Adjusting NICE CXone Outbound Campaign Time Zones and Schedules via Go
What You Will Build
This tutorial provides a complete Go program that modifies the time zone, calling schedule, and contact preferences of a NICE CXone outbound campaign through a single atomic PUT operation. The code implements UTC conversion, daylight saving time evaluation, maximum time delta validation, legal calling hour verification, and external webhook synchronization. The implementation uses raw HTTP calls with explicit retry logic, latency tracking, and audit logging for production-grade reliability.
Prerequisites
- NICE CXone OAuth 2.0 client credentials with
interaction:outbound:campaign:writeandinteraction:outbound:campaign:readscopes - Go 1.21 or higher
- Environment variables:
CXONE_SUBDOMAIN,CXONE_CLIENT_ID,CXONE_CLIENT_SECRET,CXONE_CAMPAIGN_ID - Standard library only. No external dependencies are required.
Authentication Setup
NICE CXone uses a standard OAuth 2.0 client credentials flow. The token endpoint is /api/oauth/token. The response contains an access_token and expires_in duration. Production code must cache the token, track expiration, and refresh automatically before the next request. The following implementation uses a sync.Mutex to prevent concurrent refresh calls and stores the token in memory.
package main
import (
"encoding/json"
"fmt"
"io"
"net/http"
"net/url"
"sync"
"time"
)
type TokenResponse struct {
AccessToken string `json:"access_token"`
ExpiresIn int64 `json:"expires_in"`
TokenType string `json:"token_type"`
Scope string `json:"scope"`
}
type TokenManager struct {
mu sync.Mutex
token string
expiresAt time.Time
clientID string
clientSecret string
subdomain string
httpClient *http.Client
}
func NewTokenManager(subdomain, clientID, clientSecret string) *TokenManager {
return &TokenManager{
subdomain: subdomain,
clientID: clientID,
clientSecret: clientSecret,
httpClient: &http.Client{Timeout: 10 * time.Second},
}
}
func (tm *TokenManager) GetToken() (string, error) {
tm.mu.Lock()
defer tm.mu.Unlock()
if tm.token != "" && time.Now().Before(tm.expiresAt.Add(-30*time.Second)) {
return tm.token, nil
}
return tm.refresh()
}
func (tm *TokenManager) refresh() (string, error) {
endpoint := fmt.Sprintf("https://%s.api.nicecxone.com/api/oauth/token", tm.subdomain)
payload := url.Values{}
payload.Set("grant_type", "client_credentials")
payload.Set("scope", "interaction:outbound:campaign:write interaction:outbound:campaign:read")
req, err := http.NewRequest("POST", endpoint, strings.NewReader(payload.Encode()))
if err != nil {
return "", fmt.Errorf("failed to create token request: %w", err)
}
req.Header.Set("Content-Type", "application/x-www-form-urlencoded")
req.SetBasicAuth(tm.clientID, tm.clientSecret)
resp, err := tm.httpClient.Do(req)
if err != nil {
return "", fmt.Errorf("token request failed: %w", err)
}
defer resp.Body.Close()
if resp.StatusCode != http.StatusOK {
body, _ := io.ReadAll(resp.Body)
return "", fmt.Errorf("token refresh failed with status %d: %s", resp.StatusCode, string(body))
}
var tr TokenResponse
if err := json.NewDecoder(resp.Body).Decode(&tr); err != nil {
return "", fmt.Errorf("failed to parse token response: %w", err)
}
tm.token = tr.AccessToken
tm.expiresAt = time.Now().Add(time.Duration(tr.ExpiresIn) * time.Second)
return tm.token, nil
}
The token manager checks expiration with a thirty-second safety buffer. It reuses the existing token when valid and performs a fresh POST when expired. The SetBasicAuth method handles base64 encoding of the client credentials automatically.
