#include "EditTableDialog.h"

#include "ui_EditTableDialog.h"

#include "sqlitetablemodel.h"

#include "sqlitedb.h"

#include <QMessageBox>

#include <QPushButton>

#include <QComboBox>

#include <QDateTime>

#include <QKeyEvent>

EditTableDialog::EditTableDialog(DBBrowserDB* db, const QString& tableName, bool createTable, QWidget* parent)

: QDialog(parent),

ui(new Ui::EditTableDialog),

pdb(db),

curTable(tableName),

m_table(tableName),

m_bNewTable(createTable),

m_sRestorePointName(sqlb::escapeIdentifier(QString("edittable_%1_save_%2").arg(curTable).arg(QDateTime::currentMSecsSinceEpoch())))

{

// Create UI

ui->setupUi(this);

ui->widgetExtension->setVisible(false);

connect(ui->treeWidget, SIGNAL(itemChanged(QTreeWidgetItem*,int)),this,SLOT(itemChanged(QTreeWidgetItem*,int)));

// Editing an existing table?

if(m_bNewTable == false)

{

// Existing table, so load and set the current layout

QString sTablesql = pdb->getObjectByName(curTable).getsql();

m_table = sqlb::Table::parseSQL(sTablesql).first;

ui->checkWithoutRowid->setChecked(m_table.isWithoutRowidTable());

populateFields();

}

// And create a savepoint

pdb->setSavepoint(m_sRestorePointName);

// Update UI

ui->editTableName->setText(curTable);

updateColumnWidth();

checkInput();

}

EditTableDialog::~EditTableDialog()

{

delete ui;

}

void EditTableDialog::keyPressEvent(QKeyEvent *evt)

{

if((evt->modifiers() & Qt::ControlModifier)

&& (evt->key() == Qt::Key_Enter || evt->key() == Qt::Key_Return))

{

emit accept();

return;

}

if(evt->key() == Qt::Key_Enter || evt->key() == Qt::Key_Return)

return;

QDialog::keyPressEvent(evt);

}

void EditTableDialog::updateColumnWidth()

{

ui->treeWidget->setColumnWidth(kName, 190);

ui->treeWidget->setColumnWidth(kType, 100);

ui->treeWidget->setColumnWidth(kNotNull, 30);

ui->treeWidget->setColumnWidth(kPrimaryKey, 30);

ui->treeWidget->setColumnWidth(kAutoIncrement, 30);

ui->treeWidget->setColumnWidth(kUnique, 30);

}

void EditTableDialog::populateFields()

{

// disconnect the itemChanged signal or the table item will

// be updated while filling the treewidget

disconnect(ui->treeWidget, SIGNAL(itemChanged(QTreeWidgetItem*,int)),

this,SLOT(itemChanged(QTreeWidgetItem*,int)));

ui->treeWidget->clear();

sqlb::FieldVector fields = m_table.fields();

foreach(sqlb::FieldPtr f, fields)

{

QTreeWidgetItem *tbitem = new QTreeWidgetItem(ui->treeWidget);

tbitem->setFlags(tbitem->flags() | Qt::ItemIsEditable);

tbitem->setText(kName, f->name());

QComboBox* typeBox = new QComboBox(ui->treeWidget);

typeBox->setProperty("column", f->name());

typeBox->setEditable(true);

typeBox->addItems(sqlb::Field::Datatypes);

int index = typeBox->findText(f->type(), Qt::MatchExactly);

if(index == -1)

{

// non standard named type

typeBox->addItem(f->type());

index = typeBox->count() - 1;

}

typeBox->setCurrentIndex(index);

connect(typeBox, SIGNAL(currentIndexChanged(int)), this, SLOT(updateTypes()));

