Complete Phase 4: Basic UI with QML - MailListPage with folder/email navigation, models connected to DAOs, placeholder pages for Calendar/Contacts/Settings

src/ui/models/EmailListModel.cpp

@@ -0,0 +1,98 @@
+#include "EmailListModel.h"
+#include <QDebug>
+#include <QDateTime>
+
+EmailListModel::EmailListModel(QObject *parent)
+    : QAbstractListModel(parent),
+      m_mailItemDao(MailItemDao::instance())
+{
+    refresh();
+}
+
+int EmailListModel::rowCount(const QModelIndex &parent) const
+{
+    if (parent.isValid())
+        return 0;
+    return m_emails.size();
+}
+
+QVariant EmailListModel::data(const QModelIndex &index, int role) const
+{
+    if (!index.isValid() || index.row() >= m_emails.size())
+        return QVariant();
+
+    const MailItem& item = m_emails.at(index.row());
+
+    switch (role) {
+    case IdRole:
+        return item.id();
+    case SubjectRole:
+        return item.subject();
+    case SenderRole:
+        return item.sender();
+    case RecipientRole:
+        return item.recipient();
+    case DateRole:
+        return item.date();
+    case ReadRole:
+        return item.isRead();
+    case FlaggedRole:
+        return item.isFlagged();
+    case AttachmentsRole:
+        return QVariant::fromValue(item.attachments());
+    case FileIdRole:
+        return item.fileId();
+    case SizeRole:
+        return item.size();
+    case MessageIdRole:
+        return item.messageId();
+    case SenderInitialRole: {
+        QString sender = item.sender();
+        if (sender.isEmpty())
+            return QString();
+        // Get first character, or first non-space character?
+        // Simple: first character of the sender string
+        return QString(sender.at(0)).toUpper();
+    }
+    default:
+        return QVariant();
+    }
+}
+
+QHash<int, QByteArray> EmailListModel::roleNames() const
+{
+    QHash<int, QByteArray> roles;
+    roles[IdRole] = "id";
+    roles[SubjectRole] = "subject";
+    roles[SenderRole] = "sender";
+    roles[RecipientRole] = "recipient";
+    roles[DateRole] = "date";
+    roles[ReadRole] = "read";
+    roles[FlaggedRole] = "flagged";
+    roles[AttachmentsRole] = "attachments";
+    roles[FileIdRole] = "fileId";
+    roles[SizeRole] = "size";
+    roles[MessageIdRole] = "messageId";
+    roles[SenderInitialRole] = "senderInitial";
+    return roles;
+}
+
+void EmailListModel::setFolderId(int folderId)
+{
+    if (m_folderId == folderId)
+        return;
+    m_folderId = folderId;
+    refresh();
+}
+
+void EmailListModel::refresh()
+{
+    beginResetModel();
+    if (m_folderId == -1) {
+        m_emails = m_mailItemDao.findAll();
+    } else {
+        m_emails = m_mailItemDao.findByFolderId(m_folderId);
+    }
+    endResetModel();
+    qDebug() << "EmailListModel refreshed with" << m_emails.size() << "emails for folderId" << m_folderId;
+}

src/ui/models/EmailListModel.h

@@ -0,0 +1,46 @@
+#ifndef EMAILLISTMODEL_H
+#define EMAILLISTMODEL_H
+
+#include <QAbstractListModel>
+#include <QHash>
+#include <QByteArray>
+#include "../db/dao/mailitemdao.h"
+
+class EmailListModel : public QAbstractListModel
+{
+    Q_OBJECT
+public:
+    explicit EmailListModel(QObject *parent = nullptr);
+    ~EmailListModel() override = default;
+
+    enum EmailRoles {
+        IdRole = Qt::UserRole + 1,
+        SubjectRole,
+        SenderRole,
+        RecipientRole,
+        DateRole,
+        ReadRole,
+        FlaggedRole,
+        AttachmentsRole,
+        FileIdRole,
+        SizeRole,
+        MessageIdRole,
+        SenderInitialRole // computed from sender
+    };
+
+    int rowCount(const QModelIndex &parent = QModelIndex()) const override;
+    QVariant data(const QModelIndex &index, int role = Qt::DisplayRole) const override;
+    QHash<int, QByteArray> roleNames() const override;
+
+    // Set the folderId to filter emails; -1 means all folders
+    void setFolderId(int folderId);
+    // Refresh the model from the database based on current folderId
+    void refresh();
+
+private:
+    QVector<MailItem> m_emails;
+    int m_folderId{-1}; // -1 means all folders
+    MailItemDao& m_mailItemDao;
+};
+
+#endif // EMAILLISTMODEL_H