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#include "common.hh"
#include "xdg.hh"
#include <filesystem>
#include <pwd.h>
#include <stdlib.h>
#include <unistd.h>
namespace xdg {
namespace {
bool valid(char const* path) {
return path && path[0] == '/';
}
bool valid(std::string const& path, size_t pos, size_t len) {
return len > 0 && path[pos] == '/';
}
std::filesystem::path get_home() {
auto* env = getenv("HOME");
if (valid(env))
return env;
auto* pwd = getpwuid(getuid());
if (pwd && valid(pwd->pw_dir))
return pwd->pw_dir;
return "/";
}
void get_paths(Type type, std::string* dirs, std::filesystem::path* home) {
char const* env;
switch (type) {
case Type::CONFIG:
if (dirs) {
env = getenv("XDG_CONFIG_DIRS");
if (valid(env)) {
dirs->assign(env);
} else {
dirs->assign("/etc/xdg");
}
}
if (home) {
env = getenv("XDG_CONFIG_HOME");
if (valid(env)) {
*home = env;
} else {
*home = get_home() / ".config";
}
}
break;
case Type::DATA:
if (dirs) {
env = getenv("XDG_DATA_DIRS");
if (valid(env)) {
dirs->assign(env);
} else {
dirs->assign("usr/local/share/:/usr/share/");
}
}
if (home) {
env = getenv("XDG_DATA_HOME");
if (valid(env)) {
*home = env;
} else {
*home = get_home() / ".local/share";
}
}
break;
case Type::CACHE:
if (dirs)
dirs->clear();
if (home) {
env = getenv("XDG_CACHE_HOME");
if (valid(env)) {
*home = env;
} else {
*home = get_home() / ".cache";
}
}
break;
}
}
} // namespace
void paths_to_read(Type type, std::string_view name,
std::vector<std::filesystem::path>& out) {
std::string dirs;
std::filesystem::path home;
get_paths(type, &dirs, &home);
out.clear();
out.push_back(home / name);
size_t last = 0;
while (true) {
size_t next = dirs.find(':', last);
if (next == std::string::npos) {
if (valid(dirs, last, dirs.size() - last))
out.push_back(std::filesystem::path(dirs.substr(last)) / name);
break;
}
if (valid(dirs, last, next - last))
out.push_back(
std::filesystem::path(dirs.substr(last, next - last)) / name);
last = next + 1;
}
}
std::filesystem::path path_to_write(Type type, std::string_view name) {
std::filesystem::path home;
get_paths(type, nullptr, &home);
return home / name;
}
} // namespace xdg
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