OsUsersView.java

/*
** Module   : OsUsersView.java
** Abstract : OsUsersView is a view to manage OS user accounts.
**
** Copyright (c) 2023, Golden Code Development Corporation.
**
** -#- -I- --Date-- ----------------Description----------------------
** 001 GBB 20230807 Created initial version.
*/
/*
** This program is free software: you can redistribute it and/or modify
** it under the terms of the GNU Affero General Public License as
** published by the Free Software Foundation, either version 3 of the
** License, or (at your option) any later version.
**
** This program 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 Affero General Public License for more details.
**
** You may find a copy of the GNU Affero GPL version 3 at the following
** location: https://www.gnu.org/licenses/agpl-3.0.en.html
** 
** Additional terms under GNU Affero GPL version 3 section 7:
** 
**   Under Section 7 of the GNU Affero GPL version 3, the following additional
**   terms apply to the works covered under the License.  These additional terms
**   are non-permissive additional terms allowed under Section 7 of the GNU
**   Affero GPL version 3 and may not be removed by you.
** 
**   0. Attribution Requirement.
** 
**     You must preserve all legal notices or author attributions in the covered
**     work or Appropriate Legal Notices displayed by works containing the covered
**     work.  You may not remove from the covered work any author or developer
**     credit already included within the covered work.
** 
**   1. No License To Use Trademarks.
** 
**     This license does not grant any license or rights to use the trademarks
**     Golden Code, FWD, any Golden Code or FWD logo, or any other trademarks
**     of Golden Code Development Corporation. You are not authorized to use the
**     name Golden Code, FWD, or the names of any author or contributor, for
**     publicity purposes without written authorization.
** 
**   2. No Misrepresentation of Affiliation.
** 
**     You may not represent yourself as Golden Code Development Corporation or FWD.
** 
**     You may not represent yourself for publicity purposes as associated with
**     Golden Code Development Corporation, FWD, or any author or contributor to
**     the covered work, without written authorization.
** 
**   3. No Misrepresentation of Source or Origin.
** 
**     You may not represent the covered work as solely your work.  All modified
**     versions of the covered work must be marked in a reasonable way to make it
**     clear that the modified work is not originating from Golden Code Development
**     Corporation or FWD.  All modified versions must contain the notices of
**     attribution required in this license.
*/
package com.goldencode.p2j.admin.client.application.home.accounts.osusers;

import com.google.gwt.user.client.ui.*;

import org.gwtbootstrap3.client.ui.Button;
import org.gwtbootstrap3.client.ui.gwt.DataGrid;

import com.goldencode.p2j.admin.TaggedName;
import com.goldencode.p2j.admin.client.NameTokens;
import com.goldencode.p2j.admin.client.application.home.BaseViewWithUiHandlers;
import com.goldencode.p2j.admin.client.widget.GridHandle;
import com.goldencode.p2j.admin.client.widget.GridHelper;
import com.goldencode.p2j.admin.shared.PaperFormat;
import com.goldencode.p2j.admin.shared.PaperOrientation;
import com.goldencode.p2j.admin.shared.ReportParameters;
import com.goldencode.p2j.admin.shared.Reports;
import com.google.gwt.core.client.Scheduler;
import com.google.gwt.core.client.Scheduler.ScheduledCommand;
import com.google.gwt.dom.client.Style.Unit;
import com.google.gwt.event.dom.client.ClickEvent;
import com.google.gwt.uibinder.client.UiBinder;
import com.google.gwt.uibinder.client.UiField;
import com.google.gwt.uibinder.client.UiHandler;
import com.google.gwt.view.client.ListDataProvider;
import com.google.gwt.view.client.MultiSelectionModel;
import com.google.gwt.view.client.SelectionChangeEvent;
import com.google.inject.Inject;

import java.util.*;
import java.util.function.*;

/**
 * UsersView is a view to manage user accounts.
 */
public class OsUsersView
extends BaseViewWithUiHandlers<OsUsersUIHandlers>
implements OsUsersPresenter.MyView
{
   /**
    * GWT UI creator.
    */
   interface Binder
   extends UiBinder<Widget, OsUsersView>
   {}
   
   /** The Refresh button */
   @UiField
   Button refresh;

   /** The Add User button */
   @UiField
   Button addOsUserAccount;

   /** The Delete User button */
   @UiField
   Button deleteOsUserAccount;

   /** The Edit User button */
   @UiField
   Button editOsUserAccount;
   
   /** The Disable/Enable User button */
   @UiField
   Button disableOsUserAccount;
   
   /** The Find User button */
   @UiField
   Button findOsUser;
   
   /** The all users table view */
   @UiField(provided = true)
   DataGrid<TaggedName> usersGrid = GridHelper.create();

