API Refactor template layer into its own module

Includes the following large-scale changes:
- Impoved barrier between model and view layers
- Improved casting of scalar to relevant DBField types
- Improved capabilities for rendering arbitrary data in templates

composer.json

@@ -39,6 +39,7 @@
         "sensiolabs/ansi-to-html": "^1.2",
         "silverstripe/config": "^3",
         "silverstripe/assets": "^3",
+        "silverstripe/supported-modules": "^1.1",
         "silverstripe/vendor-plugin": "^2",
         "sminnee/callbacklist": "^0.1.1",
         "symfony/cache": "^7.0",

src/Control/Controller.php

@@ -22,7 +22,6 @@ use SilverStripe\View\TemplateGlobalProvider;
  */
 class Controller extends RequestHandler implements TemplateGlobalProvider
 {
-
     /**
      * An array of arguments extracted from the URL.
      *
@@ -641,9 +640,8 @@ class Controller extends RequestHandler implements TemplateGlobalProvider
      * Caution: All parameters are expected to be URI-encoded already.
      *
      * @param string|array $arg One or more link segments, or list of link segments as an array
-     * @return string
      */
-    public static function join_links($arg = null)
+    public static function join_links($arg = null): string
     {
         if (func_num_args() === 1 && is_array($arg)) {
             $args = $arg;

src/Control/HTTPResponse.php

@@ -8,12 +8,11 @@ use SilverStripe\Core\Convert;
 use SilverStripe\Core\Injector\Injectable;
 use SilverStripe\Core\Injector\Injector;
 use SilverStripe\View\Requirements;
-use Stringable;
 
 /**
  * Represents a response returned by a controller.
  */
-class HTTPResponse implements Stringable
+class HTTPResponse
 {
     use Injectable;
 
@@ -446,7 +445,7 @@ EOT
     /**
      * The HTTP response represented as a raw string
      */
-    public function __toString(): string
+    public function __toString()
     {
         $headers = [];
         foreach ($this->getHeaders() as $header => $values) {

src/Core/Manifest/ModuleResource.php

@@ -5,13 +5,12 @@ namespace SilverStripe\Core\Manifest;
 use InvalidArgumentException;
 use SilverStripe\Core\Injector\Injector;
 use SilverStripe\Core\Path;
-use Stringable;
 
 /**
  * This object represents a single resource file attached to a module, and can be used
  * as a reference to this to be later turned into either a URL or file path.
  */
-class ModuleResource implements Stringable
+class ModuleResource
 {
     /**
      * @var Module
@@ -116,7 +115,7 @@ class ModuleResource implements Stringable
     /**
      * Get relative path
      */
-    public function __toString(): string
+    public function __toString()
     {
         return $this->getRelativePath();
     }

src/Dev/Deprecation.php

@@ -3,11 +3,14 @@
 namespace SilverStripe\Dev;
 
 use BadMethodCallException;
+use RuntimeException;
 use SilverStripe\Control\Director;
 use SilverStripe\Core\Environment;
 use SilverStripe\Core\Injector\InjectionCreator;
 use SilverStripe\Core\Injector\InjectorLoader;
 use SilverStripe\Core\Manifest\Module;
+use SilverStripe\Core\Path;
+use SilverStripe\SupportedModules\MetaData;
 
 /**
  * Handles raising an notice when accessing a deprecated method, class, configuration, or behaviour.
@@ -77,6 +80,18 @@ class Deprecation
      */
     private static bool $showNoReplacementNotices = false;
 
+    /**
+     * @internal
+     */
+    private static bool $showNoticesCalledFromSupportedCode = false;
+
+    /**
+     * Cache of supported module directories, read from silverstripe/supported-modules repositories.json
+     *
+     * @internal
+     */
+    private static array $supportedModuleDirectories = [];
+
     /**
      * Enable throwing deprecation warnings. By default, this excludes warnings for
      * deprecated code which is called by core Silverstripe modules.
@@ -146,6 +161,12 @@ class Deprecation
         if (!$level) {
             $level = 1;
         }
+        $called = Deprecation::get_called_from_trace($backtrace, $level);
+        return ($called['class'] ?? '') . ($called['type'] ?? '') . ($called['function'] ?? '');
+    }
+
+    private static function get_called_from_trace(array $backtrace, int $level): array
+    {
         $newLevel = $level;
         // handle closures inside withSuppressedNotice()
         if (Deprecation::$insideNoticeSuppression
@@ -163,8 +184,51 @@ class Deprecation
         if ($level == 4 && ($backtrace[$newLevel]['class'] ?? '') === InjectionCreator::class) {
             $newLevel = $newLevel + 4;
         }
+        // handle noticeWithNoReplacment()
+        foreach ($backtrace as $trace) {
+            if (($trace['class'] ?? '') === Deprecation::class
+                && ($trace['function'] ?? '') === 'noticeWithNoReplacment'
+            ) {
+                $newLevel = $newLevel + 1;
+                break;
+            }
+        }
         $called = $backtrace[$newLevel] ?? [];
-        return ($called['class'] ?? '') . ($called['type'] ?? '') . ($called['function'] ?? '');
+        return $called;
+    }
+
+    private static function isCalledFromSupportedCode(array $backtrace): bool
+    {
+        $called = Deprecation::get_called_from_trace($backtrace, 1);
+        $file = $called['file'] ?? '';
+        if (!$file) {
+            return false;
+        }
+        return Deprecation::fileIsInSupportedModule($file);
+    }
+
+    /**
+     * Check whether a file (path to file) is in a supported module
+     */
+    public static function fileIsInSupportedModule(string $file): bool
+    {
+        // Cache the supported modules list
+        if (count(Deprecation::$supportedModuleDirectories) === 0) {
+            // Do not make a network request when fetching metadata which could slow down a website
+            // While there is a small risk of the list being out of date, there is minimal downside to this
+            $metaData = MetaData::getAllRepositoryMetaData(fromRemote: false);
+            $dirs = array_map(fn($module) => "/vendor/{$module['packagist']}/", $metaData['supportedModules']);
+            // This is a special case for silverstripe-framework when running in CI
+            // Needed because module is run in the root folder rather than in the vendor folder
+            $dirs[] = '/silverstripe-framework/';
+            Deprecation::$supportedModuleDirectories = $dirs;
+        }
+        foreach (Deprecation::$supportedModuleDirectories as $dir) {
+            if (str_contains($file, $dir)) {
+                return true;
+            }
+        }
+        return false;
     }
 
