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/*
* importutils.cpp
*
* (c) 2002-2003,2008-2009 by Jeremy Bowman <jmbowman@alum.mit.edu>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*/
/** @file importutils.cpp
* Source file for ImportUtils
*/
#include <QDateTime>
#include <QFile>
#include <QFileInfo>
#include <QObject>
#include <QRegExp>
#include <QStringList>
#include <QTextStream>
#include <QXmlInputSource>
#include <QXmlSimpleReader>
#include "database.h"
#include "datatypes.h"
#include "importutils.h"
#include "mobiledb.h"
#include "xmlimport.h"
/**
* Constructor.
*/
ImportUtils::ImportUtils()
{
}
/**
* Import data from a MobileDB file into a new PortaBase file.
*
* @param filename The path to the MobileDB file to be imported
* @param db The PortaBase database to import into
* @return An error message if there was a problem importing the data, an
* empty string otherwise
*/
QString ImportUtils::importMobileDB(const QString &filename, Database *db)
{
MobileDBFile mdb(filename);
if (!mdb.read()) {
return QObject::tr("Not a valid MobileDB file");
}
QStringList names = mdb.field_labels();
int colCount = names.count();
int rowCount = mdb.row_count();
int *types = new int[colCount];
QStringList mdbTypes = mdb.field_types();
const int *fieldLengths = mdb.field_lengths();
int *widths = new int[colCount];
int enumCount = 0;
int i;
for (i = 0; i < colCount; i++) {
widths[i] = (fieldLengths[i] * 3) / 2;
QString type = mdbTypes[i];
char firstLetter = type[0].toLatin1();
QString defaultVal = "0";
if (firstLetter == 'I') {
types[i] = INTEGER;
}
else if (firstLetter == 'F') {
types[i] = FLOAT;
}
else if (firstLetter == 'B') {
types[i] = BOOLEAN;
if (type.contains('!')) {
defaultVal = "1";
}
}
else if (firstLetter == 'D') {
types[i] = DATE;
if (!type.contains('!')) {
defaultVal = "17520914";
}
}
else if (firstLetter == 'd') {
types[i] = TIME;
if (!type.contains('!')) {
defaultVal = "-1";
}
}
else if (firstLetter == 'L') {
types[i] = FIRST_ENUM + enumCount;
enumCount++;
QStringList options;
type = type.right(type.length() - 1);
int sepIndex = type.indexOf(';');
while (sepIndex != -1) {
options.append(type.left(sepIndex));
type = type.right(type.length() - sepIndex - 1);
sepIndex = type.indexOf(';');
}
options.append(type);
db->addEnum(names[i], options);
defaultVal = options[0];
}
else {
types[i] = STRING;
defaultVal = "";
}
db->addColumn(i, names[i], types[i], defaultVal);
}
db->updateDataFormat();
for (i = 0; i < rowCount; i++) {
QStringList newRow = convertMobileDBRow(mdb.row(i), types);
int rowColCount = newRow.count();
if (rowColCount != colCount) {
// may be some kind of note...ignore it
continue;
}
QString message = db->addRow(newRow);
if (!message.isEmpty()) {
message = QObject::tr("Error in row %1").arg(i + 1)
+ "\n" + message;
delete[] types;
delete[] widths;
return message;
}
}
db->addView("_all", db->listColumns(), "_none", "_none");
db->setViewColWidths(widths);
delete[] types;
delete[] widths;
return "";
}
/**
* Convert a row of MobileDB data fields into values suitable for use
* as a PortaBase data row.
*
* @param values A row of values from a MobileDB file
* @param types The column type IDs of the PortaBase file being imported into
* @return A row of data formatted correctly for importing into PortaBase
*/
QStringList ImportUtils::convertMobileDBRow(QStringList values, int *types)
{
QStringList result;
int colCount = values.count();
for (int i = 0; i < colCount; i++) {
int type = types[i];
QString value = values[i];
if (type == INTEGER) {
// sometimes (always?) stored like "145."
value = value.replace(QRegExp("\\."), "");
}
else if (type == BOOLEAN) {
if (value == "1" || value == "true" || value == "yes"
|| value == "ja") {
value = "1";
}
else {
value = "0";
}
}
else if (type == DATE) {
bool ok;
int days = value.toInt(&ok);
if (ok) {
QDate date(1904, 1, 1);
date = date.addDays(days);
if (date.isValid()) {
value = QString::number(date.year() * 10000
+ date.month() * 100 + date.day());
}
else {
value = "17520914";
}
}
else {
value = "17520914";
}
}
result.append(value);
}
return result;
}
/**
* Import data from an XML file into a new PortaBase file. The XML file must
* be in the format described at
* http://portabase.sourceforge.net/portabase_xml.html.
*
* @param filename The path to the XML file to be imported
* @param db The PortaBase database to import into
* @return An error message if there was a problem importing the data, an
* empty string otherwise
*/
QString ImportUtils::importXML(const QString &filename, Database *db)
{
QFileInfo info(filename);
db->setImportBasePath(info.absolutePath() + "/");
XMLImport importer(db);
QFile file(filename);
QXmlInputSource source(&file);
QXmlSimpleReader reader;
reader.setContentHandler(&importer);
reader.setErrorHandler(&importer);
reader.parse(source);
return importer.formattedError();
}
/**
* Import lines of text from a file, typically for use as the options of an
* enumerated column type.
*
* @param filename The path of the file to import from
* @param encoding The text encoding to read the file as, such as "Latin-1"
* or "UTF-8"
* @param options The list to be populated with the imported text lines
* @return An error message if there was a problem importing the data, an
* empty string otherwise
*/
QString ImportUtils::importTextLines(const QString &filename, const QString &encoding, QStringList *options)
{
QFile f(filename);
if (!f.open(QFile::ReadOnly | QFile::Text)) {
return QObject::tr("Unable to open file");
}
QTextStream input(&f);
input.setCodec(encoding.toLatin1());
while (!input.atEnd()) {
options->append(input.readLine());
}
f.close();
return "";
}
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