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/*
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.
*/
#include <QString>
#include <QSqlQuery>
#include <QSqlError>
#include <QDebug>
#include "listmodel.h"
#include "listitem.h"
ListModel::ListModel(const QString table, QObject *parent) : QAbstractItemModel(parent), mTable(table){
QString updateQuery = QString("UPDATE %1 SET t%1name = :name WHERE i%1id = :id").arg(mTable);
mUpdateQuery = new QSqlQuery;
mUpdateQuery->prepare(updateQuery);
QString insertQuery = QString("INSERT INTO %1 (t%1name) VALUES(:name)").arg(mTable);
mInsertQuery = new QSqlQuery;
mInsertQuery->prepare(insertQuery);
QString deleteQuery = QString("DELETE FROM %1 WHERE t%1name = :name").arg(mTable);
mDeleteQuery = new QSqlQuery;
mDeleteQuery->prepare(deleteQuery);
QString idQuery = QString("SELECT i%1id FROM %1 WHERE t%1name = :name").arg(mTable);
mIdQuery = new QSqlQuery;
mIdQuery->prepare(idQuery);
populate();
}
ListModel::~ListModel(){
qDeleteAll(mItems);
}
QModelIndex ListModel::index(int row, int column, const QModelIndex &) const{
if((column != 0) || (row >= mItems.size()) || (row < 0)){
return QModelIndex();
}
return createIndex(row, 0, mItems.at(row));
}
QModelIndex ListModel::index(const QVariant &data) const{
for(int i = 0; i < rowCount(); ++i){
ListItem *item = mItems.at(i);
if(data.toString() == item->name()){
return createIndex(i, 0, item);
}
}
return QModelIndex();
}
int ListModel::rowCount(const QModelIndex &) const{
return mItems.size();
}
QVariant ListModel::data(const QModelIndex &index, int role) const{
if(!index.isValid()){
return QVariant();
}
if(index.column() > 0){
return QVariant();
}
if(index.row() > mItems.size()){
return QVariant();
}
ListItem *item = static_cast<ListItem*>(index.internalPointer());
Q_ASSERT(item != 0);
switch (role){
case Qt::DisplayRole:
return item->name();
break;
case IdRole:
return item->id();
}
return QVariant();
}
bool ListModel::insertRows(int row, int count, const QModelIndex &){
beginInsertRows(QModelIndex(), row, row + count - 1);
for(int i = row; i < (row + count); ++i){
ListItem *newItem = new ListItem(QString(), -1);
mItems.insert(i, newItem);
}
endInsertRows();
return true;
}
bool ListModel::removeRows(int row, int count, const QModelIndex&){
if(row > mItems.size()){
return false;
}
if((row + count) > rowCount()){
return false;
}
beginRemoveRows(QModelIndex(), row, row + (count - 1));
for(int i = row; i < (row + count); ++i){
ListItem *delItem = mItems.at(i);
delete delItem;
mItems.removeAt(i);
}
endRemoveRows();
return true;
}
bool ListModel::setData(const QModelIndex &idx, const QVariant &data, int role){
if((!idx.isValid()) || (role != Qt::EditRole) || (idx.column() != 0)){
return false;
}
ListItem *item = static_cast<ListItem*>(idx.internalPointer());
Q_ASSERT(item != 0);
int id = item->id();
bool success = false;
if(id > -1){
//this is an update
mUpdateQuery->bindValue(":id", id);
success = mUpdateQuery->exec();
}else{
//this is an insert
mInsertQuery->bindValue(":name", data);
success = mInsertQuery->exec();
if(success){
mIdQuery->bindValue(":name", data);
success = mIdQuery->exec();
int count = 0;
while(mIdQuery->next()){
id = mIdQuery->value(0).toInt();
++count;
}
Q_ASSERT(count == 1);
item->setName(data.toString());
item->setId(id);
}
}
if(success){
qSort(mItems.begin(), mItems.end(), sortListItems);
dataChanged(index(0, 0), index((mItems.size() - 1), 0));
}
return success;
}
bool ListModel::addItem(const QVariant &item){
bool success = false;
if(insertRows(0, 1, QModelIndex())){
QModelIndex idx = index(0, 0);
if(idx.isValid()){
success = setData(idx, item, Qt::EditRole);
}
}
return success;
}
bool ListModel::removeItem(const QVariant &item){
QString text = item.toString();
int rowToDelete = -1;
for(int row = 0; row < rowCount(); ++row){
QString data = index(row, 0).data().toString();
if(data == text){
rowToDelete = row;
break;
}
}
if(rowToDelete == -1){
return false;
}
mDeleteQuery->bindValue(":name", item.toString());
bool success = mDeleteQuery->exec();
if(success){
success = removeRows(rowToDelete, 1, QModelIndex());
}
return success;
}
bool ListModel::renameItem(const QVariant &oldName, const QVariant &newName){
QModelIndex idx = QModelIndex();
bool success = false;
for(int i = 0; i < rowCount(); ++i){
idx = index(i, 0);
if(idx.data().toString() == oldName.toString()){
success = setData(idx, newName);
}
}
return success;
}
int ListModel::defaultId(){
if(!mItems.isEmpty()){
return mItems.at(0)->id();
}
addItem("(default)");
return mItems.at(0)->id();
}
void ListModel::populate(){
QString query = QString("SELECT i%1id, t%1name FROM %1 ORDER BY t%1name").arg(mTable);
QSqlQuery q(query);
while(q.next()){
ListItem *newItem = new ListItem(q.value(1).toString(), q.value(0).toInt());
mItems << newItem;
}
}
bool sortListItems(const ListItem *lhs, const ListItem *rhs){
return lhs->name().toLower() < rhs->name().toLower();
}
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