EDIT

/**

* Copyright (C) 2017 EDIT

* European Distributed Institute of Taxonomy

* http://www.e-taxonomy.eu

*

* The contents of this file are subject to the Mozilla Public License Version 1.1

* See LICENSE.TXT at the top of this package for the full license terms.

*/

package eu.etaxonomy.cdm.vaadin.view.registration;

import java.util.Collection;

import java.util.List;

import org.apache.commons.lang3.StringUtils;

import org.springframework.context.annotation.Scope;

import org.springframework.security.core.GrantedAuthority;

import com.vaadin.server.FontAwesome;

import com.vaadin.shared.ui.label.ContentMode;

import com.vaadin.spring.annotation.SpringComponent;

import com.vaadin.ui.Alignment;

import com.vaadin.ui.Button;

import com.vaadin.ui.HorizontalLayout;

import com.vaadin.ui.Label;

import com.vaadin.ui.Panel;

import com.vaadin.ui.TextArea;

import com.vaadin.ui.VerticalLayout;

import eu.etaxonomy.cdm.ext.registration.messages.Message;

import eu.etaxonomy.cdm.vaadin.event.error.DelegatingErrorHandler;

import eu.etaxonomy.cdm.vaadin.security.AccessRestrictedView;

import eu.etaxonomy.vaadin.mvp.AbstractPopupView;

@SpringComponent

@Scope("prototype")

public class RegistrationMessagesPopup extends AbstractPopupView<RegistrationMessagesPresenter>

    implements RegistrationMessagesView, AccessRestrictedView {

    private static final long serialVersionUID = 713522519903334889L;

    Panel messagesPanel;

    TextArea newMessageField;

    Button sendMessageButton;

    private VerticalLayout mainLayout;

    private DelegatingErrorHandler errrorHandler = new DelegatingErrorHandler();

    public RegistrationMessagesPopup() {

        mainLayout = new VerticalLayout();

        // IMPORTANT: mainLayout must be set to full size otherwise the

        // popup window may have problems with automatic resizing of its

        // content.

        mainLayout.setSizeFull();

        setCompositionRoot(mainLayout);

    }

    /**

     * {@inheritDoc}

     */

    @Override

    protected void initContent() {

        messagesPanel = new Panel();

        newMessageField = new TextArea();

        newMessageField.setNullRepresentation("");

        newMessageField.addTextChangeListener(e -> {

            sendMessageButton.setEnabled(StringUtils.isNoneBlank(e.getText()));

        });

        sendMessageButton = new Button(FontAwesome.SEND);

        sendMessageButton.addClickListener(e -> postNewMessage());

        HorizontalLayout sendMessagebar = new HorizontalLayout(newMessageField, sendMessageButton);

        sendMessagebar.setComponentAlignment(sendMessageButton, Alignment.MIDDLE_RIGHT);

        sendMessagebar.setExpandRatio(newMessageField, 1f);

        mainLayout.addComponents(messagesPanel, sendMessagebar);

        mainLayout.setErrorHandler(errrorHandler);

    }

    /**

     * @return

     */

    private void postNewMessage() {

        // quick and dirty implementation, better send an event

        String text = newMessageField.getValue();

        if(StringUtils.isNotBlank(text)){

            getPresenter().postMessage(text);

            newMessageField.setValue(null);

        }

    }

    /**

     * {@inheritDoc}

     */

    @Override

    public String getWindowCaption() {

        return "Messages";

    }

    /**

     * {@inheritDoc}

     */

    @Override

    public void focusFirst() {

        // none

    }

    /**

     * {@inheritDoc}

     */

    @Override

    public boolean allowAnonymousAccess() {

        return false;

    }

    /**

     * {@inheritDoc}

     */

    @Override

    public Collection<Collection<GrantedAuthority>> allowedGrantedAuthorities() {

        return null;

    }

    /**

     * {@inheritDoc}

     */

    @Override

    public void cancel() {

        // not needed

    }

    /**

     * @param identifier

     */

    public void loadMessagesFor(Integer registrationEntityId) {

        getPresenter().loadMessagesFor(registrationEntityId);

    }

    /**

     * {@inheritDoc}

     */

    @Override

    public void showMessages(List<Message> messages) {

        VerticalLayout messagesList = new VerticalLayout();

        for(Message message : messages){

            Label item = new Label("<span class=\"date-time\">(" +  message.getId() + ")</span> <span class=\"user-name\"><span class=\"user-name\">" + message.getFrom().getUsername() + "</span>: "  + message.getText());

            item.setStyleName("message-item");

            item.setContentMode(ContentMode.HTML);

            messagesList.addComponent(item);

        }

        messagesPanel.setContent(messagesList);

    }

    // TODO move into AbstractPopupView?

    @Override

    public DelegatingErrorHandler getErrrorHandler(){

        return errrorHandler;

    }

}