File indexing completed on 2024-06-16 03:42:49

 /*
     SPDX-FileCopyrightText: 2011 SCHUTZ Sacha
     SPDX-FileCopyrightText: 2020-2023 Alexander Semke <alexander.semke@web.de>
 
     SPDX-License-Identifier: MIT
 */
 
 #include "QJsonModel.h"
 #include "backend/lib/trace.h"
 
 #include <QFile>
 #include <QPainter>
 #include <QPalette>
 
 #include <KLocalizedString>
 
 QJsonTreeItem::QJsonTreeItem(QJsonTreeItem* parent)
     : mParent(parent) {
 }
 
 QJsonTreeItem::~QJsonTreeItem() {
     qDeleteAll(mChildren);
 }
 
 void QJsonTreeItem::appendChild(QJsonTreeItem* item) {
     mChildren.append(item);
 }
 
 void QJsonTreeItem::reserve(int size) {
     mChildren.reserve(size);
 }
 
 QJsonTreeItem* QJsonTreeItem::child(int row) {
     return mChildren.value(row);
 }
 
 QJsonTreeItem* QJsonTreeItem::parent() {
     return mParent;
 }
 
 int QJsonTreeItem::childCount() const {
     return mChildren.count();
 }
 
 int QJsonTreeItem::row() const {
     if (mParent)
         return mParent->mChildren.indexOf(const_cast<QJsonTreeItem*>(this));
 
     return 0;
 }
 
 void QJsonTreeItem::setKey(const QString& key) {
     mKey = key;
 }
 
 void QJsonTreeItem::setValue(const QString& value) {
     mValue = value;
 }
 
 void QJsonTreeItem::setType(const QJsonValue::Type type) {
     mType = type;
 }
 
 void QJsonTreeItem::setSize(int size) {
     mSize = size;
 }
 
 const QString& QJsonTreeItem::key() const {
     return mKey;
 }
 
 const QString& QJsonTreeItem::value() const {
     return mValue;
 }
 
 QJsonValue::Type QJsonTreeItem::type() const {
     return mType;
 }
 
 int QJsonTreeItem::size() const {
     return mSize;
 }
 
 QJsonTreeItem* QJsonTreeItem::load(const QJsonValue& value, QJsonTreeItem* parent) {
     auto* rootItem = new QJsonTreeItem(parent);
     //  rootItem->setKey("root");
 
     if (value.isObject()) {
         const auto& object = value.toObject();
 
         // determine the size
         rootItem->setSize(QJsonDocument(object).toJson(QJsonDocument::Compact).size());
 
         // read all children
         for (const QString& key : object.keys()) {
             const QJsonValue& v = object.value(key);
             QJsonTreeItem* child = load(v, rootItem);
             child->setKey(key);
             child->setType(v.type());
             rootItem->appendChild(child);
         }
     } else if (value.isArray()) {
         const auto& array = value.toArray();
         rootItem->setSize(QJsonDocument(array).toJson(QJsonDocument::Compact).size());
 
         int index = 0;
         rootItem->reserve(array.count());
         for (const QJsonValue& v : array) {
             QJsonTreeItem* child = load(v, rootItem);
             child->setKey(QString::number(index));
             child->setType(v.type());
             rootItem->appendChild(child);
             ++index;
         }
     } else {
         const QString& str = value.toVariant().toString();
         rootItem->setValue(str);
         rootItem->setType(value.type());
         rootItem->setSize(str.length());
     }
 
     return rootItem;
 }
 
 //=========================================================================
 
 QJsonModel::QJsonModel(QObject* parent)
     : QAbstractItemModel(parent)
     , mHeadItem(new QJsonTreeItem)
     , mRootItem(new QJsonTreeItem(mHeadItem)) {
     mHeadItem->appendChild(mRootItem);
     mHeaders.append(i18n("Key"));
     mHeaders.append(i18n("Value"));
     mHeaders.append(i18n("Size in Bytes"));
 
