ${Buffer.from(`${this.clientId}:${this.clientSecret}`).toString('base64')}`
    };

    const params = new URLSearchParams({
      grant_type: 'client_credentials',
      scope: 'campaign:write campaign:read'
    });

    try {
      const response: AxiosResponse<CxoneTokenResponse> = await axios.post(url, params, { headers });
      this.token = response.data.access_token;
      this.expiresAt = now + (response.data.expires_in * 1000) - 5000; // Refresh 5s early
      return this.token;
    } catch (error) {
      if (axios.isAxiosError(error)) {
        throw new Error(`OAuth token acquisition failed: ${error.response?.status} ${error.response?.statusText}`);
      }
      throw error;
    }
  }
}

Implementation

Step 1: Schedule Payload Construction and Schema Validation

CXone campaign schedules require a structured payload containing timezone definitions, time window arrays, and business hour directives. You must validate the payload against dialer compliance constraints before transmission. The maximum window count per day is typically capped at 8 to prevent configuration failures. Zod provides strict runtime type checking and schema validation.

import { z } from 'zod';

export const TimeWindowSchema = z.object({
  dayOfWeek: z.enum(['MONDAY', 'TUESDAY', 'WEDNESDAY', 'THURSDAY', 'FRIDAY', 'SATURDAY', 'SUNDAY']),
  startTime: z.string().regex(/^([01]\d|2[0-3]):[0-5]\d:[0-5]\d$/, 'Invalid HH:MM:SS format'),
  endTime: z.string().regex(/^([01]\d|2[0-3]):[0-5]\d:[0-5]\d$/, 'Invalid HH:MM:SS format')
});

export const CampaignSchedulePayloadSchema = z.object({
  campaignId: z.string().uuid(),
  scheduleId: z.string().uuid().optional(),
  timezone: z.string().min(1, 'Timezone is required'),
  businessHoursDirective: z.enum(['STRICT', 'FLEXIBLE', 'IGNORE']),
  timeWindows: z.array(TimeWindowSchema).max(8, 'Maximum 8 time windows per schedule allowed'),
  maxConcurrentCalls: z.number().int().min(1).max(500)
});

export type TimeWindow = z.infer<typeof TimeWindowSchema>;
export type CampaignSchedulePayload = z.infer<typeof CampaignSchedulePayloadSchema>;

export function validateSchedulePayload(payload: unknown): CampaignSchedulePayload {
  try {
    return CampaignSchedulePayloadSchema.parse(payload);
  } catch (error) {
    if (error instanceof z.ZodError) {
      const messages = error.errors.map(e => `${e.path.join('.')}: ${e.message}`).join('; ');
      throw new Error(`Schema validation failed: ${messages}`);
    }
    throw error;
  }
}

Step 2: DST Adjustment Verification and Regulatory Boundary Pipeline

Regulatory compliance (TCPA, FDCPA, and local dialing laws) mandates outbound calls between 08:00 and 21:00 local recipient time. Daylight Saving Time transitions can shift timezone offsets by one hour, causing boundary violations. This pipeline verifies timezone validity, checks DST transition dates, and enforces regulatory time boundaries before payload submission.

import { toZonedTime, format, isAfter, isBefore, parseISO } from 'date-fns-tz';
import { CampaignSchedulePayload, TimeWindow } from './schema'; // Assume Step 1 is in schema.ts

export interface ValidationPipelineResult {
  valid: boolean;
  errors: string[];
}

export function runRegulatoryAndDSTValidation(payload: CampaignSchedulePayload): ValidationPipelineResult {
  const errors: string[] = [];
  const regulatoryStart = '08:00:00';
  const regulatoryEnd = '21:00:00';

  // Verify timezone exists and is valid
  try {
    new Date(`2024-01-01T12:00:00Z`).toLocaleString('en-US', { timeZone: payload.timezone });
  } catch {
    errors.push(`Invalid IANA timezone: ${payload.timezone}`);
    return { valid: false, errors };
  }

  for (const window of payload.timeWindows) {
    // Check regulatory boundaries (08:00 - 21:00 local time)
    if (window.startTime < regulatoryStart) {
      errors.push(`Window ${window.dayOfWeek} starts before regulatory limit: ${window.startTime} < ${regulatoryStart}`);
    }
    if (window.endTime > regulatoryEnd) {
      errors.push(`Window ${window.dayOfWeek} ends after regulatory limit: ${window.endTime} > ${regulatoryEnd}`);
    }

    // DST transition verification for the current month
    const now = new Date();
    const zonedNow = toZonedTime(now, payload.timezone);
    const currentOffset = zonedNow.getTimezoneOffset();
    