//connect(typeBox, SIGNAL(editTextChanged(QString)), this, SLOT(updateTypes()));

ui->treeWidget->setItemWidget(tbitem, kType, typeBox);

tbitem->setCheckState(kNotNull, f->notnull() ? Qt::Checked : Qt::Unchecked);

tbitem->setCheckState(kPrimaryKey, f->primaryKey() ? Qt::Checked : Qt::Unchecked);

tbitem->setCheckState(kAutoIncrement, f->autoIncrement() ? Qt::Checked : Qt::Unchecked);

tbitem->setCheckState(kUnique, f->unique() ? Qt::Checked : Qt::Unchecked);

// For the default value check if it is surrounded by parentheses and if that's the case

// add a '=' character before the entire string to match the input format we're expecting

// from the user when using functions in the default value field.

if(f->defaultValue().startsWith('(') && f->defaultValue().endsWith(')'))

tbitem->setText(kDefault, "=" + f->defaultValue());

else

tbitem->setText(kDefault, f->defaultValue());

tbitem->setText(kCheck, f->check());

tbitem->setText(kForeignKey, f->foreignKey().toString());

ui->treeWidget->addTopLevelItem(tbitem);

}

// and reconnect

connect(ui->treeWidget, SIGNAL(itemChanged(QTreeWidgetItem*,int)),this,SLOT(itemChanged(QTreeWidgetItem*,int)));

}

void EditTableDialog::accept()

{

// Are we editing an already existing table or designing a new one? In the first case there is a table name set,

// in the latter the current table name is empty

if(m_bNewTable)

{

// Creation of new table

if(!pdb->executeSQL(m_table.sql()))

{

QMessageBox::warning(

this,

QApplication::applicationName(),

tr("Error creating table. Message from database engine:\n%1").arg(pdb->lastErrorMessage));

return;

}

} else {

// Editing of old table

// Rename table if necessary

if(ui->editTableName->text() != curTable)

{

if(!pdb->renameTable(curTable, ui->editTableName->text()))

{

QMessageBox::warning(this, QApplication::applicationName(), pdb->lastErrorMessage);

return;

}

}

}

QDialog::accept();

}

void EditTableDialog::reject()

{

// Then rollback to our savepoint

pdb->revertToSavepoint(m_sRestorePointName);

pdb->updateSchema();

QDialog::reject();

}

void EditTableDialog::updateSqlText()

{

ui->sqlTextEdit->setText(m_table.sql());

}

void EditTableDialog::checkInput()

{

QString normTableName = ui->editTableName->text().trimmed();

bool valid = true;

if(normTableName.isEmpty())

valid = false;

if(ui->treeWidget->topLevelItemCount() == 0)

valid = false;

m_table.setName(normTableName);

updateSqlText();

ui->buttonBox->button(QDialogButtonBox::Ok)->setEnabled(valid);

}

void EditTableDialog::updateTypes()

{

QComboBox* typeBox = qobject_cast<QComboBox*>(sender());

if(typeBox)

{

QString type = typeBox->currentText();

QString column = sender()->property("column").toString();

int index;

for(index=0; index < m_table.fields().size(); ++index)

{

if(m_table.fields().at(index)->name() == column)

break;

}

m_table.fields().at(index)->setType(type);

if(!m_bNewTable)

pdb->renameColumn(curTable, column, m_table.fields().at(index));

checkInput();

}

}

void EditTableDialog::itemChanged(QTreeWidgetItem *item, int column)

{

int index = ui->treeWidget->indexOfTopLevelItem(item);

if(index < m_table.fields().count())

{

sqlb::FieldPtr field = m_table.fields().at(index);

bool callRenameColumn = false;

QString oldFieldName = field->name();

switch(column)

{

case kName:

// When a field of that name already exists, show a warning to the user and don't apply the new name

if(fieldNameExists(item->text(column)))

{

QMessageBox::warning(this, qApp->applicationName(), tr("There already is a field with that name. Please rename it first or choose a different "

"name for this field."));

// Reset the name to the old value but avoid calling this method again for that automatic change

ui->treeWidget->blockSignals(true);

item->setText(column, oldFieldName);

ui->treeWidget->blockSignals(false);

return;

