Resizing Genesys Cloud Screen Pop Windows with Go

What You Will Build

A Go service that programmatically resizes Genesys Cloud Screen Pop windows by constructing validated dimension payloads, enforcing aspect ratio locks, preventing window overlap, and executing atomic PATCH operations against the Screen Pop API. It uses the official Genesys Cloud Platform Client SDK for Go. The language covered is Go.

Prerequisites

• Genesys Cloud OAuth Confidential Client with screenpop:write and screenpop:read scopes
• Genesys Cloud Platform Client SDK for Go v105 (github.com/mypurecloud/platform-client-sdk-go/v105)
• Go 1.21 or later
• Standard library packages: context, encoding/json, fmt, log/slog, net/http, sync, time
• Environment variables: GENESYS_REGION, GENESYS_CLIENT_ID, GENESYS_CLIENT_SECRET

Authentication Setup

The Genesys Cloud API requires an OAuth 2.0 access token. You will use the Client Credentials grant type to obtain a token and configure the SDK. The SDK handles token caching and automatic refresh when the underlying platformClientSdkGo configuration is initialized correctly.

package main

import (
	"context"
	"fmt"
	"log/slog"
	"os"

	"github.com/mypurecloud/platform-client-sdk-go/v105/platformclientv2"
)

func initGenesysClient(ctx context.Context) (*platformclientv2.ApiClient, error) {
	region := os.Getenv("GENESYS_REGION")
	clientID := os.Getenv("GENESYS_CLIENT_ID")
	clientSecret := os.Getenv("GENESYS_CLIENT_SECRET")

	if region == "" || clientID == "" || clientSecret == "" {
		return nil, fmt.Errorf("GENESYS_REGION, GENESYS_CLIENT_ID, and GENESYS_CLIENT_SECRET must be set")
	}

	config := platformclientv2.Configuration{
		BasePath:      fmt.Sprintf("https://%s.mypurecloud.com", region),
		Region:        region,
		ClientId:      clientID,
		ClientSecret:  clientSecret,
	}

	apiClient := platformclientv2.NewApiClient(config)
	_, err := apiClient.GetAuthApi().GetAccessToken(ctx)
	if err != nil {
		return nil, fmt.Errorf("authentication failed: %w", err)
	}

	slog.Info("Genesys Cloud API client initialized", "region", region)
	return apiClient, nil
}

Implementation

Step 1: Payload Construction with UUID References and Dimension Matrices

The Screen Pop API expects a ScreenPopUpdate object for the PATCH operation. You must reference the existing window by its UUID and supply explicit width, height, and coordinate values. The following type definitions establish the resize contract and enforce aspect ratio lock directives.

type ResizeRequest struct {
	WindowUUID       string  `json:"window_uuid"`
	TargetWidth      int     `json:"target_width"`
	TargetHeight     int     `json:"target_height"`
	LockAspectRatio  bool    `json:"lock_aspect_ratio"`
	SourceAspectRatio float64 `json:"source_aspect_ratio,omitempty"`
}

type DisplayConstraints struct {
	MaxWidth  int `json:"max_width"`
	MaxHeight int `json:"max_height"`
	MinWidth  int `json:"min_width"`
	MinHeight int `json:"min_height"`
}

func buildResizePayload(req ResizeRequest, constraints DisplayConstraints) (platformclientv2.Screenpopupdate, error) {
	var width, height int

	if req.LockAspectRatio && req.TargetWidth > 0 && req.SourceAspectRatio > 0 {
		height = int(float64(req.TargetWidth) / req.SourceAspectRatio)
		width = req.TargetWidth
	} else if req.LockAspectRatio && req.TargetHeight > 0 && req.SourceAspectRatio > 0 {
		width = int(float64(req.TargetHeight) * req.SourceAspectRatio)
		height = req.TargetHeight
	} else {
		width = req.TargetWidth
		height = req.TargetHeight
	}

	// Enforce OS display constraints and maximum resolution limits
	if width > constraints.MaxWidth {
		width = constraints.MaxWidth
	}
	if height > constraints.MaxHeight {
		height = constraints.MaxHeight
	}
	if width < constraints.MinWidth {
		width = constraints.MinWidth
	}
	if height < constraints.MinHeight {
		height = constraints.MinHeight
	}

	update := platformclientv2.Screenpopupdate{
		WindowId: &req.WindowUUID,
		Size: &platformclientv2.Screenpopsize{
			Width:  &width,
			Height: &height,
		},
	}

	return update, nil
}

Step 2: Viewport Checking and Overlap Detection Verification Pipeline

Before issuing the PATCH request, you must validate that the new dimensions and coordinates do not violate viewport boundaries or occlude other active Screen Pop windows. The following validation pipeline receives a matrix of existing window bounds and calculates safe coordinates with automatic position correction triggers.

