Remove Zend_Json call from js/customer-data/invalidation-rules.phtml

 - remove zend call and use the Magento Framework,
 - move work from template into app/code/Magento/Customer/Block/CustomerScopeData.php

Author: dmanners

app/code/Magento/Customer/Block/CustomerScopeData.php

@@ -50,4 +50,30 @@ public function getWebsiteId()
     {
         return (int)$this->_storeManager->getStore()->getWebsiteId();
     }
+
+    /**
+     * Get the invalidation rules json encoded
+     *
+     * @return string
+     */
+    public function getInvalidationRulesJson()
+    {
+        return $this->jsonEncoder->encode(
+            [
+                '*' => [
+                    'Magento_Customer/js/invalidation-processor' => [
+                        'invalidationRules' => [
+                            'website-rule' => [
+                                'Magento_Customer/js/invalidation-rules/website-rule' => [
+                                    'scopeConfig' => [
+                                        'websiteId' => $this->getWebsiteId(),
+                                    ]
+                                ]
+                            ]
+                        ]
+                    ]
+                ],
+            ]
+        );
+    }
 }

app/code/Magento/Customer/view/frontend/templates/js/customer-data/invalidation-rules.phtml

@@ -12,18 +12,6 @@
 <script type="text/x-magento-init">
 <?php
     /* @noEscape */
-    echo \Zend_Json::encode([
-        '*' => ['Magento_Customer/js/invalidation-processor' => [
-            'invalidationRules' => [
-                'website-rule' => [
-                    'Magento_Customer/js/invalidation-rules/website-rule' => [
-                        'scopeConfig' => [
-                            'websiteId' => $block->getWebsiteId(),
-                        ]
-                    ]
-                ]
-            ]
-        ]],
-    ]);
-    ?>
+    echo $block->getInvalidationRulesJson();
+?>
 </script>