/*  This file is part of FediBlock-backend.
 *  Copyright © 2020, 2021 tastytea <tastytea@tastytea.de>
 *
 *  This program is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU Affero General Public License as published by
 *  the Free Software Foundation, version 3.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU Affero General Public License for more details.
 *
 *  You should have received a copy of the GNU Affero General Public License
 *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#ifndef FEDIBLOCK_BACKEND_CGI_HPP
#define FEDIBLOCK_BACKEND_CGI_HPP

#include "types.hpp"

#include <cgicc/Cgicc.h>

#include <cstdint>
#include <exception>
#include <string>
#include <string_view>
#include <vector>

namespace FediBlock::cgi
{

using std::string;
using std::string_view;
using std::vector;

// Read form data from QUERY_STRING or stdin and return it as an object.
[[nodiscard]] entry_type parse_formdata();

// Split a string at commas, return a vector.
[[nodiscard]] vector<string> string_to_vector(string_view str);

/*!
 *  @brief  Read array from QUERY_STRING or stdin and return it as a vector.
 *
 *  @param name name of the argument to read.
 *  @param cgi  Reference to a cgicc:Cgicc object.
 *
 *  @since  0.1.0
 */
[[nodiscard]] vector<string> get_array(const string &name, cgicc::Cgicc &cgi);

// Return str in lowercase.
[[nodiscard]] string tolower(string_view str);

// Replace certain characters with HTML tags or entities.
string text2html(string text);

// Check if the answer matches the solution we have for the id.
bool captcha_valid(std::uint8_t id, string_view answer);

bool is_spam(const entry_type &entry);

/*!
 *  @brief  Add automatic tags.
 *
 *  Example: If tag “nazism” is present, add “fascism”.
 *
 *  @since  0.1.0
 */
void add_tags(entry_type &entry);

} // namespace FediBlock::cgi

class SpamException : public std::exception
{
public:
    // NOLINTNEXTLINE(modernize-use-nodiscard)
    const char *what() const noexcept override;
};

class CaptchaException : public std::exception
{
public:
    // NOLINTNEXTLINE(modernize-use-nodiscard)
    const char *what() const noexcept override;
};

#endif // FEDIBLOCK_BACKEND_CGI_HPP