     // icons
     QPainter painter;
     QPixmap pix(64, 64);
 
     QFont font;
     font.setPixelSize(60);
 
     const QColor& color = qApp->palette().color(QPalette::Text);
     painter.setPen(QPen(color));
 
     // draw the icon for JSON array
     pix.fill(QColor(Qt::transparent));
     painter.begin(&pix);
     painter.setFont(font);
     painter.drawText(pix.rect(), Qt::AlignCenter, QLatin1String("[ ]"));
     painter.end();
     mArrayIcon = QIcon(pix);
 
     // draw the icon for JSON object
     pix.fill(QColor(Qt::transparent));
     painter.begin(&pix);
     painter.setFont(font);
     painter.drawText(pix.rect(), Qt::AlignCenter, QLatin1String("{ }"));
     painter.end();
     mObjectIcon = QIcon(pix);
 }
 
 QJsonModel::~QJsonModel() {
     // delete mRootItem;
     delete mHeadItem;
 }
 
 void QJsonModel::clear() {
     beginResetModel();
     delete mHeadItem;
     mHeadItem = new QJsonTreeItem;
     mRootItem = new QJsonTreeItem(mHeadItem);
     mHeadItem->appendChild(mRootItem);
     endResetModel();
 }
 
 bool QJsonModel::load(const QString& fileName) {
     QFile file(fileName);
     bool success = false;
     if (file.open(QIODevice::ReadOnly)) {
         success = load(&file);
         file.close();
     } else
         success = false;
 
     return success;
 }
 
 bool QJsonModel::load(QIODevice* device) {
     return loadJson(device->readAll());
 }
 
 bool QJsonModel::loadJson(const QByteArray& json) {
     QJsonParseError jsonError;
 
     const QJsonDocument& doc = QJsonDocument::fromJson(json, &jsonError);
     if (jsonError.error == QJsonParseError::NoError) {
         const bool rc = loadJson(doc);
         if (!rc)
             Q_EMIT error(i18n("Failed to load the JSON file. Empty JSON document."));
         else
             Q_EMIT error(QString());
 
         return rc;
     } else {
         Q_EMIT error(i18n("Failed to load JSON document. Error: %1.", jsonError.errorString()));
         return false;
     }
 }
 
 bool QJsonModel::loadJson(const QJsonDocument& jdoc) {
     PERFTRACE(QStringLiteral("load json document into the model"));
     if (!jdoc.isNull()) {
         beginResetModel();
         delete mHeadItem;
 
         mHeadItem = new QJsonTreeItem;
 
         if (jdoc.isArray()) {
             {
                 PERFTRACE(QStringLiteral("load json tree items"));
                 mRootItem = QJsonTreeItem::load(QJsonValue(jdoc.array()), mHeadItem);
             }
             mRootItem->setType(QJsonValue::Array);
 
         } else {
             mRootItem = QJsonTreeItem::load(QJsonValue(jdoc.object()), mHeadItem);
             mRootItem->setType(QJsonValue::Object);
         }
 
         mHeadItem->appendChild(mRootItem);
 
         endResetModel();
         return true;
     }
 
     return false;
 }
 
 QVariant QJsonModel::data(const QModelIndex& index, int role) const {
     if (!index.isValid())
         return {};
 
     auto* item = static_cast<QJsonTreeItem*>(index.internalPointer());
 
     if (role == Qt::DisplayRole) {
         if (index.column() == 0)
             return item->key();
         else if (index.column() == 1) {
             // in case the value is very long, cut it so the preview tree tree view doesn't explode
             if (item->value().length() > 200)
                 return QString(item->value().left(200) + QStringLiteral(" ..."));
             else
                 return item->value();
         } else {
             if (item->size() != 0)
                 return QString::number(item->size());
             else
                 return {};
         }
     } else if (Qt::EditRole == role) {
         if (index.column() == 1)
             return item->value();
     } else if (role == Qt::DecorationRole) {
         if (index.column() == 0) {
             if (item->type() == QJsonValue::Array)
                 return mArrayIcon;
             else if (item->type() == QJsonValue::Object)
                 return mObjectIcon;
         }
     }
 
