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/*
* This file is part of smolbote. It's copyrighted by the contributors recorded
* in the version control history of the file, available from its original
* location: https://neueland.iserlohn-fortress.net/gitea/aqua/smolbote
*
* SPDX-License-Identifier: GPL-3.0
*/
#include "configuration.h"
#include <algorithm>
#include <fstream>
#include <iostream>
#include <stdexcept>
#ifndef NO_QT_SPEC
#include <QStandardPaths>
#endif
static const Configuration *s_conf = nullptr;
Configuration::Configuration()
: use_global(true)
{
if(s_conf == nullptr) {
throw std::runtime_error("Trying to use default Configuration, but none has been set!");
}
}
Configuration::Configuration(const std::initializer_list<std::pair<std::string, conf_value_t>> &list) noexcept
#ifndef NO_QT_SPEC
: m_homePath(QStandardPaths::writableLocation(QStandardPaths::HomeLocation).toStdString())
#endif
{
for(const auto &i : list) {
insert_or_assign(i.first, i.second);
}
}
void Configuration::read_file(const std::string &location)
{
std::fstream fs(location, std::fstream::in);
if(fs.is_open()) {
read(fs);
fs.close();
}
}
inline auto strip(std::string &value)
{
value.erase(value.begin(), std::find_if(value.begin(), value.end(), std::bind1st(std::not_equal_to<char>(), ' ')));
value.erase(std::find_if(value.rbegin(), value.rend(), std::bind1st(std::not_equal_to<char>(), ' ')).base(), value.end());
return value;
}
enum parse_result {
None,
Pair,
Section,
Include,
};
inline auto parse(const std::string &line, const std::string §ion)
{
struct {
parse_result result = None;
std::string key;
std::string value;
} ret;
if(line.front() == '#' || line.length() == 0) {
return ret;
}
if(line.starts_with("@@")) {
if(line.starts_with("@@include ")) {
ret.result = parse_result::Include;
ret.key = line.substr(10);
}
return ret;
}
if(line.front() == '[' && line.back() == ']') {
ret.result = parse_result::Section;
ret.key = line.substr(1, line.length() - 2) + '/';
return ret;
}
const auto pos = line.find_first_of('=');
if(pos == std::string::npos) {
return ret;
}
ret.key = line.substr(0, pos);
strip(ret.key);
if(ret.key.empty()) {
return ret;
}
ret.key = section + ret.key;
ret.value = line.substr(pos + 1);
strip(ret.value);
ret.result = parse_result::Pair;
return ret;
}
#ifdef FUZZER
extern "C" int LLVMFuzzerTestOneInput(const char *Data, long long Size)
{
std::string section;
parse(std::string(Data, static_cast<unsigned long>(Size)), section);
return 0;
}
#endif
void Configuration::read(std::basic_istream<char> &input)
{
std::string line, section;
while(std::getline(input, line)) {
const auto p = parse(line, section);
switch(p.result) {
case parse_result::None:
break;
case parse_result::Section:
section = p.key;
break;
case parse_result::Include:
read_file(p.key);
break;
case parse_result::Pair:
setValue(p.key, p.value);
break;
}
}
}
void Configuration::setValue(const std::string &key, const std::string &value)
{
if(use_global) {
throw std::runtime_error("Global configuration is read-only!");
}
if(this->count(key) == 0) {
insert(std::make_pair(key, value));
} else {
auto v = at(key);
if(std::holds_alternative<std::string>(v)) {
at(key) = value;
} else if(std::holds_alternative<int>(v)) {
at(key) = std::stoi(value);
} else if(std::holds_alternative<bool>(v)) {
at(key) = (value == "true");
}
}
}
bool Configuration::make_global()
{
if(use_global || s_conf != nullptr) {
return false;
}
s_conf = this;
return true;
}
const Configuration *Configuration::instance()
{
return s_conf;
}
std::ostream &operator<<(std::ostream &out, const Configuration &obj param_typestate(unconsumed))
{
if(obj.use_global) {
out << *s_conf;
return out;
}
// unordered_map is, well, unordered, so grab the keys and sort them before printing them
std::vector<std::string> keys;
for(const auto &pair : obj) {
keys.emplace_back(pair.first);
}
std::sort(keys.begin(), keys.end());
for(const auto &key : keys) {
out << key << "=" << obj.value<std::string>(key.c_str()).value() << "\n";
}
return out;
}
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