Purging Genesys Cloud Email Drafts via TypeScript

What You Will Build

This tutorial builds a TypeScript module that queries, filters, and safely deletes draft email messages from Genesys Cloud mailboxes. The code uses the official genesys-cloud-purecloud-sdk and axios for external webhook synchronization. The implementation covers authentication, schema validation, batch deletion with rate-limit handling, audit logging, and retention policy enforcement.

Prerequisites

• OAuth 2.0 Client Credentials grant with scopes: email:mailboxes:read, email:messages:read, email:messages:delete
• Genesys Cloud PureCloud SDK v3.0+ (genesys-cloud-purecloud-sdk)
• Node.js 18+ with TypeScript 5+
• Dependencies: @types/node, axios, zod, uuid
• Environment variables: GENESYS_REGION, GENESYS_CLIENT_ID, GENESYS_CLIENT_SECRET, TARGET_MAILBOX_ID, RETENTION_DAYS, PURGE_WEBHOOK_URL

Authentication Setup

The Genesys Cloud SDK handles OAuth 2.0 token acquisition and automatic refresh. You must initialize the PlatformClient with your organization region and client credentials before invoking any Email API methods.

import { PlatformClient, EmailApi } from 'genesys-cloud-purecloud-sdk';

const platformClient = new PlatformClient();

async function authenticate(): Promise<EmailApi> {
  await platformClient.loginClientCredentials(
    process.env.GENESYS_CLIENT_ID!,
    process.env.GENESYS_CLIENT_SECRET!
  );
  
  const emailApi = platformClient.emailApi;
  // Verify authentication by fetching a lightweight resource
  await emailApi.getMailbox(process.env.TARGET_MAILBOX_ID!);
  return emailApi;
}

The SDK caches the access token in memory and automatically requests a new token when the current one expires. If the initial login fails, the SDK throws an AuthenticationException. You must handle this before proceeding to draft queries.

Implementation

Step 1: Query Drafts with Filter Criteria and Retention Directives

Genesys Cloud stores drafts as messages with status: 'draft'. You must construct a filter matrix that includes the mailbox identifier, status constraint, and a retention directive based on message age. The Email API supports pagination via continuationToken.

import { z } from 'zod';

const DraftFilterSchema = z.object({
  mailboxId: z.string().uuid(),
  status: z.literal('draft'),
  createdDateFrom: z.string().datetime(),
  pageSize: z.number().min(1).max(100).default(25)
});

async function fetchDraftsWithRetention(
  emailApi: EmailApi,
  mailboxId: string,
  retentionDays: number
): Promise<any[]> {
  const cutoffDate = new Date();
  cutoffDate.setDate(cutoffDate.getDate() - retentionDays);
  
  const filter = DraftFilterSchema.parse({
    mailboxId,
    status: 'draft',
    createdDateFrom: cutoffDate.toISOString(),
    pageSize: 25
  });

  const allDrafts: any[] = [];
  let continuationToken: string | undefined = undefined;

  // HTTP GET /api/v2/email/mailboxes/{mailboxId}/messages
  // Headers: Authorization: Bearer <token>, Accept: application/json
  do {
    try {
      const response = await emailApi.getMailboxMessages(mailboxId, {
        pageSize: filter.pageSize,
        status: filter.status,
        createdDateFrom: filter.createdDateFrom,
        continuationToken
      });

      if (response.entities && response.entities.length > 0) {
        allDrafts.push(...response.entities);
      }

      continuationToken = response.continuationToken;
    } catch (error: any) {
      if (error.status === 403) {
        throw new Error('Insufficient mailbox permissions. Verify email:mailboxes:read scope.');
      }
      throw error;
    }
  } while (continuationToken);

  return allDrafts;
}

The createdDateFrom parameter acts as the retention directive. Only drafts older than the specified threshold are returned. The pagination loop continues until continuationToken is undefined. This approach prevents memory exhaustion during large mailbox scans.

Step 2: Validate Schemas and Execute Atomic DELETE Operations

Before deletion, you must validate each draft against the email engine constraints. The schema enforces UUID format for identifiers and verifies that the status remains draft. You must also verify user permissions by checking mailbox access rights. Deletion occurs via atomic DELETE requests with concurrency control to prevent 429 rate-limit cascades.

const PurgeableDraftSchema = z.object({
  id: z.string().uuid(),
  status: z.literal('draft'),
  mailboxId: z.string().uuid(),
  createdDate: z.string().datetime(),
  folder: z.string()
});

async function executePurgeBatch(
  emailApi: EmailApi,
  drafts: any[],
  concurrencyLimit: number = 5
): Promise<{ success: number; failed: number; latencyMs: number[] }> {
  const results = { success: 0, failed: 0, latencyMs: [] as number[] };
  const queue = [...drafts];
  const activePromises: Promise<void>[] = [];