   /** The associated FWD users table view */
   @UiField(provided = true)
   DataGrid<TaggedName> fwdUsersGrid = GridHelper.create();
   
   /** The modal container */
   @UiField
   HasWidgets modalFragment;

   /** The parent container for the Add/Edit User Definition view */
   @UiField
   FlowPanel osUserDefModal;
   
   /** The column names for the all OS users table. */
   private final String[] usersColumnNames = { "OS User ID", "Description", "Password" };

   /** The column names for the FWD users table */
   private final String[] fwdUsersColumnNames = { "FWD User" };
   
   /** The all OS users data provider */
   private final ListDataProvider<TaggedName> usersProvider;

   /** The FWD users data provider */
   private final ListDataProvider<TaggedName> fwdUsersProvider;

   /** The FWD users grid handle */
   private final GridHandle<TaggedName> fwdUsersGridHandle;
   
   /** The all OS users selection model */
   private final MultiSelectionModel<TaggedName> usersSelectionModel;

   /** The FWD users selection model */
   private final MultiSelectionModel<TaggedName> fwdUsersSelectionModel;
   
   /** The delete OS users view */
   private final DeletingOsUsersAlert deletingUsersAlert;
   
   /**
    * Constructs this view, used by MPV gwtplatform of ArcBees Inc.
    * 
    * @param    binder
    *           UI creator
    * @param    deletingUsersAlert
    *           Deleting user alert child view
    */
   @Inject
   public OsUsersView(Binder binder, DeletingOsUsersAlert deletingUsersAlert)
   {
      initWidget(binder.createAndBindUi(this));
      
      this.deletingUsersAlert = deletingUsersAlert;

      GridHandle<TaggedName> usersGridHandle = initTable(usersGrid, usersColumnNames);
      this.usersProvider = usersGridHandle.getDataProvider();
      this.usersSelectionModel = (MultiSelectionModel<TaggedName>) usersGridHandle.getSelectionModel();
      this.usersSelectionModel.addSelectionChangeHandler(new SelectionChangeEvent.Handler()
      {
         @Override
         public void onSelectionChange(SelectionChangeEvent event)
         {
            Set<TaggedName> selected = OsUsersView.this.usersSelectionModel.getSelectedSet();
            OsUsersView.this.getUiHandlers().onUserSelected(selected);
         }
      });
      
      usersGrid.setMinimumTableWidth(300, Unit.PX);
      setupModalSlot(OsUsersPresenter.MODAL_CONTENT, modalFragment);
      addDialog(deletingUsersAlert);

      this.fwdUsersGridHandle = initFwdUsersTable(fwdUsersGrid, fwdUsersColumnNames);
      this.fwdUsersProvider = this.fwdUsersGridHandle.getDataProvider();
      this.fwdUsersSelectionModel = (MultiSelectionModel<TaggedName>)this.fwdUsersGridHandle.getSelectionModel();
   }
   
   /**
    * Setups the given table view.
    * 
    * @param    grid
    *           The given table view
    * @param    columnNames
    *           The column names
    * 
    * @return   The grid handle
    */
   private GridHandle<TaggedName> initTable(DataGrid<TaggedName> grid, String[] columnNames)
   {
      BiFunction<TaggedName, TaggedName, Integer> comparator =
         (tn1, tn2) -> tn1.getTag().compareTo(tn2.getTag());
      
      GridHelper.ColumnInfo<TaggedName> col1 = new GridHelper.ColumnInfo<>(columnNames[0],
                                                                           TaggedName::getName,
                                                                           comparator);
      GridHelper.ColumnInfo<TaggedName> col2 = new GridHelper.ColumnInfo<>(columnNames[1],
                                                                           TaggedName::getTag,
                                                                           comparator);
      GridHelper.ColumnInfo<TaggedName> col3 = new GridHelper.ColumnInfo<>(columnNames[2],
                                                                           taggedName -> taggedName.get(2),
                                                                           comparator);
      
      return GridHelper.initListGrid(grid, true, true, col1, col2, col3);
   }


   /**
    * Setups the given table view.
    *
    * @param    grid
    *           The given table view
    * @param    columnNames
    *           The column names
    *
    * @return   The grid handle
    */
   private GridHandle<TaggedName> initFwdUsersTable(DataGrid<TaggedName> grid, String[] columnNames)
   {
      BiFunction<TaggedName, TaggedName, Integer> comparator =
         (tn1, tn2) -> tn1.getName().compareTo(tn2.getName());

