Merge branch 'feature/modelresult' into develop

1 files changed, 251 insertions, 0 deletions

diff --git a/common/modelresult.cpp b/common/modelresult.cpp
new file mode 100644
index 0000000..c7fcd49
--- /dev/null
+++ b/common/modelresult.cpp
@@ -0,0 +1,251 @@
+/*
+ * Copyright (C) 2014 Christian Mollekopf <chrigi_1@fastmail.fm>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) version 3, or any
+ * later version accepted by the membership of KDE e.V. (or its
+ * successor approved by the membership of KDE e.V.), which shall
+ * act as a proxy defined in Section 6 of version 3 of the license.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#include "modelresult.h"
+
+#include <QDebug>
+
+#include "domain/folder.h"
+#include "log.h"
+
+template<class T, class Ptr>
+ModelResult<T, Ptr>::ModelResult(const Akonadi2::Query &query, const QList<QByteArray> &propertyColumns)
+    :QAbstractItemModel(),
+    mPropertyColumns(propertyColumns),
+    mQuery(query)
+{
+}
+
+static qint64 getIdentifier(const QModelIndex &idx)
+{
+    if (!idx.isValid()) {
+        return 0;
+    }
+    return idx.internalId();
+}
+
+template<class T, class Ptr>
+qint64 ModelResult<T, Ptr>::parentId(const Ptr &value)
+{
+    if (!mQuery.parentProperty.isEmpty()) {
+        const auto property = value->getProperty(mQuery.parentProperty).toByteArray();
+        if (!property.isEmpty()) {
+            return qHash(property);
+        }
+    }
+    return 0;
+}
+
+template<class T, class Ptr>
+int ModelResult<T, Ptr>::rowCount(const QModelIndex &parent) const
+{
+    return mTree[getIdentifier(parent)].size();
+}
+
+template<class T, class Ptr>
+int ModelResult<T, Ptr>::columnCount(const QModelIndex &parent) const
+{
+    return mPropertyColumns.size();
+}
+
+template<class T, class Ptr>
+QVariant ModelResult<T, Ptr>::data(const QModelIndex &index, int role) const
+{
+    if (role == DomainObjectRole) {
+        Q_ASSERT(mEntities.contains(index.internalId()));
+        return QVariant::fromValue(mEntities.value(index.internalId()));
+    }
+    if (role == ChildrenFetchedRole) {
+        return childrenFetched(index);
+    }
+    if (role == Qt::DisplayRole) {
+        if (index.column() < mPropertyColumns.size()) {
+            Q_ASSERT(mEntities.contains(index.internalId()));
+            auto entity = mEntities.value(index.internalId());
+            return entity->getProperty(mPropertyColumns.at(index.column())).toString();
+        } else {
+            return "No data available";
+        }
+    }
+    return QVariant();
+}
+
+template<class T, class Ptr>
+QModelIndex ModelResult<T, Ptr>::index(int row, int column, const QModelIndex &parent) const
+{
+    const auto id = getIdentifier(parent);
+    const auto childId = mTree.value(id).at(row);
+    return createIndex(row, column, childId);
+}
+
+template<class T, class Ptr>
+QModelIndex ModelResult<T, Ptr>::createIndexFromId(const qint64 &id) const
+{
+    if (id == 0) {
+        return QModelIndex();
+    }
+    auto grandParentId = mParents.value(id, 0);
+    auto row = mTree.value(grandParentId).indexOf(id);
+    return createIndex(row, 0, id);
+}
+
+template<class T, class Ptr>
+QModelIndex ModelResult<T, Ptr>::parent(const QModelIndex &index) const
+{
+    auto id = getIdentifier(index);
+    auto parentId = mParents.value(id);
+    return createIndexFromId(parentId);
+}
+
+template<class T, class Ptr>
+bool ModelResult<T, Ptr>::hasChildren(const QModelIndex &parent) const
+{
+    if (mQuery.parentProperty.isEmpty() && parent.isValid()) {
+        return false;
+    }
+    return QAbstractItemModel::hasChildren(parent);
+}
+
+template<class T, class Ptr>
+bool ModelResult<T, Ptr>::canFetchMore(const QModelIndex &parent) const
+{
+    return !mEntityChildrenFetched.contains(parent.internalId());
+}
+
+template<class T, class Ptr>
+void ModelResult<T, Ptr>::fetchMore(const QModelIndex &parent)
+{
+    fetchEntities(parent);
+}
+
+template<class T, class Ptr>
+void ModelResult<T, Ptr>::add(const Ptr &value)
+{