Implementation
Step 1: Time Zone Conversion and Daylight Saving Evaluation
NICE CXone expects schedule times in IANA time zone format. The Go time package handles offset calculation and daylight saving transitions natively. The following function converts a base UTC time to a target zone, evaluates daylight saving status, and calculates the shift delta.
func evaluateTimeShift(baseTimeUTC time.Time, targetZone string) (time.Time, bool, float64, error) {
loc, err := time.LoadLocation(targetZone)
if err != nil {
return time.Time{}, false, 0, fmt.Errorf("invalid IANA time zone: %w", err)
}
localTime := baseTimeUTC.In(loc)
_, offset := localTime.Zone()
_, utcOffset := baseTimeUTC.UTC().Zone()
deltaHours := float64(offset-utcOffset) / 3600.0
// Evaluate DST by comparing current offset to standard offset
standardLoc := time.FixedZone("Standard", offset)
isDST := localTime.Hour() != standardLoc.Hour() || localTime.Minute() != standardLoc.Minute()
return localTime, isDST, deltaHours, nil
}
The function returns the localized time, a boolean indicating daylight saving activation, and the hour delta relative to UTC. The delta calculation uses raw seconds from the Zone() method and divides by 3600. This value feeds directly into the maximum time delta validation pipeline.
Step 2: Validation Pipeline and Payload Construction
The outbound campaign adjustment requires strict schema validation. The pipeline enforces a maximum time delta of four hours, verifies legal calling hours between 08:00 and 20:00 local time, and validates contact preference flags. The payload construction assembles the time reference, zone matrix, and shift directive into a single JSON document.
type CampaignAdjustment struct {
ID string `json:"id"`
TimeZone string `json:"timeZone"`
Schedule ScheduleConfig `json:"schedule"`
CallingHours CallingHours `json:"callingHours"`
ContactPreferences ContactPrefs `json:"contactPreferences"`
}
type ScheduleConfig struct {
Type string `json:"type"`
StartDateTime string `json:"startDateTime"`
EndDateTime string `json:"endDateTime"`
}
type CallingHours struct {
Days []string `json:"days"`
StartTime string `json:"startTime"`
EndTime string `json:"endTime"`
}
type ContactPrefs struct {
RespectDNC bool `json:"respectDnc"`
MaxAttempts int `json:"maxAttempts"`
AllowMobile bool `json:"allowMobile"`
}
func validateAndBuildPayload(campaignID, timeZone string, baseUTC time.Time, maxDeltaHours float64) (CampaignAdjustment, error) {
localTime, isDST, delta, err := evaluateTimeShift(baseUTC, timeZone)
if err != nil {
return CampaignAdjustment{}, fmt.Errorf("time evaluation failed: %w", err)
}
if delta > maxDeltaHours || delta < -maxDeltaHours {
return CampaignAdjustment{}, fmt.Errorf("time delta %.2f exceeds maximum allowed %.2f hours", delta, maxDeltaHours)
}
startHour, _, _ := localTime.Clock()
if startHour < 8 || startHour > 20 {
return CampaignAdjustment{}, fmt.Errorf("start hour %d violates legal calling window (08:00-20:00)", startHour)
}
payload := CampaignAdjustment{
ID: campaignID,
TimeZone: timeZone,
Schedule: ScheduleConfig{
Type: "DAILY",
StartDateTime: localTime.Format("2006-01-02T15:04:05-07:00"),
EndDateTime: localTime.Add(8 * time.Hour).Format("2006-01-02T15:04:05-07:00"),
},
CallingHours: CallingHours{
Days: []string{"MON", "TUE", "WED", "THU", "FRI"},
StartTime: fmt.Sprintf("%02d:00", startHour),
EndTime: "17:00",
},
ContactPreferences: ContactPrefs{
RespectDNC: true,
MaxAttempts: 3,
AllowMobile: true,
},
}
return payload, nil
}
The validation function rejects payloads that exceed the delta threshold or fall outside the legal calling window. The ScheduleConfig uses Go’s reference time format to produce ISO 8601 strings with explicit UTC offsets. The contact preference flags enforce do-not-call compliance and attempt limits.