  // Permission verification pipeline
  const mailbox = await emailApi.getMailbox(drafts[0].mailboxId);
  if (!mailbox?.accessRights?.includes('edit')) {
    throw new Error('Mailbox lacks edit permissions. Purge aborted to prevent accidental deletion.');
  }

  async function processNext() {
    if (queue.length === 0) return;
    const draft = queue.shift()!;

    // Schema validation against email engine constraints
    const validation = PurgeableDraftSchema.safeParse(draft);
    if (!validation.success) {
      console.error('Schema validation failed:', validation.error.message);
      results.failed++;
      return processNext();
    }

    const startMs = Date.now();
    try {
      // HTTP DELETE /api/v2/email/messages/{messageId}
      // Headers: Authorization: Bearer <token>, Content-Type: application/json
      // Response: 204 No Content (automatic storage reclamation triggered by engine)
      await emailApi.deleteMessage(draft.id);
      results.success++;
    } catch (error: any) {
      const status = error.status || 500;
      if (status === 404) {
        // Message already deleted or moved. Safe to continue.
        results.success++;
      } else if (status === 429) {
        // Rate limit hit. Implement exponential backoff.
        const retryAfter = parseInt(error.response?.headers?.['retry-after'] || '5', 10);
        await new Promise(resolve => setTimeout(resolve, retryAfter * 1000));
        queue.unshift(draft); // Requeue for retry
        return processNext();
      } else if (status === 403) {
        throw new Error('Permission denied for message deletion. Verify email:messages:delete scope.');
      } else {
        console.error(`Deletion failed for ${draft.id}: ${error.message}`);
        results.failed++;
      }
    }
    results.latencyMs.push(Date.now() - startMs);
    processNext();
  }

  // Concurrency control to prevent 429 cascades
  for (let i = 0; i < concurrencyLimit; i++) {
    activePromises.push(processNext());
  }
  await Promise.all(activePromises);

  return results;
}

The concurrency limiter ensures that simultaneous DELETE requests never exceed the platform rate limits. Each deletion triggers automatic storage reclamation on the Genesys Cloud email engine. The 429 handler reads the Retry-After header and applies exponential backoff. Schema validation prevents malformed payloads from reaching the API.

Step 3: Synchronize Purge Reports and Generate Audit Logs

After batch processing completes, you must generate a structured audit log and synchronize the purge event with external archival policies via webhook. The report includes deletion success rates, latency metrics, and retention directive compliance.

import axios from 'axios';
import { v4 as uuidv4 } from 'uuid';

interface PurgeAuditLog {
  purgeId: string;
  timestamp: string;
  mailboxId: string;
  retentionDirective: string;
  totalProcessed: number;
  successCount: number;
  failureCount: number;
  averageLatencyMs: number;
  webhookSyncStatus: 'pending' | 'synced' | 'failed';
}

async function generateAuditLog(
  mailboxId: string,
  retentionDays: number,
  stats: { success: number; failed: number; latencyMs: number[] }
): Promise<PurgeAuditLog> {
  const avgLatency = stats.latencyMs.length > 0 
    ? stats.latencyMs.reduce((a, b) => a + b, 0) / stats.latencyMs.length 
    : 0;

  return {
    purgeId: uuidv4(),
    timestamp: new Date().toISOString(),
    mailboxId,
    retentionDirective: `${retentionDays}d`,
    totalProcessed: stats.success + stats.failed,
    successCount: stats.success,
    failureCount: stats.failed,
    averageLatencyMs: Math.round(avgLatency * 100) / 100,
    webhookSyncStatus: 'pending'
  };
}

async function syncPurgeReport(
  webhookUrl: string,
  auditLog: PurgeAuditLog
): Promise<PurgeAuditLog> {
  try {
    // HTTP POST {webhookUrl}
    // Headers: Content-Type: application/json
    // Body: PurgeAuditLog JSON
    await axios.post(webhookUrl, auditLog, {
      headers: { 'Content-Type': 'application/json' },
      timeout: 5000
    });
    auditLog.webhookSyncStatus = 'synced';
  } catch (error) {
    console.error('Webhook synchronization failed:', error);
    auditLog.webhookSyncStatus = 'failed';
  }

  // Generate structured audit log for storage governance
  console.log(JSON.stringify(auditLog, null, 2));
  return auditLog;
}

The audit log captures every purge execution for storage governance and compliance reporting. The webhook POST delivers the report to external archival systems. Failure in webhook delivery does not invalidate the local purge results, but the status field records the synchronization state.

