# CertificatesView.java

    /*
    ** Module   : CertificateView.java
    ** Abstract : CertificateView represents a view to manage certificates.
    **
    ** Copyright (c) 2017, Golden Code Development Corporation.
    **
    ** -#- -I- --Date-- ----------------Description----------------------
    ** 001 SBI 20170601 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.certificates;

    import java.util.Collection;
    import java.util.Set;

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

    import com.goldencode.p2j.admin.TaggedName;
    import com.goldencode.p2j.admin.client.application.home.BaseViewWithUiHandlers;
    import com.goldencode.p2j.admin.client.application.home.accounts.CertificatesOptions;
    import com.goldencode.p2j.admin.client.widget.EnumRadioGroup;
    import com.goldencode.p2j.admin.client.widget.GridHandle;
    import com.goldencode.p2j.admin.client.widget.GridHelper;
    import com.goldencode.p2j.admin.client.widget.dialog.InputDialog;
    import com.google.common.base.Predicate;
    import com.google.common.collect.Collections2;
    import com.google.gwt.core.client.Scheduler;
    import com.google.gwt.core.client.Scheduler.ScheduledCommand;
    import com.google.gwt.event.dom.client.ClickEvent;
    import com.google.gwt.event.logical.shared.ValueChangeEvent;
    import com.google.gwt.event.logical.shared.ValueChangeHandler;
    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.MultiSelectionModel;
    import com.google.gwt.view.client.SelectionChangeEvent;
    import com.google.gwt.user.client.ui.HasEnabled;
    import com.google.gwt.user.client.ui.HasWidgets;
    import com.google.gwt.user.client.ui.Widget;
    import com.google.inject.Inject;
    import com.google.inject.Provider;

    /**
     * CertificateView represents a view to manage certificates.
     */
    public class CertificatesView
    extends BaseViewWithUiHandlers<CertificatesUIHandlers>
    implements CertificatesPresenter.MyView
    {
       /**
        * GWT UI creator
        */
       interface Binder
       extends UiBinder<Widget, CertificatesView>
       {}

       /** The certificate role selector widget */
       @UiField
       EnumRadioGroup<CertificatesOptions> certsSelector;

       /** The certificates table view */
       @UiField(provided = true)
       DataGrid<TaggedName> certsGrid = GridHelper.<TaggedName>create();

       /** The certificates grid handle */
       private final GridHandle<TaggedName> certsGridHandle;

       /** The certificates selection model */
       private final MultiSelectionModel<TaggedName> certsSelectionModel;

       /** The accounts table view */
       @UiField(provided = true)
       DataGrid<TaggedName> accountsGrid = GridHelper.<TaggedName>create();

       /** The accounts grid handle */
       private final GridHandle<TaggedName> accountsGridHandle;

       /** The accounts header widget */
       @UiField
       Heading accountsHeader;

       /** The refresh button */
       @UiField
       Button refreshCerts;

       /** Add certificate button */
       @UiField
       Button addCert;

       /** Delete certificate button*/
       @UiField
       Button deleteCerts;

       /** Change certificate alias button */
       @UiField
       Button changeAlias;

       /** View details certificate button */
       @UiField
       Button viewCert;

       /** The unused certificate checkbox */
       @UiField
       CheckBox unassignedOnly;

       /** modal container */
       @UiField
       HasWidgets modalFragment;

       /** The certificate definition view */
       private final CertificateDefinitionView certDefView;

       /** The common input dialog provider */
       private final Provider<InputDialog> inputDialogProvider;

       /** The certificate details view */
       private final CertificateDetailsView certDetailsView;

       /** The flag indicating that the select action has been invoked */
       private boolean requestToselect = false;

       /**
        * Constructs this view used by MPV gwtplatform of ArcBees Inc.
        *
        * @param    binder
        *           GWT UI Binder
        * @param    inputDialogProvider
        *           The dialog provider
        * @param    certDefView
        *           The certificate definition view
        * @param    certDetailsView
        *           The certificate details view
        */
       @Inject
       public CertificatesView(Binder binder,
                               Provider<InputDialog> inputDialogProvider,
                               CertificateDefinitionView certDefView,
                               CertificateDetailsView certDetailsView)
       {
          initWidget(binder.createAndBindUi(this));
          setupModalSlot(CertificatesPresenter.MODAL_CONTENT, modalFragment);
          this.inputDialogProvider = inputDialogProvider;
          this.certDefView = certDefView;
          addDialog(certDefView);
          this.certDetailsView = certDetailsView;
          addDialog(certDetailsView);
          this.certsGridHandle = GridHelper.<TaggedName>initListGrid(
                   certsGrid,
                   true,
                   new GridHelper.ColumnInfo<TaggedName>(
                            "Alias",
                            (tn) -> tn.getName(),
                            null),
                   new GridHelper.ColumnInfo<TaggedName>(
                            "Description",
                            (tn) -> tn.getTag(),
                            null));
          this.certsSelectionModel =
                   (MultiSelectionModel<TaggedName>) this.certsGridHandle.getSelectionModel();

