api/src/Checks.php

<?php

use Symfony\Component\HttpFoundation\Request;

class Checks
{
    public $filters = "filters";

    /**
     * Throws exception if not integer.
     * @param Request|array $all Contains array with query.
     * @param string $property Contains the name of property
     * @param boolean $required Check if property exists in request
     * @param mixed $default Default value.
     * @return string Return string or if the property not exists.
     * @throws Error Throws errors.
     */
    function string($all, $property, $required = true, $default = null)
    {
        if ($all != null) {
            if ($all instanceof Request) {
                $all = $all->query->all();
            }
            $key_exists = array_key_exists($property, $all);
            if (!$key_exists && $default != null) {
                $all[$property] = $default;
                $key_exists = true;
            }
            if (!$key_exists) {
                if ($required) {
                    throw (new Errors())->errorRequired($property, "string");
                } else {
                    // value not exists
                    return null;
                }
            } else if (is_string($all[$property])) {
                return $all[$property];
            } else {
                throw (new Errors())->errorString($property);
            }
        } else {
            return null;
        }
    }

    /**
     * Throws exception if not integer.
     * @param Request|array $all Contains array with query.
     * @param string $property Contains the name of property
     * @param boolean $required Check if property exists in request
     * @param mixed $default Default value.
     * @return Integer Return integer or if the property not exists.
     * @throws Error Throws errors.
     */
    function integer($all, $property, $required = true, $default = null)
    {
        if ($all != null) {
            if ($all instanceof Request) {
                $all = $all->query->all();
            }
            $key_exists = array_key_exists($property, $all);
            if (!$key_exists && $default != null) {
                $all[$property] = $default;
                $key_exists = true;
            }
            if (!$key_exists) {
                if ($required) {
                    throw (new Errors())->errorRequired($property, "integer");
                } else {
                    // value not exists
                    return null;
                }
            } else if (is_numeric($all[$property])) {
                return $all[$property];
            } else {
                throw (new Errors())->errorInteger($property);
            }
        } else {
            return null;
        }
    }

    /**
     * Throws exception if not integer.
     * @param string $property Contains the name of property
     * @param string $value Value for array key
     * @return string Return strings with format 'filters[$property]=$value or null.
     * @throws Error Throws errors.
     */
    public function filters($property, $value)
    {
        if ($value != null) {
            $value = "filters[$property]=$value";
        }
        return $value;
    }

    /**
     * Throws exception if not boolean.
     * @param Request|array $all Contains array with query.
     * @param string $property Contains the name of property
     * @param boolean $required Check if property exists in request
     * @param mixed $default Default value.
     * @return integer Return integer 0, 1 or null.
     * @throws Error Throws errors.
     */
    function boolean($all, $property, $required = true, $default = null)
    {
        if ($all != null) {
            if ($all instanceof Request) {
                $all = $all->query->all();
            }
            $key_exists = array_key_exists($property, $all);
            if (!$key_exists && $default != null) {
                $all[$property] = $default;
                $key_exists = true;
            }
            if (!$key_exists) {
                if ($required) {
                    throw (new Errors())->errorRequired($property, "boolean");
                } else {
                    // value not exists
                    return null;
                }
            } else if (is_bool($all[$property]) || in_array(strtolower($all[$property]),['true','false','0','1'])) {
                $bool = filter_var( $all[$property], FILTER_VALIDATE_BOOLEAN );
                return (int)$bool;
            } else {
                throw (new Errors())->errorBoolean($property);
            }
        } else {
            return null;
        }
    }
}