mirror of
https://github.com/sqlitebrowser/sqlitebrowser.git
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abd7d4e689
When importing a CSV file into an existing table (i.e. a table where we have a table schema), check the data type of a field before inserting empty values. If it is an integer field, don't insert empty string like we did before but 0 or NULL depending on the NOT NULL flag. See issue #195. Please note that this isn't perfect. The preview in the dialog doesn't reflect these changes yet, it just show you the contents of the file as is. It's a little tricky to change this and I somehow think it's better the way it is now anyway. Also the import doesn't check for other constraints like UNIQUE or CHECK which might cause trouble. But then again it didn't do that before either.
581 lines
20 KiB
C++
581 lines
20 KiB
C++
#include "ImportCsvDialog.h"
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#include "ui_ImportCsvDialog.h"
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#include "sqlitedb.h"
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#include "csvparser.h"
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#include "sqlite.h"
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#include <QMessageBox>
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#include <QProgressDialog>
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#include <QPushButton>
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#include <QDateTime>
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#include <QTextCodec>
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#include <QCompleter>
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#include <QComboBox>
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#include <QFile>
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#include <QTextStream>
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#include <QSettings>
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#include <QDebug>
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#include <QFileInfo>
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#include <memory>
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ImportCsvDialog::ImportCsvDialog(const QStringList &filenames, DBBrowserDB* db, QWidget* parent)
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: QDialog(parent),
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ui(new Ui::ImportCsvDialog),
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csvFilenames(filenames),
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pdb(db)
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{
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ui->setupUi(this);
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// Get the actual file name out of the provided path and use it as the default table name for import
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// For importing several files at once, the fields have to be the same so we can safely use the first
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QFileInfo file(filenames.first());
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ui->editName->setText(file.baseName());
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// Create a list of all available encodings and create an auto completion list from them
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QStringList encodingList;
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foreach(QString enc, QTextCodec::availableCodecs())
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encodingList.push_back(enc);
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encodingCompleter = new QCompleter(encodingList, this);
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encodingCompleter->setCaseSensitivity(Qt::CaseInsensitive);
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ui->editCustomEncoding->setCompleter(encodingCompleter);
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// Load last used settings and apply them
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QSettings settings(QApplication::organizationName(), QApplication::organizationName());
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ui->checkboxHeader->setChecked(settings.value("importcsv/firstrowheader", false).toBool());
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ui->checkBoxTrimFields->setChecked(settings.value("importcsv/trimfields", true).toBool());
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ui->checkBoxSeparateTables->setChecked(settings.value("importcsv/separatetables", false).toBool());
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setSeparatorChar(QChar(settings.value("importcsv/separator", ',').toInt()));
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setQuoteChar(QChar(settings.value("importcsv/quotecharacter", '"').toInt()));
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setEncoding(settings.value("importcsv/encoding", "UTF-8").toString());
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// Prepare and show interface depending on how many files are selected
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if (csvFilenames.length() > 1)
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{
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ui->separateTables->setVisible(true);
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ui->checkBoxSeparateTables->setVisible(true);
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ui->filePickerBlock->setVisible(true);
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selectFiles();
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}
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else if (csvFilenames.length() == 1)
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{
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ui->separateTables->setVisible(false);
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ui->checkBoxSeparateTables->setVisible(false);
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ui->filePickerBlock->setVisible(false);
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}
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selectedFile = csvFilenames.first();
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updatePreview();
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checkInput();
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}
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ImportCsvDialog::~ImportCsvDialog()
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{
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delete ui;
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}
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namespace {
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void rollback(
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ImportCsvDialog* dialog,
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DBBrowserDB* pdb,
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QProgressDialog& progress,
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const QString& savepointName,
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size_t nRecord,
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const QString& message)
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{
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progress.hide();
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QApplication::restoreOverrideCursor(); // restore original cursor
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if(!message.isEmpty())
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{
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QString sCSVInfo = QObject::tr("Error importing data");
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if(nRecord)
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sCSVInfo += QObject::tr(" from record number %1").arg(nRecord);
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QString error = sCSVInfo + QObject::tr(".\n%1").arg(message);
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QMessageBox::warning(dialog, QApplication::applicationName(), error);
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}
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pdb->revertToSavepoint(savepointName);
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}
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}
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class CSVImportProgress : public CSVProgress
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{
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public:
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explicit CSVImportProgress(size_t filesize)
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{
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m_pProgressDlg = new QProgressDialog(
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QObject::tr("Decoding CSV file..."),
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QObject::tr("Cancel"),
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0,
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filesize);
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m_pProgressDlg->setWindowModality(Qt::ApplicationModal);
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}
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~CSVImportProgress()
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{
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delete m_pProgressDlg;
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}
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void start()
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{
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m_pProgressDlg->show();
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}
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bool update(size_t pos)