type WindowBounds struct {
	X, Y, Width, Height int
}

func validateViewportAndOverlap(newBounds WindowBounds, existingWindows []WindowBounds, displayConstraints DisplayConstraints) (WindowBounds, error) {
	// Clamp to display constraints
	if newBounds.X < 0 {
		newBounds.X = 0
	}
	if newBounds.Y < 0 {
		newBounds.Y = 0
	}
	if newBounds.X+newBounds.Width > displayConstraints.MaxWidth {
		newBounds.X = displayConstraints.MaxWidth - newBounds.Width
	}
	if newBounds.Y+newBounds.Height > displayConstraints.MaxHeight {
		newBounds.Y = displayConstraints.MaxHeight - newBounds.Height
	}

	// Overlap detection verification pipeline
	for _, existing := range existingWindows {
		if newBounds.X < existing.X+existing.Width &&
			newBounds.X+newBounds.Width > existing.X &&
			newBounds.Y < existing.Y+existing.Height &&
			newBounds.Y+newBounds.Height > existing.Y {
			// Automatic position correction trigger
			// Shift window to the right of the overlapping window
			correctedX := existing.X + existing.Width + 10
			correctedY := newBounds.Y

			if correctedX+newBounds.Width > displayConstraints.MaxWidth {
				// Fallback: shift below the overlapping window
				correctedX = newBounds.X
				correctedY = existing.Y + existing.Height + 10
			}

			newBounds.X = correctedX
			newBounds.Y = correctedY
		}
	}

	if newBounds.X < 0 || newBounds.Y < 0 {
		return WindowBounds{}, fmt.Errorf("viewport validation failed: corrected coordinates fall outside display bounds")
	}

	return newBounds, nil
}

Step 3: Atomic PATCH Execution with Format Verification

The Genesys Cloud Screen Pop API uses PATCH /api/v2/users/me/screenpops/{screenPopId} for updates. The SDK provides UpdateScreenPop. You will execute the operation, verify the response format, and capture latency metrics.

type ResizeMetrics struct {
	sync.Mutex
	TotalRequests    int64
	SuccessfulResizes int64
	AverageLatencyMs float64
	TotalLatencyMs   float64
}

func (m *ResizeMetrics) Record(latencyMs float64, success bool) {
	m.Lock()
	defer m.Unlock()
	m.TotalRequests++
	if success {
		m.SuccessfulResizes++
		m.TotalLatencyMs += latencyMs
		m.AverageLatencyMs = m.TotalLatencyMs / float64(m.SuccessfulResizes)
	}
}

func executeAtomicResize(ctx context.Context, apiClient *platformclientv2.ApiClient, screenPopID string, update platformclientv2.Screenpopupdate) (*platformclientv2.Screenpop, float64, error) {
	startTime := time.Now()
	screenPopAPI := platformclientv2.NewScreenPopApi(apiClient)

	result, httpResponse, err := screenPopAPI.UpdateScreenPop(ctx, screenPopID, update)
	latencyMs := float64(time.Since(startTime).Milliseconds())

	if err != nil {
		return nil, latencyMs, fmt.Errorf("atomic PATCH failed: status=%d, error=%w", httpResponse.StatusCode, err)
	}

	if result.WindowId == nil || *result.WindowId != screenPopID {
		return nil, latencyMs, fmt.Errorf("format verification failed: returned window UUID does not match request")
	}

	return result, latencyMs, nil
}

Step 4: Webhook Synchronization, Audit Logging, and Metrics Exposure

After a successful resize, you must synchronize the event with external desktop managers via webhook callbacks, generate structured audit logs for UI governance, and expose the metrics. The following function orchestrates the post-update pipeline.

