Refactor Addressbook

src/addressbook.cpp

@@ -18,22 +18,23 @@ AddressBookModel::~AddressBookModel() {
 }
 
 void AddressBookModel::saveData() {
-    AddressBook::writeToStorage(labels);
-
     // Save column positions
     QSettings().setValue("addresstablegeometry", parent->horizontalHeader()->saveState());
 }
 
 
 void AddressBookModel::loadData() {        
-    labels = AddressBook::readFromStorage();
+    labels = AddressBook::getInstance()->getAllAddressLabels();
 
     parent->horizontalHeader()->restoreState(QSettings().value("addresstablegeometry").toByteArray());
 }
 
 void AddressBookModel::addNewLabel(QString label, QString addr) {
-    labels.push_back(QPair<QString, QString>(label, addr));
-    AddressBook::writeToStorage(labels);
+    //labels.push_back(QPair<QString, QString>(label, addr));
+    AddressBook::getInstance()->addAddressLabel(label, addr);
+
+    labels.clear();
+    labels = AddressBook::getInstance()->getAllAddressLabels();
 
     dataChanged(index(0, 0), index(labels.size()-1, columnCount(index(0,0))-1));
     layoutChanged();
@@ -43,9 +44,10 @@ void AddressBookModel::removeItemAt(int row) {
     if (row >= labels.size())
         return;
 
-    labels.removeAt(row);
-    AddressBook::writeToStorage(labels);
-
+    AddressBook::getInstance()->removeAddressLabel(labels[row].first, labels[row].second);
+    
+    labels.clear();
+    labels = AddressBook::getInstance()->getAllAddressLabels();
 
     dataChanged(index(0, 0), index(labels.size()-1, columnCount(index(0,0))-1));
     layoutChanged();
@@ -86,6 +88,10 @@ QVariant AddressBookModel::headerData(int section, Qt::Orientation orientation,
     return QVariant();
 }
 
+
+//===============
+// AddressBook
+//===============
 void AddressBook::open(MainWindow* parent, QLineEdit* target) {
     QDialog d(parent);
     Ui_addressBook ab;
@@ -180,31 +186,41 @@ void AddressBook::open(MainWindow* parent, QLineEdit* target) {
     };
 }
 
-QList<QPair<QString, QString>> AddressBook::readFromStorage() {
+//=============
+// AddressBook singleton class
+//=============
+AddressBook* AddressBook::getInstance() {
+    if (!instance)
+        instance = new AddressBook();
+
+    return instance;
+}
+
+AddressBook::AddressBook() {
+    readFromStorage();
+}
+
+void AddressBook::readFromStorage() {
     QFile file(AddressBook::writeableFile());
-    
-    QList<QPair<QString, QString>> labels;    
 
     if (!file.exists()) {
-        return labels;
+        return;
     }
 
+    allLabels.clear();
     file.open(QIODevice::ReadOnly);
     QDataStream in(&file);    // read the data serialized from the file
     QString version;
-    in >> version >> labels; 
+    in >> version >> allLabels; 
 
     file.close();
-
-    return labels;
 }
 
-
-void AddressBook::writeToStorage(QList<QPair<QString, QString>> labels) {
+void AddressBook::writeToStorage() {
     QFile file(AddressBook::writeableFile());
     file.open(QIODevice::ReadWrite | QIODevice::Truncate);
     QDataStream out(&file);   // we will serialize the data into the file
-    out << QString("v1") << labels;
+    out << QString("v1") << allLabels;
     file.close();
 }
 
@@ -221,3 +237,40 @@ QString AddressBook::writeableFile() {
         return dir.filePath(filename);
     }
 }
+
+
+// Add a new address/label to the database
+void AddressBook::addAddressLabel(QString label, QString address) {
+    Q_ASSERT(Settings::isValidAddress(address));
+
+    allLabels.push_back(QPair<QString, QString>(label, address));
+    writeToStorage();
+}
+
+// Remove a new address/label from the database
+void AddressBook::removeAddressLabel(QString label, QString address) {
+    // Iterate over the list and remove the label/address
+    for (int i=0; i < allLabels.size(); i++) {
+        if (allLabels[i].first == label && allLabels[i].second == address)
+            allLabels.removeAt(i);
+            writeToStorage();
+            return;
+    }
+}
+
+// Read all addresses
+const QList<QPair<QString, QString>>& AddressBook::getAllAddressLabels() {
+    return allLabels;
+}
+
+// Get the label for an address
+QString AddressBook::getLabelForAddress(QString addr) {
+    for (auto i : allLabels) {
+        if (i.second == addr)
+            return i.first;
+    }
+
+    return "";
+}
+
+AddressBook* AddressBook::instance = nullptr;

src/addressbook.h

@@ -31,12 +31,32 @@ private:
 
 class AddressBook {
 public:    
+    // Method that opens the AddressBook dialog window. 
     static void open(MainWindow* parent, QLineEdit* target = nullptr);
 
