From e8e0555bf84a8780803ab69b03fab6f82a13ceea Mon Sep 17 00:00:00 2001
From: Jason Irish <jirish@dynamicagency.com>
Date: Fri, 16 Dec 2016 21:14:34 -0600
Subject: [PATCH] Location onBeforeWrite

---
 code/objects/Location.php | 44 ++++++++++++++++++++++++++++++++++-----
 1 file changed, 39 insertions(+), 5 deletions(-)

diff --git a/code/objects/Location.php b/code/objects/Location.php
index 94b4bb0..640fa14 100644
--- a/code/objects/Location.php
+++ b/code/objects/Location.php
@@ -304,6 +304,34 @@ public function getCountryName() {
         return \Zend_Locale::getTranslation($this->Country, 'territory',  i18n::get_locale());
     }
 
+    /**
+     * @return bool
+     */
+    public function hasAddress() {
+        return (
+            $this->Address
+            && $this->City
+            && $this->State
+            && $this->PostalCode
+            && $this->Country
+        );
+    }
+
+    /**
+     * Returns TRUE if any of the address fields have changed.
+     *
+     * @param int $level
+     * @return bool
+     */
+    public function isAddressChanged($level = 1) {
+        $fields  = array('Address', 'City', 'State', 'PostalCode', 'Country');
+        $changed = $this->owner->getChangedFields(false, $level);
+        foreach ($fields as $field) {
+            if (array_key_exists($field, $changed)) return true;
+        }
+        return false;
+    }
+
     /**
      *
      */
@@ -311,11 +339,17 @@ public function onBeforeWrite()
     {
         parent::onBeforeWrite();
 
-        if ($address = $this->getFullAddress()) {
-            $geocoder = new GoogleGeocoder($address);
-            $response = $geocoder->getResult();
-            $this->Lat = $response->getLatitude();
-            $this->Lng = $response->getLongitude();
+        if ($this->hasAddress()) {
+            if (!$this->isAddressChanged()) {
+                return;
+            }
+
+            if ($address = $this->getFullAddress()) {
+                $geocoder = new GoogleGeocoder($address);
+                $response = $geocoder->getResult();
+                $this->Lat = $response->getLatitude();
+                $this->Lng = $response->getLongitude();
+            }
         }
     }
 }