KMValidator.php

<?php
/**
 * @author kofimokome
 */
if ( ! class_exists( 'KMValidator' ) ) {

	#[AllowDynamicProperties]
	class KMValidator {
		private $rules = [];
		private $data = [];

		public function __call( $method, $arguments ) {

			if ( $method == 'validate' ) {
				return $this->validateData( ...$arguments );
			} else {
				return $this->$method( ...$arguments );
			}
		}

		public static function __callStatic( $method, $arguments ) {
			$instance = new KMValidator();

			switch($method){
				case 'make':
					return $instance->makeRules( ...$arguments );
					break;
				case 'validate':
					return $instance->validateData( ...$arguments );
					break;
				default:
					return $instance->$method( ...$arguments );
					break;
			}
		}

		/**
		 * @since  1.0.0
		 * Creates a validator request
		 * Rules: required, bool, int, numeric, pdf
		 * @author kofimokome
		 */
		private function makeRules( $rules, $data ): KMValidator {
			$this->rules = $rules;
			$this->data  = $data;

			return $this;
		}

		private function isFile( $data ): bool {
			if ( is_array( $data ) && isset( $data['type'] ) && isset( $data['name'] ) && isset( $data['size'] ) && isset( $data['tmp_name'] ) ) {
				return true;
			}

			return false;
		}

		/**
		 * @since  1.0.0
		 * Validates request
		 * Rules: required, bool, int, numeric, pdf
		 * @author kofimokome
		 */
		public function validateData( $rules = [], $data = [] ): bool|array {

			if ( sizeof( $rules ) == 0 ) {
				$rules = $this->rules;
			}
			if ( sizeof( $data ) == 0 ) {
				$data = $this->data;
			}
			foreach ( $rules as $field => $rule ) {
				$rules_to_check = explode( '|', $rule );
				$rules_to_check = array_filter( $rules_to_check, function ( $a ) {
					return strlen( $a ) > 0;
				} );
				foreach ( $rules_to_check as $rule_to_check ) {
					switch ( $rule_to_check ) {
						case 'required':
							if ( ! isset( $data[ $field ] ) || ( isset( $data[ $field ] ) && ( ( ! is_array( $data[ $field ] ) && trim( $data[ $field ] ) == '' ) || ( is_array( $data[ $field ] ) && sizeof( $data[ $field ] ) == 0 ) ) ) ) {
								wp_send_json_error( $field . ' is required', 400 );

								return false;
							}
//						$data[ $field ] = trim( $data[ $field ] );
							break;
						case 'int':
							if ( isset( $data[ $field ] ) && ! is_integer( $data[ $field ] ) ) {
								wp_send_json_error( $field . ' must be an integer', 400 );

								return false;
							}
//						$data[ $field ] = intval( $data[ $field ] );
							break;
						case 'numeric':
							if ( isset( $data[ $field ] ) && ! is_numeric( $data[ $field ] ) ) {
								wp_send_json_error( $field . ' must be a numeric value', 400 );

								return false;
							}

							break;

						case 'bool':
							if ( isset( $data[ $field ] ) && ( ! is_bool( $data[ $field ] ) && ( $data[ $field ] != 'true' && $data[ $field ] != 'false' ) ) ) {
								wp_send_json_error( $field . ' must be a boolean value', 400 );

								return false;
							}
							/*if ( $data[ $field ] == 'true' ) {
								$data[ $field ] = 1;
							} elseif ( $data[ $field ] == 'false' ) {
								$data[ $field ] = 0;
							} else {
								$data[ $field ] = (bool) $data[ $field ];
							}*/
							break;

						case 'pdf':
							if ( isset( $data[ $field ] ) ) {
								if ( self::isFile( $data[ $field ] ) ) {
									if ( $data[ $field ]['type'] != 'application/pdf' ) {
										wp_send_json_error( $field . ' must be a pdf file', 400 );

										return false;
									}
								} else {
									wp_send_json_error( $field . ' must be a file', 400 );

									return false;
								}
							}
							break;
					}
				}
			}

//		return $data;
			$this->rules = [];
			$this->data  = [];

			return $data;
		}
	}
}