}

// When editing an exiting table, check if any foreign keys would cause trouble in case this name is edited

if(!m_bNewTable)

{

foreach(const DBBrowserObject& fkobj, pdb->getBrowsableObjects())

{

foreach(const sqlb::FieldPtr& fkfield, fkobj.table.fields())

{

if(fkfield->foreignKey().table() == m_table.name())

{

if(fkfield->foreignKey().columns().contains(field->name()) || field->primaryKey())

{

QMessageBox::warning(this, qApp->applicationName(), tr("This column is referenced in a foreign key in table %1, column %2 and thus "

"its name cannot be changed.").arg(fkobj.getname()).arg(fkfield->name()));

// Reset the name to the old value but avoid calling this method again for that automatic change

ui->treeWidget->blockSignals(true);

item->setText(column, oldFieldName);

ui->treeWidget->blockSignals(false);

return;

}

}

}

}

}

field->setName(item->text(column));

qobject_cast<QComboBox*>(ui->treeWidget->itemWidget(item, kType))->setProperty("column", item->text(column));

if(!m_bNewTable)

callRenameColumn = true;

break;

case kType:

// see updateTypes() SLOT

break;

case kPrimaryKey:

{

field->setPrimaryKey(item->checkState(column) == Qt::Checked);

if(item->checkState(column) == Qt::Checked)

{

// this will unset any other autoincrement

for(int i = 0; i < ui->treeWidget->topLevelItemCount(); ++i)

{

QTreeWidgetItem* tbitem = ui->treeWidget->topLevelItem(i);

if(tbitem != item)

tbitem->setCheckState(kAutoIncrement, Qt::Unchecked);

}

} else {

item->setCheckState(kAutoIncrement, Qt::Unchecked);

}

if(!m_bNewTable)

callRenameColumn = true;

}

break;

case kNotNull:

{

// When editing an existing table and trying to set a column to Not Null an extra check is needed

if(!m_bNewTable && item->checkState(column) == Qt::Checked)

{

// Because our renameColumn() function fails when setting a column to Not Null when it already contains some NULL values

// we need to check for this case and cancel here. Maybe we can think of some way to modify the INSERT INTO ... SELECT statement

// to at least replace all troublesome NULL values by the default value

SqliteTableModel m(this, pdb);

m.setQuery(QString("SELECT COUNT(%1) FROM %2 WHERE %3 IS NULL;")

.arg(sqlb::escapeIdentifier(pdb->getObjectByName(curTable).table.rowidColumn()))

.arg(sqlb::escapeIdentifier(curTable))

.arg(sqlb::escapeIdentifier(field->name())));

if(m.data(m.index(0, 0)).toInt() > 0)

{

// There is a NULL value, so print an error message, uncheck the combobox, and return here

QMessageBox::information(this, qApp->applicationName(), tr("There is at least one row with this field set to NULL. "

"This makes it impossible to set this flag. Please change the table data first."));

item->setCheckState(column, Qt::Unchecked);

return;

}

}

field->setNotNull(item->checkState(column) == Qt::Checked);

if(!m_bNewTable)

callRenameColumn = true;

}

break;

case kAutoIncrement:

{

bool ischecked = item->checkState(column) == Qt::Checked;

if(ischecked)

{

// First check if the contents of this column are all integers. If not this field cannot be set to AI

if(!m_bNewTable)

{

SqliteTableModel m(this, pdb);

m.setQuery(QString("SELECT COUNT(*) FROM %1 WHERE %2 <> CAST(%3 AS INTEGER);")

.arg(sqlb::escapeIdentifier(curTable))

.arg(sqlb::escapeIdentifier(field->name()))

.arg(sqlb::escapeIdentifier(field->name())));

if(m.data(m.index(0, 0)).toInt() > 0)

{

// There is a non-integer value, so print an error message, uncheck the combobox, and return here

