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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
#include "sqlstatementbuilder.h"
#include "sqlstatementbuilderexception.h"
#include <utils/smallstringvector.h>
#include <algorithm>
namespace Sqlite {
SqlStatementBuilder::SqlStatementBuilder(Utils::SmallStringView sqlTemplate)
: m_sqlTemplate(std::move(sqlTemplate))
{
}
void SqlStatementBuilder::bindEmptyText(Utils::SmallString &&name)
{
clearSqlStatement();
checkIfPlaceHolderExists(name);
changeBinding(std::move(name), {});
}
void SqlStatementBuilder::bind(Utils::SmallString &&name, Utils::SmallString &&text)
{
clearSqlStatement();
checkBindingTextIsNotEmpty(text);
checkIfPlaceHolderExists(name);
changeBinding(std::move(name), std::move(text));
}
void SqlStatementBuilder::bind(Utils::SmallString &&name, const Utils::SmallStringVector &textVector)
{
clearSqlStatement();
checkBindingTextVectorIsNotEmpty(textVector);
checkIfPlaceHolderExists(name);
changeBinding(std::move(name), textVector.join(", "));
}
void SqlStatementBuilder::bind(Utils::SmallString &&name, int value)
{
clearSqlStatement();
checkIfPlaceHolderExists(name);
changeBinding(std::move(name), Utils::SmallString::number(value));
}
namespace {
Utils::SmallStringVector integerVectorToStringVector(const std::vector<int> &integerVector)
{
Utils::SmallStringVector stringVector;
stringVector.reserve(integerVector.size());
std::transform(integerVector.begin(),
integerVector.end(),
std::back_inserter(stringVector),
[] (int i) { return Utils::SmallString::number(i); });
return stringVector;
}
}
void SqlStatementBuilder::bind(Utils::SmallString &&name, const std::vector<int> &integerVector)
{
clearSqlStatement();
checkBindingIntegerVectorIsNotEmpty(integerVector);
checkIfPlaceHolderExists(name);
changeBinding(std::move(name), integerVectorToStringVector(integerVector).join(", "));
}
void SqlStatementBuilder::bindWithInsertTemplateParameters(Utils::SmallString &&name,
const Utils::SmallStringVector &columns)
{
clearSqlStatement();
checkBindingTextVectorIsNotEmpty(columns);
checkIfPlaceHolderExists(name);
changeBinding(std::move(name), insertTemplateParameters(columns));
}
void SqlStatementBuilder::bindWithUpdateTemplateParameters(Utils::SmallString &&name,
const Utils::SmallStringVector &columns)
{
clearSqlStatement();
checkBindingTextVectorIsNotEmpty(columns);
checkIfPlaceHolderExists(name);
changeBinding(std::move(name), updateTemplateParameters(columns));
}
void SqlStatementBuilder::bindWithUpdateTemplateNames(Utils::SmallString &&name,
const Utils::SmallStringVector &columns)
{
clearSqlStatement();
checkBindingTextVectorIsNotEmpty(columns);
checkIfPlaceHolderExists(name);
changeBinding(std::move(name), updateTemplateNames(columns));
}
void SqlStatementBuilder::clear()
{
m_bindings.clear();
m_sqlStatement.clear();
}
Utils::SmallString SqlStatementBuilder::insertTemplateParameters(const Utils::SmallStringVector &columns)
{
const Utils::SmallStringVector templateParamters(columns.size(), "?");
return templateParamters.join(", ");
}
Utils::SmallString SqlStatementBuilder::updateTemplateParameters(const Utils::SmallStringVector &columns)
{
Utils::SmallString templateParamters = columns.join("=?, ");
templateParamters.append("=?");
return templateParamters;
}
Utils::SmallString SqlStatementBuilder::updateTemplateNames(const Utils::SmallStringVector &columns)
{
Utils::SmallStringVector templateNames;
templateNames.reserve(columns.size());
auto convertToTemplateNames = [] (const Utils::SmallString &column) {
return Utils::SmallString::join({column, "=@", column});
};
std::transform(columns.begin(),
columns.end(),
std::back_inserter(templateNames),
convertToTemplateNames);
return templateNames.join(", ");
}
void SqlStatementBuilder::sortBindings() const
{
std::sort(m_bindings.begin(), m_bindings.end(), [] (const BindingPair &lhs,const BindingPair &rhs)
{
return lhs.first.size() == rhs.first.size() ? lhs.first < rhs.first : lhs.first.size() > rhs.first.size();
});
}
Utils::SmallStringView SqlStatementBuilder::sqlStatement() const
{
if (!isBuild())
generateSqlStatement();
return m_sqlStatement;
}
bool SqlStatementBuilder::isBuild() const
{
return m_sqlStatement.hasContent();
}
void SqlStatementBuilder::generateSqlStatement() const
{
m_sqlStatement = m_sqlTemplate;
sortBindings();
for (const auto &entry : m_bindings) {
const Utils::SmallStringView placeHolderToken = entry.first;
const Utils::SmallStringView replacementToken = entry.second;
m_sqlStatement.replace(placeHolderToken, replacementToken);
}
checkIfNoPlaceHoldersAynmoreExists();
}
void SqlStatementBuilder::changeBinding(Utils::SmallString &&name, Utils::SmallString &&text)
{
auto findBindingIterator = std::find_if(m_bindings.begin(),
m_bindings.end(),
[&] (const BindingPair &binding) {
return binding.first == name;
});
if (findBindingIterator == m_bindings.end())
m_bindings.push_back(std::make_pair(std::move(name), std::move(text)));
else
findBindingIterator->second = std::move(text);
}
void SqlStatementBuilder::clearSqlStatement()
{
m_sqlStatement.clear();
}
void SqlStatementBuilder::checkIfPlaceHolderExists(Utils::SmallStringView name) const
{
if (name.size() < 2 || !name.startsWith('$') || !m_sqlTemplate.contains(name))
throwException("SqlStatementBuilder::bind: placeholder name does not exist!", name.data());
}
void SqlStatementBuilder::checkIfNoPlaceHoldersAynmoreExists() const
{
if (m_sqlStatement.contains('$'))
throwException("SqlStatementBuilder::bind: there are still placeholder in the sql statement!", m_sqlTemplate.constData());
}
void SqlStatementBuilder::checkBindingTextIsNotEmpty(Utils::SmallStringView text) const
{
if (text.isEmpty())
throwException("SqlStatementBuilder::bind: binding text it empty!", m_sqlTemplate.constData());
}
void SqlStatementBuilder::checkBindingTextVectorIsNotEmpty(const Utils::SmallStringVector &textVector) const
{
if (textVector.empty())
throwException("SqlStatementBuilder::bind: binding text vector it empty!", m_sqlTemplate.constData());
}
void SqlStatementBuilder::checkBindingIntegerVectorIsNotEmpty(const std::vector<int> &integerVector) const
{
if (integerVector.empty())
throwException("SqlStatementBuilder::bind: binding integer vector it empty!", m_sqlTemplate.constData());
}
void SqlStatementBuilder::throwException(const char *whatHasHappened, const char *errorMessage)
{
throw SqlStatementBuilderException(whatHasHappened, errorMessage);
}
} // namespace Sqlite
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