From 50840a675f018d7b9296f99b760f5cbff6356a68 Mon Sep 17 00:00:00 2001
From: Luke <lukestevens@hotmail.com>
Date: Mon, 30 Mar 2020 12:34:35 +1100
Subject: [PATCH] Check for data changes

Check for data changes before triggering validation e.g. future date entered, then return to form after that date - only trigger validation if data on the form have changed.
---
 DateValidationActionTags.php | 4 +++-
 README.md                    | 1 +
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/DateValidationActionTags.php b/DateValidationActionTags.php
index 75e27f4..8ec6258 100644
--- a/DateValidationActionTags.php
+++ b/DateValidationActionTags.php
@@ -106,7 +106,9 @@ protected function includeJS($taggedFields) {
               default: var min = '', max = '';
             }
             //console.log('min='+min+' max='+max);
-            redcap_validate(ob, min, max, 'soft_typed', format, 1);
+            if (dataEntryFormValuesChanged) {
+                redcap_validate(ob, min, max, 'soft_typed', format, 1);
+            }
         };
         
         var taggedFields = JSON.parse('<?php echo json_encode($taggedFields); ?>');
diff --git a/README.md b/README.md
index b93c3e2..244d591 100644
--- a/README.md
+++ b/README.md
@@ -21,6 +21,7 @@ Action tags to validate date and datetime field entries:
 - If more than one of these tags is applied to a field only the first will be used.
 - You may still specify min/max literal values. The action tag check is applied after the range check.
 - The action tag validation check is a soft check similar to existing range checks (i.e. a warning is displayed but the value is permitted).
+- @FUTURE/@NOTPAST: when you enter a future date/time and then after that time return to the form, the validation check will be triggered only after data on the form has changed.
 
 ![Validate](./datevaltags-check.png)