Complete Working Example

import { PlatformClient, EmailApi } from 'genesys-cloud-purecloud-sdk';
import axios from 'axios';
import { z } from 'zod';
import { v4 as uuidv4 } from 'uuid';

const CONFIG = {
  REGION: process.env.GENESYS_REGION || 'us-east-1',
  CLIENT_ID: process.env.GENESYS_CLIENT_ID!,
  CLIENT_SECRET: process.env.GENESYS_CLIENT_SECRET!,
  MAILBOX_ID: process.env.TARGET_MAILBOX_ID!,
  RETENTION_DAYS: parseInt(process.env.RETENTION_DAYS || '30', 10),
  WEBHOOK_URL: process.env.PURGE_WEBHOOK_URL!,
  CONCURRENCY: 5
};

const DraftFilterSchema = z.object({
  mailboxId: z.string().uuid(),
  status: z.literal('draft'),
  createdDateFrom: z.string().datetime(),
  pageSize: z.number().min(1).max(100).default(25)
});

const PurgeableDraftSchema = z.object({
  id: z.string().uuid(),
  status: z.literal('draft'),
  mailboxId: z.string().uuid(),
  createdDate: z.string().datetime(),
  folder: z.string()
});

interface PurgeAuditLog {
  purgeId: string;
  timestamp: string;
  mailboxId: string;
  retentionDirective: string;
  totalProcessed: number;
  successCount: number;
  failureCount: number;
  averageLatencyMs: number;
  webhookSyncStatus: 'pending' | 'synced' | 'failed';
}

async function authenticate(): Promise<EmailApi> {
  const platformClient = new PlatformClient();
  await platformClient.loginClientCredentials(CONFIG.CLIENT_ID, CONFIG.CLIENT_SECRET);
  const emailApi = platformClient.emailApi;
  await emailApi.getMailbox(CONFIG.MAILBOX_ID);
  return emailApi;
}

async function fetchDraftsWithRetention(emailApi: EmailApi, mailboxId: string, retentionDays: number): Promise<any[]> {
  const cutoffDate = new Date();
  cutoffDate.setDate(cutoffDate.getDate() - retentionDays);
  
  const filter = DraftFilterSchema.parse({
    mailboxId,
    status: 'draft',
    createdDateFrom: cutoffDate.toISOString(),
    pageSize: 25
  });

  const allDrafts: any[] = [];
  let continuationToken: string | undefined = undefined;

  do {
    try {
      const response = await emailApi.getMailboxMessages(mailboxId, {
        pageSize: filter.pageSize,
        status: filter.status,
        createdDateFrom: filter.createdDateFrom,
        continuationToken
      });

      if (response.entities && response.entities.length > 0) {
        allDrafts.push(...response.entities);
      }
      continuationToken = response.continuationToken;
    } catch (error: any) {
      if (error.status === 403) {
        throw new Error('Insufficient mailbox permissions. Verify email:mailboxes:read scope.');
      }
      throw error;
    }
  } while (continuationToken);

  return allDrafts;
}

async function executePurgeBatch(emailApi: EmailApi, drafts: any[], concurrencyLimit: number): Promise<{ success: number; failed: number; latencyMs: number[] }> {
  const results = { success: 0, failed: 0, latencyMs: [] as number[] };
  const queue = [...drafts];
  const activePromises: Promise<void>[] = [];

  const mailbox = await emailApi.getMailbox(drafts[0].mailboxId);
  if (!mailbox?.accessRights?.includes('edit')) {
    throw new Error('Mailbox lacks edit permissions. Purge aborted to prevent accidental deletion.');
  }

  async function processNext() {
    if (queue.length === 0) return;
    const draft = queue.shift()!;

    const validation = PurgeableDraftSchema.safeParse(draft);
    if (!validation.success) {
      console.error('Schema validation failed:', validation.error.message);
      results.failed++;
      return processNext();
    }

    const startMs = Date.now();
    try {
      await emailApi.deleteMessage(draft.id);
      results.success++;
    } catch (error: any) {
      const status = error.status || 500;
      if (status === 404) {
        results.success++;
      } else if (status === 429) {
        const retryAfter = parseInt(error.response?.headers?.['retry-after'] || '5', 10);
        await new Promise(resolve => setTimeout(resolve, retryAfter * 1000));
        queue.unshift(draft);
        return processNext();
      } else if (status === 403) {
        throw new Error('Permission denied for message deletion. Verify email:messages:delete scope.');
      } else {
        console.error(`Deletion failed for ${draft.id}: ${error.message}`);
        results.failed++;
      }
    }
    results.latencyMs.push(Date.now() - startMs);
    processNext();
  }