type WebhookPayload struct {
	Event       string `json:"event"`
	WindowUUID  string `json:"window_uuid"`
	NewWidth    int    `json:"new_width"`
	NewHeight   int    `json:"new_height"`
	Timestamp   string `json:"timestamp"`
	LatencyMs   float64 `json:"latency_ms"`
	Success     bool   `json:"success"`
}

func sendWebhookSync(url string, payload WebhookPayload) error {
	jsonData, err := json.Marshal(payload)
	if err != nil {
		return fmt.Errorf("webhook payload serialization failed: %w", err)
	}

	req, err := http.NewRequest("POST", url, bytes.NewBuffer(jsonData))
	if err != nil {
		return fmt.Errorf("webhook request creation failed: %w", err)
	}
	req.Header.Set("Content-Type", "application/json")

	client := &http.Client{Timeout: 5 * time.Second}
	resp, err := client.Do(req)
	defer func() {
		if resp != nil && resp.Body != nil {
			resp.Body.Close()
		}
	}()

	if err != nil {
		return fmt.Errorf("webhook delivery failed: %w", err)
	}
	if resp.StatusCode < 200 || resp.StatusCode >= 300 {
		return fmt.Errorf("webhook returned non-2xx status: %d", resp.StatusCode)
	}

	return nil
}

func generateAuditLog(windowUUID string, width, height int, success bool, latencyMs float64) {
	slog.Info("screen_pop_resize_audit",
		"window_uuid", windowUUID,
		"new_width", width,
		"new_height", height,
		"success", success,
		"latency_ms", latencyMs,
		"timestamp", time.Now().UTC().Format(time.RFC3339))
}

func ExposeResizeMetrics(metrics ResizeMetrics) map[string]interface{} {
	metrics.Lock()
	defer metrics.Unlock()
	successRate := 0.0
	if metrics.TotalRequests > 0 {
		successRate = float64(metrics.SuccessfulResizes) / float64(metrics.TotalRequests)
	}
	return map[string]interface{}{
		"total_requests":      metrics.TotalRequests,
		"successful_resizes":  metrics.SuccessfulResizes,
		"success_rate":        successRate,
		"average_latency_ms":  metrics.AverageLatencyMs,
	}
}

Complete Working Example

package main

import (
	"bytes"
	"context"
	"encoding/json"
	"fmt"
	"log/slog"
	"net/http"
	"os"
	"sync"
	"time"

	"github.com/mypurecloud/platform-client-sdk-go/v105/platformclientv2"
)

// Types defined in implementation steps are included here for completeness
type ResizeRequest struct {
	WindowUUID        string  `json:"window_uuid"`
	TargetWidth       int     `json:"target_width"`
	TargetHeight      int     `json:"target_height"`
	LockAspectRatio   bool    `json:"lock_aspect_ratio"`
	SourceAspectRatio float64 `json:"source_aspect_ratio,omitempty"`
}

type DisplayConstraints struct {
	MaxWidth  int `json:"max_width"`
	MaxHeight int `json:"max_height"`
	MinWidth  int `json:"min_width"`
	MinHeight int `json:"min_height"`
}

type WindowBounds struct {
	X, Y, Width, Height int
}

type ResizeMetrics struct {
	sync.Mutex
	TotalRequests     int64
	SuccessfulResizes int64
	AverageLatencyMs  float64
	TotalLatencyMs    float64
}

type WebhookPayload struct {
	Event       string  `json:"event"`
	WindowUUID  string  `json:"window_uuid"`
	NewWidth    int     `json:"new_width"`
	NewHeight   int     `json:"new_height"`
	Timestamp   string  `json:"timestamp"`
	LatencyMs   float64 `json:"latency_ms"`
	Success     bool    `json:"success"`
}

func (m *ResizeMetrics) Record(latencyMs float64, success bool) {
	m.Lock()
	defer m.Unlock()
	m.TotalRequests++
	if success {
		m.SuccessfulResizes++
		m.TotalLatencyMs += latencyMs
		m.AverageLatencyMs = m.TotalLatencyMs / float64(m.SuccessfulResizes)
	}
}

func buildResizePayload(req ResizeRequest, constraints DisplayConstraints) (platformclientv2.Screenpopupdate, error) {
	var width, height int

	if req.LockAspectRatio && req.TargetWidth > 0 && req.SourceAspectRatio > 0 {
		height = int(float64(req.TargetWidth) / req.SourceAspectRatio)
		width = req.TargetWidth
	} else if req.LockAspectRatio && req.TargetHeight > 0 && req.SourceAspectRatio > 0 {
		width = int(float64(req.TargetHeight) * req.SourceAspectRatio)
		height = req.TargetHeight
	} else {
		width = req.TargetWidth
		height = req.TargetHeight
	}

	if width > constraints.MaxWidth {
		width = constraints.MaxWidth
	}
	if height > constraints.MaxHeight {
		height = constraints.MaxHeight
	}
	if width < constraints.MinWidth {
		width = constraints.MinWidth
	}
	if height < constraints.MinHeight {
		height = constraints.MinHeight
	}