-    static QList<QPair<QString, QString>> readFromStorage();
-    static void writeToStorage(QList<QPair<QString, QString>> labels);
+    static AddressBook* getInstance(); 
 
-    static QString writeableFile();
+    // Add a new address/label to the database
+    void addAddressLabel(QString label, QString address);
+
+    // Remove a new address/label from the database
+    void removeAddressLabel(QString label, QString address);
+
+    // Read all addresses
+    const QList<QPair<QString, QString>>& getAllAddressLabels();
+
+    // Get an address's first label
+    QString getLabelForAddress(QString address);
+private:
+    AddressBook();
+
+    void readFromStorage();
+    void writeToStorage();
+
+    QString writeableFile();
+    QList<QPair<QString, QString>> allLabels;
+
+    static AddressBook* instance;
 };
 
 #endif // ADDRESSBOOK_H

src/mainwindow.h

@@ -97,8 +97,6 @@ private:
 
     void restoreSavedStates();
 
-    QString addressFromAddressField(const QString& lblAddr) { return lblAddr.trimmed().split("/").last(); }
-
     RPC*         rpc  = nullptr;
     QCompleter*  labelCompleter = nullptr;
 

src/sendtab.cpp

@@ -92,7 +92,7 @@ void MainWindow::setupSendTab() {
 
 void MainWindow::updateLabelsAutoComplete() {
     QList<QString> list;
-    auto labels = AddressBook::readFromStorage();
+    auto labels = AddressBook::getInstance()->getAllAddressLabels();
     
     std::transform(labels.begin(), labels.end(), std::back_inserter(list), [=] (auto la) -> QString {
         return la.first % "/" % la.second;
@@ -244,7 +244,7 @@ void MainWindow::addAddressSection() {
 }
 
 void MainWindow::addressChanged(int itemNumber, const QString& text) {   
-    auto addr = addressFromAddressField(text);
+    auto addr = Settings::addressFromAddressLabel(text);
     setMemoEnabled(itemNumber, addr.startsWith("z"));
 }
 
@@ -267,7 +267,7 @@ void MainWindow::setMemoEnabled(int number, bool enabled) {
 void MainWindow::memoButtonClicked(int number) {
     // Memos can only be used with zAddrs. So check that first
     auto addr = ui->sendToWidgets->findChild<QLineEdit*>(QString("Address") + QString::number(number));
-    if (!addressFromAddressField(addr->text()).startsWith("z")) {
+    if (!Settings::addressFromAddressLabel(addr->text()).startsWith("z")) {
         QMessageBox msg(QMessageBox::Critical, "Memos can only be used with z-addresses",
         "The memo field can only be used with a z-address.\n" + addr->text() + "\ndoesn't look like a z-address",
         QMessageBox::Ok, this);
@@ -357,7 +357,7 @@ void MainWindow::maxAmountChecked(int checked) {
         }
         sumAllAmounts += Settings::getTotalFee();
 
-        auto addr = ui->inputsCombo->currentText().split("(")[0];
+        auto addr = Settings::addressFromAddressLabel(ui->inputsCombo->currentText().split("(")[0]);
 
         auto maxamount  = rpc->getAllBalances()->value(addr) - sumAllAmounts;
         maxamount       = (maxamount < 0) ? 0 : maxamount;
@@ -380,7 +380,7 @@ Tx MainWindow::createTxFromSendPage() {
     for (int i=0; i < totalItems; i++) {
         QString addr = ui->sendToWidgets->findChild<QLineEdit*>(QString("Address") % QString::number(i+1))->text().trimmed();
         // Remove label if it exists
-        addr = addressFromAddressField(addr);
+        addr = Settings::addressFromAddressLabel(addr);
 
         double  amt  = ui->sendToWidgets->findChild<QLineEdit*>(QString("Amount")  % QString::number(i+1))->text().trimmed().toDouble();        
         QString memo = ui->sendToWidgets->findChild<QLabel*>(QString("MemoTxt")  % QString::number(i+1))->text().trimmed();

src/settings.cpp

@@ -205,3 +205,7 @@ bool Settings::isValidAddress(QString addr) {
     return  zcexp.exactMatch(addr)  || texp.exactMatch(addr) || 
             ztsexp.exactMatch(addr) || zsexp.exactMatch(addr);
 }
+
+QString Settings::addressFromAddressLabel(const QString& lblAddr) { 
+    return lblAddr.trimmed().split("/").last(); 
+}

src/settings.h

@@ -72,6 +72,8 @@ public:
     static double  getTotalFee();
     
     static bool    isValidAddress(QString addr);
+    static QString addressFromAddressLabel(const QString& lblAddr);
+    static QString addressLabelFromAddress(const QString& addr);
 
     static const int     updateSpeed         = 20 * 1000;        // 20 sec
     static const int     quickUpdateSpeed    = 5  * 1000;        // 5 sec