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{
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m_pProgressDlg->setValue(pos);
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qApp->processEvents();
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return !m_pProgressDlg->wasCanceled();
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}
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void end()
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{
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m_pProgressDlg->hide();
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}
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private:
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QProgressDialog* m_pProgressDlg;
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};
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void ImportCsvDialog::accept()
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{
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// save settings
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QSettings settings(QApplication::organizationName(), QApplication::organizationName());
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settings.beginGroup("importcsv");
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settings.setValue("firstrowheader", ui->checkboxHeader->isChecked());
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settings.setValue("separator", currentSeparatorChar());
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settings.setValue("quotecharacter", currentQuoteChar());
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settings.setValue("trimfields", ui->checkBoxTrimFields->isChecked());
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settings.setValue("separatetables", ui->checkBoxSeparateTables->isChecked());
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settings.setValue("encoding", currentEncoding());
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settings.endGroup();
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// Get all the selected files and start the import
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if (ui->filePickerBlock->isVisible())
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{
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for (int i = 0; i < ui->filePicker->count(); i++) {
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auto item = ui->filePicker->item(i);
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if (item->checkState() == Qt::Checked) {
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importCsv(item->data(Qt::DisplayRole).toString(), item->data(Qt::UserRole).toString());
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}
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}
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}
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else
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{
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importCsv(csvFilenames.first());
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}
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QApplication::restoreOverrideCursor(); // restore original cursor
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QDialog::accept();
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}
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void ImportCsvDialog::updatePreview()
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{
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// Show/hide custom quote/separator input fields
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ui->editCustomQuote->setVisible(ui->comboQuote->currentIndex() == ui->comboQuote->count()-1);
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ui->editCustomSeparator->setVisible(ui->comboSeparator->currentIndex() == ui->comboSeparator->count()-1);
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ui->editCustomEncoding->setVisible(ui->comboEncoding->currentIndex() == ui->comboEncoding->count()-1);
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// Get preview data
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QFile file(selectedFile);
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file.open(QIODevice::ReadOnly);
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CSVParser csv(ui->checkBoxTrimFields->isChecked(), currentSeparatorChar(), currentQuoteChar());
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QTextStream tstream(&file);
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tstream.setCodec(currentEncoding().toUtf8());
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csv.parse(tstream, 20);
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file.close();
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// Reset preview widget
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ui->tablePreview->clear();
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ui->tablePreview->setColumnCount(csv.columns());
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// Exit if there are no lines to preview at all
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if(csv.columns() == 0)
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return;
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// Use first row as header if necessary
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CSVParser::TCSVResult::const_iterator itBegin = csv.csv().begin();
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if(ui->checkboxHeader->isChecked())
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{
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ui->tablePreview->setHorizontalHeaderLabels(*itBegin);
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++itBegin;
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}
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// Fill data section
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ui->tablePreview->setRowCount(std::distance(itBegin, csv.csv().end()));
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for(CSVParser::TCSVResult::const_iterator ct = itBegin;
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ct != csv.csv().end();
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++ct)
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{
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for(QStringList::const_iterator it = ct->begin(); it != ct->end(); ++it)
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{
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int rowNum = std::distance(itBegin, ct);
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if(it == ct->begin())
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{
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ui->tablePreview->setVerticalHeaderItem(
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rowNum,
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new QTableWidgetItem(QString::number(rowNum + 1)));
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}
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ui->tablePreview->setItem(
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rowNum,
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std::distance(ct->begin(), it),
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new QTableWidgetItem(*it));
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}
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}
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}
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void ImportCsvDialog::checkInput()
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{
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bool allowImporting = false;
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if (ui->filePickerBlock->isVisible()) {
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bool checkedItem = false;
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for (int i = 0; i < ui->filePicker->count(); i++) {
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if (ui->filePicker->item(i)->checkState() == Qt::Checked) checkedItem = true;
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}
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allowImporting = !ui->editName->text().isEmpty() && checkedItem;
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} else {
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allowImporting = !ui->editName->text().isEmpty();
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}
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if (ui->filePicker->currentItem()) {
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ui->filePicker->currentItem()->setData(Qt::UserRole, ui->editName->text());
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}
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ui->matchSimilar->setEnabled(ui->filePicker->currentItem() != nullptr);
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ui->buttonBox->button(QDialogButtonBox::Ok)->setEnabled(allowImporting);
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}
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void ImportCsvDialog::selectFiles()
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{
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for (auto fileName : csvFilenames) {
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auto fInfo = QFileInfo(fileName);
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auto item = new QListWidgetItem();
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item->setText(fileName);
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item->setData(Qt::UserRole, fInfo.baseName());
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item->setCheckState(Qt::Checked);
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ui->filePicker->addItem(item);