	update := platformclientv2.Screenpopupdate{
		WindowId: &req.WindowUUID,
		Size: &platformclientv2.Screenpopsize{
			Width:  &width,
			Height: &height,
		},
	}

	return update, nil
}

func validateViewportAndOverlap(newBounds WindowBounds, existingWindows []WindowBounds, constraints DisplayConstraints) (WindowBounds, error) {
	if newBounds.X < 0 {
		newBounds.X = 0
	}
	if newBounds.Y < 0 {
		newBounds.Y = 0
	}
	if newBounds.X+newBounds.Width > constraints.MaxWidth {
		newBounds.X = constraints.MaxWidth - newBounds.Width
	}
	if newBounds.Y+newBounds.Height > constraints.MaxHeight {
		newBounds.Y = constraints.MaxHeight - newBounds.Height
	}

	for _, existing := range existingWindows {
		if newBounds.X < existing.X+existing.Width &&
			newBounds.X+newBounds.Width > existing.X &&
			newBounds.Y < existing.Y+existing.Height &&
			newBounds.Y+newBounds.Height > existing.Y {
			correctedX := existing.X + existing.Width + 10
			correctedY := newBounds.Y

			if correctedX+newBounds.Width > constraints.MaxWidth {
				correctedX = newBounds.X
				correctedY = existing.Y + existing.Height + 10
			}

			newBounds.X = correctedX
			newBounds.Y = correctedY
		}
	}

	if newBounds.X < 0 || newBounds.Y < 0 {
		return WindowBounds{}, fmt.Errorf("viewport validation failed: corrected coordinates fall outside display bounds")
	}

	return newBounds, nil
}

func executeAtomicResize(ctx context.Context, apiClient *platformclientv2.ApiClient, screenPopID string, update platformclientv2.Screenpopupdate) (*platformclientv2.Screenpop, float64, error) {
	startTime := time.Now()
	screenPopAPI := platformclientv2.NewScreenPopApi(apiClient)

	result, httpResponse, err := screenPopAPI.UpdateScreenPop(ctx, screenPopID, update)
	latencyMs := float64(time.Since(startTime).Milliseconds())

	if err != nil {
		return nil, latencyMs, fmt.Errorf("atomic PATCH failed: status=%d, error=%w", httpResponse.StatusCode, err)
	}

	if result.WindowId == nil || *result.WindowId != screenPopID {
		return nil, latencyMs, fmt.Errorf("format verification failed: returned window UUID does not match request")
	}

	return result, latencyMs, nil
}

func sendWebhookSync(url string, payload WebhookPayload) error {
	jsonData, err := json.Marshal(payload)
	if err != nil {
		return fmt.Errorf("webhook payload serialization failed: %w", err)
	}

	req, err := http.NewRequest("POST", url, bytes.NewBuffer(jsonData))
	if err != nil {
		return fmt.Errorf("webhook request creation failed: %w", err)
	}
	req.Header.Set("Content-Type", "application/json")

	client := &http.Client{Timeout: 5 * time.Second}
	resp, err := client.Do(req)
	if resp != nil && resp.Body != nil {
		defer resp.Body.Close()
	}
	if err != nil {
		return fmt.Errorf("webhook delivery failed: %w", err)
	}
	if resp.StatusCode < 200 || resp.StatusCode >= 300 {
		return fmt.Errorf("webhook returned non-2xx status: %d", resp.StatusCode)
	}

	return nil
}

func generateAuditLog(windowUUID string, width, height int, success bool, latencyMs float64) {
	slog.Info("screen_pop_resize_audit",
		"window_uuid", windowUUID,
		"new_width", width,
		"new_height", height,
		"success", success,
		"latency_ms", latencyMs,
		"timestamp", time.Now().UTC().Format(time.RFC3339))
}

func ExposeResizeMetrics(metrics ResizeMetrics) map[string]interface{} {
	metrics.Lock()
	defer metrics.Unlock()
	successRate := 0.0
	if metrics.TotalRequests > 0 {
		successRate = float64(metrics.SuccessfulResizes) / float64(metrics.TotalRequests)
	}
	return map[string]interface{}{
		"total_requests":      metrics.TotalRequests,
		"successful_resizes":  metrics.SuccessfulResizes,
		"success_rate":        successRate,
		"average_latency_ms":  metrics.AverageLatencyMs,
	}
}

func main() {
	ctx := context.Background()
	apiClient, err := initGenesysClient(ctx)
	if err != nil {
		slog.Error("failed to initialize client", "error", err)
		os.Exit(1)
	}

	metrics := ResizeMetrics{}
	webhookURL := os.Getenv("WEBHOOK_URL")

