Update geometry (feature service)

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// [WriteFile Name=UpdateGeometryFeatureService, Category=EditData]
// [Legal]
// Copyright 2016 Esri.

// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// http://www.apache.org/licenses/LICENSE-2.0

// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// [Legal]

#ifdef PCH_BUILD
#include "pch.hpp"
#endif // PCH_BUILD

#include "UpdateGeometryFeatureService.h"

#include "Map.h"
#include "MapQuickView.h"
#include "Basemap.h"
#include "Viewpoint.h"
#include "Point.h"
#include "SpatialReference.h"
#include "ServiceFeatureTable.h"
#include "FeatureLayer.h"
#include "Feature.h"
#include "FeatureEditResult.h"
#include "MapViewTypes.h"
#include "MapTypes.h"
#include "LayerListModel.h"
#include "IdentifyLayerResult.h"

#include <QFuture>
#include <QUrl>
#include <QMouseEvent>
#include <QList>

using namespace Esri::ArcGISRuntime;

namespace
{
  // Convenience RAII struct that deletes all pointers in given container.
  struct FeatureEditListResultLock
  {
    FeatureEditListResultLock(const QList<FeatureEditResult*>& list) : results(list) { }
    ~FeatureEditListResultLock() { qDeleteAll(results); }
    const QList<FeatureEditResult*>& results;
  };
}

UpdateGeometryFeatureService::UpdateGeometryFeatureService(QQuickItem* parent) :
  QQuickItem(parent)
{
}

UpdateGeometryFeatureService::~UpdateGeometryFeatureService() = default;
void UpdateGeometryFeatureService::init()
{
  qmlRegisterType<MapQuickView>("Esri.Samples", 1, 0, "MapView");
  qmlRegisterType<UpdateGeometryFeatureService>("Esri.Samples", 1, 0, "UpdateGeometryFeatureServiceSample");
}

void UpdateGeometryFeatureService::componentComplete()
{
  QQuickItem::componentComplete();

  // find QML MapView component
  m_mapView = findChild<MapQuickView*>("mapView");
  m_mapView->setWrapAroundMode(WrapAroundMode::Disabled);

  // create a Map by passing in the Basemap
  m_map = new Map(BasemapStyle::ArcGISStreets, this);
  m_map->setInitialViewpoint(Viewpoint(Point(-10800000, 4500000, SpatialReference(102100)), 3e7));

  // set map on the map view
  m_mapView->setMap(m_map);

  // create the ServiceFeatureTable
  m_featureTable = new ServiceFeatureTable(QUrl("https://sampleserver6.arcgisonline.com/arcgis/rest/services/DamageAssessment/FeatureServer/0"), this);

  // create the FeatureLayer with the ServiceFeatureTable and add it to the Map
  m_featureLayer = new FeatureLayer(m_featureTable, this);
  m_map->operationalLayers()->append(m_featureLayer);

  connectSignals();
}

void UpdateGeometryFeatureService::connectSignals()
{
  // connect to the mouse clicked signal on the MapQuickView
  connect(m_mapView, &MapQuickView::mouseClicked, this, [this](QMouseEvent& mouseEvent)
  {
    // get the point from the mouse point
    Point mapPoint = m_mapView->screenToLocation(mouseEvent.position().x(), mouseEvent.position().y());

    // if a feature is already selected, move the selected feature to the new geometry
    if (m_featureSelected)
    {
      // set the selected feature's geometry to the tapped map point
      m_selectedFeature->setGeometry(mapPoint);

      // update the feature table with the new feature
      m_featureTable->updateFeatureAsync(m_selectedFeature).then(this, [this]()
      {
        // once updateFeatureAsync is done, call applyEditsAsync
        m_featureTable->applyEditsAsync().then(this, [](const QList<FeatureEditResult*>& featureEditResults)
        {
          // Lock is a convenience wrapper that deletes the contents of featureEditResults when we leave scope.
          FeatureEditListResultLock lock(featureEditResults);

          // obtain the first item in the list
          FeatureEditResult* featureEditResult = lock.results.isEmpty() ? nullptr : lock.results.first();
          // check if there were errors, and if not, log the new object ID
          if (featureEditResult && !featureEditResult->isCompletedWithErrors())
            qDebug() << "Successfully updated geometry for Object ID:" << featureEditResult->objectId();
          else
            qDebug() << "Apply edits error.";
        });
      });

      // reset the feature layer
      m_featureLayer->clearSelection();
      m_featureSelected = false;
    }

    // else select a new feature
    else
    {
      // first clear the selection
      m_featureLayer->clearSelection();

      // call identify on the map view
      m_mapView->identifyLayerAsync(m_featureLayer, mouseEvent.position(), 5, false, 1).then(this, [this](IdentifyLayerResult* identifyResult)
      {
        // process the identifyLayerAsync result from the future
        if (!identifyResult)
          return;

        if (identifyResult->geoElements().size() > 0)
        {
          // first delete if not nullptr
          if (m_selectedFeature)
            delete m_selectedFeature;

          m_selectedFeature = static_cast<Feature*>(identifyResult->geoElements().at(0));
          // Prevent the feature from being deleted along with the identifyResult.
          m_selectedFeature->setParent(this);

          // select the item in the result
          m_featureLayer->selectFeature(m_selectedFeature);
          m_featureSelected = true;
        }
      });
    }
  });
}