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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>
#include <variant>
#ifndef NO_QT_SPEC
#include <QStandardPaths>
#endif
using namespace std::placeholders;
static std::unique_ptr<Configuration> s_conf;
Configuration::Configuration()
: use_global(true)
{
if(!s_conf) {
throw std::runtime_error("Trying to use default Configuration, but none has been set!");
}
}
Configuration::Configuration(std::initializer_list<std::pair<std::string, conf_value_t>> p_list) noexcept
#ifndef NO_QT_SPEC
: m_homePath(QStandardPaths::writableLocation(QStandardPaths::HomeLocation).toStdString())
#endif
{
for(const auto &item : p_list) {
insert_or_assign(item);
}
}
bool Configuration::read_file(const std::string &location)
{
std::fstream fstream(location, std::fstream::in);
bool result = false;
if(fstream.is_open()) {
read(fstream);
fstream.close();
result = true;
}
return result;
}
inline auto strip(std::string &value)
{
// strip whitespace at the begining
value.erase(value.begin(), std::find_if(value.begin(), value.end(), std::bind(std::not_equal_to<>(), ' ', _1)));
// strip whitespace from the end
value.erase(std::find_if(value.rbegin(), value.rend(), std::bind(std::not_equal_to<>(), ' ', _1)).base(), value.end());
return value;
}
inline std::optional<Configuration::kv_pair> parse_line(const std::string &line, /* in/out */ std::string §ion)
{
if(line.front() == '[' && line.back() == ']') {
section = line.substr(1, line.length() - 2) + '/';
return std::nullopt;
}
const auto pos = line.find_first_of('=');
if(pos == std::string::npos) {
return std::nullopt;
}
std::string key = line.substr(0, pos);
std::string val = line.substr(pos + 1);
strip(key);
strip(val);
if(key.empty()) {
return std::nullopt;
}
key = section + key;
return std::make_optional<Configuration::kv_pair>({ key, val });
}
#ifdef FUZZER
extern "C" int LLVMFuzzerTestOneInput(const char *Data, long long Size)
{
std::string section;
parse(std::string(Data, Size), section);
return 0;
}
#endif
void Configuration::read(std::basic_istream<char> &input)
{
std::string line;
std::string section;
while(std::getline(input, line)) {
// skip empty lines and comments
if(line.length() == 0 || line[0] == '#') {
continue;
}
// include file
if(line.rfind("@@") == 0) {
if(line.rfind("@@include ") == 0) {
read_file(line.substr(10));
}
continue;
}
const auto pair = parse_line(line, section);
if(pair) {
insert_or_assign(*pair);
}
}
}
void Configuration::insert_or_assign(const Configuration::kv_pair &pair)
{
// insert
if(count(pair.first) == 0) {
insert(pair);
} else {
// when assigning we have to keep the same type
const auto old_value = at(pair.first);
if(std::holds_alternative<std::string>(old_value)) {
at(pair.first) = pair.second;
} else if(std::holds_alternative<int>(old_value)) {
at(pair.first) = std::stoi(std::get<std::string>(pair.second));
} else if(std::holds_alternative<bool>(old_value)) {
at(pair.first) = (std::get<std::string>(pair.second) == "true");
}
}
}
void Configuration::move_global(std::unique_ptr<Configuration> &&conf)
{
s_conf = std::move(conf);
}
Configuration *Configuration::instance()
{
return s_conf.get();
}
std::ostream &operator<<(std::ostream &out, const Configuration &obj)
{
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;
std::transform(obj.cbegin(), obj.cend(), std::inserter(keys, keys.end()), [](const auto &pair) { return 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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