<?php

declare(strict_types=1);

/** 
 * @author Robert Strutts <Robert@TryingToScale.com>
 * @copyright Copyright (c) 2022, Robert Strutts.
 * @license https://mit-license.org/
 */

namespace tts\enum;

class safer_io_enums {} // Needed to auto-load

enum HTML_FLAG {
    case raw;  // Dangerious XSS attacks...
    case strip;
    case encode;
    case purify; // Allow safe whitelisted HTML elements/tags
    case escape; // safely Escape HTML
}

enum INPUTS: int {
    case variable = 998; // User Defined VAR
    case debugging = 999; // check POST and then if debugging is set, check GET
    case json = 1000; // uses JSON on raw POST BODY
    case post = 0; // INPUT_POST;
    case get = 1; // INPUT_GET;
    case cookie = 2; //INPUT_COOKIE;
    case env = 4; // INPUT_ENV;
    case server = 5; // INPUT_SERVER;
    
    public function resolve(): int {
        return match($this) {
            self::post => INPUT_POST,
            self::get => INPUT_GET,
            self::cookie => INPUT_COOKIE,
            self::env => INPUT_ENV,
            self::server => INPUT_SERVER,
        };
    }
}

enum DB_FILTER {
    case ON; // Tries to Filter out SQL from User Input
    case OFF; // Normal pass thourgh...
}

enum FIELD_FILTER: string {
    case raw_string = "string";
    case array_of_strings = "strings";
    case email = "email-address";
    case url = "site-url";
    case raw = "unfiltered-non-sanitized";
    case integer_number = "integer";
    case array_of_ints = "integers";
    case floating_point = "float";
    case array_of_floats = "floats";
    
    public function resolve() {
        return match($this) {
            self::raw_string => FILTER_UNSAFE_RAW,
            self::array_of_strings => [
                'filter' => FILTER_UNSAFE_RAW,
                'flags' => FILTER_REQUIRE_ARRAY
            ],
            self::email => FILTER_SANITIZE_EMAIL,
            self::url => FILTER_SANITIZE_URL,
            self::raw => FILTER_DEFAULT, // Unfiltered, non-sanitized!!!
            self::integer_number => [
                'filter' => FILTER_SANITIZE_NUMBER_INT,
                'flags' => FILTER_REQUIRE_SCALAR
            ],
            self::array_of_ints => [
                'filter' => FILTER_SANITIZE_NUMBER_INT,
                'flags' => FILTER_REQUIRE_ARRAY
            ],
            self::floating_point => [
                'filter' => FILTER_SANITIZE_NUMBER_FLOAT,
                'flags' => FILTER_FLAG_ALLOW_FRACTION
            ],
            self::array_of_floats => [
                'filter' => FILTER_SANITIZE_NUMBER_FLOAT,
                'flags' => FILTER_REQUIRE_ARRAY
            ],
        };
    }
}