API Refactor template layer into its own module

src/Control/RSS/RSSFeed_Entry.php

@@ -47,7 +47,7 @@ class RSSFeed_Entry extends ModelData
      */
     public function __construct($entry, $titleField, $descriptionField, $authorField)
     {
-        $this->failover = $entry;
+        $this->setFailover($entry);
         $this->titleField = $titleField;
         $this->descriptionField = $descriptionField;
         $this->authorField = $authorField;
@@ -58,19 +58,19 @@ public function __construct($entry, $titleField, $descriptionField, $authorField
     /**
      * Get the description of this entry
      *
-     * @return DBField Returns the description of the entry.
+     * @return DBField|null Returns the description of the entry.
      */
-    public function Title()
+    public function getTitle()
     {
         return $this->rssField($this->titleField);
     }
 
     /**
      * Get the description of this entry
      *
-     * @return DBField Returns the description of the entry.
+     * @return DBField|null Returns the description of the entry.
      */
-    public function Description()
+    public function getDescription()
     {
         $description = $this->rssField($this->descriptionField);
 
@@ -85,9 +85,9 @@ public function Description()
     /**
      * Get the author of this entry
      *
-     * @return DBField Returns the author of the entry.
+     * @return DBField|null Returns the author of the entry.
      */
-    public function Author()
+    public function getAuthor()
     {
         return $this->rssField($this->authorField);
     }
@@ -96,7 +96,7 @@ public function Author()
      * Return the safely casted field
      *
      * @param string $fieldName Name of field
-     * @return DBField
+     * @return DBField|null
      */
     public function rssField($fieldName)
     {

src/Core/CustomMethods.php

@@ -36,6 +36,8 @@ trait CustomMethods
      */
     protected static $built_in_methods = [];
 
+    protected array $extraMethodsForInstance = [];
+
     /**
      * Attempts to locate and call a method dynamically added to a class at runtime if a default cannot be located
      *
@@ -175,7 +177,7 @@ protected function getExtraMethodConfig($method)
             $this->defineMethods();
         }
 
-        return self::class::$extra_methods[$lowerClass][strtolower($method)] ?? null;
+        return $this->extraMethodsForInstance[strtolower($method)] ?? self::class::$extra_methods[$lowerClass][strtolower($method)] ?? null;
     }
 
     /**
@@ -190,6 +192,9 @@ public function allMethodNames($custom = false)
 
         // Query extra methods
         $lowerClass = strtolower(static::class);
+        if ($custom && !empty($this->extraMethodsForInstance)) {
+            $methods = array_merge($this->extraMethodsForInstance, $methods);
+        }
         if ($custom && isset(self::class::$extra_methods[$lowerClass])) {
             $methods = array_merge(self::class::$extra_methods[$lowerClass], $methods);
         }
@@ -256,7 +261,7 @@ protected function findMethodsFrom($object)
      * @param string|int $index an index to use if the property is an array
      * @throws InvalidArgumentException
      */
-    protected function addMethodsFrom($property, $index = null)
+    protected function addMethodsFrom($property, $index = null, bool $static = true)
     {
         $class = static::class;
         $object = ($index !== null) ? $this->{$property}[$index] : $this->$property;
@@ -280,10 +285,18 @@ protected function addMethodsFrom($property, $index = null)
 
         // Merge with extra_methods
         $lowerClass = strtolower($class);
-        if (isset(self::class::$extra_methods[$lowerClass])) {
-            self::class::$extra_methods[$lowerClass] = array_merge(self::class::$extra_methods[$lowerClass], $newMethods);
+        if ($static) {
+            if (isset(self::class::$extra_methods[$lowerClass])) {
+                self::class::$extra_methods[$lowerClass] = array_merge(self::class::$extra_methods[$lowerClass], $newMethods);
+            } else {
+                self::class::$extra_methods[$lowerClass] = $newMethods;
+            }
         } else {
-            self::class::$extra_methods[$lowerClass] = $newMethods;
+            if (!empty($this->extraMethodsForInstance)) {
+                $this->extraMethodsForInstance = array_merge($this->extraMethodsForInstance, $newMethods);
+            } else {
+                $this->extraMethodsForInstance = $newMethods;
+            }
         }
     }
 