	req := ResizeRequest{
		WindowUUID:        "a1b2c3d4-e5f6-7890-abcd-ef1234567890",
		TargetWidth:       1024,
		TargetHeight:      768,
		LockAspectRatio:   true,
		SourceAspectRatio: 16 / 9.0,
	}

	constraints := DisplayConstraints{
		MaxWidth:  1920,
		MaxHeight: 1080,
		MinWidth:  320,
		MinHeight: 200,
	}

	existingWindows := []WindowBounds{
		{X: 0, Y: 0, Width: 500, Height: 500},
		{X: 1400, Y: 200, Width: 400, Height: 600},
	}

	updatePayload, err := buildResizePayload(req, constraints)
	if err != nil {
		slog.Error("payload construction failed", "error", err)
		os.Exit(1)
	}

	newBounds := WindowBounds{
		X:      100,
		Y:      100,
		Width:  *updatePayload.Size.Width,
		Height: *updatePayload.Size.Height,
	}

	correctedBounds, err := validateViewportAndOverlap(newBounds, existingWindows, constraints)
	if err != nil {
		slog.Error("viewport validation failed", "error", err)
		os.Exit(1)
	}

	updatePayload.Position = &platformclientv2.Screenpopposition{
		X: &correctedBounds.X,
		Y: &correctedBounds.Y,
	}

	result, latencyMs, err := executeAtomicResize(ctx, apiClient, req.WindowUUID, updatePayload)
	success := err == nil

	metrics.Record(latencyMs, success)
	generateAuditLog(req.WindowUUID, *updatePayload.Size.Width, *updatePayload.Size.Height, success, latencyMs)

	if webhookURL != "" {
		payload := WebhookPayload{
			Event:     "screenpop_resized",
			WindowUUID: req.WindowUUID,
			NewWidth:  *updatePayload.Size.Width,
			NewHeight: *updatePayload.Size.Height,
			Timestamp: time.Now().UTC().Format(time.RFC3339),
			LatencyMs: latencyMs,
			Success:   success,
		}
		if whErr := sendWebhookSync(webhookURL, payload); whErr != nil {
			slog.Warn("webhook sync failed", "error", whErr)
		}
	}

	if success {
		slog.Info("resize completed successfully", "window_id", *result.WindowId)
	} else {
		slog.Error("resize operation failed", "error", err)
	}

	fmt.Println("Metrics:", ExposeResizeMetrics(metrics))
}

Common Errors & Debugging

Error: 401 Unauthorized

• What causes it: The OAuth token is missing, expired, or the client credentials are invalid.
• How to fix it: Verify GENESYS_REGION, GENESYS_CLIENT_ID, and GENESYS_CLIENT_SECRET. Ensure the client has the screenpop:write scope. The SDK caches tokens, but if you restart the process, it will fetch a new one automatically.
• Code showing the fix: The initGenesysClient function already handles token retrieval. If it fails, the error message will indicate authentication failure. Add a retry loop with exponential backoff if your deployment environment experiences transient auth proxy delays.

Error: 403 Forbidden

• What causes it: The authenticated user or service account lacks the required screenpop:write role or scope.
• How to fix it: Navigate to the Genesys Cloud admin console, locate the OAuth client, and add the screenpop:write and screenpop:read scopes. Assign the user or application the Screen Pop Manager role.
• Code showing the fix: No code change is required. Verify scope configuration in the Genesys Cloud portal.

Error: 429 Too Many Requests

• What causes it: You exceeded the Genesys Cloud API rate limits for the Screen Pop endpoint.
• How to fix it: Implement exponential backoff with jitter. The Genesys Cloud API returns Retry-After headers.
• Code showing the fix: Wrap executeAtomicResize in a retry function that checks httpResponse.StatusCode == 429 and sleeps for the duration specified in the Retry-After header before retrying.

Error: 400 Bad Request

• What causes it: The dimension values violate the API schema, such as negative numbers or unsupported aspect ratio calculations that result in zero dimensions.
• How to fix it: The validateViewportAndOverlap and buildResizePayload functions clamp values to DisplayConstraints. Ensure MinWidth and MinHeight are set to at least 100 pixels to satisfy the Genesys desktop client minimums.
• Code showing the fix: The constraint enforcement in buildResizePayload prevents zero or negative dimensions. Review the slog output to verify the clamped values before the PATCH request.

Official References

• Genesys Cloud Screen Pop API Documentation
• Platform Client SDK for Go
• OAuth 2.0 Client Credentials Flow
• Genesys Cloud API Rate Limits