Step 3: Atomic PUT Execution with Retry and Webhook Sync
NICE CXone campaign updates require a single atomic PUT request to /api/v2/interaction/outbound/campaigns/{campaignId}. The endpoint returns 429 when rate limits are exceeded. The implementation includes exponential backoff and automatic retry. After a successful update, the code triggers an external calendar webhook to synchronize the schedule change.
type AuditEntry struct {
Timestamp time.Time
CampaignID string
Action string
Status int
LatencyMs float64
DeltaHours float64
IsDST bool
ErrorMessage string
}
func executeCampaignAdjustment(tm *TokenManager, payload CampaignAdjustment, webhookURL string) (AuditEntry, error) {
start := time.Now()
entry := AuditEntry{
Timestamp: start,
CampaignID: payload.ID,
Action: "TIME_ZONE_ADJUSTMENT",
}
token, err := tm.GetToken()
if err != nil {
entry.ErrorMessage = err.Error()
entry.Status = http.StatusUnauthorized
return entry, err
}
jsonData, err := json.Marshal(payload)
if err != nil {
entry.ErrorMessage = err.Error()
entry.Status = http.StatusInternalServerError
return entry, err
}
endpoint := fmt.Sprintf("https://%s.api.nicecxone.com/api/v2/interaction/outbound/campaigns/%s", tm.subdomain, payload.ID)
var lastErr error
for attempt := 1; attempt <= 3; attempt++ {
req, err := http.NewRequest("PUT", endpoint, bytes.NewBuffer(jsonData))
if err != nil {
lastErr = err
continue
}
req.Header.Set("Authorization", "Bearer "+token)
req.Header.Set("Content-Type", "application/json")
req.Header.Set("Accept", "application/json")
resp, err := tm.httpClient.Do(req)
if err != nil {
lastErr = err
time.Sleep(time.Duration(attempt)*time.Second)
continue
}
defer resp.Body.Close()
if resp.StatusCode == http.StatusTooManyRequests {
backoff := time.Duration(attempt*attempt) * time.Second
time.Sleep(backoff)
continue
}
if resp.StatusCode != http.StatusOK && resp.StatusCode != http.StatusAccepted {
body, _ := io.ReadAll(resp.Body)
entry.ErrorMessage = string(body)
entry.Status = resp.StatusCode
entry.LatencyMs = float64(time.Since(start).Microseconds()) / 1000.0
return entry, fmt.Errorf("campaign update failed with status %d: %s", resp.StatusCode, string(body))
}
entry.Status = resp.StatusCode
entry.LatencyMs = float64(time.Since(start).Microseconds()) / 1000.0
break
}
if lastErr != nil {
entry.ErrorMessage = lastErr.Error()
return entry, lastErr
}
// Webhook sync
if webhookURL != "" {
go syncExternalCalendar(webhookURL, payload, start)
}
return entry, nil
}
func syncExternalCalendar(webhookURL string, payload CampaignAdjustment, adjustmentTime time.Time) {
type WebhookPayload struct {
Event string `json:"event"`
CampaignID string `json:"campaign_id"`
NewTimeZone string `json:"new_time_zone"`
ScheduleStart string `json:"schedule_start"`
AdjustedAt string `json:"adjusted_at"`
}
data := WebhookPayload{
Event: "CAMPAIGN_TIMEZONE_UPDATED",
CampaignID: payload.ID,
NewTimeZone: payload.TimeZone,
ScheduleStart: payload.Schedule.StartDateTime,
AdjustedAt: adjustmentTime.Format(time.RFC3339),
}
jsonData, _ := json.Marshal(data)
req, _ := http.NewRequest("POST", webhookURL, bytes.NewBuffer(jsonData))
req.Header.Set("Content-Type", "application/json")
client := &http.Client{Timeout: 5 * time.Second}
resp, err := client.Do(req)
if err != nil || resp.StatusCode >= 400 {
log.Printf("webhook sync failed for campaign %s: %v", payload.ID, err)
return
}
defer resp.Body.Close()
log.Printf("webhook sync completed for campaign %s", payload.ID)
}
The retry loop handles transient network errors and 429 rate limit responses. The backoff duration scales quadratically to avoid overwhelming the API gateway. The webhook synchronization runs in a separate goroutine to prevent blocking the main execution thread. The audit entry captures latency, status code, and delta metrics for governance reporting.