          this.certsSelectionModel.addSelectionChangeHandler(new SelectionChangeEvent.Handler()
          {
             @Override
             public void onSelectionChange(SelectionChangeEvent event)
             {
                Set<TaggedName> selected = CertificatesView.this.certsSelectionModel.getSelectedSet();
                if (!selected.isEmpty() && !requestToselect)
                {
                   getUiHandlers().onCertsSelected(selected.toArray(new TaggedName[selected.size()]),
                            certsSelector.getValue(), unassignedOnly.getValue());
                }
             }
          });

          this.certsSelector.addValueChangeHandler(new ValueChangeHandler<CertificatesOptions>()
          {
             @Override
             public void onValueChange(ValueChangeEvent<CertificatesOptions> event)
             {
                logger.info("certsSelector changed " + event.getValue());
                getUiHandlers().certificatesOptionsChanged(event.getValue(),
                         unassignedOnly.getValue());
             }
          });

          this.unassignedOnly.addValueChangeHandler(new ValueChangeHandler<Boolean>()
          {
             @Override
             public void onValueChange(ValueChangeEvent<Boolean> event)
             {
                logger.info("unassignedOnly changed");
                getUiHandlers().certificatesOptionsChanged(certsSelector.getValue(), event.getValue());
             }
          });

          this.accountsGridHandle = GridHelper.<TaggedName>initListGrid(
                   accountsGrid,
                   false,
                   new GridHelper.ColumnInfo<TaggedName>(
                            "Account",
                            (tn) -> tn.getName(),
                            null),
                   new GridHelper.ColumnInfo<TaggedName>(
                            "Description",
                            (tn) -> tn.getTag(),
                            null));

       }

       /**
        * Returns the widgets that are managed by its view state machine.
        *
        * @return   The widgets that are managed by its view state machine
        */
       @Override
       public HasEnabled[] get()
       {
          return new HasEnabled[]
                   {
                      refreshCerts,
                      addCert,
                      deleteCerts,
                      changeAlias,
                      viewCert,
                      unassignedOnly
                   };
       }

       /**
        * Changes accounts table header depending on the selected certificate role.
        *
        * @param    option
        *           The selected certificate role
        */
       @Override
       public void toggleAccountsHeader(CertificatesOptions option)
       {
          if (CertificatesOptions.PEER == option)
          {
             CertificatesView.this.accountsHeader.setText("Associated Accounts");
          }
          else
          {
             CertificatesView.this.accountsHeader.setText("Certificate Hierarchy");
          }
          if (CertificatesView.this.certsSelector.getValue() != option)
          {
             CertificatesView.this.certsSelector.setValue(option, false);
          }
       }

       /**
        * Sets certificates
        *
        * @param    certs
        *           The certificates data (model)
        */
       @Override
       public void setCerts(TaggedName[] certs)
       {
          this.certsGridHandle.clearGrid();
          if (certs != null)
          {
             this.certsGridHandle.addRows(certs);
             this.certsGridHandle.getDataProvider().flush();
          }
       }

       /**
        * The refresh button click handler.
        *
        * @param    event
        *           Click event
        */
       @UiHandler("refreshCerts")
       public void onRefreshCerts(ClickEvent event)
       {
          getUiHandlers().onRefreshCertificatesList(certsSelector.getValue(),
                   unassignedOnly.getValue());
       }

       /**
        * The add button click handler.
        *
        * @param    event
        *           Click event
        */
       @UiHandler("addCert")
       public void onAddCert(ClickEvent event)
       {
          // trigger for auto opened "add certificate" dialog
          this.certDefView.setCertificateOption(certsSelector.getValue());
       }