     public static function isEnabled(): bool
@@ -245,6 +309,22 @@ class Deprecation
         return Deprecation::$shouldShowForCli;
     }
 
+    /**
+     * If true, deprecation warnings will be shown for deprecated code which is called by core Silverstripe modules.
+     */
+    public static function getShowNoticesCalledFromSupportedCode(): bool
+    {
+        return Deprecation::$showNoticesCalledFromSupportedCode;
+    }
+
+    /**
+     * Set whether deprecation warnings will be shown for deprecated code which is called by core Silverstripe modules.
+     */
+    public static function setShowNoticesCalledFromSupportedCode(bool $value): void
+    {
+        Deprecation::$showNoticesCalledFromSupportedCode = $value;
+    }
+
     public static function outputNotices(): void
     {
         if (!Deprecation::isEnabled()) {
@@ -258,9 +338,13 @@ class Deprecation
             $arr = array_shift(Deprecation::$userErrorMessageBuffer);
             $message = $arr['message'];
             $calledWithNoticeSuppression = $arr['calledWithNoticeSuppression'];
+            $isCalledFromSupportedCode = $arr['isCalledFromSupportedCode'];
             if ($calledWithNoticeSuppression && !Deprecation::$showNoReplacementNotices) {
                 continue;
             }
+            if ($isCalledFromSupportedCode && !Deprecation::$showNoticesCalledFromSupportedCode) {
+                continue;
+            }
             Deprecation::$isTriggeringError = true;
             user_error($message, E_USER_DEPRECATED);
             Deprecation::$isTriggeringError = false;
@@ -294,6 +378,10 @@ class Deprecation
                 $data = [
                     'key' => sha1($string),
                     'message' => $string,
+                    // Setting to `false` as here as any SCOPE_CONFIG notices from supported modules have
+                    // already been filtered out if needed if they came from a supported module in
+                    // SilverStripe\Config\Transformer\YamlTransformer::checkForDeprecatedConfig()
+                    'isCalledFromSupportedCode' => false,
                     'calledWithNoticeSuppression' => Deprecation::$insideNoticeSuppression
                 ];
             } else {
@@ -322,13 +410,13 @@ class Deprecation
 
                 $level = Deprecation::$insideNoticeSuppression ? 4 : 2;
                 $string .= " Called from " . Deprecation::get_called_method_from_trace($backtrace, $level) . '.';
-
                 if ($caller) {
                     $string = $caller . ' is deprecated.' . ($string ? ' ' . $string : '');
                 }
                 $data = [
                     'key' => sha1($string),
                     'message' => $string,
+                    'isCalledFromSupportedCode' => Deprecation::isCalledFromSupportedCode($backtrace),
                     'calledWithNoticeSuppression' => Deprecation::$insideNoticeSuppression
                 ];
             }
@@ -360,6 +448,23 @@ class Deprecation
         }
     }
 
+    /**
+     * Shorthand method to create a suppressed notice for something with no immediate replacement.
+     * If $message is empty, then a standardised message will be used
+     */
+    public static function noticeWithNoReplacment(
+        string $atVersion,
+        string $message = '',
+        int $scope = Deprecation::SCOPE_METHOD
+    ): void {
+        if ($message === '') {
+            $message = 'Will be removed without equivalent functionality to replace it.';
+        }
+        Deprecation::withSuppressedNotice(
+            fn() => Deprecation::notice($atVersion, $message, $scope)
+        );
+    }
+
     private static function varAsBoolean($val): bool
     {
         if (is_string($val)) {

src/Forms/GridField/GridFieldDataColumns.php

@@ -6,6 +6,7 @@ use SilverStripe\Core\Convert;
 use InvalidArgumentException;
 use LogicException;
 use SilverStripe\Model\ModelData;
+use SilverStripe\Dev\Deprecation;
 