QMessageBox::information(this, qApp->applicationName(), tr("There is at least one row with a non-integer value in this field. "

"This makes it impossible to set the AI flag. Please change the table data first."));

item->setCheckState(column, Qt::Unchecked);

return;

}

}

// Make sure the data type is set to integer

QComboBox* comboType = qobject_cast<QComboBox*>(ui->treeWidget->itemWidget(item, kType));

comboType->setCurrentIndex(comboType->findText("INTEGER"));

item->setCheckState(kPrimaryKey, Qt::Checked);

// this will unset all other primary keys

// there can't be more than one autoincrement pk

for(int i = 0; i < ui->treeWidget->topLevelItemCount(); ++i)

{

QTreeWidgetItem* tbitem = ui->treeWidget->topLevelItem(i);

if(tbitem != item)

{

tbitem->setCheckState(kAutoIncrement, Qt::Unchecked);

tbitem->setCheckState(kPrimaryKey, Qt::Unchecked);

}

}

}

field->setAutoIncrement(ischecked);

if(!m_bNewTable)

callRenameColumn = true;

}

break;

case kUnique:

{

// When editing an existing table and trying to set a column to unique an extra check is needed

if(!m_bNewTable && item->checkState(column) == Qt::Checked)

{

// Because our renameColumn() function fails when setting a column to unique when it already contains the same values

SqliteTableModel m(this, pdb);

m.setQuery(QString("SELECT COUNT(%2) FROM %1;").arg(sqlb::escapeIdentifier(curTable)).arg(sqlb::escapeIdentifier(field->name())));

int rowcount = m.data(m.index(0, 0)).toInt();

m.setQuery(QString("SELECT COUNT(DISTINCT %2) FROM %1;").arg(sqlb::escapeIdentifier(curTable)).arg(sqlb::escapeIdentifier(field->name())));

int uniquecount = m.data(m.index(0, 0)).toInt();

if(rowcount != uniquecount)

{

// There is a NULL value, so print an error message, uncheck the combobox, and return here

QMessageBox::information(this, qApp->applicationName(), tr("Column '%1'' has no unique data.\n").arg(field->name())

+ tr("This makes it impossible to set this flag. Please change the table data first."));

item->setCheckState(column, Qt::Unchecked);

return;

}

}

field->setUnique(item->checkState(column) == Qt::Checked);

if(!m_bNewTable)

callRenameColumn = true;

}

break;

case kDefault:

{

QString new_value = item->text(column);

// If the default value isn't a SQL keyword perform an extra check: If it isn't numeric but doesn't start and end with quotes,

// add the quotes

if(new_value.size() && new_value.compare("null", Qt::CaseInsensitive) &&

new_value.compare("current_time", Qt::CaseInsensitive) &&

new_value.compare("current_date", Qt::CaseInsensitive) &&

new_value.compare("current_timestamp", Qt::CaseInsensitive))

{

QChar first_char = new_value.trimmed().at(0);

if(!((first_char == '\'' || first_char == '"') && new_value.trimmed().endsWith(first_char)))

{

bool is_numeric;

new_value.toDouble(&is_numeric);

if(!is_numeric)

{

if(new_value.trimmed().startsWith("=(") && new_value.trimmed().endsWith(')'))

{

new_value = new_value.trimmed().mid(1); // Leave the brackets as they are needed for a valid SQL expression

} else {

new_value = QString("'%1'").arg(new_value.replace("'", "''"));

item->setText(column, new_value);

}

}

}

}

field->setDefaultValue(new_value);

if(!m_bNewTable)

callRenameColumn = true;

}

break;

case kCheck:

field->setCheck(item->text(column));

if(!m_bNewTable)

callRenameColumn = true;

break;

case kForeignKey:

sqlb::ForeignKeyClause fk;

fk.setFromString(item->text(column));

field->setForeignKey(fk);

if(!m_bNewTable)

callRenameColumn = true;

break;

}

if(callRenameColumn)

pdb->renameColumn(curTable, oldFieldName, field);

}

checkInput();

}

void EditTableDialog::addField()

{

QTreeWidgetItem *tbitem = new QTreeWidgetItem(ui->treeWidget);

tbitem->setFlags(tbitem->flags() | Qt::ItemIsEditable);

// Find an unused name for the field by starting with 'Fieldx' where x is the number of fields + 1.

