edit_with_signature

    public function edit_with_signature($id) {
        $post_data = array_map(function($val) { return htmlspecialchars($val, ENT_QUOTES); }, $_POST);
        $signature = array_key_exists('signature', $post_data) ? $post_data['signature'] : null;

        if (empty($signature)) {
            return $this->send_error_message('Не перадана подпись (signature)');
        }

        $signature_fields = $post_data;
        unset($signature_fields['signature']);

        uksort($signature_fields, function($a, $b) {
            $a_lower = strtolower($a);
            $b_lower = strtolower($b);

            if ($a_lower == 'token') return 1;
            if ($b_lower == 'token') return -1;

            if ($a_lower == $b_lower) return 0;
            return ($a_lower > $b_lower) ? 1 : -1;
        });
        $calculated_signature = md5(http_build_query($signature_fields, '', '&', PHP_QUERY_RFC3986));
        if ($calculated_signature !== $signature) {
            return $this->send_error_message('Неверная подпись - ожидается ' . $calculated_signature);
        }

        if ($post_data['token'] !== \Bingo\Config::get('config', 'token')) {
            return $this->send_error_message('Неверный токен');
        }

        if (empty($id)) {
            return $this->send_error_message(['id' => 'Поле является обязательным']);
        }

        $task = \App\Models\Task::findOneBy(['id' => $id, 'developer' => $this->developer]);
        if (!$task) {
            return $this->send_error_message(['id' => 'Задача #' . $id . ' не найдена']);
        }

        if (array_key_exists('text', $post_data) && !empty($post_data['text'])) {
            $task->text = $post_data['text'];
        }

        if (array_key_exists('status', $post_data)) {
            $task->status = !empty($post_data['status']) ? \App\Models\Task::STATUS_DONE : \App\Models\Task::STATUS_EMPTY;
        }

        $task->save();
        return $this->send_success_message();
    }