 /**
  * @see GridField

src/Forms/GridField/GridState.php

@@ -5,7 +5,6 @@ namespace SilverStripe\Forms\GridField;
 use SilverStripe\Core\Convert;
 use SilverStripe\Forms\HiddenField;
 use SilverStripe\ORM\DataList;
-use Stringable;
 
 /**
  * This class is a snapshot of the current status of a {@link GridField}.
@@ -15,7 +14,7 @@ use Stringable;
  *
  * @see GridField
  */
-class GridState extends HiddenField implements Stringable
+class GridState extends HiddenField
 {
 
     /**
@@ -130,7 +129,7 @@ class GridState extends HiddenField implements Stringable
         return Convert::raw2att($this->Value());
     }
 
-    public function __toString(): string
+    public function __toString()
     {
         return $this->Value();
     }

src/Forms/GridField/GridState_Data.php

@@ -2,15 +2,13 @@
 
 namespace SilverStripe\Forms\GridField;
 
-use Stringable;
-
 /**
  * Simple set of data, similar to stdClass, but without the notice-level
  * errors.
  *
  * @see GridState
  */
-class GridState_Data implements Stringable
+class GridState_Data
 {
 
     /**
@@ -96,7 +94,7 @@ class GridState_Data implements Stringable
         unset($this->data[$name]);
     }
 
-    public function __toString(): string
+    public function __toString()
     {
         if (!$this->data) {
             return "";

src/Model/ModelData.php

@@ -18,7 +18,6 @@ use SilverStripe\ORM\FieldType\DBHTMLText;
 use SilverStripe\Model\ArrayData;
 use SilverStripe\View\CastingService;
 use SilverStripe\View\SSViewer;
-use Stringable;
 use UnexpectedValueException;
 
 /**
@@ -28,7 +27,7 @@ use UnexpectedValueException;
  * is provided and automatically escaped by ModelData. Any class that needs to be available to a view (controllers,
  * {@link DataObject}s, page controls) should inherit from this class.
  */
-class ModelData implements Stringable
+class ModelData
 {
     use Extensible {
         defineMethods as extensibleDefineMethods;
@@ -306,9 +305,12 @@ class ModelData implements Stringable
         return true;
     }
 
+    /**
+     * Return the class name (though subclasses may return something else)
+     */
     public function __toString(): string
     {
-        return $this->forTemplate();
+        return static::class;
     }
 
     /**
@@ -548,8 +550,9 @@ class ModelData implements Stringable
      */
     private function objCacheName(string $fieldName, array $arguments = []): string
     {
-        return empty($arguments)
+        $name = empty($arguments)
             ? $fieldName
             : $fieldName . ":" . var_export($arguments, true);
+        return md5($name);
     }
 }

src/ORM/Connect/MySQLDatabase.php

@@ -10,7 +10,6 @@ use SilverStripe\Model\List\PaginatedList;
 use SilverStripe\ORM\DataList;
 use SilverStripe\Model\List\ArrayList;
 use SilverStripe\ORM\DataObject;
-use SilverStripe\ORM\Queries\SQLSelect;
 use Exception;
 
 /**
@@ -31,7 +30,7 @@ class MySQLDatabase extends Database implements TransactionManager
      * @config
      * @var String
      */
-    private static $connection_charset = 'utf8';
+    private static $connection_charset = 'utf8mb4';
 
     /**
      * Default connection collation
@@ -39,7 +38,7 @@ class MySQLDatabase extends Database implements TransactionManager
      * @config
      * @var string
      */
-    private static $connection_collation = 'utf8_general_ci';
+    private static $connection_collation = 'utf8mb4_unicode_ci';
 
     /**
      * Default charset
@@ -47,7 +46,7 @@ class MySQLDatabase extends Database implements TransactionManager
      * @config
      * @var string
      */
-    private static $charset = 'utf8';
+    private static $charset = 'utf8mb4';
 
     /**
      * SQL Mode used on connections to MySQL. Defaults to ANSI. For basic ORM
@@ -73,7 +72,7 @@ class MySQLDatabase extends Database implements TransactionManager
      * @config
      * @var string
      */
-    private static $collation = 'utf8_general_ci';
+    private static $collation = 'utf8mb4_unicode_ci';
 
     public function connect($parameters)
     {

src/ORM/FieldType/DBBoolean.php

@@ -15,7 +15,8 @@ class DBBoolean extends DBField
 {
     public function __construct(?string $name = null, bool|int $defaultVal = 0)
     {
-        $this->defaultVal = ($defaultVal) ? 1 : 0;
+        $defaultValue = $defaultVal ? 1 : 0;
+        $this->setDefaultValue($defaultValue);
 
         parent::__construct($name);
     }
@@ -27,7 +28,7 @@ class DBBoolean extends DBField
             'precision' => 1,
             'sign' => 'unsigned',
             'null' => 'not null',
-            'default' => $this->defaultVal,
+            'default' => $this->getDefaultValue(),
             'arrayValue' => $this->arrayValue
         ];
         $values = ['type' => 'boolean', 'parts' => $parts];

src/ORM/FieldType/DBField.php

@@ -103,6 +103,7 @@ abstract class DBField extends ModelData implements DBIndexable
      * Default value in the database.
      * Might be overridden on DataObject-level, but still useful for setting defaults on
      * already existing records after a db-build.
+     * @deprecated 5.4.0 Use getDefaultValue() and setDefaultValue() instead
      */
     protected mixed $defaultVal = null;
 