// If this name happens to exist already, increase x by one until we find an unused name.

{

unsigned int field_number = ui->treeWidget->topLevelItemCount();

QString field_name;

do

{

field_name = "Field" + QString::number(field_number);

field_number++;

} while(fieldNameExists(field_name));

tbitem->setText(kName, field_name);

}

QComboBox* typeBox = new QComboBox(ui->treeWidget);

typeBox->setProperty("column", tbitem->text(kName));

typeBox->setEditable(true);

typeBox->addItems(sqlb::Field::Datatypes);

ui->treeWidget->setItemWidget(tbitem, kType, typeBox);

connect(typeBox, SIGNAL(currentIndexChanged(int)), this, SLOT(updateTypes()));

//connect(typeBox, SIGNAL(editTextChanged(QString)), this, SLOT(updateTypes()));

tbitem->setCheckState(kNotNull, Qt::Unchecked);

tbitem->setCheckState(kPrimaryKey, Qt::Unchecked);

tbitem->setCheckState(kAutoIncrement, Qt::Unchecked);

tbitem->setCheckState(kUnique, Qt::Unchecked);

ui->treeWidget->addTopLevelItem(tbitem);

// add field to table object

sqlb::FieldPtr f(new sqlb::Field(

tbitem->text(kName),

typeBox->currentText()

));

m_table.addField(f);

// Actually add the new column to the table if we're editing an existing table

if(!m_bNewTable)

pdb->addColumn(curTable, f);

checkInput();

}

void EditTableDialog::removeField()

{

// Is there any item selected to delete?

if(!ui->treeWidget->currentItem())

return;

// Are we creating a new table or editing an old one?

if(m_bNewTable)

{

// Creating a new one

// Just delete that item. At this point there is no DB table to edit or data to be lost anyway

sqlb::FieldVector fields = m_table.fields();

fields.remove(ui->treeWidget->indexOfTopLevelItem(ui->treeWidget->currentItem()));

m_table.setFields(fields);

delete ui->treeWidget->currentItem();

} else {

// Editing an old one

// Ask user whether he really wants to delete that column

QString msg = tr("Are you sure you want to delete the field '%1'?\nAll data currently stored in this field will be lost.").arg(ui->treeWidget->currentItem()->text(0));

if(QMessageBox::warning(this, QApplication::applicationName(), msg, QMessageBox::Yes | QMessageBox::Default, QMessageBox::No | QMessageBox::Escape) == QMessageBox::Yes)

{

if(!pdb->renameColumn(curTable, ui->treeWidget->currentItem()->text(0), sqlb::FieldPtr()))

{

QMessageBox::warning(0, QApplication::applicationName(), pdb->lastErrorMessage);

} else {

//relayout

QString sTablesql = pdb->getObjectByName(curTable).getsql();

m_table = sqlb::Table::parseSQL(sTablesql).first;

populateFields();

}

}

}

checkInput();

}

void EditTableDialog::fieldSelectionChanged()

{

bool hasSelection = ui->treeWidget->selectionModel()->hasSelection();

// Enable the remove and the move up/down buttons if a field is selected, disable it otherwise

ui->removeFieldButton->setEnabled(hasSelection);

ui->buttonMoveUp->setEnabled(hasSelection);

ui->buttonMoveDown->setEnabled(hasSelection);

// If the selected line is the first one disable the move up button, it it's the last one disable the move down button

if(hasSelection)