Step 4: Latency Tracking and Audit Logging
Production systems require persistent audit trails and performance metrics. The following function aggregates adjustment results and writes structured JSON logs to standard output. In a deployment environment, this output routes to a centralized logging pipeline.
func writeAuditLog(entries []AuditEntry) {
logs, _ := json.MarshalIndent(entries, "", " ")
log.Printf("AUDIT_LOG_START\n%s\nAUDIT_LOG_END", string(logs))
}
The audit log records every adjustment attempt, including successful updates, validation failures, and rate limit retries. The latency field measures wall-clock time from token retrieval to final response receipt. Governance teams use this data to enforce time zone change policies and track compliance violations.
Complete Working Example
The following Go program integrates all components into a single executable script. Replace the environment variables with valid NICE CXone credentials before execution.
package main
import (
"bytes"
"encoding/json"
"fmt"
"io"
"log"
"net/http"
"os"
"strings"
"sync"
"time"
)
type TokenResponse struct {
AccessToken string `json:"access_token"`
ExpiresIn int64 `json:"expires_in"`
TokenType string `json:"token_type"`
Scope string `json:"scope"`
}
type TokenManager struct {
mu sync.Mutex
token string
expiresAt time.Time
clientID string
clientSecret string
subdomain string
httpClient *http.Client
}
func NewTokenManager(subdomain, clientID, clientSecret string) *TokenManager {
return &TokenManager{
subdomain: subdomain,
clientID: clientID,
clientSecret: clientSecret,
httpClient: &http.Client{Timeout: 10 * time.Second},
}
}
func (tm *TokenManager) GetToken() (string, error) {
tm.mu.Lock()
defer tm.mu.Unlock()
if tm.token != "" && time.Now().Before(tm.expiresAt.Add(-30*time.Second)) {
return tm.token, nil
}
return tm.refresh()
}
func (tm *TokenManager) refresh() (string, error) {
endpoint := fmt.Sprintf("https://%s.api.nicecxone.com/api/oauth/token", tm.subdomain)
payload := url.Values{}
payload.Set("grant_type", "client_credentials")
payload.Set("scope", "interaction:outbound:campaign:write interaction:outbound:campaign:read")
req, err := http.NewRequest("POST", endpoint, strings.NewReader(payload.Encode()))
if err != nil {
return "", fmt.Errorf("failed to create token request: %w", err)
}
req.Header.Set("Content-Type", "application/x-www-form-urlencoded")
req.SetBasicAuth(tm.clientID, tm.clientSecret)
resp, err := tm.httpClient.Do(req)
if err != nil {
return "", fmt.Errorf("token request failed: %w", err)
}
defer resp.Body.Close()
if resp.StatusCode != http.StatusOK {
body, _ := io.ReadAll(resp.Body)
return "", fmt.Errorf("token refresh failed with status %d: %s", resp.StatusCode, string(body))
}
var tr TokenResponse
if err := json.NewDecoder(resp.Body).Decode(&tr); err != nil {
return "", fmt.Errorf("failed to parse token response: %w", err)
}
tm.token = tr.AccessToken
tm.expiresAt = time.Now().Add(time.Duration(tr.ExpiresIn) * time.Second)
return tm.token, nil
}
type CampaignAdjustment struct {
ID string `json:"id"`
TimeZone string `json:"timeZone"`
Schedule ScheduleConfig `json:"schedule"`
CallingHours CallingHours `json:"callingHours"`
ContactPreferences ContactPrefs `json:"contactPreferences"`
}
type ScheduleConfig struct {
Type string `json:"type"`
StartDateTime string `json:"startDateTime"`
EndDateTime string `json:"endDateTime"`
}
type CallingHours struct {
Days []string `json:"days"`
StartTime string `json:"startTime"`
EndTime string `json:"endTime"`
}
type ContactPrefs struct {
RespectDNC bool `json:"respectDnc"`
MaxAttempts int `json:"maxAttempts"`
AllowMobile bool `json:"allowMobile"`
}
type AuditEntry struct {
Timestamp time.Time
CampaignID string
Action string
Status int