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}
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connect(ui->filePicker, SIGNAL(itemClicked(QListWidgetItem*)), SLOT(updateSelectedFilePreview(QListWidgetItem*)));
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}
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void ImportCsvDialog::updateSelectedFilePreview(QListWidgetItem* item)
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{
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selectedFile = item->data(Qt::DisplayRole).toString();
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QFileInfo fileInfo(selectedFile);
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if (ui->checkBoxSeparateTables->isChecked()) {
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ui->editName->setText(item->data(Qt::UserRole).toString());
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} else {
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ui->editName->setText(fileInfo.baseName());
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}
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updatePreview();
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checkInput();
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}
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void ImportCsvDialog::updateSelection(bool selected)
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{
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for (int i = 0; i < ui->filePicker->count(); i++)
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ui->filePicker->item(i)->setCheckState(selected ? Qt::Checked : Qt::Unchecked);
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ui->toggleSelected->setText(selected ? tr("Deselect All") : tr("Select All"));
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checkInput();
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}
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void ImportCsvDialog::matchSimilar()
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{
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auto item = ui->filePicker->currentItem();
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auto selectedHeader = generateFieldList(parseCSV(item->data(Qt::DisplayRole).toString(), 1));
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for (int i = 0; i < ui->filePicker->count(); i++)
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{
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auto item = ui->filePicker->item(i);
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auto header = generateFieldList(parseCSV(item->data(Qt::DisplayRole).toString(), 1));
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bool matchingHeader = false;
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if (selectedHeader.count() == header.count())
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{
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matchingHeader = std::equal(selectedHeader.begin(), selectedHeader.end(), header.begin(),
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[](const sqlb::FieldPtr& item1, const sqlb::FieldPtr& item2) -> bool {
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return (item1->name() == item2->name());
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});
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if (matchingHeader) {
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item->setCheckState(Qt::Checked);
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item->setBackgroundColor(Qt::green);
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}
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}
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else
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{
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item->setCheckState(Qt::Unchecked);
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item->setBackground(Qt::white);
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}
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}
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checkInput();
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}
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CSVParser ImportCsvDialog::parseCSV(const QString &fileName, qint64 count)
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{
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// Parse all csv data
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QFile file(fileName);
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file.open(QIODevice::ReadOnly);
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CSVParser csv(ui->checkBoxTrimFields->isChecked(), currentSeparatorChar(), currentQuoteChar());
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// If count is one, we only want the header, no need to see progress
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if (count != 1) csv.setCSVProgress(new CSVImportProgress(file.size()));
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QTextStream tstream(&file);
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tstream.setCodec(currentEncoding().toUtf8());
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csv.parse(tstream, count);
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file.close();
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return csv;
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}
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sqlb::FieldVector ImportCsvDialog::generateFieldList(const CSVParser &parser)
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{
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if (parser.csv().size() == 0) return sqlb::FieldVector();
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// Generate field names. These are either taken from the first CSV row or are generated in the format of "fieldXY" depending on the user input
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sqlb::FieldVector fieldList;
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if(ui->checkboxHeader->isChecked())
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{
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for(QStringList::const_iterator it = parser.csv().at(0).begin();
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it != parser.csv().at(0).end();
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++it)
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{
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// Remove invalid characters
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QString thisfield = *it;
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thisfield.replace("`", "");
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thisfield.replace(" ", "");
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thisfield.replace('"', "");
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thisfield.replace("'","");
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thisfield.replace(",","");
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thisfield.replace(";","");
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// Avoid empty field names
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if(thisfield.isEmpty())
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thisfield = QString("field%1").arg(std::distance(parser.csv().at(0).begin(), it) + 1);
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fieldList.push_back(sqlb::FieldPtr(new sqlb::Field(thisfield, "")));
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}
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} else {
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for(size_t i=0; i < parser.columns(); ++i)
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fieldList.push_back(sqlb::FieldPtr(new sqlb::Field(QString("field%1").arg(i+1), "")));
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}
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return fieldList;
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}
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void ImportCsvDialog::importCsv(const QString& fileName, const QString &name)
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{
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QString tableName;
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if (csvFilenames.size() > 1 && ui->checkBoxSeparateTables->isChecked()) {
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if (name.isEmpty()) {
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QFileInfo fileInfo(fileName);
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tableName = fileInfo.baseName();
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} else {
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tableName = name;
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}
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} else {
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tableName = ui->editName->text();
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}
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CSVParser csv = parseCSV(fileName);
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if (csv.csv().size() == 0) return;
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sqlb::FieldVector fieldList = generateFieldList(csv);
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// Show progress dialog
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QProgressDialog progress(tr("Inserting data..."), tr("Cancel"), 0, csv.csv().size());
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progress.setWindowModality(Qt::ApplicationModal);
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progress.show();
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// Are we importing into an existing table?