       /**
        * The change button click handler.
        *
        * @param    event
        *           Click event
        */
       @UiHandler("changeAlias")
       public void onChangeAlias(ClickEvent event)
       {
          TaggedName selectedCert = this.certsSelectionModel.getSelectedSet().toArray(
                   new TaggedName[1])[0];
          InputDialog.Field fAlias;
          // trigger for auto opened "Change Alias" dialog
          InputDialog inputDialog = this.inputDialogProvider.get();
          inputDialog.build("Change Certificate Alias", "", new InputDialog.Field[]
          {
             fAlias = new InputDialog.Field("New Alias", selectedCert.getName(), false)
          });
          inputDialog.show(modalFragment, true, values ->
          {
             if (values != null)
             {
                String newAlias = (String) values.get(fAlias);
                TaggedName selected = certsSelectionModel.getSelectedSet().toArray(
                         new TaggedName[1])[0];
                getUiHandlers().changeAlias(selected, newAlias);
                logger.info("inputDialog -> " + newAlias);
             }
          });
       }

       /**
        * The view button click handler.
        *
        * @param    event
        *           Click event
        */
       @UiHandler("viewCert")
       public void onViewCert(ClickEvent event)
       {
          // trigger for auto opened "view certificate" dialog
          Set<TaggedName> selected = CertificatesView.this.certsSelectionModel.getSelectedSet();
          getUiHandlers().viewCertificate(selected.toArray(new TaggedName[1])[0]);

       }

       /**
        * The delete button click handler.
        *
        * @param    event
        *           Click event
        */
       @UiHandler("deleteCerts")
       public void onDeleteCerts(ClickEvent event)
       {
          // trigger "Delete certificate" dialog
          Set<TaggedName> selected = CertificatesView.this.certsSelectionModel.getSelectedSet();
          getUiHandlers().onDeleteSelectedCertificates(selected);
       }

       /**
        * Returns the certificate definition view.
        *
        * @return   The certificate definition view
        */
       @Override
       public CertificateDefinitionView getCertificateDefinitionView()
       {
          return this.certDefView;
       }

       /**
        * Sets accounts
        *
        * @param    accounts
        *           The accounts data (model)
        */
       @Override
       public void setAccounts(TaggedName[] accounts)
       {
          this.accountsGridHandle.clearGrid();
          if (accounts != null)
          {
             this.accountsGridHandle.addRows(accounts);
             this.accountsGridHandle.getDataProvider().flush();
          }
       }

       /**
        * Tests if this set of certificates is selected
        *
        * @param    selected
        *           The set of certificates
        *
        * @return   True iff theses certificates have been selected, otherwise false.
        */
       @Override
       public boolean isSelectedCertificates(Set<TaggedName> selected)
       {
          Set<TaggedName> selectedCerts = certsSelectionModel.getSelectedSet();
          return (selected != null) && selectedCerts.containsAll(selected) &&
                   selected.containsAll(selectedCerts);
       }

       /**
        * Tests if this certificate is selected
        *
        * @param    selected
        *           The target certificate
        *
        * @return   True iff this target certificate has been selected, otherwise false.
        */
       @Override
       public boolean isSelectedCertificate(TaggedName selected)
       {
          Set<TaggedName> selectedCerts = certsSelectionModel.getSelectedSet();
          return (selected != null) && selectedCerts.contains(selected) &&
                   (selectedCerts.size() == 1);
       }

       /**
        * Select the given certificate by its tagged name.
        *
        * @param    cert
        *           The certificate tagged name.
        */
       @Override
       public void selectCertificate(TaggedName cert)
       {
          requestToselect = true;
          Scheduler.get().scheduleDeferred(new ScheduledCommand()
          {
             @Override
             public void execute()
             {
                certsSelectionModel.setSelected(cert, true);
                requestToselect = false;
             }
          });
       }

       /**
        * Returns the certificate details view.
        *
        * @return   The certificate details view
        */
       @Override
       public CertificateDetailsView getCertificateDetailsView()
       {
          return this.certDetailsView;
       }

       /**
        * Select the given certificate by its alias.
        *
        * @param    alias
        *           The certificate alias
        */
       @Override
       public void selectCertificate(String alias)
       {
          Predicate<TaggedName> searchFilter = record ->
          {
             if (record.getName().equals(alias))
             {
                return true;
             }

             return false;
          };

          Collection<TaggedName> results = Collections2.filter(
                   certsGridHandle.getDataProvider().getList(), searchFilter);
          results.forEach(cert -> {
             selectCertificate(cert); logger.info("select certificate " + cert.getName()); });
       }
    }