+    const auto childId = qHash(value->identifier());
+    const auto id = parentId(value);
+    //Ignore updates we get before the initial fetch is done
+    if (!mEntityChildrenFetched.contains(id)) {
+        return;
+    }
+    auto parent = createIndexFromId(id);
+    // qDebug() << "Added entity " << childId << value->identifier() << id;
+    const auto keys = mTree[id];
+    int index = 0;
+    for (; index < keys.size(); index++) {
+        if (childId < keys.at(index)) {
+            break;
+        }
+    }
+    if (mEntities.contains(childId)) {
+        Warning() << "Entity already in model " << value->identifier();
+        return;
+    }
+    // qDebug() << "Inserting rows " << index << parent;
+    beginInsertRows(parent, index, index);
+    mEntities.insert(childId, value);
+    mTree[id].insert(index, childId);
+    mParents.insert(childId, id);
+    endInsertRows();
+    // qDebug() << "Inserted rows " << mTree[id].size();
+}
+
+
+template<class T, class Ptr>
+void ModelResult<T, Ptr>::remove(const Ptr &value)
+{
+    auto childId = qHash(value->identifier());
+    auto id = parentId(value);
+    auto parent = createIndexFromId(id);
+    // qDebug() << "Removed entity" << childId;
+    auto index = mTree[id].indexOf(qHash(value->identifier()));
+    beginRemoveRows(parent, index, index);
+    mEntities.remove(childId);
+    mTree[id].removeAll(childId);
+    mParents.remove(childId);
+    //TODO remove children
+    endRemoveRows();
+}
+
+template<class T, class Ptr>
+void ModelResult<T, Ptr>::fetchEntities(const QModelIndex &parent)
+{
+    const auto id = getIdentifier(parent);
+    mEntityChildrenFetched.insert(id);
+    Trace() << "Loading child entities";
+    loadEntities(parent.data(DomainObjectRole).template value<Ptr>());
+}
+
+template<class T, class Ptr>
+void ModelResult<T, Ptr>::setFetcher(const std::function<void(const Ptr &parent)> &fetcher)
+{
+    Trace() << "Setting fetcher";
+    loadEntities = fetcher;
+}
+
+template<class T, class Ptr>
+void ModelResult<T, Ptr>::setEmitter(const typename Akonadi2::ResultEmitter<Ptr>::Ptr &emitter)
+{
+    setFetcher(emitter->mFetcher);
+    emitter->onAdded([this](const Ptr &value) {
+        this->add(value);
+    });
+    emitter->onModified([this](const Ptr &value) {
+        this->modify(value);
+    });
+    emitter->onRemoved([this](const Ptr &value) {
+        this->remove(value);
+    });
+    emitter->onInitialResultSetComplete([this](const Ptr &parent) {
+        const qint64 parentId = parent ? qHash(parent->identifier()) : 0;
+        const auto parentIndex = createIndexFromId(parentId);
+        mEntityChildrenFetchComplete.insert(parentId);
+        emit dataChanged(parentIndex, parentIndex, QVector<int>() << ChildrenFetchedRole);
+    });
+    mEmitter = emitter;
+}
+
+template<class T, class Ptr>
+bool ModelResult<T, Ptr>::childrenFetched(const QModelIndex &index) const
+{
+    return mEntityChildrenFetchComplete.contains(getIdentifier(index));
+}
+
+template<class T, class Ptr>
+void ModelResult<T, Ptr>::modify(const Ptr &value)
+{
+    auto childId = qHash(value->identifier());
+    auto id = parentId(value);
+    //Ignore updates we get before the initial fetch is done
+    if (!mEntityChildrenFetched.contains(id)) {
+        return;
+    }
+    auto parent = createIndexFromId(id);
+    // qDebug() << "Modified entity" << childId;
+    auto i = mTree[id].indexOf(childId);
+    mEntities.remove(childId);
+    mEntities.insert(childId, value);
+    //TODO check for change of parents
+    auto idx = index(i, 0, parent);
+    emit dataChanged(idx, idx);
+}
+
+template class ModelResult<Akonadi2::ApplicationDomain::Folder, Akonadi2::ApplicationDomain::Folder::Ptr>;
+template class ModelResult<Akonadi2::ApplicationDomain::Mail, Akonadi2::ApplicationDomain::Mail::Ptr>;
+template class ModelResult<Akonadi2::ApplicationDomain::Event, Akonadi2::ApplicationDomain::Event::Ptr>;
+template class ModelResult<Akonadi2::ApplicationDomain::AkonadiResource, Akonadi2::ApplicationDomain::AkonadiResource::Ptr>;