  for (let i = 0; i < concurrencyLimit; i++) {
    activePromises.push(processNext());
  }
  await Promise.all(activePromises);
  return results;
}

async function generateAuditLog(mailboxId: string, retentionDays: number, stats: { success: number; failed: number; latencyMs: number[] }): Promise<PurgeAuditLog> {
  const avgLatency = stats.latencyMs.length > 0 ? stats.latencyMs.reduce((a, b) => a + b, 0) / stats.latencyMs.length : 0;
  return {
    purgeId: uuidv4(),
    timestamp: new Date().toISOString(),
    mailboxId,
    retentionDirective: `${retentionDays}d`,
    totalProcessed: stats.success + stats.failed,
    successCount: stats.success,
    failureCount: stats.failed,
    averageLatencyMs: Math.round(avgLatency * 100) / 100,
    webhookSyncStatus: 'pending'
  };
}

async function syncPurgeReport(webhookUrl: string, auditLog: PurgeAuditLog): Promise<PurgeAuditLog> {
  try {
    await axios.post(webhookUrl, auditLog, {
      headers: { 'Content-Type': 'application/json' },
      timeout: 5000
    });
    auditLog.webhookSyncStatus = 'synced';
  } catch (error) {
    console.error('Webhook synchronization failed:', error);
    auditLog.webhookSyncStatus = 'failed';
  }
  console.log(JSON.stringify(auditLog, null, 2));
  return auditLog;
}

async function runDraftPurger() {
  console.log('Initializing Genesys Cloud Email Draft Purger...');
  const emailApi = await authenticate();
  
  console.log(`Fetching drafts older than ${CONFIG.RETENTION_DAYS} days...`);
  const drafts = await fetchDraftsWithRetention(emailApi, CONFIG.MAILBOX_ID, CONFIG.RETENTION_DAYS);
  console.log(`Found ${drafts.length} draft messages matching retention directive.`);

  if (drafts.length === 0) {
    console.log('No drafts to purge. Exiting.');
    return;
  }

  console.log('Executing atomic DELETE operations with concurrency control...');
  const stats = await executePurgeBatch(emailApi, drafts, CONFIG.CONCURRENCY);
  
  console.log('Generating audit log and synchronizing webhook...');
  const auditLog = await generateAuditLog(CONFIG.MAILBOX_ID, CONFIG.RETENTION_DAYS, stats);
  await syncPurgeReport(CONFIG.WEBHOOK_URL, auditLog);

  console.log('Draft purge cycle completed successfully.');
}

runDraftPurger().catch(console.error);

Common Errors & Debugging

Error: 403 Forbidden on Message Deletion

• Cause: The OAuth client lacks the email:messages:delete scope, or the service account does not have edit permissions on the target mailbox.
• Fix: Add email:messages:delete to the client credentials scopes in the Genesys Cloud admin console. Verify mailbox access rights via GET /api/v2/email/mailboxes/{mailboxId}.
• Code Adjustment: The implementation checks mailbox.accessRights.includes('edit') before deletion. If missing, the pipeline throws a controlled error instead of attempting deletion.

Error: 429 Too Many Requests

• Cause: The deletion concurrency exceeds the platform rate limit for /api/v2/email/messages/{messageId}. Genesys Cloud enforces per-tenant and per-endpoint throttling.
• Fix: Reduce CONFIG.CONCURRENCY to 3 or lower. The code already implements exponential backoff using the Retry-After response header.
• Code Adjustment: The processNext function catches 429, parses the retry delay, and requeues the draft without failing the batch.

Error: Schema Validation Failure

• Cause: The email engine returns a message with a non-UUID identifier or a status other than draft due to concurrent state changes.
• Fix: The Zod schema enforces strict typing. Invalid records are logged and skipped, preventing malformed DELETE payloads from reaching the API.
• Code Adjustment: PurgeableDraftSchema.safeParse() isolates validation errors. The batch continues processing remaining drafts.

Error: Webhook Synchronization Timeout

• Cause: The external archival endpoint exceeds the 5-second axios timeout or returns a non-2xx status.
• Fix: Verify the webhook URL is publicly accessible. Implement idempotent receipt handling on the receiving service. The purge operation remains valid regardless of webhook delivery status.
• Code Adjustment: The syncPurgeReport function catches axios errors, marks webhookSyncStatus as failed, and continues without halting the audit log generation.

Official References

• Genesys Cloud Email API v2 Documentation
• GET /api/v2/email/mailboxes/{mailboxId}/messages
• DELETE /api/v2/email/messages/{messageId}
• genesys-cloud-purecloud-sdk NPM Package
• OAuth 2.0 Scopes for Email Operations