From 5bc4ed80c37ba8bfcb4a6471c90f3787fc6aa161 Mon Sep 17 00:00:00 2001
From: Steve Boyd <emteknetnz@gmail.com>
Date: Wed, 6 Mar 2024 16:15:41 +1300
Subject: [PATCH] NEW Extensions for elemental

---
 code/elemental/ElementContentExtension.php | 47 ++++++++++++++++++++++
 code/elemental/NumericFieldExtension.php   | 19 +++++++++
 2 files changed, 66 insertions(+)
 create mode 100644 code/elemental/ElementContentExtension.php
 create mode 100644 code/elemental/NumericFieldExtension.php

diff --git a/code/elemental/ElementContentExtension.php b/code/elemental/ElementContentExtension.php
new file mode 100644
index 0000000..d3e7273
--- /dev/null
+++ b/code/elemental/ElementContentExtension.php
@@ -0,0 +1,47 @@
+<?php
+
+namespace SilverStripe\FrameworkTest\Elemental\Extension;
+
+use SilverStripe\Core\Extension;
+use SilverStripe\Forms\FieldList;
+use SilverStripe\ORM\ValidationResult;
+use SilverStripe\Forms\CompositeValidator;
+use SilverStripe\Forms\NumericField;
+use SilverStripe\Forms\RequiredFields;
+use SilverStripe\Forms\TextField;
+
+/**
+ * @extends Extension<ElementContent>
+ */
+class ElementContentExtension extends Extension
+{
+    private static $db = [
+        'MyField' => 'Varchar',
+        'MyInt' => 'Int',
+    ];
+
+    public function validate(ValidationResult $result)
+    {
+        if ($this->owner->Title == 'x') {
+            $result->addFieldError('Title', 'Title cannot be x');
+        }
+        if ($this->owner->MyField == 'x') {
+            $result->addFieldError('MyField', 'MyField cannot be x');
+        }
+        if ($this->owner->Title == 'z' && $this->owner->MyField == 'z') {
+            $result->addError('This is a general error message');
+        }
+    }
+
+    public function updateCMSCompositeValidator(CompositeValidator $compositeValidator)
+    {
+        $compositeValidator->addValidator(new RequiredFields(['Title']));
+    }
+
+    public function updateCMSFields(FieldList $fields)
+    {
+        $fields->removeByName('HTML');
+        $fields->addFieldToTab('Root.Main', TextField::create('MyField', 'My Field'));
+        $fields->addFieldToTab('Root.Main', NumericField::create('MyInt', 'My Int'));
+    }
+}
diff --git a/code/elemental/NumericFieldExtension.php b/code/elemental/NumericFieldExtension.php
new file mode 100644
index 0000000..3fba91c
--- /dev/null
+++ b/code/elemental/NumericFieldExtension.php
@@ -0,0 +1,19 @@
+<?php
+
+namespace SilverStripe\FrameworkTest\Elemental\Extension;
+
+use SilverStripe\Forms\NumericField;
+use SilverStripe\Core\Extension;
+
+/**
+ * @extends Extension<NumericField>
+ */
+class NumericFieldExtension extends Extension
+{
+    public function updateValidationResult($result, $validator)
+    {
+        if ($this->owner->Value() == 1) {
+            $validator->validationError($this->owner->getName(), 'This field cannot be 1');
+        }
+    }
+}