@@ -520,6 +521,11 @@ abstract class DBField extends ModelData implements DBIndexable
 DBG;
     }
 
+    public function __toString(): string
+    {
+        return (string)$this->forTemplate();
+    }
+
     public function getArrayValue()
     {
         return $this->arrayValue;

src/ORM/FieldType/DBFloat.php

@@ -13,7 +13,8 @@ class DBFloat extends DBField
 {
     public function __construct(?string $name = null, float|int $defaultVal = 0)
     {
-        $this->defaultVal = is_float($defaultVal) ? $defaultVal : (float) 0;
+        $defaultValue = is_float($defaultVal) ? $defaultVal : (float) 0;
+        $this->setDefaultValue($defaultValue);
 
         parent::__construct($name);
     }
@@ -23,7 +24,7 @@ class DBFloat extends DBField
         $parts = [
             'datatype' => 'float',
             'null' => 'not null',
-            'default' => $this->defaultVal,
+            'default' => $this->getDefaultValue(),
             'arrayValue' => $this->arrayValue
         ];
         $values = ['type' => 'float', 'parts' => $parts];

src/ORM/FieldType/DBInt.php

@@ -16,7 +16,8 @@ class DBInt extends DBField
 {
     public function __construct(?string $name = null, int $defaultVal = 0)
     {
-        $this->defaultVal = is_int($defaultVal) ? $defaultVal : 0;
+        $defaultValue = is_int($defaultVal) ? $defaultVal : 0;
+        $this->setDefaultValue($defaultValue);
 
         parent::__construct($name);
     }
@@ -44,7 +45,7 @@ class DBInt extends DBField
             'datatype' => 'int',
             'precision' => 11,
             'null' => 'not null',
-            'default' => $this->defaultVal,
+            'default' => $this->getDefaultValue(),
             'arrayValue' => $this->arrayValue
         ];
         $values = ['type' => 'int', 'parts' => $parts];

src/ORM/Queries/SQLExpression.php

@@ -6,13 +6,12 @@ use SilverStripe\Core\Convert;
 use SilverStripe\ORM\Connect\Query;
 use SilverStripe\ORM\DB;
 use Exception;
-use Stringable;
 
 /**
  * Abstract base class for an object representing an SQL query.
  * The various parts of the SQL query can be manipulated individually.
  */
-abstract class SQLExpression implements Stringable
+abstract class SQLExpression
 {
 
     /**
@@ -46,7 +45,7 @@ abstract class SQLExpression implements Stringable
     /**
      * Return the generated SQL string for this query
      */
-    public function __toString(): string
+    public function __toString()
     {
         try {
             $sql = $this->sql($parameters);

src/View/CastingService.php

@@ -21,33 +21,33 @@ class CastingService
     /**
      * Cast a value to the relevant object (usually a DBField instance) for use in the view layer.
      *
-     * @param null|array|ModelData $source Where the data originates from. This is used both to check for casting helpers
+     * @param ModelData|array|null $source Where the data originates from. This is used both to check for casting helpers
      * and to help set the value in cast DBField instances.
      * @param bool $strict If true, an object will be returned even if $data is null.
      */
-    public function cast(mixed $data, null|array|ModelData $source = null, string $fieldName = '', bool $strict = false): ?object
+    public function cast(mixed $data, ModelData|array|null $source = null, string $fieldName = '', bool $strict = false): ?object
     {
-        // null is null - we shouldn't cast it to an object, because that makes it harder
-        // for downstream checks to know there's "no value".
-        if (!$strict && $data === null) {
-            return null;
-        }
-
         // Assume anything that's an object is intentionally using whatever class it's using
         // and don't cast it.
         if (is_object($data)) {
             return $data;
         }
 
-        $service = null;
+        // null is null - we shouldn't cast it to an object, because that makes it harder
+        // for downstream checks to know there's "no value".
+        if (!$strict && $data === null) {
+            return null;
+        }
+
+        $serviceKey = null;
         if ($source instanceof ModelData) {
-            $service = $source->castingHelper($fieldName);
+            $serviceKey = $source->castingHelper($fieldName);
         }
 
         // Cast to object if there's an explicit casting for this field
         // Explicit casts take precedence over array casting
-        if ($service) {
+        if ($serviceKey) {
-            $castObject = Injector::inst()->create($service, $fieldName);
+            $castObject = Injector::inst()->create($serviceKey, $fieldName);
             if (!ClassInfo::hasMethod($castObject, 'setValue')) {
                 throw new LogicException('Explicit casting service must have a setValue method.');
             }
@@ -61,8 +61,8 @@ class CastingService
         }
 