@@ -293,7 +306,7 @@ protected function addMethodsFrom($property, $index = null)
      * @param string $property the property name
      * @param string|int $index an index to use if the property is an array
      */
-    protected function removeMethodsFrom($property, $index = null)
+    protected function removeMethodsFrom($property, $index = null, bool $static = true)
     {
         $extension = ($index !== null) ? $this->{$property}[$index] : $this->$property;
         $class = static::class;
@@ -310,12 +323,22 @@ protected function removeMethodsFrom($property, $index = null)
         }
         $methods = $this->findMethodsFrom($extension);
 
-        // Unset by key
-        self::class::$extra_methods[$lowerClass] = array_diff_key(self::class::$extra_methods[$lowerClass], $methods);
+        if ($static) {
+            // Unset by key
+            self::class::$extra_methods[$lowerClass] = array_diff_key(self::class::$extra_methods[$lowerClass], $methods);
 
-        // Clear empty list
-        if (empty(self::class::$extra_methods[$lowerClass])) {
-            unset(self::class::$extra_methods[$lowerClass]);
+            // Clear empty list
+            if (empty(self::class::$extra_methods[$lowerClass])) {
+                unset(self::class::$extra_methods[$lowerClass]);
+            }
+        } else {
+            // Unset by key
+            $this->extraMethodsForInstance = array_diff_key($this->extraMethodsForInstance, $methods);
+
+            // Clear empty list
+            if (empty($this->extraMethodsForInstance)) {
+                unset($this->extraMethodsForInstance);
+            }
         }
     }
 

src/Dev/Backtrace.php

@@ -149,11 +149,11 @@ public static function full_func_name($item, $showArgs = false, $argCharLimit =
         if ($showArgs && isset($item['args'])) {
             $args = [];
             foreach ($item['args'] as $arg) {
-                if (!is_object($arg) || method_exists($arg, '__toString')) {
+                if (is_object($arg)) {
+                    $args[] = get_class($arg);
+                } else {
                     $sarg = is_array($arg) ? 'Array' : strval($arg);
                     $args[] = (strlen($sarg ?? '') > $argCharLimit) ? substr($sarg, 0, $argCharLimit) . '...' : $sarg;
-                } else {
-                    $args[] = get_class($arg);
                 }
             }
 

src/Forms/CheckboxSetField.php

@@ -46,13 +46,13 @@ class CheckboxSetField extends MultiSelectField
      * @param array $properties
      * @return DBHTMLText
      */
-    public function Field($properties = [])
+    public function renderField($properties = [])
     {
         $properties = array_merge($properties, [
             'Options' => $this->getOptions()
         ]);
 
-        return FormField::Field($properties);
+        return FormField::renderField($properties);
     }
 
     /**

src/Forms/ConfirmedPasswordField.php

@@ -195,7 +195,7 @@ public function setTitle($title)
      *
      * @return string
      */
-    public function Field($properties = [])
+    public function renderField($properties = [])
     {
         // Build inner content
         $fieldContent = '';
@@ -209,7 +209,7 @@ public function Field($properties = [])
                 }
             }
 
-            $fieldContent .= $field->FieldHolder(['AttributesHTML' => $this->getAttributesHTMLForChild($field)]);
+            $fieldContent .= $field->renderFieldHolder(['AttributesHTML' => $this->getAttributesHTMLForChild($field)]);
         }
 
         if (!$this->showOnClick) {

src/Forms/CurrencyField_Disabled.php

@@ -19,7 +19,7 @@ class CurrencyField_Disabled extends CurrencyField
      * @param array $properties
      * @return string
      */
-    public function Field($properties = [])
+    public function renderField($properties = [])
     {
         if ($this->value) {
             $val = Convert::raw2xml($this->value);

src/Forms/CurrencyField_Readonly.php

@@ -17,7 +17,7 @@ class CurrencyField_Readonly extends ReadonlyField
      * @param array $properties
      * @return string
      */
-    public function Field($properties = [])
+    public function renderField($properties = [])
     {
         $currencySymbol = DBCurrency::config()->get('currency_symbol');
         if ($this->value) {

src/Forms/DatalessField.php

@@ -42,9 +42,9 @@ public function getAttributes()
      * @param array $properties
      * @return DBHTMLText
      */
-    public function FieldHolder($properties = [])
+    public function renderFieldHolder($properties = [])
     {
-        return $this->Field($properties);
+        return $this->renderField($properties);
     }
 
     /**
@@ -54,9 +54,9 @@ public function FieldHolder($properties = [])
      * @param array $properties
      * @return DBHTMLText
      */
-    public function SmallFieldHolder($properties = [])
+    public function renderSmallFieldHolder($properties = [])
     {
-        return $this->Field($properties);
+        return $this->renderField($properties);
     }
 
