feat: coerce bool primitive from strings

src/Rules.php

@@ -4,6 +4,8 @@
 
 	use \victorwesterlund\xEnum;
 
+	use \ReflectRules\Scope;
+
 	// Supported types for is_type()
 	enum Type {
 		use xEnum;
@@ -80,17 +82,60 @@
 			Methods are not called until all rules have been defined.
 		*/
 
-		public function eval_required(array $scope): bool {
-			return array_key_exists($this->property, $scope);
+		private function eval_type_boolean(mixed $value, Scope $scope): bool {
+			// Coerce $value to bool primitive from string for GET parameters
+			if ($scope === Scope::GET) {
+				switch ($value) {
+					case "true":
+					case "1":
+					case "on":
+					case "yes":
+						$value = true;
+						break;
+	
+					case "false":
+					case "0":
+					case "off":
+					case "no":
+						$value = false;
+						break;
+	
+					default:
+						$value = null;
+				}
+
+				// Mutate value on superglobal from string to primitive
+				$GLOBALS[$scope->value][$this->property] = $value;
+			}
+
+			return is_bool($value);
 		}
 
-		public function eval_type(mixed $value): bool {
+		/*
+			## Public eval methods
+			These are the entry-point eval methods that in turn can call other
+			helper methods for fine-graned validation.
+		*/
+
+		public function eval_required(Scope $scope): bool {
+			$scope_data = &$GLOBALS[$scope->value];
+
+			if (array_key_exists($this->property, $scope_data)) {
+				return true;
+			}
+
+			// Property does not exist in scope, create nulled superglobal for it
+			$scope_data[$this->property] = null;
+			return false;
+		}
+
+		public function eval_type(mixed $value, Scope $scope): bool {
 			return match($this->type) {
 				Type::NUMBER  => is_numeric($value),
 				Type::STRING  => is_string($value),
-				Type::BOOLEAN => is_bool($value),
-				Type::ARRAY   => is_array($value),
-				Type::OBJECT  => $this->eval_object($value),
+				Type::BOOLEAN => $this->eval_type_boolean($value, $scope),
+				Type::ARRAY,
+				Type::OBJECT  => is_array($value),
 				Type::NULL    => is_null($value),
 				default => true
 			};
@@ -115,9 +160,4 @@
 				default => true
 			};
 		}
-
-		// TODO: Recursive Rules eval of multidimensional object
-		public function eval_object(mixed $object): bool {
-			return is_array($object);
-		}
 	}

src/Ruleset.php

@@ -11,6 +11,12 @@
 
 	require_once "Rules.php";
 
+	// Available superglobal scopes
+	enum Scope: string {
+		case GET  = "_GET";
+		case POST = "_POST";
+	}
+
 	class Ruleset {
 		// This plugin will return exit with a Reflect\Response if errors are found
 		private bool $exit_on_errors;
@@ -52,14 +58,12 @@
 		}
 
 		// Evaluate Rules against a given value
-		private function eval_rules(Rules $rules, array &$scope): void {
+		private function eval_rules(Rules $rules, Scope $scope): void {
+			// Get the name of the current property being evaluated
 			$name = $rules->get_property_name();
 
 			// Check if property name exists in scope
 			if (!$rules->eval_required($scope)) {
-				// Set property name value on superglobal to null if not defined
-				$scope[$name] = null;
-
 				// Don't perform further processing if the property is optional and not provided
 				if (!$rules->required) {
 					return;
@@ -68,14 +72,15 @@
 				$this->add_error($name, "Value can not be empty");
 			}
 
-			$value = $scope[$name];
+			// Get value from scope for the current property
+			$value = $GLOBALS[$scope->value][$name];
 
 			/*
 				Eval each rule that has been set.
 				The error messages will be returned 
 			*/
 
-			if ($rules->type && !$rules->eval_type($value)) {
+			if ($rules->type && !$rules->eval_type($value, $scope)) {
 				$this->add_error($name, "Value must be of type '{$rules->type->name}'");
 			}
 
@@ -89,7 +94,7 @@
 		}
 
 		// Evaluate all Rules in this Ruleset against values in scope and return true if no errors were found
-		private function eval_all_rules(array $rules, array &$scope): bool {
+		private function eval_all_rules(array $rules, Scope $scope): bool {
 			foreach ($rules as $rule) {
 				$this->eval_rules($rule, $scope);
 			}
@@ -103,7 +108,7 @@
 		public function GET(array $rules): true|array|Response {
 			$this->eval_property_name_diff($rules, array_keys($_GET));
 
-			$is_valid = $this->eval_all_rules($rules, $_GET);
+			$is_valid = $this->eval_all_rules($rules, Scope::GET);
 
 			// Return errors as a Reflect\Response
 			if (!$is_valid && $this->exit_on_errors) {
@@ -117,7 +122,7 @@
 		public function POST(array $rules): true|array|Response {
 			$this->eval_property_name_diff($rules, array_keys($_POST));
 
-			$is_valid = $this->eval_all_rules($rules, $_POST);
+			$is_valid = $this->eval_all_rules($rules, Scope::POST);
 
 			// Return errors as a Reflect\Response
 			if (!$is_valid && $this->exit_on_errors) {