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#pragma once
#include <set>
#include <sstream>
#include <string>
#include <string_view>
#include <thread>
class ApexUpdateListener {
private:
struct Sigil {};
public:
// Information extracted from updated /apex/apex-info-list.xml
struct Info {
std::string module_name;
std::string module_path;
std::string preinstalled_module_path;
int64_t version_code;
std::string version_name;
bool is_factory;
bool is_active;
auto AsTuple() const {
return std::make_tuple(is_active, is_factory, version_code, version_name,
module_path, preinstalled_module_path, module_name);
}
bool operator<(const Info& other) const {
return AsTuple() < other.AsTuple();
}
bool operator==(const ApexUpdateListener::Info& other) const {
return !(other < *this) && !(*this < other);
}
bool operator!=(const ApexUpdateListener::Info& other) const {
return !(*this == other);
}
template <typename T>
friend auto& operator<<(T& stream, const ApexUpdateListener::Info& i) {
return stream << "{ moduleName: " << i.module_name
<< ", modulePath: " << i.module_path
<< ", preinstalledModulePath: " << i.preinstalled_module_path
<< ", versionCode: " << i.version_code
<< ", versionName: " << i.version_name
<< ", i.isFactory: " << i.is_factory
<< ", i.isActive: " << i.is_active << " }";
}
template <typename T>
friend auto& operator<<(T& stream,
const std::set<ApexUpdateListener::Info>& s) {
stream << "{";
std::string sep = "";
for (auto& i : s) {
stream << sep << i;
sep = ", ";
}
return stream << "}";
}
};
using CallbackFunction =
std::function<void(const std::set<Info>& last_versions,
const std::set<Info>& current_versions)>;
ApexUpdateListener(Sigil, const std::string& apex_name,
const std::string& apex_info_list_file_name,
CallbackFunction callback, int fd, int wd,
const std::set<Info>& last_info);
static std::unique_ptr<ApexUpdateListener> Make(
const std::string& apex_name, CallbackFunction callback,
bool invoke_with_initial_version = false,
const std::string& apex_info_list_file_name = "/apex/apex-info-list.xml");
// We need some cleanup handling
~ApexUpdateListener();
private:
const std::string apex_name_;
const std::string apex_info_list_file_name_;
const CallbackFunction callback_function_;
std::atomic<bool> running_ = true;
int file_descriptor_ = -1;
int watch_descriptor_ = -1;
std::set<Info> last_info_;
std::thread thread_;
void ThreadFunction();
static std::optional<std::set<Info>> TrySlurpInfo(
const std::string& apex_name, const std::string& apex_info_list_file_name);
};
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