         // Fall back to default casting
-        $service = $this->defaultService($data, $source, $fieldName);
+        $serviceKey = $this->getDefaultServiceKey($data, $source, $fieldName);
-        $castObject = Injector::inst()->create($service, $fieldName);
+        $castObject = Injector::inst()->create($serviceKey, $fieldName);
         if (!ClassInfo::hasMethod($castObject, 'setValue')) {
             throw new LogicException('Default service must have a setValue method.');
         }
@@ -73,7 +73,7 @@ class CastingService
     /**
      * Get the default service to use if no explicit service is declared for this field on the source model.
      */
-    private function defaultService(mixed $data, mixed $source = null, string $fieldName = ''): ?string
+    private function getDefaultServiceKey(mixed $data, mixed $source = null, string $fieldName = ''): ?string
     {
         $default = null;
         if ($source instanceof ModelData) {
@@ -81,7 +81,7 @@ class CastingService
             if ($default === null) {
                 $failover = $source->getFailover();
                 if ($failover) {
-                    $default = $this->defaultService($data, $failover, $fieldName);
+                    $default = $this->getDefaultServiceKey($data, $failover, $fieldName);
                 }
             }
         }

src/View/SSTemplateParser.php

@@ -1189,7 +1189,7 @@ class SSTemplateParser extends Parser implements TemplateParser
     	$matchrule = "QuotedString"; $result = $this->construct($matchrule, $matchrule, null);
     	$_154 = NULL;
     	do {
-    		$stack[] = $result; $result = $this->construct( $matchrule, "q" ); 
+    		$stack[] = $result; $result = $this->construct( $matchrule, "q" );
     		if (( $subres = $this->rx( '/[\'"]/' ) ) !== FALSE) {
     			$result["text"] .= $subres;
     			$subres = $result; $result = array_pop($stack);
@@ -1199,7 +1199,7 @@ class SSTemplateParser extends Parser implements TemplateParser
     			$result = array_pop($stack);
     			$_154 = FALSE; break;
     		}
-    		$stack[] = $result; $result = $this->construct( $matchrule, "String" ); 
+    		$stack[] = $result; $result = $this->construct( $matchrule, "String" );
     		if (( $subres = $this->rx( '/ (\\\\\\\\ | \\\\. | [^'.$this->expression($result, $stack, 'q').'\\\\])* /' ) ) !== FALSE) {
     			$result["text"] .= $subres;
     			$subres = $result; $result = array_pop($stack);
@@ -1842,7 +1842,7 @@ class SSTemplateParser extends Parser implements TemplateParser
     		$pos_255 = $this->pos;
     		$_254 = NULL;
     		do {
-    			$stack[] = $result; $result = $this->construct( $matchrule, "Not" ); 
+    			$stack[] = $result; $result = $this->construct( $matchrule, "Not" );
     			if (( $subres = $this->literal( 'not' ) ) !== FALSE) {
     				$result["text"] .= $subres;
     				$subres = $result; $result = array_pop($stack);
@@ -2235,7 +2235,7 @@ class SSTemplateParser extends Parser implements TemplateParser
     		else { $_330 = FALSE; break; }
     		if (( $subres = $this->whitespace(  ) ) !== FALSE) { $result["text"] .= $subres; }
     		else { $_330 = FALSE; break; }
-    		$stack[] = $result; $result = $this->construct( $matchrule, "Call" ); 
+    		$stack[] = $result; $result = $this->construct( $matchrule, "Call" );
     		$_326 = NULL;
     		do {
     			$matcher = 'match_'.'Word'; $key = $matcher; $pos = $this->pos;
@@ -2740,7 +2740,7 @@ class SSTemplateParser extends Parser implements TemplateParser
     		$_423 = NULL;
     		do {
     			if (( $subres = $this->whitespace(  ) ) !== FALSE) { $result["text"] .= $subres; }
-    			$stack[] = $result; $result = $this->construct( $matchrule, "Conditional" ); 
+    			$stack[] = $result; $result = $this->construct( $matchrule, "Conditional" );
     			$_419 = NULL;
     			do {
     				$_417 = NULL;
@@ -3166,7 +3166,7 @@ class SSTemplateParser extends Parser implements TemplateParser
     		if (( $subres = $this->literal( '<%' ) ) !== FALSE) { $result["text"] .= $subres; }
     		else { $_555 = FALSE; break; }
     		if (( $subres = $this->whitespace(  ) ) !== FALSE) { $result["text"] .= $subres; }
-    		$stack[] = $result; $result = $this->construct( $matchrule, "CacheTag" ); 
+    		$stack[] = $result; $result = $this->construct( $matchrule, "CacheTag" );
     		$_508 = NULL;
     		do {
     			$_506 = NULL;
@@ -3225,7 +3225,7 @@ class SSTemplateParser extends Parser implements TemplateParser
     		$_524 = NULL;
     		do {
     			if (( $subres = $this->whitespace(  ) ) !== FALSE) { $result["text"] .= $subres; }
-    			$stack[] = $result; $result = $this->construct( $matchrule, "Conditional" ); 
+    			$stack[] = $result; $result = $this->construct( $matchrule, "Conditional" );
     			$_520 = NULL;
     			do {
     				$_518 = NULL;
@@ -4165,7 +4165,7 @@ class SSTemplateParser extends Parser implements TemplateParser
     			unset( $pos_685 );
     		}
     		if (( $subres = $this->whitespace(  ) ) !== FALSE) { $result["text"] .= $subres; }
-    		$stack[] = $result; $result = $this->construct( $matchrule, "Zap" ); 
+    		$stack[] = $result; $result = $this->construct( $matchrule, "Zap" );
     		if (( $subres = $this->literal( '%>' ) ) !== FALSE) {
     			$result["text"] .= $subres;
     			$subres = $result; $result = array_pop($stack);
@@ -4556,7 +4556,7 @@ class SSTemplateParser extends Parser implements TemplateParser
     		if (( $subres = $this->literal( '<%' ) ) !== FALSE) { $result["text"] .= $subres; }
     		else { $_743 = FALSE; break; }
     		if (( $subres = $this->whitespace(  ) ) !== FALSE) { $result["text"] .= $subres; }
-    		$stack[] = $result; $result = $this->construct( $matchrule, "Tag" ); 
+    		$stack[] = $result; $result = $this->construct( $matchrule, "Tag" );
     		$_737 = NULL;
     		do {
     			if (( $subres = $this->literal( 'end_' ) ) !== FALSE) { $result["text"] .= $subres; }

