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#include <QMessageBox>

#include "ColumnDisplayFormatDialog.h"

#include "ui_ColumnDisplayFormatDialog.h"

#include "sql/sqlitetypes.h"

#include "sqlitedb.h"

ColumnDisplayFormatDialog::ColumnDisplayFormatDialog(DBBrowserDB& db, const sqlb::ObjectIdentifier& tableName, const QString& colname, const QString& current_format, QWidget* parent)

: QDialog(parent),

ui(new Ui::ColumnDisplayFormatDialog),

column_name(colname),

pdb(db),

curTable(tableName)

{

// Create UI

ui->setupUi(this);

ui->comboDisplayFormat->addItem(tr("Default"), "default");

ui->comboDisplayFormat->insertSeparator(ui->comboDisplayFormat->count());

ui->comboDisplayFormat->addItem(tr("Decimal number"), "decimal");

ui->comboDisplayFormat->addItem(tr("Exponent notation"), "exponent");

ui->comboDisplayFormat->addItem(tr("Hex blob"), "hexblob");

ui->comboDisplayFormat->addItem(tr("Hex number"), "hex");

ui->comboDisplayFormat->addItem(tr("Octal number"), "octal");

ui->comboDisplayFormat->addItem(tr("Round number"), "round");

ui->comboDisplayFormat->insertSeparator(ui->comboDisplayFormat->count());

ui->comboDisplayFormat->addItem(tr("Apple NSDate to date"), "appleDate");

ui->comboDisplayFormat->addItem(tr("Java epoch (milliseconds) to date"), "javaEpoch");

ui->comboDisplayFormat->addItem(tr("Julian day to date"), "julian");

ui->comboDisplayFormat->addItem(tr("Unix epoch to date"), "epoch");

ui->comboDisplayFormat->addItem(tr("Unix epoch to local time"), "epochLocalTime");

ui->comboDisplayFormat->addItem(tr("Windows DATE to date"), "winDate");

ui->comboDisplayFormat->addItem(tr("Date as dd/mm/yyyy"), "ddmmyyyyDate");

ui->comboDisplayFormat->insertSeparator(ui->comboDisplayFormat->count());

ui->comboDisplayFormat->addItem(tr("Lower case"), "lower");

ui->comboDisplayFormat->addItem(tr("Upper case"), "upper");

ui->comboDisplayFormat->insertSeparator(ui->comboDisplayFormat->count());

ui->comboDisplayFormat->addItem(tr("Custom"), "custom");

ui->labelDisplayFormat->setText(ui->labelDisplayFormat->text().arg(column_name));

formatFunctions["decimal"] = "printf('%d', " + sqlb::escapeIdentifier(column_name) + ")";

formatFunctions["exponent"] = "printf('%e', " + sqlb::escapeIdentifier(column_name) + ")";

formatFunctions["hexblob"] = "hex(" + sqlb::escapeIdentifier(column_name) + ")";

formatFunctions["hex"] = "printf('0x%x', " + sqlb::escapeIdentifier(column_name) + ")";

formatFunctions["octal"] = "printf('%o', " + sqlb::escapeIdentifier(column_name) + ")";

formatFunctions["round"] = "round(" + sqlb::escapeIdentifier(column_name) + ")";

formatFunctions["appleDate"] = "datetime('2001-01-01', " + sqlb::escapeIdentifier(column_name) + " || ' seconds')";

formatFunctions["javaEpoch"] = "strftime('%Y-%m-%d %H:%M:%S.', " + sqlb::escapeIdentifier(column_name) +