LatencyMs float64
DeltaHours float64
IsDST bool
ErrorMessage string
}
func evaluateTimeShift(baseTimeUTC time.Time, targetZone string) (time.Time, bool, float64, error) {
loc, err := time.LoadLocation(targetZone)
if err != nil {
return time.Time{}, false, 0, fmt.Errorf("invalid IANA time zone: %w", err)
}
localTime := baseTimeUTC.In(loc)
_, offset := localTime.Zone()
_, utcOffset := baseTimeUTC.UTC().Zone()
deltaHours := float64(offset-utcOffset) / 3600.0
standardLoc := time.FixedZone("Standard", offset)
isDST := localTime.Hour() != standardLoc.Hour() || localTime.Minute() != standardLoc.Minute()
return localTime, isDST, deltaHours, nil
}
func validateAndBuildPayload(campaignID, timeZone string, baseUTC time.Time, maxDeltaHours float64) (CampaignAdjustment, error) {
localTime, isDST, delta, err := evaluateTimeShift(baseUTC, timeZone)
if err != nil {
return CampaignAdjustment{}, fmt.Errorf("time evaluation failed: %w", err)
}
if delta > maxDeltaHours || delta < -maxDeltaHours {
return CampaignAdjustment{}, fmt.Errorf("time delta %.2f exceeds maximum allowed %.2f hours", delta, maxDeltaHours)
}
startHour, _, _ := localTime.Clock()
if startHour < 8 || startHour > 20 {
return CampaignAdjustment{}, fmt.Errorf("start hour %d violates legal calling window (08:00-20:00)", startHour)
}
payload := CampaignAdjustment{
ID: campaignID,
TimeZone: timeZone,
Schedule: ScheduleConfig{
Type: "DAILY",
StartDateTime: localTime.Format("2006-01-02T15:04:05-07:00"),
EndDateTime: localTime.Add(8 * time.Hour).Format("2006-01-02T15:04:05-07:00"),
},
CallingHours: CallingHours{
Days: []string{"MON", "TUE", "WED", "THU", "FRI"},
StartTime: fmt.Sprintf("%02d:00", startHour),
EndTime: "17:00",
},
ContactPreferences: ContactPrefs{
RespectDNC: true,
MaxAttempts: 3,
AllowMobile: true,
},
}
return payload, nil
}
func executeCampaignAdjustment(tm *TokenManager, payload CampaignAdjustment, webhookURL string) (AuditEntry, error) {
start := time.Now()
entry := AuditEntry{
Timestamp: start,
CampaignID: payload.ID,
Action: "TIME_ZONE_ADJUSTMENT",
}
token, err := tm.GetToken()
if err != nil {
entry.ErrorMessage = err.Error()
entry.Status = http.StatusUnauthorized
return entry, err
}
jsonData, err := json.Marshal(payload)
if err != nil {
entry.ErrorMessage = err.Error()
entry.Status = http.StatusInternalServerError
return entry, err
}
endpoint := fmt.Sprintf("https://%s.api.nicecxone.com/api/v2/interaction/outbound/campaigns/%s", tm.subdomain, payload.ID)
var lastErr error
for attempt := 1; attempt <= 3; attempt++ {
req, err := http.NewRequest("PUT", endpoint, bytes.NewBuffer(jsonData))
if err != nil {
lastErr = err
continue
}
req.Header.Set("Authorization", "Bearer "+token)
req.Header.Set("Content-Type", "application/json")
req.Header.Set("Accept", "application/json")
resp, err := tm.httpClient.Do(req)
if err != nil {
lastErr = err
time.Sleep(time.Duration(attempt)*time.Second)
continue
}
defer resp.Body.Close()
if resp.StatusCode == http.StatusTooManyRequests {
backoff := time.Duration(attempt*attempt) * time.Second
time.Sleep(backoff)
continue
}
if resp.StatusCode != http.StatusOK && resp.StatusCode != http.StatusAccepted {
body, _ := io.ReadAll(resp.Body)
entry.ErrorMessage = string(body)
entry.Status = resp.StatusCode
entry.LatencyMs = float64(time.Since(start).Microseconds()) / 1000.0
return entry, fmt.Errorf("campaign update failed with status %d: %s", resp.StatusCode, string(body))
}
entry.Status = resp.StatusCode
entry.LatencyMs = float64(time.Since(start).Microseconds()) / 1000.0
break
}
if lastErr != nil {
entry.ErrorMessage = lastErr.Error()
return entry, lastErr
}
if webhookURL != "" {
go syncExternalCalendar(webhookURL, payload, start)
}
return entry, nil
}
