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Copy pathExportDataDialog.cpp
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#include "ExportDataDialog.h"
#include "ui_ExportDataDialog.h"
#include "sqlitedb.h"
#include "Settings.h"
#include "sqlite.h"
#include "FileDialog.h"
#include "IconCache.h"
#include <QFile>
#include <QTextStream>
#include <QMessageBox>
#include <QTextCodec>
#include <json.hpp>
using json = nlohmann::json;
ExportDataDialog::ExportDataDialog(DBBrowserDB& db, ExportFormats format, QWidget* parent, const std::string& query, const sqlb::ObjectIdentifier& selection)
: QDialog(parent),
ui(new Ui::ExportDataDialog),
pdb(db),
m_format(format),
m_sQuery(query)
{
// Create UI
ui->setupUi(this);
// Show different option widgets depending on the export format
ui->stackFormat->setCurrentIndex(format);
if(format == ExportFormatJson) {
setWindowTitle(tr("Export data as JSON"));
}
// Retrieve the saved dialog preferences
ui->checkHeader->setChecked(Settings::getValue("exportcsv", "firstrowheader").toBool());
setSeparatorChar(Settings::getValue("exportcsv", "separator").toInt());
setQuoteChar(Settings::getValue("exportcsv", "quotecharacter").toInt());
setNewLineString(Settings::getValue("exportcsv", "newlinecharacters").toString());
ui->checkPrettyPrint->setChecked(Settings::getValue("exportjson", "prettyprint").toBool());
// Update the visible/hidden status of the "Other" line edit fields
showCustomCharEdits();
// If a SQL query was specified hide the table combo box. If not fill it with tables to export
if(query.empty())
{
// Get list of tables to export
for(const auto& it : pdb.schemata)
{
const auto tables = it.second.equal_range("table");
const auto views = it.second.equal_range("view");
std::map<std::string, sqlb::ObjectPtr> objects;
for(auto jt=tables.first;jt!=tables.second;++jt)
objects.insert({jt->second->name(), jt->second});
for(auto jt=views.first;jt!=views.second;++jt)
objects.insert({jt->second->name(), jt->second});
for(const auto& jt : objects)
{
sqlb::ObjectIdentifier obj(it.first, jt.second->name());
QListWidgetItem* item = new QListWidgetItem(IconCache::get(sqlb::Object::typeToString(jt.second->type())), QString::fromStdString(obj.toDisplayString()));
item->setData(Qt::UserRole, QString::fromStdString(obj.toSerialised()));
ui->listTables->addItem(item);
}
}
// Sort list of tables and select the table specified in the selection parameter or alternatively the first one
ui->listTables->model()->sort(0);
if(selection.isEmpty())
{
ui->listTables->setCurrentItem(ui->listTables->item(0));
} else {
for(int i=0;i<ui->listTables->count();i++)
{
if(sqlb::ObjectIdentifier(ui->listTables->item(i)->data(Qt::UserRole).toString().toStdString()) == selection)
{
ui->listTables->setCurrentRow(i);
break;
}
}
}
} else {
// Hide table combo box
ui->labelTable->setVisible(false);
ui->listTables->setVisible(false);
resize(minimumSize());
}
}
ExportDataDialog::~ExportDataDialog()
{
delete ui;
}
bool ExportDataDialog::exportQuery(const std::string& sQuery, const QString& sFilename)
{
switch(m_format)
{
case ExportFormatCsv:
return exportQueryCsv(sQuery, sFilename);
case ExportFormatJson:
return exportQueryJson(sQuery, sFilename);
}
return false;
}
bool ExportDataDialog::exportQueryCsv(const std::string& sQuery, const QString& sFilename)
{
// Prepare the quote and separating characters
QChar quoteChar = currentQuoteChar();
QString quotequoteChar = QString(quoteChar) + quoteChar;
QChar sepChar = currentSeparatorChar();
QString newlineStr = currentNewLineString();
// Chars that require escaping
std::string special_chars = newlineStr.toStdString() + sepChar.toLatin1() + quoteChar.toLatin1();
// Open file
QFile file(sFilename);
if(file.open(QIODevice::WriteOnly))
{
// Open text stream to the file
QTextStream stream(&file);
auto pDb = pdb.get(tr("exporting CSV"));
sqlite3_stmt* stmt;
int status = sqlite3_prepare_v2(pDb.get(), sQuery.c_str(), static_cast<int>(sQuery.size()), &stmt, nullptr);
if(SQLITE_OK == status)
{
if(ui->checkHeader->isChecked())
{
int columns = sqlite3_column_count(stmt);
for (int i = 0; i < columns; ++i)
{
QString content = QString::fromUtf8(sqlite3_column_name(stmt, i));
if(content.toStdString().find_first_of(special_chars) != std::string::npos)
stream << quoteChar << content.replace(quoteChar, quotequoteChar) << quoteChar;
else
stream << content;
if(i != columns - 1)
// Only output the separator value if sepChar isn't 0,
// as that's used to indicate no separator character
// should be used
if(!sepChar.isNull())
stream << sepChar;
}
stream << newlineStr;
}
QApplication::setOverrideCursor(Qt::WaitCursor);
int columns = sqlite3_column_count(stmt);
size_t counter = 0;
while(sqlite3_step(stmt) == SQLITE_ROW)
{
for (int i = 0; i < columns; ++i)
{
QString content = QString::fromUtf8(
reinterpret_cast<const char*>(sqlite3_column_blob(stmt, i)),
sqlite3_column_bytes(stmt, i));
// If no quote char is set but the content contains a line break, we enforce some quote characters. This probably isn't entirely correct
// but still better than having the line breaks unquoted and effectively outputting a garbage file.