"/1000, 'unixepoch') || (" + sqlb::escapeIdentifier(column_name) + "%1000)";

formatFunctions["julian"] = "datetime(" + sqlb::escapeIdentifier(column_name) + ")";

formatFunctions["epoch"] = "datetime(" + sqlb::escapeIdentifier(column_name) + ", 'unixepoch')";

formatFunctions["epochLocalTime"] = "datetime(" + sqlb::escapeIdentifier(column_name) + ", 'unixepoch', 'localtime')";

formatFunctions["winDate"] = "datetime('1899-12-30', " + sqlb::escapeIdentifier(column_name) + " || ' days')";

formatFunctions["ddmmyyyyDate"] = "strftime('%d/%m/%Y', " + sqlb::escapeIdentifier(column_name) + ")";

formatFunctions["lower"] = "lower(" + sqlb::escapeIdentifier(column_name) + ")";

formatFunctions["upper"] = "upper(" + sqlb::escapeIdentifier(column_name) + ")";

// Set the current format, if it's empty set the default format

if(current_format.isEmpty())

{

ui->comboDisplayFormat->setCurrentIndex(0);

updateSqlCode();

} else {

// When it doesn't match any predefined format, it is considered custom

QString formatName = "custom";

auto it = std::find_if(formatFunctions.begin(), formatFunctions.end(), [current_format](const std::pair<std::string, QString>& s) {

return s.second == current_format;

});

if(it != formatFunctions.end())

formatName = QString::fromStdString(it->first);

ui->comboDisplayFormat->setCurrentIndex(ui->comboDisplayFormat->findData(formatName));

ui->editDisplayFormat->setText(current_format);

}

ColumnDisplayFormatDialog::~ColumnDisplayFormatDialog()

{

delete ui;

}

QString ColumnDisplayFormatDialog::selectedDisplayFormat() const

{

if(ui->comboDisplayFormat->currentData().toString() == "default")

return QString();

else

return ui->editDisplayFormat->text();

}

void ColumnDisplayFormatDialog::updateSqlCode()

{

std::string format = ui->comboDisplayFormat->currentData().toString().toStdString();

if(format == "default")

ui->editDisplayFormat->setText(sqlb::escapeIdentifier(column_name));

else if(format != "custom")

ui->editDisplayFormat->setText(formatFunctions.at(format));

}

void ColumnDisplayFormatDialog::accept()

{

QString errorMessage;

// Accept the SQL code if it's the column name (default), it contains a function invocation applied to the column name and it can be

// executed without errors returning only one column.

// Users could still devise a way to break this, but this is considered good enough for letting them know about simple incorrect

// cases.

if(!(ui->editDisplayFormat->text() == sqlb::escapeIdentifier(column_name) ||

ui->editDisplayFormat->text().contains(QRegExp("[a-z]+[a-z_0-9]* *\\(.*" + QRegExp::escape(sqlb::escapeIdentifier(column_name)) + ".*\\)", Qt::CaseInsensitive))))

errorMessage = tr("Custom display format must contain a function call applied to %1").arg(sqlb::escapeIdentifier(column_name));

else {

// Execute a query using the display format and check that it only returns one column.

int customNumberColumns = 0;

DBBrowserDB::execCallback callback = [&customNumberColumns](int numberColumns, QStringList, QStringList) -> bool {

customNumberColumns = numberColumns;

// Return false so the query is not aborted and no error is reported.

return false;

};

if(!pdb.executeSQL(QString("SELECT %1 FROM %2 LIMIT 1").arg(ui->editDisplayFormat->text(), QString::fromStdString(curTable.toString())),

false, true, callback))

errorMessage = tr("Error in custom display format. Message from database engine:\n\n%1").arg(pdb.lastError());

else if(customNumberColumns != 1)

errorMessage = tr("Custom display format must return only one column but it returned %1.").arg(customNumberColumns);

}

if(!errorMessage.isEmpty())

QMessageBox::warning(this, QApplication::applicationName(), errorMessage);

else

QDialog::accept();

}

void ColumnDisplayFormatDialog::setCustom(bool modified)

{

// If the SQL code is modified by user, select the custom value in the combo-box

if(modified && ui->editDisplayFormat->hasFocus())

ui->comboDisplayFormat->setCurrentIndex(ui->comboDisplayFormat->findData("custom"));

}

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