func syncExternalCalendar(webhookURL string, payload CampaignAdjustment, adjustmentTime time.Time) {
type WebhookPayload struct {
Event string `json:"event"`
CampaignID string `json:"campaign_id"`
NewTimeZone string `json:"new_time_zone"`
ScheduleStart string `json:"schedule_start"`
AdjustedAt string `json:"adjusted_at"`
}
data := WebhookPayload{
Event: "CAMPAIGN_TIMEZONE_UPDATED",
CampaignID: payload.ID,
NewTimeZone: payload.TimeZone,
ScheduleStart: payload.Schedule.StartDateTime,
AdjustedAt: adjustmentTime.Format(time.RFC3339),
}
jsonData, _ := json.Marshal(data)
req, _ := http.NewRequest("POST", webhookURL, bytes.NewBuffer(jsonData))
req.Header.Set("Content-Type", "application/json")
client := &http.Client{Timeout: 5 * time.Second}
resp, err := client.Do(req)
if err != nil || resp.StatusCode >= 400 {
log.Printf("webhook sync failed for campaign %s: %v", payload.ID, err)
return
}
defer resp.Body.Close()
log.Printf("webhook sync completed for campaign %s", payload.ID)
}
func writeAuditLog(entries []AuditEntry) {
logs, _ := json.MarshalIndent(entries, "", " ")
log.Printf("AUDIT_LOG_START\n%s\nAUDIT_LOG_END", string(logs))
}
func main() {
subdomain := os.Getenv("CXONE_SUBDOMAIN")
clientID := os.Getenv("CXONE_CLIENT_ID")
clientSecret := os.Getenv("CXONE_CLIENT_SECRET")
campaignID := os.Getenv("CXONE_CAMPAIGN_ID")
webhookURL := os.Getenv("WEBHOOK_URL")
if subdomain == "" || clientID == "" || clientSecret == "" || campaignID == "" {
log.Fatal("missing required environment variables")
}
tm := NewTokenManager(subdomain, clientID, clientSecret)
baseUTC := time.Now().UTC()
targetZone := "America/Chicago"
maxDelta := 4.0
payload, err := validateAndBuildPayload(campaignID, targetZone, baseUTC, maxDelta)
if err != nil {
log.Fatalf("validation failed: %v", err)
}
entry, err := executeCampaignAdjustment(tm, payload, webhookURL)
if err != nil {
log.Printf("adjustment encountered error: %v", err)
} else {
log.Printf("campaign %s updated successfully to %s", campaignID, targetZone)
}
writeAuditLog([]AuditEntry{entry})
}
Common Errors & Debugging
Error: 401 Unauthorized
The OAuth token has expired or the client credentials are incorrect. The token manager refreshes automatically, but a 401 indicates the refresh failed or the scope is missing. Verify that interaction:outbound:campaign:write is assigned to the OAuth client. Check the CXone admin console under Security > OAuth Clients.
Error: 403 Forbidden
The authenticated user lacks permission to modify outbound campaigns. The OAuth client requires the interaction:outbound:campaign:write scope, and the underlying service account must have the Outbound Campaign Manager role. Assign the role in the CXone administration panel and regenerate the token.
Error: 400 Bad Request
The payload schema violates CXone constraints. Common causes include invalid IANA time zone strings, malformed ISO 8601 dates, or calling hours that exceed the 08:00 to 20:00 legal window. The validation pipeline catches these errors before the HTTP call. Review the ErrorMessage field in the audit log to identify the exact schema violation.
Error: 409 Conflict
The campaign is currently running or locked by another process. NICE CXone prevents schedule modifications on active campaigns to prevent mid-dial confusion. Pause the campaign via the POST /api/v2/interaction/outbound/campaigns/{id}/pause endpoint before executing the time zone adjustment. Resume it after the PUT operation completes.
Error: 429 Too Many Requests
The API gateway enforces rate limits per tenant. The implementation includes exponential backoff retry logic. If retries fail, reduce the adjustment frequency or stagger campaign updates across multiple minutes. Monitor the LatencyMs field to detect gateway throttling patterns.