if(quoteChar.isNull() && content.contains(newlineStr))
stream << '"' << content.replace('"', "\"\"") << '"';
// If the content needs to be quoted, quote it. But only if a quote char has been specified
else if(!quoteChar.isNull() && content.toStdString().find_first_of(special_chars) != std::string::npos)
stream << quoteChar << content.replace(quoteChar, quotequoteChar) << quoteChar;
// If it doesn't need to be quoted, don't quote it
else
stream << content;
if(i != columns - 1)
// Only output the separator value if sepChar isn't 0,
// as that's used to indicate no separator character
// should be used
if(!sepChar.isNull())
stream << sepChar;
}
stream << newlineStr;
if(counter % 1000 == 0)
qApp->processEvents();
counter++;
}
}
sqlite3_finalize(stmt);
QApplication::restoreOverrideCursor();
qApp->processEvents();
// Done writing the file
file.close();
} else {
QMessageBox::warning(this, QApplication::applicationName(),
tr("Could not open output file: %1").arg(sFilename));
return false;
}
return true;
}
bool ExportDataDialog::exportQueryJson(const std::string& sQuery, const QString& sFilename)
{
// Open file
QFile file(sFilename);
if(file.open(QIODevice::WriteOnly))
{
auto pDb = pdb.get(tr("exporting JSON"));
sqlite3_stmt* stmt;
int status = sqlite3_prepare_v2(pDb.get(), sQuery.c_str(), static_cast<int>(sQuery.size()), &stmt, nullptr);
json json_table;
if(SQLITE_OK == status)
{
QApplication::setOverrideCursor(Qt::WaitCursor);
int columns = sqlite3_column_count(stmt);
size_t counter = 0;
std::vector<std::string> column_names;
while(sqlite3_step(stmt) == SQLITE_ROW)
{
// Get column names if we didn't do so before
if(!column_names.size())
{
for(int i=0;i<columns;++i)
column_names.push_back(sqlite3_column_name(stmt, i));
}
json json_row;
for(int i=0;i<columns;++i)
{
int type = sqlite3_column_type(stmt, i);
std::string column_name = column_names[static_cast<size_t>(i)];
switch (type) {
case SQLITE_INTEGER: {
qint64 content = sqlite3_column_int64(stmt, i);
json_row[column_name] = content;
break;
}
case SQLITE_FLOAT: {
double content = sqlite3_column_double(stmt, i);
json_row[column_name] = content;
break;
}
case SQLITE_NULL: {
json_row[column_name] = nullptr;
break;
}
case SQLITE_TEXT: {
QString content = QString::fromUtf8(
reinterpret_cast<const char*>(sqlite3_column_text(stmt, i)),
sqlite3_column_bytes(stmt, i));
json_row[column_name] = content.toStdString();
break;
}
case SQLITE_BLOB: {
QByteArray content(reinterpret_cast<const char*>(sqlite3_column_blob(stmt, i)),
sqlite3_column_bytes(stmt, i));
QTextCodec *codec = QTextCodec::codecForName("UTF-8");
QString string = codec->toUnicode(content.toBase64(QByteArray::Base64Encoding));
json_row[column_name] = string.toStdString();
break;
}
}
}
json_table.push_back(json_row);
if(counter % 1000 == 0)
qApp->processEvents();
counter++;
}
}
sqlite3_finalize(stmt);
// Create JSON document
file.write(json_table.dump(ui->checkPrettyPrint->isChecked() ? 4 : -1).c_str());
QApplication::restoreOverrideCursor();
qApp->processEvents();
// Done writing the file
file.close();
} else {
QMessageBox::warning(this, QApplication::applicationName(),
tr("Could not open output file: %1").arg(sFilename));
return false;
}
return true;
}
void ExportDataDialog::accept()
{
QStringList file_dialog_filter;
QString default_file_extension;
switch(m_format)
{
case ExportFormatCsv:
file_dialog_filter << FILE_FILTER_CSV
<< FILE_FILTER_TSV
<< FILE_FILTER_DSV
<< FILE_FILTER_TXT
<< FILE_FILTER_ALL;
default_file_extension = FILE_EXT_CSV_DEFAULT;
break;
case ExportFormatJson:
file_dialog_filter << FILE_FILTER_JSON
<< FILE_FILTER_TXT
<< FILE_FILTER_ALL;
