TopicGrid.java

/*
 * Copyright 2014-2016 CyberVision, Inc.
 *
 * 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.
 */

package org.kaaproject.kaa.server.admin.client.mvp.view.topic;

import com.google.gwt.dom.client.Style.Unit;
import com.google.gwt.safehtml.shared.SafeHtml;
import com.google.gwt.safehtml.shared.SafeHtmlUtils;
import com.google.gwt.user.cellview.client.Column;
import com.google.gwt.user.cellview.client.DataGrid;
import com.google.gwt.user.cellview.client.Header;
import com.google.gwt.user.cellview.client.SafeHtmlHeader;

import org.kaaproject.avro.ui.gwt.client.widget.grid.cell.ActionButtonCell;
import org.kaaproject.avro.ui.gwt.client.widget.grid.cell.ActionButtonCell.ActionListener;
import org.kaaproject.avro.ui.gwt.client.widget.grid.cell.ActionButtonCell.ActionValidator;
import org.kaaproject.avro.ui.gwt.client.widget.grid.event.RowActionEvent;
import org.kaaproject.kaa.common.dto.TopicDto;
import org.kaaproject.kaa.common.dto.TopicTypeDto;
import org.kaaproject.kaa.server.admin.client.mvp.view.grid.AbstractKaaGrid;
import org.kaaproject.kaa.server.admin.client.mvp.view.grid.KaaRowAction;
import org.kaaproject.kaa.server.admin.client.util.Utils;

import java.util.Comparator;

public class TopicGrid extends AbstractKaaGrid<TopicDto, String> {

  private Column<TopicDto, TopicDto> sendNotificationColumn;

  public TopicGrid(boolean embedded) {
    super(Unit.PX, true, embedded);
  }

  public TopicGrid(boolean enableActions, boolean embedded) {
    super(Unit.PX, enableActions, embedded);
  }

  @Override
  protected float constructColumnsImpl(DataGrid<TopicDto> table) {
    float prefWidth = 0;

    prefWidth += constructStringColumn(table,
        Utils.constants.name(),
        new StringValueProvider<TopicDto>() {
          @Override
          public String getValue(TopicDto item) {
            return item.getName();
          }
        },
        new Comparator<TopicDto>() {
          @Override
          public int compare(TopicDto o1, TopicDto o2) {
            return o1.getName().compareToIgnoreCase(o2.getName());
          }
        },
        Boolean.TRUE,
        !embedded, 80);
    prefWidth += constructBooleanColumn(table,
        Utils.constants.mandatory(),
        new BooleanValueProvider<TopicDto>() {
          @Override
          public Boolean getValue(TopicDto item) {
            return item.getType() == TopicTypeDto.MANDATORY;
          }
        }, 40);
    if (!embedded) {
      prefWidth += constructStringColumn(table,
          Utils.constants.author(),
          new StringValueProvider<TopicDto>() {
            @Override
            public String getValue(TopicDto item) {
              return item.getCreatedUsername();
            }
          }, 80);

      prefWidth += constructStringColumn(table,
          Utils.constants.dateCreated(),
          new StringValueProvider<TopicDto>() {
            @Override
            public String getValue(TopicDto item) {
              return Utils.millisecondsToDateString(item.getCreatedTime());
            }
          }, 80);
    }
    return prefWidth;
  }

  @Override
  protected float constructActions(DataGrid<TopicDto> table, float prefWidth) {
    if (enableActions) {
      float result = 0;
      if (!embedded
          && (sendNotificationColumn == null
          || table.getColumnIndex(sendNotificationColumn) == -1)) {
        Header<SafeHtml> sendNotificationHeader = new SafeHtmlHeader(
            SafeHtmlUtils.fromSafeConstant(Utils.constants.sendNotification()));

        sendNotificationColumn = constructSendNotificationColumn("");
        table.addColumn(sendNotificationColumn, sendNotificationHeader);
        table.setColumnWidth(sendNotificationColumn, 40, Unit.PX);
        result += 40;
      }
      if (deleteColumn == null || table.getColumnIndex(deleteColumn) == -1) {
        Header<SafeHtml> deleteHeader = new SafeHtmlHeader(
            SafeHtmlUtils.fromSafeConstant(embedded
                ? Utils.constants.remove()
                : Utils.constants.delete()));

        deleteColumn = constructDeleteColumn("");
        table.addColumn(deleteColumn, deleteHeader);
        table.setColumnWidth(deleteColumn, 40, Unit.PX);
        result += 40;
      }

      return result;
    } else {
      return 0;
    }
  }

  @Override
  protected String deleteQuestion() {
    if (embedded) {
      return Utils.messages.removeTopicFromEndpointGroupQuestion();
    } else {
      return super.deleteQuestion();
    }
  }

  @Override
  protected String deleteTitle() {
    if (embedded) {
      return Utils.messages.removeTopicFromEndpointGroupTitle();
    } else {
      return super.deleteTitle();
    }
  }

  private Column<TopicDto, TopicDto> constructSendNotificationColumn(String text) {
    ActionButtonCell<TopicDto> cell = new ActionButtonCell<TopicDto>(Utils.resources.send(),
        text, embedded,
        new ActionListener<TopicDto>() {
          @Override
          public void onItemAction(TopicDto value) {
            sendNotification(value);
          }
        },
        new ActionValidator<TopicDto>() {
          @Override
          public boolean canPerformAction(TopicDto value) {
            return !embedded;
          }
        }
    );
    Column<TopicDto, TopicDto> column = new Column<TopicDto, TopicDto>(cell) {
      @Override
      public TopicDto getValue(TopicDto item) {
        return item;
      }
    };
    return column;
  }

  private void sendNotification(TopicDto value) {
    RowActionEvent<String> rowSendNotificationEvent = new RowActionEvent<>(
            value.getId(), KaaRowAction.SEND_NOTIFICATION);
    fireEvent(rowSendNotificationEvent);
  }

}