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#include "dbattacherimpl.h"
#include "db/db.h"
#include "db/sqlquery.h"
#include "services/dbmanager.h"
#include "parser/parser.h"
#include "services/notifymanager.h"
#include "common/utils_sql.h"
#include <QDebug>
DbAttacherImpl::DbAttacherImpl(Db* db)
{
this->db = db;
}
bool DbAttacherImpl::attachDatabases(const QString& query)
{
Parser parser;
if (!parser.parse(query))
return false;
queries = parser.getQueries();
return attachDatabases();
}
bool DbAttacherImpl::attachDatabases(const QList<SqliteQueryPtr>& queries)
{
this->queries = queries;
return attachDatabases();
}
bool DbAttacherImpl::attachDatabases(SqliteQueryPtr query)
{
queries.clear();
queries << query;
return attachDatabases();
}
void DbAttacherImpl::detachDatabases()
{
detachAttached();
}
bool DbAttacherImpl::attachDatabases()
{
dbNameToAttach.clear();
prepareNameToDbMap();
BiStrHash nativePathToAttachName = getNativePathToAttachName();
TokenList dbTokens = filter<TokenPtr>(getDbTokens(), [nativePathToAttachName](const TokenPtr& t) -> bool
{
return !nativePathToAttachName.containsRight(t->value, Qt::CaseInsensitive);
});
StrHash<TokenList> groupedDbTokens = groupDbTokens(dbTokens);
for (QString& nativeName : nativePathToAttachName.rightValues())
groupedDbTokens.remove(nativeName, Qt::CaseInsensitive);
if (!attachAllDbs(groupedDbTokens))
return false;
QHash<TokenPtr,TokenPtr> tokenMapping = getTokenMapping(dbTokens);
replaceTokensInQueries(tokenMapping);
return true;
}
TokenList DbAttacherImpl::getDbTokens()
{
TokenList dbTokens;
for (SqliteQueryPtr& query : queries)
dbTokens += query->getContextDatabaseTokens();
return dbTokens;
}
void DbAttacherImpl::detachAttached()
{
for (const QString& dbName : dbNameToAttach.leftValues())
db->detach(nameToDbMap[dbName]);
dbNameToAttach.clear();
nameToDbMap.clear();
}
void DbAttacherImpl::prepareNameToDbMap()
{
for (Db* db : DBLIST->getValidDbList())
nameToDbMap[db->getName()] = db;
}
StrHash<TokenList> DbAttacherImpl::groupDbTokens(const TokenList& dbTokens)
{
// Filter out tokens of unknown databases and group results by name
StrHash<TokenList> groupedDbTokens;
QString strippedName;
for (const TokenPtr& token : dbTokens)
{
strippedName = stripObjName(token->value);
if (!nameToDbMap.contains(strippedName, Qt::CaseInsensitive))
continue;
groupedDbTokens[strippedName] += token;
}
return groupedDbTokens;
}
bool DbAttacherImpl::attachAllDbs(const StrHash<TokenList>& groupedDbTokens)
{
QString attachName;
for (const QString& dbName : groupedDbTokens.keys())
{
if (dbName.toLower() == "main")
{
mainDbNameUsed = true;
continue;
}
attachName = db->attach(nameToDbMap[dbName]);
if (attachName.isNull())
{
notifyError(QObject::tr("Could not attach database %1: %2").arg(dbName, db->getErrorText()));
detachAttached();
return false;
}
dbNameToAttach.insert(dbName, attachName);
}
return true;
}
QHash<TokenPtr, TokenPtr> DbAttacherImpl::getTokenMapping(const TokenList& dbTokens)
{
QHash<TokenPtr, TokenPtr> tokenMapping;
QString strippedName;
TokenPtr dstToken;
for (const TokenPtr& srcToken : dbTokens)
{
strippedName = stripObjName(srcToken->value);
if (strippedName.compare("main", Qt::CaseInsensitive) == 0 ||
strippedName.compare("temp", Qt::CaseInsensitive) == 0)
continue;
if (!dbNameToAttach.containsLeft(strippedName, Qt::CaseInsensitive))
{
qCritical() << "DB token to be replaced, but it's not on nameToAlias map! Token value:" << strippedName
<< "and nameToAlias map has keys:" << dbNameToAttach.leftValues();
continue;
}
dstToken = TokenPtr::create(dbNameToAttach.valueByLeft(strippedName, Qt::CaseInsensitive));
tokenMapping[srcToken] = dstToken;
}
return tokenMapping;
}
void DbAttacherImpl::replaceTokensInQueries(const QHash<TokenPtr, TokenPtr>& tokenMapping)
{
int idx;
QHashIterator<TokenPtr,TokenPtr> it(tokenMapping);
while (it.hasNext())
{
it.next();
for (SqliteQueryPtr& query : queries)
{
idx = query->tokens.indexOf(it.key());
if (idx < 0)
continue; // token not in this query, most likely in other query
query->tokens.replace(idx, it.value());
}
}
}
BiStrHash DbAttacherImpl::getNativePathToAttachName() const
{
BiStrHash nativePathToAttachName;
SqlQueryPtr res = db->exec("PRAGMA database_list");
if (res->isError())
{
qCritical() << "Failed to query existing database attachmens with PRAGMA database_list."
<< res->getErrorCode()
<< res->getErrorText();
return nativePathToAttachName;
}
QList<SqlResultsRowPtr> rows = res->getAll();
for (SqlResultsRowPtr& row : rows)
{
QString attName = row->value("name").toString();
if (attName == "main" || attName == "temp")
continue;
QString path = row->value("file").toString();
if (path.isEmpty())
continue;
nativePathToAttachName.insert(path, attName);
}
return nativePathToAttachName;
}
bool DbAttacherImpl::getMainDbNameUsed() const
{
return mainDbNameUsed;
}
BiStrHash DbAttacherImpl::getDbNameToAttach() const
{
return dbNameToAttach;
}
QString DbAttacherImpl::getQuery() const
{
QStringList queryStrings;
for (const SqliteQueryPtr& query : queries)
queryStrings << query->detokenize();
return queryStrings.join(";");
}
DbAttacher* DbAttacherDefaultFactory::create(Db* db)
{
return new DbAttacherImpl(db);
}
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