default_file_extension = FILE_EXT_JSON_DEFAULT;
break;
}
if(!m_sQuery.empty())
{
// called from sqlexecute query tab
QString sFilename = FileDialog::getSaveFileName(
CreateDataFile,
this,
tr("Choose a filename to export data"),
file_dialog_filter.join(";;"));
if(sFilename.isEmpty())
{
close();
return;
}
exportQuery(m_sQuery, sFilename);
} else {
// called from the File export menu
QList<QListWidgetItem*> selectedItems = ui->listTables->selectedItems();
if(selectedItems.isEmpty())
{
QMessageBox::warning(this, QApplication::applicationName(),
tr("Please select at least 1 table."));
return;
}
// Get filename
QStringList filenames;
if(selectedItems.size() == 1)
{
QString fileName = FileDialog::getSaveFileName(
CreateDataFile,
this,
tr("Choose a filename to export data"),
file_dialog_filter.join(";;"),
selectedItems.at(0)->text() + default_file_extension);
if(fileName.isEmpty())
{
close();
return;
}
filenames << fileName;
} else {
// ask for folder
QString exportfolder = FileDialog::getExistingDirectory(
CreateDataFile,
this,
tr("Choose a directory"),
QFileDialog::ShowDirsOnly | QFileDialog::DontResolveSymlinks);
if(exportfolder.isEmpty())
{
close();
return;
}
for(const QListWidgetItem* item : selectedItems)
filenames << QDir(exportfolder).filePath(item->text() + default_file_extension);
}
// Only if the user hasn't clicked the cancel button
for(int i = 0; i < selectedItems.size(); ++i)
{
// if we are called from execute sql tab, query is already set
// and we only export 1 select
std::string sQuery = "SELECT * FROM " + sqlb::ObjectIdentifier(selectedItems.at(i)->data(Qt::UserRole).toString().toStdString()).toString() + ";";
exportQuery(sQuery, filenames.at(i));
}
}
// Save the dialog preferences for future use
Settings::setValue("exportcsv", "firstrowheader", ui->checkHeader->isChecked());
Settings::setValue("exportjson", "prettyprint", ui->checkPrettyPrint->isChecked());
Settings::setValue("exportcsv", "separator", currentSeparatorChar());
Settings::setValue("exportcsv", "quotecharacter", currentQuoteChar());
Settings::setValue("exportcsv", "newlinecharacters", currentNewLineString());
// Notify the user the export has completed
QMessageBox::information(this, QApplication::applicationName(), tr("Export completed."));
QDialog::accept();
}
void ExportDataDialog::showCustomCharEdits()
{
// Retrieve selection info for the quote, separator, and newline widgets
int quoteIndex = ui->comboQuoteCharacter->currentIndex();
int quoteCount = ui->comboQuoteCharacter->count();
int sepIndex = ui->comboFieldSeparator->currentIndex();
int sepCount = ui->comboFieldSeparator->count();
int newLineIndex = ui->comboNewLineString->currentIndex();
int newLineCount = ui->comboNewLineString->count();
// Determine which will have their 'Other' line edit widget visible
bool quoteVisible = quoteIndex == (quoteCount - 1);
bool sepVisible = sepIndex == (sepCount - 1);
bool newLineVisible = newLineIndex == (newLineCount - 1);
// Update the visibility of the 'Other' line edit widgets
ui->editCustomQuote->setVisible(quoteVisible);
ui->editCustomSeparator->setVisible(sepVisible);
ui->editCustomNewLine->setVisible(newLineVisible);
}
void ExportDataDialog::setQuoteChar(const QChar& c)
{
QComboBox* combo = ui->comboQuoteCharacter;
// Set the combo and/or Other box to the correct selection
switch (c.toLatin1()) {
case '"':
combo->setCurrentIndex(0); // First option is a quote character
break;
case '\'':
combo->setCurrentIndex(1); // Second option is a single quote character
break;
case 0:
combo->setCurrentIndex(2); // Third option is blank (no character)
break;
default:
// For everything else, set the combo box to option 3 ('Other') and