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bool importToExistingTable = false;
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const sqlb::ObjectPtr obj = pdb->getObjectByName(tableName);
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if(obj && obj->type() == sqlb::Object::Types::Table)
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{
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if((size_t)obj.dynamicCast<sqlb::Table>()->fields().size() != csv.columns())
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{
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QMessageBox::warning(this, QApplication::applicationName(),
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tr("There is already a table of that name and an import into an existing table is only possible if the number of columns match."));
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return;
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} else {
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// If we are importing multiple files, we can skip the warning and perform the inserts
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// To omit further warnings there is a filter button to select all conforming sql
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if (!ui->checkBoxSeparateTables->isChecked())
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importToExistingTable = true;
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if(QMessageBox::question(this, QApplication::applicationName(), tr("There is already a table of that name. Do you want to import the data into it?"), QMessageBox::Yes, QMessageBox::No) == QMessageBox::Yes)
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importToExistingTable = true;
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else
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return;
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}
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}
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// Create a savepoint, so we can rollback in case of any errors during importing
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// db needs to be saved or an error will occur
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QString restorepointName = pdb->generateSavepointName("csvimport");
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if(!pdb->setSavepoint(restorepointName))
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return rollback(this, pdb, progress, restorepointName, 0, tr("Creating restore point failed: %1").arg(pdb->lastError()));
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// Create table
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QStringList nullValues;
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if(!importToExistingTable)
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{
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if(!pdb->createTable(tableName, fieldList))
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return rollback(this, pdb, progress, restorepointName, 0, tr("Creating the table failed: %1").arg(pdb->lastError()));
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} else {
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// Importing into an existing table. So find out something about it's structure.
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// Prepare the values for each table column that are to be inserted if the field in the CSV file is empty. Depending on the data type
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// and the constraints of a field, we need to handle this case differently.
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sqlb::TablePtr tbl = pdb->getObjectByName(tableName).dynamicCast<sqlb::Table>();
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if(tbl)
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{
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foreach(const sqlb::FieldPtr& f, tbl->fields())
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{
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if(f->isInteger() && f->notnull()) // If this is an integer column but NULL isn't allowed, insert 0
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nullValues << "0";
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else if(f->isInteger() && !f->notnull()) // If this is an integer column and NULL is allowed, insert NULL
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nullValues << QString();
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else // Otherwise (i.e. if this isn't an integer column), insert an empty string
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nullValues << "''";
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}
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}
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}
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// now lets import all data, one row at a time
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CSVParser::TCSVResult::const_iterator itBegin = csv.csv().begin();
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if(ui->checkboxHeader->isChecked()) // If the first row contains the field names we should skip it here because this is the data import
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++itBegin;
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for(CSVParser::TCSVResult::const_iterator it = itBegin;
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it != csv.csv().end();
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++it)
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{
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QString sql = QString("INSERT INTO %1 VALUES(").arg(sqlb::escapeIdentifier(tableName));
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QStringList insertlist;
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for(int i=0;i<it->size();i++)
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{
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// Empty values need special treatment, but only when importing into an existing table where we could find out something about
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// its table definition
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if(importToExistingTable && it->at(i).isEmpty() && nullValues.size() > i)
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{
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// This is an empty value. We'll need to look up how to handle it depending on the field to be inserted into.
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QString val = nullValues.at(i);
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if(val.isNull())
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insertlist << "NULL";
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else
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insertlist << val;
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} else {
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// This is a non-empty value. Just add it to the list. The sqlite3_mprintf call with the %Q placeholder takes the value,
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// adds single quotes around it and doubles all single quotes inside it. This means it'll be safe to be inserted into the SQL
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// statement.