     return {};
 }
 
 bool QJsonModel::setData(const QModelIndex& index, const QVariant& value, int role) {
     if (Qt::EditRole == role) {
         if (index.column() == 1) {
             auto* item = static_cast<QJsonTreeItem*>(index.internalPointer());
             item->setValue(value.toString());
             Q_EMIT dataChanged(index, index, {Qt::EditRole});
             return true;
         }
     }
 
     return false;
 }
 
 QVariant QJsonModel::headerData(int section, Qt::Orientation orientation, int role) const {
     if (role == Qt::DisplayRole && orientation == Qt::Horizontal)
         return mHeaders.value(section);
 
     return {};
 }
 
 QModelIndex QJsonModel::index(int row, int column, const QModelIndex& parent) const {
     if (!hasIndex(row, column, parent))
         return QModelIndex{};
 
     QJsonTreeItem* parentItem;
 
     if (!parent.isValid())
         parentItem = mHeadItem;
     else
         parentItem = static_cast<QJsonTreeItem*>(parent.internalPointer());
 
     QJsonTreeItem* childItem = parentItem->child(row);
     if (childItem)
         return createIndex(row, column, childItem);
 
     return {};
 }
 
 QModelIndex QJsonModel::parent(const QModelIndex& index) const {
     if (!index.isValid())
         return QModelIndex{};
 
     auto* childItem = static_cast<QJsonTreeItem*>(index.internalPointer());
     QJsonTreeItem* parentItem = childItem->parent();
 
     if (parentItem == mHeadItem)
         return QModelIndex{};
 
     return createIndex(parentItem->row(), 0, parentItem);
 }
 
 int QJsonModel::rowCount(const QModelIndex& parent) const {
     QJsonTreeItem* parentItem;
     if (parent.column() > 0)
         return 0;
 
     if (!parent.isValid())
         parentItem = mHeadItem;
     else
         parentItem = static_cast<QJsonTreeItem*>(parent.internalPointer());
 
     return parentItem->childCount();
 }
 
 int QJsonModel::columnCount(const QModelIndex& /*parent*/) const {
     return 3;
 }
 
 Qt::ItemFlags QJsonModel::flags(const QModelIndex& index) const {
     if (index.column() == 1)
         return Qt::ItemIsEditable | QAbstractItemModel::flags(index);
     else
         return QAbstractItemModel::flags(index);
 }
 /*
 QJsonDocument QJsonModel::json() const {
     auto v = genJson(mRootItem);
     QJsonDocument doc;
 
     if (v.isObject())
         doc = QJsonDocument(v.toObject());
     else
         doc = QJsonDocument(v.toArray());
 
     return doc;
 }
 */
 QJsonValue QJsonModel::genJson(QJsonTreeItem* item) const {
     auto type = item->type();
     const int nchild = item->childCount();
 
     if (QJsonValue::Object == type) {
         QJsonObject jo;
         for (int i = 0; i < nchild; ++i) {
             auto ch = item->child(i);
             auto key = ch->key();
             jo.insert(key, genJson(ch));
         }
         return jo;
     } else if (QJsonValue::Array == type) {
         QJsonArray arr;
         for (int i = 0; i < nchild; ++i) {
             auto ch = item->child(i);
             arr.append(genJson(ch));
         }
         return arr;
     } else {
         QJsonValue va(item->value());
         return va;
     }
 }
 
 QJsonDocument QJsonModel::genJsonByIndex(const QModelIndex& index) const {
     if (!index.isValid())
         return {};
 
     auto* item = static_cast<QJsonTreeItem*>(index.internalPointer());
     return QJsonDocument::fromVariant(genJson(item).toVariant());
 }