src/View/SSViewer.php

@@ -372,9 +372,8 @@ PHP;
 
         if ($isXhtml) {
             return "<base href=\"$base\" />";
-        } else {
-            return "<base href=\"$base\">";
         }
+        return "<base href=\"$base\">";
     }
 
     /**

src/View/ThemeResourceLoader.php

@@ -9,6 +9,7 @@ use SilverStripe\Core\Injector\Injector;
 use SilverStripe\Core\Manifest\ModuleLoader;
 use SilverStripe\Core\Manifest\ModuleResourceLoader;
 use SilverStripe\Core\Path;
+use SilverStripe\Dev\Deprecation;
 
 /**
  * Handles finding templates from a stack of template manifest objects.

src/i18n/Messages/Symfony/FlushInvalidatedResource.php

@@ -3,7 +3,6 @@
 namespace SilverStripe\i18n\Messages\Symfony;
 
 use SilverStripe\Core\Flushable;
-use Stringable;
 use Symfony\Component\Config\Resource\SelfCheckingResourceInterface;
 
 /**
@@ -13,9 +12,9 @@ use Symfony\Component\Config\Resource\SelfCheckingResourceInterface;
  * @link https://media.giphy.com/media/fRRD3T37DeY6Y/giphy.gif for use case
  * @see DirectoryResource
  */
-class FlushInvalidatedResource implements SelfCheckingResourceInterface, Flushable, Stringable
+class FlushInvalidatedResource implements SelfCheckingResourceInterface, Flushable
 {
-    public function __toString(): string
+    public function __toString()
     {
         return md5(__CLASS__);
     }

tests/php/Dev/DeprecationTest.php

@@ -26,6 +26,8 @@ class DeprecationTest extends SapphireTest
 
     private bool $noticesWereEnabled = false;
 
+    private bool $showSupportedNoticesWasEnabled = false;
+
     protected function setup(): void
     {
         // Use custom error handler for two reasons:
@@ -34,6 +36,7 @@ class DeprecationTest extends SapphireTest
         //   https://github.com/laminas/laminas-di/pull/30#issuecomment-927585210
         parent::setup();
         $this->noticesWereEnabled = Deprecation::isEnabled();
+        $this->showSupportedNoticesWasEnabled = Deprecation::getShowNoticesCalledFromSupportedCode();
         $this->oldHandler = set_error_handler(function (int $errno, string $errstr, string $errfile, int $errline) {
             if ($errno === E_USER_DEPRECATED) {
                 if (str_contains($errstr, 'SilverStripe\\Dev\\Tests\\DeprecationTest')) {
@@ -49,6 +52,8 @@ class DeprecationTest extends SapphireTest
             // Fallback to default PHP error handler
             return false;
         });
+        // This is required to clear out the notice from instantiating DeprecationTestObject in TableBuilder::buildTables().
+        Deprecation::outputNotices();
     }
 
     protected function tearDown(): void
@@ -58,6 +63,7 @@ class DeprecationTest extends SapphireTest
         } else {
             Deprecation::disable();
         }
+        Deprecation::setShowNoticesCalledFromSupportedCode($this->showSupportedNoticesWasEnabled);
         restore_error_handler();
         $this->oldHandler = null;
         parent::tearDown();
@@ -69,6 +75,18 @@ class DeprecationTest extends SapphireTest
         return 'abc';
     }
 
