hyperion.ng/libsrc/db/DBManager.cpp

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#include <db/DBManager.h>
#include <QSqlDatabase>
#include <QSqlError>
#include <QSqlQuery>
#include <QSqlRecord>
#include <QThreadStorage>
#include <QUuid>
#include <QDir>
2020-06-17 20:55:57 +02:00
#ifdef _WIN32
#include <stdexcept>
#endif
// not in header because of linking
static QString _rootPath;
static QThreadStorage<QSqlDatabase> _databasePool;
DBManager::DBManager(QObject* parent)
: QObject(parent)
, _log(Logger::getInstance("DB"))
{
}
DBManager::~DBManager()
{
}
void DBManager::setRootPath(const QString& rootPath)
{
_rootPath = rootPath;
// create directory
QDir().mkpath(_rootPath+"/db");
}
void DBManager::setTable(const QString& table)
{
_table = table;
}
QSqlDatabase DBManager::getDB() const
{
if(_databasePool.hasLocalData())
return _databasePool.localData();
else
{
auto db = QSqlDatabase::addDatabase("QSQLITE", QUuid::createUuid().toString());
_databasePool.setLocalData(db);
db.setDatabaseName(_rootPath+"/db/"+_dbn+".db");
if(!db.open())
{
Error(_log, QSTRING_CSTR(db.lastError().text()));
throw std::runtime_error("Failed to open database connection!");
}
return db;
}
}
bool DBManager::createRecord(const VectorPair& conditions, const QVariantMap& columns) const
{
if(recordExists(conditions))
{
// if there is no column data, return
if(columns.isEmpty())
return true;
if(!updateRecord(conditions, columns))
return false;
return true;
}
QSqlDatabase idb = getDB();
QSqlQuery query(idb);
query.setForwardOnly(true);
QVariantList cValues;
QStringList prep;
QStringList placeh;
// prep merge columns & condition
QVariantMap::const_iterator i = columns.constBegin();
while (i != columns.constEnd()) {
prep.append(i.key());
cValues += i.value();
placeh.append("?");
++i;
}
for(const auto& pair : conditions)
{
// remove the condition statements
QString tmp = pair.first;
prep << tmp.remove("AND");
cValues << pair.second;
placeh.append("?");
}
query.prepare(QString("INSERT INTO %1 ( %2 ) VALUES ( %3 )").arg(_table,prep.join(", ")).arg(placeh.join(", ")));
// add column & condition values
doAddBindValue(query, cValues);
if(!query.exec())
{
Error(_log, "Failed to create record: '%s' in table: '%s' Error: %s", QSTRING_CSTR(prep.join(", ")), QSTRING_CSTR(_table), QSTRING_CSTR(idb.lastError().text()));
return false;
}
return true;
}
bool DBManager::recordExists(const VectorPair& conditions) const
{
if(conditions.isEmpty())
return false;
QSqlDatabase idb = getDB();
QSqlQuery query(idb);
query.setForwardOnly(true);
QStringList prepCond;
QVariantList bindVal;
prepCond << "WHERE";
for(const auto& pair : conditions)
{
prepCond << pair.first+"=?";
bindVal << pair.second;
}
query.prepare(QString("SELECT * FROM %1 %2").arg(_table,prepCond.join(" ")));
doAddBindValue(query, bindVal);
if(!query.exec())
{
Error(_log, "Failed recordExists(): '%s' in table: '%s' Error: %s", QSTRING_CSTR(prepCond.join(" ")), QSTRING_CSTR(_table), QSTRING_CSTR(idb.lastError().text()));
return false;
}
int entry = 0;
while (query.next()) {
entry++;
}
if(entry)
return true;
return false;
}
bool DBManager::updateRecord(const VectorPair& conditions, const QVariantMap& columns) const
{
QSqlDatabase idb = getDB();
QSqlQuery query(idb);
query.setForwardOnly(true);
QVariantList values;
QStringList prep;
// prepare columns valus
QVariantMap::const_iterator i = columns.constBegin();
while (i != columns.constEnd()) {
prep += i.key()+"=?";
values += i.value();
++i;
}
// prepare condition values
QStringList prepCond;
QVariantList prepBindVal;
if(!conditions.isEmpty())
prepCond << "WHERE";
for(const auto& pair : conditions)
{
prepCond << pair.first+"=?";
prepBindVal << pair.second;
}
query.prepare(QString("UPDATE %1 SET %2 %3").arg(_table,prep.join(", ")).arg(prepCond.join(" ")));
// add column values
doAddBindValue(query, values);
// add condition values
doAddBindValue(query, prepBindVal);
if(!query.exec())
{
Error(_log, "Failed to update record: '%s' in table: '%s' Error: %s", QSTRING_CSTR(prepCond.join(" ")), QSTRING_CSTR(_table), QSTRING_CSTR(idb.lastError().text()));
return false;
}
return true;
}
bool DBManager::getRecord(const VectorPair& conditions, QVariantMap& results, const QStringList& tColumns) const
{
QSqlDatabase idb = getDB();
QSqlQuery query(idb);
query.setForwardOnly(true);
QString sColumns("*");
if(!tColumns.isEmpty())
sColumns = tColumns.join(", ");
// prep conditions
QStringList prepCond;
QVariantList bindVal;
