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/* Copyright (c) 2015 Stanislaw Halik
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*/
#pragma once
#include "plugin-api.hpp"
#include "options/options.hpp"
#include <QWidget>
#include <QDebug>
#include <QString>
#include <QLibrary>
#include <QFrame>
#include <QList>
#include <cstdio>
#include <cinttypes>
#include <iostream>
#include <algorithm>
#include <QCoreApplication>
#include <QFile>
#include <QDir>
#include <QList>
#include <QStringList>
#if defined(__APPLE__)
# define OPENTRACK_SOLIB_EXT "dylib"
#elif defined(_WIN32)
# define OPENTRACK_SOLIB_EXT "dll"
#else
# define OPENTRACK_SOLIB_EXT "so"
#endif
#include <iostream>
#ifdef _MSC_VER
# define OPENTRACK_SOLIB_PREFIX ""
#else
# define OPENTRACK_SOLIB_PREFIX ""
#endif
extern "C" typedef void* (*OPENTRACK_CTOR_FUNPTR)(void);
extern "C" typedef Metadata* (*OPENTRACK_METADATA_FUNPTR)(void);
struct dylib final {
enum Type : unsigned { Filter, Tracker, Protocol, Invalid = 0xcafebabeU };
dylib(const QString& filename, Type t) :
type(Invalid),
filename(filename),
Dialog(nullptr),
Constructor(nullptr),
Meta(nullptr),
handle(nullptr)
{
// otherwise dlopen opens the calling executable
if (filename.size() == 0)
return;
handle.setFileName(filename);
handle.setLoadHints(QLibrary::DeepBindHint | QLibrary::LoadHint::ResolveAllSymbolsHint);
if (check(!handle.load()))
return;
if (check((Dialog = (OPENTRACK_CTOR_FUNPTR) handle.resolve("GetDialog"), !Dialog)))
return;
if (check((Constructor = (OPENTRACK_CTOR_FUNPTR) handle.resolve("GetConstructor"), !Constructor)))
return;
if (check((Meta = (OPENTRACK_METADATA_FUNPTR) handle.resolve("GetMetadata"), !Meta)))
return;
auto m = mem<Metadata>(Meta());
icon = m->icon();
name = m->name();
type = t;
}
~dylib()
{
if (handle.isLoaded())
{
const bool success = handle.unload();
if (!success)
qDebug() << "can't unload dylib" << filename << handle.errorString();
}
}
static QList<mem<dylib>> enum_libraries(const QString& library_path)
{
const char* filters_n[] = { OPENTRACK_SOLIB_PREFIX "opentrack-filter-*." OPENTRACK_SOLIB_EXT,
OPENTRACK_SOLIB_PREFIX "opentrack-tracker-*." OPENTRACK_SOLIB_EXT,
OPENTRACK_SOLIB_PREFIX "opentrack-proto-*." OPENTRACK_SOLIB_EXT,
};
const Type filters_t[] = { Filter, Tracker, Protocol };
QDir settingsDir(library_path);
QList<mem<dylib>> ret;
for (int i = 0; i < 3; i++)
{
QString glob = filters_n[i];
Type t = filters_t[i];
QStringList filenames = settingsDir.entryList(QStringList { glob }, QDir::Files, QDir::Name);
for (const QString& filename : filenames)
{
QIcon icon;
QString longName;
auto lib = std::make_shared<dylib>(library_path + filename, t);
if (!get_metadata(lib, longName, icon))
continue;
if (std::any_of(ret.cbegin(),
ret.cend(),
[&](mem<dylib> a) {return a->type == lib->type && a->name == lib->name;}))
{
qDebug() << "Duplicate lib" << lib->filename;
continue;
}
ret.push_back(lib);
}
}
return ret;
}
Type type;
QString filename;
QIcon icon;
QString name;
OPENTRACK_CTOR_FUNPTR Dialog;
OPENTRACK_CTOR_FUNPTR Constructor;
OPENTRACK_METADATA_FUNPTR Meta;
private:
QLibrary handle;
bool check(bool fail)
{
if (fail)
{
if (handle.isLoaded())
(void) handle.unload();
Constructor = nullptr;
Dialog = nullptr;
Meta = nullptr;
type = Invalid;
}
return fail;
}
static bool get_metadata(mem<dylib> lib, QString& name, QIcon& icon)
{
Metadata* meta;
if (!lib->Meta || ((meta = lib->Meta()), !meta))
return false;
name = meta->name();
icon = meta->icon();
delete meta;
return true;
}
};
struct Modules final
{
Modules(const QString& library_path) :
module_list(dylib::enum_libraries(library_path)),
filter_modules(filter(dylib::Filter)),
tracker_modules(filter(dylib::Tracker)),
protocol_modules(filter(dylib::Protocol))
{}
QList<mem<dylib>>& filters() { return filter_modules; }
QList<mem<dylib>>& trackers() { return tracker_modules; }
QList<mem<dylib>>& protocols() { return protocol_modules; }
private:
QList<mem<dylib>> module_list;
QList<mem<dylib>> filter_modules;
QList<mem<dylib>> tracker_modules;
QList<mem<dylib>> protocol_modules;
template<typename t>
static void sort(QList<t>& xs)
{
std::sort(xs.begin(), xs.end(), [&](const t& a, const t& b) { return a->name.toLower() < b->name.toLower(); });
}
QList<mem<dylib>> filter(dylib::Type t)
{
QList<mem<dylib>> ret;
for (auto x : module_list)
if (x->type == t)
ret.push_back(x);
sort(ret);
return ret;
}
};
template<typename t>
mem<t> make_dylib_instance(mem<dylib> lib)
{
mem<t> ret;
if (lib != nullptr && lib->Constructor)
ret = mem<t>(reinterpret_cast<t*>(reinterpret_cast<OPENTRACK_CTOR_FUNPTR>(lib->Constructor)()));
return ret;
}
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