+    private function myDeprecatedMethodNoReplacement(): string
+    {
+        Deprecation::noticeWithNoReplacment('1.2.3');
+        return 'abc';
+    }
+
+    private function enableDeprecationNotices(bool $showNoReplacementNotices = false): void
+    {
+        Deprecation::enable($showNoReplacementNotices);
+        Deprecation::setShowNoticesCalledFromSupportedCode(true);
+    }
+
     public function testNotice()
     {
         $message = implode(' ', [
@@ -78,7 +96,7 @@ class DeprecationTest extends SapphireTest
         ]);
         $this->expectException(DeprecationTestException::class);
         $this->expectExceptionMessage($message);
-        Deprecation::enable();
+        $this->enableDeprecationNotices();
         $ret = $this->myDeprecatedMethod();
         $this->assertSame('abc', $ret);
         // call outputNotices() directly because the regular shutdown function that emits
@@ -86,6 +104,29 @@ class DeprecationTest extends SapphireTest
         Deprecation::outputNotices();
     }
 
+    public function testNoticeNoReplacement()
+    {
+        $message = implode(' ', [
+            'SilverStripe\Dev\Tests\DeprecationTest->myDeprecatedMethodNoReplacement is deprecated.',
+            'Will be removed without equivalent functionality to replace it.',
+            'Called from SilverStripe\Dev\Tests\DeprecationTest->testNoticeNoReplacement.'
+        ]);
+        $this->expectDeprecation();
+        $this->expectDeprecationMessage($message);
+        $this->enableDeprecationNotices(true);
+        $ret = $this->myDeprecatedMethodNoReplacement();
+        $this->assertSame('abc', $ret);
+        Deprecation::outputNotices();
+    }
+
+    public function testNoticeNoReplacementNoSupressed()
+    {
+        $this->enableDeprecationNotices();
+        $ret = $this->myDeprecatedMethodNoReplacement();
+        $this->assertSame('abc', $ret);
+        Deprecation::outputNotices();
+    }
+
     public function testCallUserFunc()
     {
         $message = implode(' ', [
@@ -95,7 +136,7 @@ class DeprecationTest extends SapphireTest
         ]);
         $this->expectException(DeprecationTestException::class);
         $this->expectExceptionMessage($message);
-        Deprecation::enable();
+        $this->enableDeprecationNotices();
         $ret = call_user_func([$this, 'myDeprecatedMethod']);
         $this->assertSame('abc', $ret);
         Deprecation::outputNotices();
@@ -110,7 +151,7 @@ class DeprecationTest extends SapphireTest
         ]);
         $this->expectException(DeprecationTestException::class);
         $this->expectExceptionMessage($message);
-        Deprecation::enable();
+        $this->enableDeprecationNotices();
         $ret = call_user_func_array([$this, 'myDeprecatedMethod'], []);
         $this->assertSame('abc', $ret);
         Deprecation::outputNotices();
@@ -118,7 +159,7 @@ class DeprecationTest extends SapphireTest
 
     public function testwithSuppressedNoticeDefault()
     {
-        Deprecation::enable();
+        $this->enableDeprecationNotices();
         $ret = Deprecation::withSuppressedNotice(function () {
             return $this->myDeprecatedMethod();
         });
@@ -135,7 +176,7 @@ class DeprecationTest extends SapphireTest
         ]);
         $this->expectException(DeprecationTestException::class);
         $this->expectExceptionMessage($message);
-        Deprecation::enable(true);
+        $this->enableDeprecationNotices(true);
         $ret = Deprecation::withSuppressedNotice(function () {
             return $this->myDeprecatedMethod();
         });
@@ -152,7 +193,7 @@ class DeprecationTest extends SapphireTest
         ]);
         $this->expectException(DeprecationTestException::class);
         $this->expectExceptionMessage($message);
-        Deprecation::enable(true);
+        $this->enableDeprecationNotices(true);
         $ret = Deprecation::withSuppressedNotice(function () {
             return call_user_func([$this, 'myDeprecatedMethod']);
         });
@@ -169,7 +210,7 @@ class DeprecationTest extends SapphireTest
         ]);
         $this->expectException(DeprecationTestException::class);
         $this->expectExceptionMessage($message);
-        Deprecation::enable(true);
+        $this->enableDeprecationNotices(true);
         Deprecation::withSuppressedNotice(function () {
             Deprecation::notice('123', 'My message.');
         });
@@ -185,7 +226,7 @@ class DeprecationTest extends SapphireTest
         ]);
         $this->expectException(DeprecationTestException::class);
         $this->expectExceptionMessage($message);
-        Deprecation::enable(true);
+        $this->enableDeprecationNotices(true);
         // using this syntax because my IDE was complaining about DeprecationTestObject not existing
         // when trying to use `new DeprecationTestObject();`
         $class = DeprecationTestObject::class;
@@ -202,7 +243,7 @@ class DeprecationTest extends SapphireTest
         ]);
         $this->expectException(DeprecationTestException::class);
         $this->expectExceptionMessage($message);
-        Deprecation::enable(true);
+        $this->enableDeprecationNotices(true);
         Injector::inst()->get(DeprecationTestObject::class);
         Deprecation::outputNotices();
     }
@@ -218,6 +259,50 @@ class DeprecationTest extends SapphireTest
         Deprecation::outputNotices();
     }
 