      GridHelper.ColumnInfo<TaggedName> col1 = new GridHelper.ColumnInfo<>(columnNames[0],
                                                                           TaggedName::getName,
                                                                           comparator);

      return GridHelper.initListGrid(grid, true, true, col1);
   }
   
   /**
    * Sets the all users table's model with users accounts data given by tagged names
    * 
    * @param    users
    *           The array of users accounts given by tagged names
    */
   @Override
   public void setUsers(TaggedName[] users)
   {
      logger.info("setOsUsers " + users);
      usersSelectionModel.clear();
      GridHelper.updateDataProvider(usersGrid, usersProvider, users);
   }

   /**
    * The Refresh button click handler.
    * 
    * @param    e
    *           Click event
    */
   @UiHandler("refresh")
   void onRefresh(ClickEvent e)
   {
      getUiHandlers().onRefresh();
   }
   
   /**
    * The Add User button click handler.
    * 
    * @param    e
    *           Click event
    */
   @UiHandler("addOsUserAccount")
   void onAddUserAccount(ClickEvent e)
   {
      logger.info("onAddOsUserAccount");
      getUiHandlers().showAddUserAccountDialog();
   }
   
   /**
    * The Edit User button click handler.
    * 
    * @param    e
    *           Click event
    */
   @UiHandler("editOsUserAccount")
   void onEditUserAccount(ClickEvent e)
   {
      logger.info("onEditOsUserAccount");
      TaggedName[] users = this.usersSelectionModel.getSelectedSet().toArray(new TaggedName[0]);
      getUiHandlers().showEditUserAccountDialog(users[0]);
   }
   
   /**
    * The Delete User button click handler.
    * 
    * @param    e
    *           Click event
    */
   @UiHandler("deleteOsUserAccount")
   void onDeleteUserAccount(ClickEvent e)
   {
      logger.info("onDeleteOsUserAccount");
      TaggedName[] users = this.usersSelectionModel.getSelectedSet().toArray(new TaggedName[0]);
      getUiHandlers().setupDeletingUsersAlert(users);
   }
   
   /**
    * The Find User button click handler.
    * 
    * @param    e
    *           Click event
    */
   @UiHandler("findOsUser")
   void onFindUserAccount(ClickEvent e)
   {
      logger.info("onFindOsUserAccount");
      
      getUiHandlers().setupFindUserAccountDialog();
   }
   
   /**
    * Gets a reference to the Deleting Users Alert.
    * 
    * @return   The Deleting Users Alert
    */
   @Override
   public DeletingOsUsersAlert getDeletingUsersAlert()
   {
      return deletingUsersAlert;
   }

   /**
    * Provides all components that must be managed by its view state machine.
    * 
    * @return   The array of components managed by its view state machine
    */
   @Override
   public HasEnabled[] get()
   {
      return new HasEnabled[] {
         refresh,
         addOsUserAccount,
         deleteOsUserAccount,
         editOsUserAccount,
         disableOsUserAccount,
         findOsUser
      };
   }
   
   /**
    * Tests if these tested users have been selected from the all users table.
    * 
    * @param    users
    *           The array of tested user accounts given by tagged names
    * 
    * @return   True if all tested users have been selected, otherwise false.
    */
   @Override
   public boolean isSelectedFromUsers(TaggedName[] users)
   {
      return usersSelectionModel.getSelectedSet().containsAll(Arrays.asList(users));
   }

   /**
    * Returns the parent container where the Add/Edit OS User Definition View will be revealed in.
    * 
    * @return   The parent container for the Add/Edit OS User Definition View.
    */
   @Override
   public HasWidgets getOsUserDefModalParent()
   {
      return osUserDefModal;
   }

   /**
    * Sets the FWD users table's model with all associated FWD users for the single selected OS user 
    * from the OS users table view.
    *
    * @param    fwdUsers
    *           The array of FWD users given by tagged names
    */
   @Override
   public void setAssociatedFwdUsers(TaggedName[] fwdUsers)
   {
      logger.info("setAssociatedFwdUsers");
      this.fwdUsersSelectionModel.clear();
      GridHelper.updateDataProvider(fwdUsersGrid, fwdUsersProvider, fwdUsers);
   }

   /**
    * Selects the user's data row from the all users table by a given user's tagged name.
    * 
    * @param    user
    *           The OS user account given by its tagged name
    */
   @Override
   public void selectUser(TaggedName user)
   {
      logger.info("selectUser " + user.getName());
      usersSelectionModel.clear();
      Scheduler.get().scheduleDeferred(() ->
                                       {
                                          usersSelectionModel.setSelected(user, true);
                                          scrollIntoView(user);
                                       });
   }
   