if(!conditions.isEmpty())
prepCond << "WHERE";
for(const auto& pair : conditions)
{
prepCond << pair.first+"=?";
bindVal << pair.second;
}
query.prepare(QString("SELECT %1 FROM %2 %3").arg(sColumns,_table).arg(prepCond.join(" ")));
doAddBindValue(query, bindVal);
if(!query.exec())
{
Error(_log, "Failed to get record: '%s' in table: '%s' Error: %s", QSTRING_CSTR(prepCond.join(" ")), QSTRING_CSTR(_table), QSTRING_CSTR(idb.lastError().text()));
return false;
}
// go to first row
query.next();
QSqlRecord rec = query.record();
for(int i = 0; i<rec.count(); i++)
{
results[rec.fieldName(i)] = rec.value(i);
}
return true;
}
bool DBManager::getRecords(QVector<QVariantMap>& results, const QStringList& tColumns) const
{
QSqlDatabase idb = getDB();
QSqlQuery query(idb);
query.setForwardOnly(true);
QString sColumns("*");
if(!tColumns.isEmpty())
sColumns = tColumns.join(", ");
query.prepare(QString("SELECT %1 FROM %2").arg(sColumns,_table));
if(!query.exec())
{
Error(_log, "Failed to get records: '%s' in table: '%s' Error: %s", QSTRING_CSTR(sColumns), QSTRING_CSTR(_table), QSTRING_CSTR(idb.lastError().text()));
return false;
}
// iterate through all found records
while(query.next())
{
QVariantMap entry;
QSqlRecord rec = query.record();
for(int i = 0; i<rec.count(); i++)
{
entry[rec.fieldName(i)] = rec.value(i);
}
results.append(entry);
}
return true;
}
bool DBManager::deleteRecord(const VectorPair& conditions) const
{
if(conditions.isEmpty())
{
Error(_log, "Oops, a deleteRecord() call wants to delete the entire table (%s)! Denied it", QSTRING_CSTR(_table));
return false;
}
if(recordExists(conditions))
{
QSqlDatabase idb = getDB();
QSqlQuery query(idb);
// prep conditions
QStringList prepCond("WHERE");
QVariantList bindValues;
for(const auto& pair : conditions)
{
prepCond << pair.first+"=?";
bindValues << pair.second;
}
query.prepare(QString("DELETE FROM %1 %2").arg(_table,prepCond.join(" ")));
doAddBindValue(query, bindValues);
if(!query.exec())
{
Error(_log, "Failed to delete record: '%s' in table: '%s' Error: %s", QSTRING_CSTR(prepCond.join(" ")), QSTRING_CSTR(_table), QSTRING_CSTR(idb.lastError().text()));
return false;
}
return true;
}
return false;
}
bool DBManager::createTable(QStringList& columns) const
{
if(columns.isEmpty())
{
Error(_log,"Empty tables aren't supported!");
return false;
}
QSqlDatabase idb = getDB();
// create table if required
QSqlQuery query(idb);
if(!tableExists(_table))
{
// empty tables aren't supported by sqlite, add one column
QString tcolumn = columns.takeFirst();
// default CURRENT_TIMESTAMP is not supported by ALTER TABLE
if(!query.exec(QString("CREATE TABLE %1 ( %2 )").arg(_table,tcolumn)))
{
Error(_log, "Failed to create table: '%s' Error: %s", QSTRING_CSTR(_table), QSTRING_CSTR(idb.lastError().text()));
return false;
}
}
// create columns if required
QSqlRecord rec = idb.record(_table);
int err = 0;
for(const auto& column : columns)
{
QStringList id = column.split(' ');
if(rec.indexOf(id.at(0)) == -1)
{
if(!createColumn(column))
{
err++;
}
}
}
if(err)
return false;
return true;
}
bool DBManager::createColumn(const QString& column) const
{
QSqlDatabase idb = getDB();
QSqlQuery query(idb);
if(!query.exec(QString("ALTER TABLE %1 ADD COLUMN %2").arg(_table,column)))
{
Error(_log, "Failed to create column: '%s' in table: '%s' Error: %s", QSTRING_CSTR(column), QSTRING_CSTR(_table), QSTRING_CSTR(idb.lastError().text()));
return false;
}
return true;
}
bool DBManager::tableExists(const QString& table) const
{
QSqlDatabase idb = getDB();
QStringList tables = idb.tables();
if(tables.contains(table))
return true;
return false;
}
bool DBManager::deleteTable(const QString& table) const
{
if(tableExists(table))
{
QSqlDatabase idb = getDB();
QSqlQuery query(idb);
if(!query.exec(QString("DROP TABLE %1").arg(table)))
{
Error(_log, "Failed to delete table: '%s' Error: %s", QSTRING_CSTR(table), QSTRING_CSTR(idb.lastError().text()));
return false;
}
}
return true;
}
void DBManager::doAddBindValue(QSqlQuery& query, const QVariantList& variants) const
{
for(const auto& variant : variants)
{
QVariant::Type t = variant.type();
switch(t)
{
case QVariant::UInt:
case QVariant::Int:
case QVariant::Bool:
query.addBindValue(variant.toInt());
break;
case QVariant::Double:
query.addBindValue(variant.toFloat());
break;
case QVariant::ByteArray:
query.addBindValue(variant.toByteArray());
break;
default:
query.addBindValue(variant.toString());
break;
}
}
}