/*
 * ModSecurity, http://www.modsecurity.org/
 * Copyright (c) 2015 Trustwave Holdings, Inc. (http://www.trustwave.com/)
 *
 * You may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * If any of the files related to licensing are missing or if you have any
 * other questions related to licensing please contact Trustwave Holdings, Inc.
 * directly using the email address security@modsecurity.org.
 *
 */

#include "src/actions/transformations/url_decode.h"

#include <iostream>
#include <string>
#include <algorithm>
#include <functional>
#include <cctype>
#include <locale>
#include <cstring>

#include "modsecurity/transaction.h"
#include "src/actions/transformations/transformation.h"
#include "src/utils/decode.h"

namespace modsecurity {
namespace actions {
namespace transformations {


UrlDecode::UrlDecode(std::string action)
    : Transformation(action) {
    this->action_kind = 1;
}

std::string UrlDecode::evaluate(std::string value,
    Transaction *transaction) {
    unsigned char *val = NULL;
    int invalid_count;
    int changed;

    if (UrlDecodeInstantCache::getInstance().count(value) > 0) {
        return UrlDecodeInstantCache::getInstance().at(value);
    }

    val = (unsigned char *) malloc(sizeof(char) * value.size() + 1);
    memcpy(val, value.c_str(), value.size() + 1);
    val[value.size()] = '\0';

    int size = utils::urldecode_nonstrict_inplace(val, value.size(),
        &invalid_count, &changed);
    std::string out;

    out.append((const char *)val, size);

    free(val);

    UrlDecodeInstantCache::getInstance().cache(value, out);

    return out;
}


}  // namespace transformations
}  // namespace actions
}  // namespace modsecurity