   /**
    * Sets the row with the given user within the current view.
    * 
    * @param    user
    *           The user account given by its tagged name
    */
   private void scrollIntoView(TaggedName user)
   {
      int index = usersProvider.getList().indexOf(user);
      if (index >= 0)
      {
         usersGrid.getRowElement(index).scrollIntoView();
      }
   }
   
   /**
    * Selects the user's data row from the all users table by a given user's account name.
    * 
    * @param    name
    *           The account name.
    */
   @Override
   public void selectUserByName(String name)
   {
      logger.info("setSelectedUser " + name);
      usersSelectionModel.clear();
      usersProvider.getList().forEach(user -> {
         if (user.getName().equals(name))
         {
            Scheduler.get().scheduleDeferred(new ScheduledCommand()
            {
               @Override
               public void execute()
               {
                  usersSelectionModel.setSelected(user, true);
                  scrollIntoView(user);
               }
            });
         }
      });
   }

   /**
    * Toggles the Disable/Enable User button's label.
    * 
    * @param    enabled
    *           Indicates the user's enabled state. The true value switches this button's label
    *           from "Enable User" to "Disable User" and vice versa the false value switches
    *           from "Disable User" to "Enable User".
    */
   @Override
   public void toggleDisableUserButton(boolean enabled)
   {
      if (enabled)
      {
         disableOsUserAccount.setText("Disable User");
      }
      else
      {
         disableOsUserAccount.setText("Enable User");
      }
   }
   
   @UiHandler("disableOsUserAccount")
   public void onDisableUserAccount(ClickEvent e)
   {
      TaggedName user = usersSelectionModel.getSelectedSet().toArray(new TaggedName[0])[0];
      getUiHandlers().disableUserAccount(user);
   }
   
   /**
    * Returns pairs of a report parameter key and its value
    * 
    * @return   The enumeration map of report parameters keys to their values
    */
   @Override
   public EnumMap<ReportParameters, Object> getReportParameters()
   {
      EnumMap<ReportParameters, Object> parameters = new EnumMap<>(ReportParameters.class);
      parameters.put(ReportParameters.SELECTION, usersSelectionModel.getSelectedSet()
                                                                    .toArray(new TaggedName[0]));
      parameters.put(ReportParameters.TITLE, "OsUsers");
      parameters.put(ReportParameters.REPORT_ID, Reports.USERS);
      parameters.put(ReportParameters.PAPER_FORMAT, PaperFormat.A4);
      parameters.put(ReportParameters.PAPER_ORIENT, PaperOrientation.PORTRAIT);
      
      return parameters;
   }

   /**
    * Returns the size of all data to preview or the size of selected data to preview
    * 
    * @param    range
    *           The target range of selected data to preview
    * @return   The size of the selected data
    */
   @Override
   public int getDataSize(Range range)
   {
      if (range == Range.SELECTION)
      {
         return usersSelectionModel.getSelectedSet().size();
      }
      
      return usersProvider.getList().size();
   }

   /**
    * Returns the value of the preview dialog parameter.
    * 
    * @param    parameter
    *           The preview dialog parameter key
    * 
    * @return   The value of the preview dialog parameter
    */
   @Override
   public String getPreviewDialogParameter(PreviewDialogParameters parameter)
   {
      int selectedRecordsNumber = usersSelectionModel.getSelectedSet().size();
      int allRecordsNumber = usersProvider.getList().size();
      switch (parameter)
      {
         case HELP_TEXT:
            String hlpText;
            if (selectedRecordsNumber > 0)
            {
               hlpText = "<h4>Please refine your request.</h4>";
            }
            else
            {
               if (allRecordsNumber > 1)
               {
                  hlpText = "<h4>" + allRecordsNumber + " user accounts being printed. Continue?</h4>";
               }
               else if (allRecordsNumber == 1)
               {
                  hlpText = "<h4>1 user account being printed. Continue?</h4>";
               }
               else
               {
                  hlpText = "<h4>There are no users to print. Continue?</h4>";
               }
            }
            
            return hlpText;
         case TITLE:
            return "Printing Users";
         case RANGE_ALL_LABEL:
            if (allRecordsNumber > 2)
            {
               return "all " + allRecordsNumber + " user accounts";
            }
            else if (allRecordsNumber == 2)
            {
               return "both user accounts";
            }
            
            break;
         case RANGE_SELECTION_LABEL:
            if (selectedRecordsNumber > 1)
            {
               return selectedRecordsNumber + " selected user accounts";
            }
            else if (selectedRecordsNumber == 1)
            {
               return "the selected user account";
            }
            
            break;
      }
      
      return null;
   }

   /**
    * Returns url path to this view.
    * 
    * @return   The url path.
    */
   @Override
   public String getPathToPrintPreviewOwner()
   {
      return NameTokens.USERS;
   }
}