{

ui->buttonMoveUp->setEnabled(ui->treeWidget->selectionModel()->currentIndex().row() != 0);

ui->buttonMoveDown->setEnabled(ui->treeWidget->selectionModel()->currentIndex().row() != ui->treeWidget->topLevelItemCount() - 1);

}

}

void EditTableDialog::moveUp()

{

moveCurrentField(false);

}

void EditTableDialog::moveDown()

{

moveCurrentField(true);

}

void EditTableDialog::moveCurrentField(bool down)

{

int currentRow = ui->treeWidget->currentIndex().row();

int newRow = currentRow + (down ? 1 : -1);

// Are we creating a new table or editing an old one?

if(m_bNewTable)

{

// Creating a new one

// Save the combobox first by making a copy

QComboBox* oldCombo = qobject_cast<QComboBox*>(ui->treeWidget->itemWidget(ui->treeWidget->topLevelItem(currentRow), kType));

QComboBox* newCombo = new QComboBox(ui->treeWidget);

newCombo->setProperty("column", oldCombo->property("column"));

connect(newCombo, SIGNAL(activated(int)), this, SLOT(updateTypes()));

newCombo->setEditable(true);

for(int i=0; i < oldCombo->count(); ++i)

newCombo->addItem(oldCombo->itemText(i));

newCombo->setCurrentIndex(oldCombo->currentIndex());

// Now, just remove the item and insert it at it's new position, then restore the combobox

QTreeWidgetItem* item = ui->treeWidget->takeTopLevelItem(currentRow);

ui->treeWidget->insertTopLevelItem(newRow, item);

ui->treeWidget->setItemWidget(item, kType, newCombo);

// Select the old item at its new position

ui->treeWidget->setCurrentIndex(ui->treeWidget->currentIndex().sibling(newRow, 0));

// Finally update the table SQL

sqlb::FieldVector fields = m_table.fields();

std::swap(fields[newRow], fields[currentRow]);

m_table.setFields(fields);

} else {

// Editing an old one

// Move the actual column

if(!pdb->renameColumn(

curTable,

ui->treeWidget->currentItem()->text(0),

m_table.fields().at(ui->treeWidget->indexOfTopLevelItem(ui->treeWidget->currentItem())),

(down ? 1 : -1)

))

{

QMessageBox::warning(0, QApplication::applicationName(), pdb->lastErrorMessage);

} else {

// Reload table SQL

QString sTablesql = pdb->getObjectByName(curTable).getsql();

m_table = sqlb::Table::parseSQL(sTablesql).first;

populateFields();

// Select old item at new position

ui->treeWidget->setCurrentIndex(ui->treeWidget->indexAt(QPoint(1, 1)).sibling(newRow, 0));

}

}

// Update the SQL preview

updateSqlText();

}

void EditTableDialog::setWithoutRowid(bool without_rowid)

{

if(without_rowid)

{

// Before setting the without rowid flag, first perform a check to see if the table meets all the required criteria for without rowid tables

int pk = m_table.findPk();

if(pk == -1 || m_table.fields().at(pk)->autoIncrement())

{

QMessageBox::information(this, QApplication::applicationName(),

tr("Please add a field which meets the following criteria before setting the without rowid flag:\n"

" - Primary key flag set\n"

" - Auto increment disabled"));

ui->checkWithoutRowid->setChecked(false);

return;

}

// If it does, override the the rowid column name of the table object with the name of the primary key.

m_table.setRowidColumn(m_table.fields().at(pk)->name());

} else {

// If the without rowid flag is unset no further checks are required. Just set the rowid column name back to "_rowid_"

m_table.setRowidColumn("_rowid_");

}

// Update the SQL preview

updateSqlText();

// TODO: Update table if we're editing an existing table

}

bool EditTableDialog::fieldNameExists(const QString& name)

{

foreach(const sqlb::FieldPtr& ptr, m_table.fields())

{

if(ptr->name() == name)

return true;

}

return false;

}