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/* Copyright (c) 2016, Stanislaw Halik <sthalik@misaki.pl>
* 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.
*/
#include <cstdlib>
#include "migration.hpp"
#include "options/options.hpp"
#include <QString>
#include <QSettings>
#include <QChar>
#include <QDebug>
#include <memory>
// individual migrations are run in the UI thread. they can be interactive if necessary.
namespace migrations {
namespace detail {
static std::vector<mptr> migration_list;
static std::vector<mfun> migration_thunks;
void migrator::register_migration(mptr const& m)
{
const QString date = m->unique_date();
for (mptr const& m2 : migration_list)
if (m2->unique_date() == date)
std::abort();
if (date.size() != 11)
abort();
if (date[8] != QChar('_'))
abort();
const QString year = date.left(4);
const QString month = date.mid(4, 2);
const QString day = date.mid(6, 2);
const QString serial = date.mid(9, 2);
bool ok = true;
if (year < "2016")
abort();
const int month_ = to_int(month, ok), day_ = to_int(day, ok);
(void) to_int(year, ok);
(void) to_int(serial, ok);
if (!ok)
abort();
if (month_ < 1 || month_ > 12)
abort();
if (day_ < 1 || day_ > 31)
abort();
migration_list.push_back(m);
}
void migrator::eval_thunks()
{
for (auto& fun : migration_thunks)
{
mptr m = fun();
register_migration(m);
}
if (!migration_thunks.empty())
sort_migrations();
migration_thunks.clear();
}
void migrator::add_migration_thunk(mfun& thunk)
{
migration_thunks.push_back(thunk);
}
std::vector<mptr>& migrator::migrations()
{
eval_thunks();
return migration_list;
}
void migrator::sort_migrations()
{
std::sort(migration_list.begin(), migration_list.end(),
[](const mptr x, const mptr y) {
return x->unique_date() < y->unique_date();
});
}
QString migrator::last_migration_time()
{
QString ret;
options::group::with_settings_object([&](QSettings& s) {
s.beginGroup("migrations");
ret = s.value("last-migration-at", "19700101_00").toString();
s.endGroup();
});
return ret;
}
QString migrator::time_after_migrations()
{
const std::vector<mptr>& list = migrations();
if (list.empty())
return QStringLiteral("19700101_00");
QString ret = list[list.size() - 1]->unique_date();
ret += QStringLiteral("~");
return ret;
}
void migrator::set_last_migration_time(const QString& val)
{
options::group::with_settings_object([&](QSettings& s) {
s.beginGroup("migrations");
const QString old_value = s.value("last-migration-at", "").toString();
if (val != old_value)
{
s.setValue("last-migration-at", val);
options::group::mark_ini_modified();
}
s.endGroup();
});
}
int migrator::to_int(const QString& str, bool& ok)
{
bool tmp = false;
const int ret = int(str.toUInt(&tmp));
ok &= tmp;
return ret;
}
std::vector<QString> migrator::run()
{
std::vector<QString> done;
const QString last_migration = last_migration_time();
options::group::with_global_settings_object([&](QSettings&) {
options::group::with_settings_object([&](QSettings&) {
for (mptr m : migrations())
{
const QString date = m->unique_date();
if (date <= last_migration)
continue;
if (m->should_run())
{
const QByteArray name = m->name().toUtf8();
const QByteArray date = m->unique_date().toUtf8();
qDebug() << "migrate:" << date.constData() << name.constData();
m->run();
done.push_back(m->name());
}
}
mark_config_as_not_needing_migration();
});
});
return done;
}
}
} // ns
std::vector<QString> run_migrations()
{
return migrations::detail::migrator::run();
}
void mark_config_as_not_needing_migration()
{
using m = migrations::detail::migrator;
m::mark_config_as_not_needing_migration();
}
void migrations::detail::migrator::mark_config_as_not_needing_migration()
{
set_last_migration_time(time_after_migrations());
}
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