     /**

src/Forms/DateField_Disabled.php

@@ -14,7 +14,7 @@ class DateField_Disabled extends DateField
 
     protected $disabled = true;
 
-    public function Field($properties = [])
+    public function renderField($properties = [])
     {
         // Default display value
         $displayValue = '<i>(' . _t('SilverStripe\\Forms\\DateField.NOTSET', 'not set') . ')</i>';

src/Forms/DropdownField.php

@@ -68,7 +68,7 @@
  * DropdownField::create(
  *   'Country',
  *   'Country',
- *   singleton(MyObject::class)->dbObject('Country')->enumValues()
+ *   singleton(MyObject::class)->dbObject('Country')?->enumValues()
  * );
  * </code>
  *
@@ -128,7 +128,7 @@ public function getHasEmptyDefault()
      * @param array $properties
      * @return string
      */
-    public function Field($properties = [])
+    public function renderField($properties = [])
     {
         $options = [];
 
@@ -141,6 +141,6 @@ public function Field($properties = [])
             'Options' => new ArrayList($options)
         ]);
 
-        return parent::Field($properties);
+        return parent::renderField($properties);
     }
 }

src/Forms/FieldGroup.php

@@ -9,8 +9,8 @@
  * Lets you include a nested group of fields inside a template.
  * This control gives you more flexibility over form layout.
  *
- * Note: the child fields within a field group aren't rendered using FieldHolder().  Instead,
- * SmallFieldHolder() is called, which just prefixes $Field with a <label> tag, if the Title is set.
+ * Note: the child fields within a field group aren't rendered using renderFieldHolder().  Instead,
+ * renderSmallFieldHolder() is called, which just prefixes $Field with a <label> tag, if the Title is set.
  *
  * <b>Usage</b>
  *
@@ -154,7 +154,7 @@ public function getMessage()
         /** @var FormField $subfield */
         $messages = [];
         foreach ($dataFields as $subfield) {
-            $message = $subfield->obj('Message')->forTemplate();
+            $message = $subfield->obj('Message')?->forTemplate();
             if ($message) {
                 $messages[] = rtrim($message ?? '', ".");
             }

src/Forms/FieldList.php

@@ -800,13 +800,13 @@ public function fieldPosition(string|FormField $field): int|false
     }
 
     /**
-     * Default template rendering of a FieldList will concatenate all FieldHolder values.
+     * Default template rendering of a FieldList will concatenate all renderFieldHolder values.
      */
     public function forTemplate(): string
     {
         $output = "";
         foreach ($this as $field) {
-            $output .= $field->FieldHolder();
+            $output .= $field->renderFieldHolder();
         }
         return $output;
     }

src/Forms/FileField.php

@@ -79,13 +79,13 @@ public function __construct($name, $title = null, $value = null)
      * @param array $properties
      * @return string
      */
-    public function Field($properties = [])
+    public function renderField($properties = [])
     {
         $properties = array_merge($properties, [
             'MaxFileSize' => $this->getValidator()->getAllowedMaxFileSize()
         ]);
 
-        return parent::Field($properties);
+        return parent::renderField($properties);
     }
 
     public function getAttributes()

src/Forms/Form.php

@@ -58,9 +58,9 @@
  * template when called through GET instead of POST.
  *
  * By appending to this URL, you can render individual form elements
- * through the {@link FormField->FieldHolder()} method.
+ * through the {@link FormField->renderFieldHolder()} method.
  * For example, the "URLSegment" field in a standard CMS form would be
- * accessible through "admin/EditForm/field/URLSegment/FieldHolder".
+ * accessible through "admin/EditForm/field/URLSegment/renderFieldHolder".
  */
 class Form extends ModelData implements HasRequestHandler
 {

src/Forms/FormAction.php

@@ -144,7 +144,7 @@ public function setFullAction($fullAction)
      * @param array $properties
      * @return DBHTMLText
      */
-    public function Field($properties = [])
+    public function renderField($properties = [])
     {
         $properties = array_merge(
             $properties,
@@ -155,16 +155,16 @@ public function Field($properties = [])
             ]
         );
 
-        return parent::Field($properties);
+        return parent::renderField($properties);
     }
 
     /**
      * @param array $properties
      * @return DBHTMLText
      */
-    public function FieldHolder($properties = [])
+    public function renderFieldHolder($properties = [])
     {
-        return $this->Field($properties);
+        return $this->renderField($properties);
     }
 
     public function Type()