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#include "columndefaultpanel.h"
#include "ui_columndefaultpanel.h"
#include "parser/ast/sqlitecreatetable.h"
#include "parser/parser.h"
#include "parser/keywords.h"
#include "uiutils.h"
#include <QDebug>
ColumnDefaultPanel::ColumnDefaultPanel(QWidget *parent) :
ConstraintPanel(parent),
ui(new Ui::ColumnDefaultPanel)
{
ui->setupUi(this);
init();
}
ColumnDefaultPanel::~ColumnDefaultPanel()
{
delete ui;
}
void ColumnDefaultPanel::changeEvent(QEvent *e)
{
QWidget::changeEvent(e);
switch (e->type()) {
case QEvent::LanguageChange:
ui->retranslateUi(this);
break;
default:
break;
}
}
bool ColumnDefaultPanel::validate()
{
bool nameOk = true;
if (ui->namedCheck->isChecked() && ui->namedEdit->text().isEmpty())
nameOk = false;
bool exprOk = !ui->exprEdit->toPlainText().trimmed().isEmpty() &&
!ui->exprEdit->haveErrors();
bool exprCheckedOk = exprOk && ui->exprEdit->isSyntaxChecked();
setValidState(ui->exprEdit, exprOk, tr("Enter a default value expression."));
setValidState(ui->namedEdit, nameOk, tr("Enter a name of the constraint."));
return exprCheckedOk && nameOk;
}
bool ColumnDefaultPanel::validateOnly()
{
ui->exprEdit->checkSyntaxNow();
return validate();
}
void ColumnDefaultPanel::constraintAvailable()
{
if (constraint.isNull())
return;
readConstraint();
updateVirtualSql();
}
void ColumnDefaultPanel::storeConfiguration()
{
if (constraint.isNull())
return;
SqliteCreateTable::Column::Constraint* constr = dynamic_cast<SqliteCreateTable::Column::Constraint*>(constraint.data());
constr->type = SqliteCreateTable::Column::Constraint::DEFAULT;
SqliteExprPtr expr = parseExpression(ui->exprEdit->toPlainText());
SqliteExpr* newExpr = new SqliteExpr(*expr.data());
newExpr->setParent(constraint.data());
constr->expr = newExpr;
if (ui->namedCheck->isChecked())
constr->name = ui->namedEdit->text();
}
void ColumnDefaultPanel::init()
{
setFocusProxy(ui->exprEdit);
ui->exprEdit->setShowLineNumbers(false);
connect(ui->namedCheck, SIGNAL(toggled(bool)), this, SIGNAL(updateValidation()));
connect(ui->namedEdit, SIGNAL(textChanged(QString)), this, SIGNAL(updateValidation()));
connect(ui->exprEdit, SIGNAL(textChanged()), this, SIGNAL(updateValidation()));
connect(ui->exprEdit, SIGNAL(errorsChecked(bool)), this, SIGNAL(updateValidation()));
connect(ui->namedCheck, SIGNAL(toggled(bool)), this, SLOT(updateState()));
updateState();
}
void ColumnDefaultPanel::readConstraint()
{
SqliteCreateTable::Column::Constraint* constr = dynamic_cast<SqliteCreateTable::Column::Constraint*>(constraint.data());
if (constr->expr)
ui->exprEdit->setPlainText(constr->expr->detokenize());
else if (!constr->literalValue.isNull())
ui->exprEdit->setPlainText(constr->literalValue.toString());
if (!constr->name.isNull())
{
ui->namedCheck->setChecked(true);
ui->namedEdit->setText(constr->name);
}
}
void ColumnDefaultPanel::updateVirtualSql()
{
ui->exprEdit->setDb(db);
SqliteCreateTable::Column* column = dynamic_cast<SqliteCreateTable::Column*>(constraint->parentStatement());
SqliteCreateTable* createTable = dynamic_cast<SqliteCreateTable*>(column->parentStatement());
createTable->rebuildTokens();
TokenList tokens = createTable->tokens;
TokenList colTokens = column->tokens;
if (createTable->columns.indexOf(column) == -1)
{
if (createTable->columns.size() == 0)
{
// No columns. Cannot get any context info.
return;
}
colTokens = createTable->columns.last()->tokens;
}
if (colTokens.size() == 0)
{
qWarning() << "CREATE TABLE tokens are invalid (0) while call to ColumnDefaultPanel::updateVirtualSql().";
return;
}
int idx = tokens.lastIndexOf(colTokens.last());
if (idx == -1)
{
qWarning() << "CREATE TABLE tokens are invalid while call to ColumnDefaultPanel::updateVirtualSql().";
return;
}
idx++;
TokenList newTokens;
newTokens << TokenPtr::create(Token::SPACE, " ")
<< TokenPtr::create(Token::KEYWORD, "DEFAULT")
<< TokenPtr::create(Token::SPACE, " ");
if (constraint->dialect == Dialect::Sqlite3)
{
newTokens << TokenPtr::create(Token::PAR_LEFT, "(")
<< TokenPtr::create(Token::OTHER, "%1")
<< TokenPtr::create(Token::PAR_RIGHT, ")");
}
else
{
newTokens << TokenPtr::create(Token::OTHER, "%1");
}
tokens.insert(idx, newTokens);
QString sql = tokens.detokenize();
ui->exprEdit->setVirtualSqlExpression(sql);
}
SqliteExprPtr ColumnDefaultPanel::parseExpression(const QString& sql)
{
Parser parser(db->getDialect());
if (!parser.parse("SELECT "+sql))
return SqliteExprPtr();
QList<SqliteQueryPtr> queries = parser.getQueries();
if (queries.size() == 0)
return SqliteExprPtr();
SqliteQueryPtr first = queries.first();
if (first->queryType != SqliteQueryType::Select)
return SqliteExprPtr();
SqliteSelectPtr select = first.dynamicCast<SqliteSelect>();
if (select->coreSelects.size() < 1)
return SqliteExprPtr();
SqliteSelect::Core* core = select->coreSelects.first();
if (core->resultColumns.size() < 1)
return SqliteExprPtr();
SqliteSelect::Core::ResultColumn* resCol = core->resultColumns.first();
if (!resCol->expr)
return SqliteExprPtr();
return resCol->expr->detach().dynamicCast<SqliteExpr>();
}
void ColumnDefaultPanel::updateState()
{
ui->namedEdit->setEnabled(ui->namedCheck->isChecked());
}
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