<?php

namespace App\Validator;

/**
 * class ApiValidator.
 *
 * @author Simon Vieille <simon@deblan.fr>
 */
class ApiValidator
{
    /**
     * isValidContent
     *
     * @param string|null $content
     *
     * @return bool
     */
    public function isValidContent(? string $content): bool
    {
        $json = json_decode($content, true);

        if (!is_array($json)) {
            return false;
        }

        if (count($json) !== 2) {
            return false;
        }

        if (!isset($json['date'], $json['value'])) {
            return false;
        }

        try {
            new \DateTime($json['date']);
        } catch (\Exception $e) {
            return false;
        }

        if (filter_var($json['value'], FILTER_VALIDATE_FLOAT) === null) {
            return false;
        }

        return true;
    }
}