Updated to print service power shell
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299
windows_print_service/chrome_extension/background.js
Normal file
299
windows_print_service/chrome_extension/background.js
Normal file
@@ -0,0 +1,299 @@
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/**
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* Quality Recticel Print Service - Background Script
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* Handles communication between web pages and Windows print service
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*/
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// Configuration
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const PRINT_SERVICE_URL = 'http://localhost:8765';
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const SERVICE_CHECK_INTERVAL = 30000; // 30 seconds
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// Service status
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let serviceStatus = {
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available: false,
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lastCheck: null,
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printers: []
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};
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// Initialize extension
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chrome.runtime.onInstalled.addListener(() => {
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console.log('Quality Recticel Print Service extension installed');
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checkServiceStatus();
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// Set up periodic service check
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setInterval(checkServiceStatus, SERVICE_CHECK_INTERVAL);
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});
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// Handle messages from content scripts or web pages
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chrome.runtime.onMessage.addListener((message, sender, sendResponse) => {
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console.log('Background script received message:', message);
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switch (message.action) {
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case 'print_pdf':
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handlePrintPDF(message.data).then(sendResponse);
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return true; // Keep message channel open for async response
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case 'silent_print':
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handleSilentPrint(message.data).then(sendResponse);
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return true;
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case 'get_printers':
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handleGetPrinters().then(sendResponse);
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return true;
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case 'check_service':
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checkServiceStatus().then(sendResponse);
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return true;
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default:
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sendResponse({ error: 'Unknown action', success: false });
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}
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});
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// Handle external messages from web pages
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chrome.runtime.onMessageExternal.addListener((message, sender, sendResponse) => {
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console.log('External message received:', message, 'from:', sender);
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// Verify sender origin for security
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const allowedOrigins = [
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'http://localhost:5000',
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'http://localhost:8000',
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'http://127.0.0.1:5000',
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'http://127.0.0.1:8000'
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];
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if (!allowedOrigins.includes(sender.origin)) {
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sendResponse({ error: 'Unauthorized origin', success: false });
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return;
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}
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// Handle the message
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switch (message.action) {
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case 'print_pdf':
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case 'silent_print':
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handleSilentPrint(message.data).then(sendResponse);
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return true;
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case 'get_printers':
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handleGetPrinters().then(sendResponse);
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return true;
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case 'ping':
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sendResponse({
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success: true,
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service_available: serviceStatus.available,
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extension_version: chrome.runtime.getManifest().version
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});
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break;
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default:
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sendResponse({ error: 'Unknown action', success: false });
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}
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});
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/**
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* Check if the Windows print service is available
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*/
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async function checkServiceStatus() {
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try {
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const response = await fetch(`${PRINT_SERVICE_URL}/health`, {
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method: 'GET',
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timeout: 5000
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});
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if (response.ok) {
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const data = await response.json();
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serviceStatus.available = true;
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serviceStatus.lastCheck = new Date();
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console.log('Print service is available:', data);
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// Update extension badge
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chrome.action.setBadgeText({ text: '✓' });
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chrome.action.setBadgeBackgroundColor({ color: '#28a745' });
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return { success: true, status: data };
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} else {
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throw new Error(`Service returned status ${response.status}`);
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}
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} catch (error) {
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console.warn('Print service not available:', error);
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serviceStatus.available = false;
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serviceStatus.lastCheck = new Date();
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// Update extension badge
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chrome.action.setBadgeText({ text: '✗' });
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chrome.action.setBadgeBackgroundColor({ color: '#dc3545' });
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return { success: false, error: error.message };
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}
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}
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/**
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* Handle PDF printing request
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*/
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async function handlePrintPDF(printData) {
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try {
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if (!serviceStatus.available) {
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await checkServiceStatus();
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if (!serviceStatus.available) {
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throw new Error('Print service is not available');
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}
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}
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const response = await fetch(`${PRINT_SERVICE_URL}/print/pdf`, {
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method: 'POST',
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headers: {
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'Content-Type': 'application/json'
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},
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body: JSON.stringify(printData)
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});
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const result = await response.json();
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if (response.ok) {
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console.log('Print job completed:', result);
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// Show notification
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chrome.notifications.create({
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type: 'basic',
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iconUrl: 'icons/icon48.png',
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title: 'Quality Recticel Print Service',
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message: 'PDF printed successfully'
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});
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return { success: true, result };
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} else {
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throw new Error(result.error || 'Print job failed');
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}
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} catch (error) {
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console.error('Print PDF error:', error);
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// Show error notification
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chrome.notifications.create({
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type: 'basic',
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iconUrl: 'icons/icon48.png',
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title: 'Quality Recticel Print Service',
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message: `Print failed: ${error.message}`
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});
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return { success: false, error: error.message };
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}
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}
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/**
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* Handle silent printing request
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*/
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async function handleSilentPrint(printData) {
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try {
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if (!serviceStatus.available) {
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await checkServiceStatus();
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if (!serviceStatus.available) {
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// Try direct browser printing as fallback
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return await handleDirectPrint(printData);
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}
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}
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const response = await fetch(`${PRINT_SERVICE_URL}/print/silent`, {
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method: 'POST',
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headers: {
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'Content-Type': 'application/json'
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},
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body: JSON.stringify(printData)
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});
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const result = await response.json();
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if (response.ok) {
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console.log('Silent print completed:', result);
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return { success: true, result };
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} else {
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throw new Error(result.error || 'Silent print failed');
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}
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} catch (error) {
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console.error('Silent print error:', error);
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// Fallback to direct printing
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return await handleDirectPrint(printData);
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}
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}
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/**
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* Handle direct browser printing (fallback)
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*/
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async function handleDirectPrint(printData) {
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try {
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// Create hidden iframe for printing
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const printFrame = document.createElement('iframe');
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printFrame.style.display = 'none';
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printFrame.src = printData.pdf_url || 'data:application/pdf;base64,' + printData.pdf_data;
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document.body.appendChild(printFrame);
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// Wait for load and print
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return new Promise((resolve) => {
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printFrame.onload = () => {
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setTimeout(() => {
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printFrame.contentWindow.print();
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document.body.removeChild(printFrame);
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resolve({ success: true, method: 'browser_fallback' });
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}, 1000);
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};
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});
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} catch (error) {
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console.error('Direct print error:', error);
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return { success: false, error: error.message };
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}
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}
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/**
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* Get available printers
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*/
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async function handleGetPrinters() {
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try {
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if (!serviceStatus.available) {
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await checkServiceStatus();
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if (!serviceStatus.available) {
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return {
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success: false,
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error: 'Print service not available',
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printers: []
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};
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}
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}
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const response = await fetch(`${PRINT_SERVICE_URL}/printers`, {
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method: 'GET'
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});
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const result = await response.json();
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if (response.ok) {
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serviceStatus.printers = result.printers || [];
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return { success: true, printers: result.printers };
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} else {
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throw new Error(result.error || 'Failed to get printers');
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}
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} catch (error) {
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console.error('Get printers error:', error);
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return { success: false, error: error.message, printers: [] };
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}
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}
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// Export for testing
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if (typeof module !== 'undefined' && module.exports) {
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module.exports = {
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checkServiceStatus,
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handlePrintPDF,
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handleSilentPrint,
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handleGetPrinters
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};
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}
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