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/*
* Copyright (c) 2024-2025 Matthias Klumpp <matthias@tenstral.net>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#pragma once
#include <vector>
#include <string>
#include <optional>
/**
* Read & write a Deb822 file.
* This is the simplest possible parser for Deb822 files.
* Unlike pkgTagFile, it retains all comments and allows for
* non-destructive editing of Deb822 files.
*/
class Deb822File
{
public:
explicit Deb822File();
bool load(const std::string &filename);
bool loadFromStream(std::istream &stream);
bool loadFromString(const std::string &content);
bool save(const std::string &filename);
[[nodiscard]] std::string lastError() const;
[[nodiscard]] size_t stanzaCount() const;
[[nodiscard]] std::optional<std::string> getFieldValue(
size_t stanzaIndex,
const std::string &field,
std::optional<std::string> defaultValue = std::nullopt);
bool updateField(size_t stanza_index, const std::string &field, const std::string &newValue);
bool deleteField(size_t stanzaIndex, const std::string &key);
bool deleteStanza(size_t index);
int duplicateStanza(size_t index);
std::string toString() const;
private:
struct Line {
std::string content;
std::string key; /// empty if comment or continuation
std::string value; /// only valid if key is non-empty
bool isContinuation = false;
[[nodiscard]] bool isField() const
{
return !key.empty();
}
};
using Stanza = std::vector<Line>;
std::string m_filename;
std::string m_lastError;
std::vector<Stanza> m_allStanzas; // all stanzas, including comment-only ones
std::vector<size_t> m_fieldStanzaIndices; // map for stanzas with fields
static bool isFieldStanza(const Stanza &stanza);
Line parseDeb822Line(const std::string &line) const;
};
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