    // Simulate offset check for first and last day of month to detect DST shift
    const firstDay = new Date(now.getFullYear(), now.getMonth(), 1);
    const lastDay = new Date(now.getFullYear(), now.getMonth() + 1, 0);
    const offsetFirst = toZonedTime(firstDay, payload.timezone).getTimezoneOffset();
    const offsetLast = toZonedTime(lastDay, payload.timezone).getTimezoneOffset();

    if (offsetFirst !== offsetLast) {
      errors.push(`DST transition detected in ${payload.timezone} this month. Verify local call times align with recipient zones.`);
    }
  }

  return { valid: errors.length === 0, errors };
}

Step 3: Atomic PUT Activation and Conflict Detection

CXone schedule updates require atomic operations to prevent race conditions when multiple services modify the same campaign. You must include an If-Match header with the current ETag value retrieved from GET /api/v2/campaigns/{campaignId}/schedule. The API returns 409 Conflict if the ETag is stale or if overlapping windows are detected. Implement exponential backoff for 429 Too Many Requests responses.

import axios, { AxiosError } from 'axios';
import { CxoneAuthManager } from './auth'; // Assume Step 1 auth
import { CampaignSchedulePayload } from './schema';

export async function activateSchedule(
  auth: CxoneAuthManager,
  payload: CampaignSchedulePayload,
  etag: string
): Promise<{ scheduleId: string; status: string }> {
  const token = await auth.getToken();
  const url = `${auth.baseUrl}/api/v2/campaigns/${payload.campaignId}/schedule`;

  const headers = {
    'Authorization': `Bearer ${token}`,
    'Content-Type': 'application/json',
    'If-Match': etag,
    'Accept': 'application/json'
  };

  const maxRetries = 3;
  let retryCount = 0;

  while (retryCount <= maxRetries) {
    try {
      const response = await axios.put(url, payload, { headers });
      return {
        scheduleId: response.data.scheduleId,
        status: response.data.status
      };
    } catch (error) {
      if (axios.isAxiosError(error)) {
        const status = error.response?.status;
        
        if (status === 429 && retryCount < maxRetries) {
          const retryAfter = error.response?.headers['retry-after'] 
            ? parseInt(error.response.headers['retry-after'], 10) * 1000 
            : Math.pow(2, retryCount) * 1000;
          console.log(`Rate limited. Retrying in ${retryAfter}ms...`);
          await new Promise(resolve => setTimeout(resolve, retryAfter));
          retryCount++;
          continue;
        }

        if (status === 409) {
          throw new Error(`Conflict detected: ${error.response?.data?.message || 'ETag mismatch or overlapping windows'}`);
        }

        if (status === 422) {
          throw new Error(`Unprocessable Entity: ${JSON.stringify(error.response?.data)}`);
        }

        throw new Error(`HTTP ${status}: ${error.response?.statusText}`);
      }
      throw error;
    }
  }

  throw new Error('Max retries exceeded for schedule activation');
}

Step 4: Webhook Synchronization and Audit Logging

External calendar management systems require event synchronization when schedules activate. Dispatch a webhook payload containing the campaign identifier, timezone, and window boundaries. Track activation latency using performance.now() and generate immutable audit logs for regulatory compliance.

import { v4 as uuidv4 } from 'uuid';
import { CampaignSchedulePayload } from './schema';

export interface AuditLogEntry {
  id: string;
  timestamp: string;
  campaignId: string;
  action: string;
  latencyMs: number;
  success: boolean;
  errors?: string[];
}

export async function dispatchCalendarWebhook(webhookUrl: string, payload: CampaignSchedulePayload): Promise<void> {
  try {
    await axios.post(webhookUrl, {
      event: 'SCHEDULE_ACTIVATED',
      campaignId: payload.campaignId,
      timezone: payload.timezone,
      windows: payload.timeWindows,
      directive: payload.businessHoursDirective,
      timestamp: new Date().toISOString()
    }, {
      headers: { 'Content-Type': 'application/json' },
      timeout: 5000
    });
  } catch (error) {
    console.warn(`Webhook synchronization failed: ${error instanceof Error ? error.message : 'Unknown error'}`);
  }
}

export function generateAuditLog(
  payload: CampaignSchedulePayload,
  latencyMs: number,
  success: boolean,
  errors?: string[]
): AuditLogEntry {
  return {
    id: uuidv4(),
    timestamp: new Date().toISOString(),
    campaignId: payload.campaignId,
    action: 'SCHEDULE_PUT',
    latencyMs: Math.round(latencyMs * 100) / 100,
    success,
    errors
  };
}

Complete Working Example

This module combines authentication, validation, regulatory checking, atomic activation, webhook synchronization, and audit logging into a single executable workflow. Replace the environment variables with your CXone credentials.

import dotenv from 'dotenv';
dotenv.config();

import { CxoneAuthManager } from './auth';
import { validateSchedulePayload, CampaignSchedulePayload } from './schema';
import { runRegulatoryAndDSTValidation } from './validation';
import { activateSchedule } from './activation';
import { dispatchCalendarWebhook, generateAuditLog } from './audit';

async function main() {
  const ENV = {
    CXONE_ENV: process.env.CXONE_ENV || 'demo',
    CXONE_CLIENT_ID: process.env.CXONE_CLIENT_ID!,
    CXONE_CLIENT_SECRET: process.env.CXONE_CLIENT_SECRET!,
    WEBHOOK_URL: process.env.WEBHOOK_URL!,
    CAMPAIGN_ID: process.env.CAMPAIGN_ID!,
    SCHEDULE_ETAG: process.env.SCHEDULE_ETAG || 'W/"initial"'
  };

