start implementing model for koto artist

desktop/datalake/models.cpp

@@ -0,0 +1,45 @@
+#include "structs.hpp"
+
+KotoArtistModel::~KotoArtistModel() {
+  this->beginResetModel();
+  this->m_artists.clear();
+  this->endResetModel();
+}
+
+void KotoArtistModel::addArtist(KotoArtist* artist) {
+  this->beginInsertRows(QModelIndex(), this->m_artists.count(), this->m_artists.count());
+  this->m_artists.append(artist);
+  this->endInsertRows();
+}
+
+int KotoArtistModel::rowCount(const QModelIndex& parent) const {
+  return this->m_artists.count();
+}
+
+QVariant KotoArtistModel::data(const QModelIndex& index, int role) const {
+  if (!index.isValid()) { return {}; }
+
+  if (index.row() >= this->m_artists.size()) { return {}; }
+
+  if (role == KotoArtistRoles::NameRole) {
+    return this->m_artists.at(index.row())->getName();
+  } else if (role == KotoArtistRoles::PathRole) {
+    return this->m_artists.at(index.row())->getPath();
+  } else if (role == KotoArtistRoles::UuidRole) {
+    return this->m_artists.at(index.row())->uuid;
+  } else {
+    return {};
+  }
+}
+
+QList<KotoArtist*> KotoArtistModel::getArtists() {
+  return this->m_artists;
+}
+
+QHash<int, QByteArray> KotoArtistModel::roleNames() const {
+  QHash<int, QByteArray> roles;
+  roles[NameRole] = QByteArrayLiteral("name");
+  roles[PathRole] = QByteArrayLiteral("path");
+  roles[UuidRole] = QByteArrayLiteral("uuid");
+  return roles;
+}