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char* formSQL = sqlite3_mprintf("%Q", (const char*)it->at(i).toUtf8());
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insertlist << formSQL;
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if(formSQL)
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sqlite3_free(formSQL);
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}
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}
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// add missing fields with empty values
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for(unsigned int i = insertlist.size(); i < csv.columns(); ++i)
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{
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qWarning() << "ImportCSV" << tr("Missing field for record %1").arg(std::distance(itBegin, it) + 1);
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insertlist << "NULL";
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}
|
|
|
|
sql.append(insertlist.join(QChar(',')));
|
|
sql.append(");");
|
|
|
|
if(!pdb->executeSQL(sql, false, false))
|
|
return rollback(this, pdb, progress, restorepointName, std::distance(itBegin, it) + 1, tr("Inserting row failed: %1").arg(pdb->lastError()));
|
|
|
|
// Update progress bar and check if cancel button was clicked
|
|
unsigned int prog = std::distance(csv.csv().begin(), it);
|
|
if(prog % 100 == 0)
|
|
progress.setValue(prog);
|
|
if(progress.wasCanceled())
|
|
return rollback(this, pdb, progress, restorepointName, std::distance(itBegin, it) + 1, "");
|
|
}
|
|
}
|
|
|
|
void ImportCsvDialog::setQuoteChar(const QChar& c)
|
|
{
|
|
QComboBox* combo = ui->comboQuote;
|
|
int index = combo->findText(c);
|
|
if(index == -1)
|
|
{
|
|
combo->setCurrentIndex(combo->count());
|
|
ui->editCustomQuote->setText(c);
|
|
}
|
|
else
|
|
{
|
|
combo->setCurrentIndex(index);
|
|
}
|
|
}
|
|
|
|
char ImportCsvDialog::currentQuoteChar() const
|
|
{
|
|
// The last item in the combobox is the 'Other' item; if it is selected return the text of the line edit field instead
|
|
if(ui->comboQuote->currentIndex() == ui->comboQuote->count()-1)
|
|
return ui->editCustomQuote->text().length() ? ui->editCustomQuote->text().at(0).toLatin1() : 0;
|
|
|
|
if(ui->comboQuote->currentText().length())
|
|
return ui->comboQuote->currentText().at(0).toLatin1();
|
|
else
|
|
return 0;
|
|
}
|
|
|
|
void ImportCsvDialog::setSeparatorChar(const QChar& c)
|
|
{
|
|
QComboBox* combo = ui->comboSeparator;
|
|
QString sText = c == '\t' ? QString("Tab") : QString(c);
|
|
int index = combo->findText(sText);
|
|
if(index == -1)
|
|
{
|
|
combo->setCurrentIndex(combo->count());
|
|
ui->editCustomSeparator->setText(c);
|
|
}
|
|
else
|
|
{
|
|
combo->setCurrentIndex(index);
|
|
}
|
|
}
|
|
|
|
char ImportCsvDialog::currentSeparatorChar() const
|
|
{
|
|
// The last item in the combobox is the 'Other' item; if it is selected return the text of the line edit field instead
|
|
if(ui->comboSeparator->currentIndex() == ui->comboSeparator->count()-1)
|
|
return ui->editCustomSeparator->text().length() ? ui->editCustomSeparator->text().at(0).toLatin1() : 0;
|
|
|
|
return ui->comboSeparator->currentText() == tr("Tab") ? '\t' : ui->comboSeparator->currentText().at(0).toLatin1();
|
|
}
|
|
|
|
void ImportCsvDialog::setEncoding(const QString& sEnc)
|
|
{
|
|
QComboBox* combo = ui->comboEncoding;
|
|
int index = combo->findText(sEnc);
|
|
if(index == -1)
|
|
{
|
|
combo->setCurrentIndex(combo->count());
|
|
ui->editCustomEncoding->setText(sEnc);
|
|
}
|
|
else
|
|
{
|
|
combo->setCurrentIndex(index);
|
|
}
|
|
}
|
|
|
|
QString ImportCsvDialog::currentEncoding() const
|
|
{
|
|
// The last item in the combobox is the 'Other' item; if it is selected return the text of the line edit field instead
|
|
if(ui->comboEncoding->currentIndex() == ui->comboEncoding->count()-1)
|
|
return ui->editCustomEncoding->text().length() ? ui->editCustomEncoding->text() : "UTF-8";
|
|
else
|
|
return ui->comboEncoding->currentText();
|
|
}
|