Prevent Duplicate Submission

1function onSubmit() {
2  // Check if form is already being submitted
3  if (g_form.isUserSubmitting) {
4    // Already submitting, prevent duplicate
5    alert('This form is already being submitted. Please wait...');
6    return false;
7  }
8
9  // Validation checks before allowing submission
10  var validationErrors = [];
11
12  // Check mandatory fields
13  var requiredFields = [
14    {name: 'short_description', label: 'Short Description'},
15    {name: 'caller_id', label: 'Caller'}
16  ];
17
18  requiredFields.forEach(function(field) {
19    if (!g_form.getValue(field.name)) {
20      validationErrors.push(field.label + ' is required');
21    }
22  });
23
24  // If validation fails, don't proceed
25  if (validationErrors.length > 0) {
26    alert('Please correct the following errors:\n\n' + 
27          validationErrors.join('\n'));
28    return false;
29  }
30
31  // Mark form as being submitted
32  g_form.isUserSubmitting = true;
33
34  // Disable submit button and related buttons
35  // Find and disable all submit-type buttons
36  try {
37    // Get all form buttons
38    var buttons = document.querySelectorAll('button[type="submit"], ' +
39                                            'button[name="submit"], ' +
40                                            'input[type="submit"]');
41    
42    buttons.forEach(function(button) {
43      button.disabled = true;
44      button.style.opacity = '0.5';
45      button.style.cursor = 'not-allowed';
46      
47      // Store original text
48      var originalText = button.innerText || button.value;
49      button.setAttribute('data-original-text', originalText);
50      
51      // Update button text to show submission in progress
52      if (button.innerText) {
53        button.innerText = 'Submitting...';
54      } else if (button.value) {
55        button.value = 'Submitting...';
56      }
57    });
58
59    // Also try to disable ServiceNow's specific buttons
60    if (typeof gsftSubmit !== 'undefined') {
61      // Disable standard save button
62      var saveButton = gel('sysverb_insert') || gel('sysverb_update');
63      if (saveButton) {
64        saveButton.disabled = true;
65        saveButton.style.opacity = '0.5';
66      }
67    }
68  } catch (e) {
69    console.error('Error disabling buttons:', e);
70    // Continue with submission even if button disable fails
71  }
72
73  // Show loading message
74  g_form.addInfoMessage('Submitting form, please wait...');
75
76  // Set a timeout to re-enable if submission fails
77  setTimeout(function() {
78    // If we're still on the form after 30 seconds, something went wrong
79    if (g_form.isUserSubmitting) {
80      g_form.isUserSubmitting = false;
81      
82      // Re-enable buttons
83      var buttons = document.querySelectorAll('button[disabled]');
84      buttons.forEach(function(button) {
85        button.disabled = false;
86        button.style.opacity = '1';
87        button.style.cursor = 'pointer';
88        
89        // Restore original text
90        var originalText = button.getAttribute('data-original-text');
91        if (originalText) {
92          if (button.innerText) {
93            button.innerText = originalText;
94          } else if (button.value) {
95            button.value = originalText;
96          }
97        }
98      });
99      
100      g_form.clearMessages();
101      g_form.addErrorMessage('Submission timed out. Please try again.');
102    }
103  }, 30000);  // 30 second timeout
104
105  // Allow submission to proceed
106  return true;
107}