// place the desired string into the matching edit line box
combo->setCurrentIndex(3);
if(!c.isNull())
{
// Don't set it if/when it's the 0 flag value
ui->editCustomQuote->setText(c);
}
break;
}
}
char ExportDataDialog::currentQuoteChar() const
{
QComboBox* combo = ui->comboQuoteCharacter;
switch (combo->currentIndex()) {
case 0:
return '"'; // First option is a quote character
case 1:
return '\''; // Second option is a single quote character
case 2:
return 0; // Third option is a blank (no character)
default:
// The 'Other' option was selected, so check if the matching edit
// line widget contains something
int customQuoteLength = ui->editCustomQuote->text().length();
if (customQuoteLength > 0) {
// Yes it does. Return its first character
char customQuoteChar = ui->editCustomQuote->text().at(0).toLatin1();
return customQuoteChar;
} else {
// No it doesn't, so return 0 to indicate it was empty
return 0;
}
}
}
void ExportDataDialog::setSeparatorChar(const QChar& c)
{
QComboBox* combo = ui->comboFieldSeparator;
// Set the combo and/or Other box to the correct selection
switch (c.toLatin1()) {
case ',':
combo->setCurrentIndex(0); // First option is a comma character
break;
case ';':
combo->setCurrentIndex(1); // Second option is a semi-colon character
break;
case '\t':
combo->setCurrentIndex(2); // Third option is a tab character
break;
case '|':
combo->setCurrentIndex(3); // Fourth option is a pipe symbol
break;
default:
// For everything else, set the combo box to option 3 ('Other') and
// place the desired string into the matching edit line box
combo->setCurrentIndex(4);
// Only put the separator character in the matching line edit box if
// it's not the flag value of 0, which is for indicating its empty
if(!c.isNull())
ui->editCustomSeparator->setText(c);
break;
}
}
char ExportDataDialog::currentSeparatorChar() const
{
QComboBox* combo = ui->comboFieldSeparator;
switch (combo->currentIndex()) {
case 0:
return ','; // First option is a comma character
case 1:
return ';'; // Second option is a semi-colon character
case 2:
return '\t'; // Third option is a tab character
case 3:
return '|'; // Fourth option is a pipe character
default:
// The 'Other' option was selected, so check if the matching edit
// line widget contains something
int customSeparatorLength = ui->editCustomSeparator->text().length();
if (customSeparatorLength > 0) {
// Yes it does. Return its first character
char customSeparatorChar = ui->editCustomSeparator->text().at(0).toLatin1();
return customSeparatorChar;
} else {
// No it doesn't, so return 0 to indicate it was empty
return 0;
}
}
}
void ExportDataDialog::setNewLineString(const QString& s)
{
QComboBox* combo = ui->comboNewLineString;
// Set the combo and/or Other box to the correct selection
if (s == "\r\n") {
// For Windows style newlines, set the combo box to option 0
combo->setCurrentIndex(0);
} else if (s == "\n") {
// For Unix style newlines, set the combo box to option 1
combo->setCurrentIndex(1);
} else {
// For everything else, set the combo box to option 2 ('Other') and
// place the desired string into the matching edit line box
combo->setCurrentIndex(2);
ui->editCustomNewLine->setText(s);
}
}
QString ExportDataDialog::currentNewLineString() const
{
QComboBox* combo = ui->comboNewLineString;
switch (combo->currentIndex()) {
case 0:
// Windows style newlines
return QString("\r\n");
case 1:
// Unix style newlines
return QString("\n");
default:
// Return the text from the 'Other' box
return QString(ui->editCustomNewLine->text().toLatin1());
}
}
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