  if (!ENV.CXONE_CLIENT_ID || !ENV.CXONE_CLIENT_SECRET || !ENV.WEBHOOK_URL || !ENV.CAMPAIGN_ID) {
    throw new Error('Missing required environment variables');
  }

  const auth = new CxoneAuthManager(
    `https://${ENV.CXONE_ENV}.my.cxone.com`,
    ENV.CXONE_CLIENT_ID,
    ENV.CXONE_CLIENT_SECRET
  );

  const rawPayload = {
    campaignId: ENV.CAMPAIGN_ID,
    timezone: 'America/New_York',
    businessHoursDirective: 'STRICT',
    maxConcurrentCalls: 50,
    timeWindows: [
      { dayOfWeek: 'MONDAY', startTime: '09:00:00', endTime: '17:00:00' },
      { dayOfWeek: 'TUESDAY', startTime: '09:00:00', endTime: '17:00:00' },
      { dayOfWeek: 'WEDNESDAY', startTime: '09:00:00', endTime: '17:00:00' },
      { dayOfWeek: 'THURSDAY', startTime: '09:00:00', endTime: '17:00:00' },
      { dayOfWeek: 'FRIDAY', startTime: '09:00:00', endTime: '16:00:00' }
    ]
  };

  console.log('Step 1: Validating schema...');
  const validatedPayload: CampaignSchedulePayload = validateSchedulePayload(rawPayload);

  console.log('Step 2: Running regulatory and DST verification pipeline...');
  const validation = runRegulatoryAndDSTValidation(validatedPayload);
  if (!validation.valid) {
    console.error('Validation failed:', validation.errors);
    const auditLog = generateAuditLog(validatedPayload, 0, false, validation.errors);
    console.log('Audit Log:', JSON.stringify(auditLog, null, 2));
    process.exit(1);
  }

  const startTime = performance.now();
  let success = false;
  let errors: string[] | undefined;

  try {
    console.log('Step 3: Activating schedule via atomic PUT...');
    const result = await activateSchedule(auth, validatedPayload, ENV.SCHEDULE_ETAG);
    console.log('Activation successful:', result);

    console.log('Step 4: Synchronizing with external calendar system...');
    await dispatchCalendarWebhook(ENV.WEBHOOK_URL, validatedPayload);

    success = true;
  } catch (error) {
    errors = error instanceof Error ? [error.message] : ['Unknown failure'];
    console.error('Activation failed:', errors);
  }

  const endTime = performance.now();
  const latencyMs = endTime - startTime;

  const auditLog = generateAuditLog(validatedPayload, latencyMs, success, errors);
  console.log('Final Audit Log:', JSON.stringify(auditLog, null, 2));
}

main().catch(err => {
  console.error('Fatal execution error:', err);
  process.exit(1);
});

Common Errors and Debugging

Error: 401 Unauthorized

• What causes it: The OAuth token expired during the request lifecycle, or the client_credentials flow returned an invalid token due to incorrect credentials.
• How to fix it: Ensure the CxoneAuthManager caches tokens and refreshes them before the expires_in window closes. Verify that client_id and client_secret match the CXone integration configuration.
• Code showing the fix: The getToken() method subtracts 5000ms from the expiration timestamp to trigger early refresh. Confirm your environment variables are loaded before initialization.

Error: 409 Conflict

• What causes it: The If-Match header contains a stale ETag, or the submitted time windows overlap with existing active windows on the campaign.
• How to fix it: Fetch the current schedule using GET /api/v2/campaigns/{campaignId}/schedule to retrieve the latest ETag and existing windows. Update your payload to avoid overlapping start/end times.
• Code showing the fix:

// Fetch current ETag before PUT
const current = await axios.get(`${baseUrl}/api/v2/campaigns/${campaignId}/schedule`, {
  headers: { Authorization: `Bearer ${token}` }
});
const freshEtag = current.headers['etag'];
// Pass freshEtag to activateSchedule()

Error: 422 Unprocessable Entity

• What causes it: The payload violates CXone schema constraints, such as invalid timezone strings, time formats outside HH:MM:SS, or business hour directive mismatches.
• How to fix it: Run the Zod schema validation locally before transmission. Ensure IANA timezone identifiers are used (e.g., America/Chicago instead of CST).
• Code showing the fix: The validateSchedulePayload() function catches ZodError and prints exact field paths. Address the reported fields before retrying.

Error: 429 Too Many Requests

• What causes it: The CXone API enforces rate limits per tenant or per OAuth client. Batch scheduling operations can trigger throttling.
• How to fix it: Implement exponential backoff with jitter. Respect the Retry-After header when present.
• Code showing the fix: The activateSchedule() function includes a retry loop that parses Retry-After or applies 2^retryCount * 1000ms delays.

Official References

• NICE CXone Campaign Schedule API Documentation
• NICE CXone OAuth2 Authentication Guide
• Zod Runtime Type Checking
• date-fns-tz Timezone Utilities
• TCPA Outbound Calling Time Regulations