+    public function testshowNoticesCalledFromSupportedCode()
+    {
+        $this->expectNotToPerformAssertions();
+        $this->enableDeprecationNotices(true);
+        // showNoticesCalledFromSupportedCode is set to true by default for these unit tests
+        // as it is testing code within vendor/silverstripe
+        // This test is to ensure that the method works as expected when we disable this
+        // and we should expect no exceptions to be thrown
+        //
+        // Note specifically NOT testing the following because it's counted as being called
+        // from phpunit itself, which is not considered supported code
+        // Deprecation::withSuppressedNotice(function () {
+        //     Deprecation::notice('123', 'My message.');
+        // });
+        Deprecation::setShowNoticesCalledFromSupportedCode(false);
+        // notice()
+        $this->myDeprecatedMethod();
+        // noticeNoReplacement()
+        $this->myDeprecatedMethodNoReplacement();
+        // callUserFunc()
+        call_user_func([$this, 'myDeprecatedMethod']);
+        // callUserFuncArray()
+        call_user_func_array([$this, 'myDeprecatedMethod'], []);
+        // withSuppressedNotice()
+        Deprecation::withSuppressedNotice(
+            fn() => $this->myDeprecatedMethod()
+        );
+        // withSuppressedNoticeTrue()
+        Deprecation::withSuppressedNotice(function () {
+            $this->myDeprecatedMethod();
+        });
+        // withSuppressedNoticeTrueCallUserFunc()
+        Deprecation::withSuppressedNotice(function () {
+            call_user_func([$this, 'myDeprecatedMethod']);
+        });
+        // classWithSuppressedNotice()
+        $class = DeprecationTestObject::class;
+        new $class();
+        // classWithInjectorwithSuppressedNotice()
+        Injector::inst()->get(DeprecationTestObject::class);
+        // Output notices - there should be none
+        Deprecation::outputNotices();
+    }
+
     // The following tests would be better to put in the silverstripe/config module, however this is not
     // possible to do in a clean way as the config for the DeprecationTestObject will not load if it
     // is inside the silverstripe/config directory, as there is no _config.php file or _config folder.
@@ -232,7 +317,7 @@ class DeprecationTest extends SapphireTest
         ]);
         $this->expectException(DeprecationTestException::class);
         $this->expectExceptionMessage($message);
-        Deprecation::enable();
+        $this->enableDeprecationNotices();
         Config::inst()->get(DeprecationTestObject::class, 'first_config');
         Deprecation::outputNotices();
     }
@@ -245,7 +330,7 @@ class DeprecationTest extends SapphireTest
         ]);
         $this->expectException(DeprecationTestException::class);
         $this->expectExceptionMessage($message);
-        Deprecation::enable();
+        $this->enableDeprecationNotices();
         Config::inst()->get(DeprecationTestObject::class, 'second_config');
         Deprecation::outputNotices();
     }
@@ -255,7 +340,7 @@ class DeprecationTest extends SapphireTest
         $message = 'Config SilverStripe\Dev\Tests\DeprecationTest\DeprecationTestObject.third_config is deprecated.';
         $this->expectException(DeprecationTestException::class);
         $this->expectExceptionMessage($message);
-        Deprecation::enable();
+        $this->enableDeprecationNotices();
         Config::inst()->get(DeprecationTestObject::class, 'third_config');
         Deprecation::outputNotices();
     }
@@ -268,7 +353,7 @@ class DeprecationTest extends SapphireTest
         ]);
         $this->expectException(DeprecationTestException::class);
         $this->expectExceptionMessage($message);
-        Deprecation::enable();
+        $this->enableDeprecationNotices();
         Config::modify()->set(DeprecationTestObject::class, 'first_config', 'abc');
         Deprecation::outputNotices();
     }
@@ -281,7 +366,7 @@ class DeprecationTest extends SapphireTest
         ]);
         $this->expectException(DeprecationTestException::class);
         $this->expectExceptionMessage($message);
-        Deprecation::enable();
+        $this->enableDeprecationNotices();
         Config::modify()->merge(DeprecationTestObject::class, 'array_config', ['abc']);
         Deprecation::outputNotices();
     }
@@ -361,7 +446,7 @@ class DeprecationTest extends SapphireTest
         switch ($varName) {
             case 'SS_DEPRECATION_ENABLED':
                 if ($configVal) {
-                    Deprecation::enable();
+                    $this->enableDeprecationNotices();
                 } else {
                     Deprecation::disable();
                 }
@@ -533,7 +618,7 @@ class DeprecationTest extends SapphireTest
     private function setEnabledViaStatic(bool $enabled): void
     {
         if ($enabled) {
-            Deprecation::enable();
+            $this->enableDeprecationNotices();
         } else {
             Deprecation::disable();
         }