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/*
 * Copyright 2009-2014 PrimeTek.
 *
 * 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.primefaces.component.messages;

import java.io.IOException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;

import javax.faces.application.FacesMessage;
import javax.faces.component.UIComponent;
import javax.faces.context.FacesContext;
import javax.faces.context.ResponseWriter;
import org.primefaces.context.RequestContext;
import org.primefaces.expression.SearchExpressionFacade;
import org.primefaces.renderkit.UINotificationRenderer;
import org.primefaces.util.IteratorChain;

public class MessagesRenderer extends UINotificationRenderer {

    @Override
    public void encodeEnd(FacesContext context, UIComponent component) throws IOException{
        Messages uiMessages = (Messages) component;
        ResponseWriter writer = context.getResponseWriter();
        String clientId = uiMessages.getClientId(context);
        Map> messagesMap = new HashMap>();
        boolean globalOnly = uiMessages.isGlobalOnly();
        String containerClass = uiMessages.isShowIcon() ? Messages.CONTAINER_CLASS: Messages.ICONLESS_CONTAINER_CLASS;
        String style = uiMessages.getStyle();
        String styleClass = uiMessages.getStyleClass();
        styleClass = (styleClass == null) ? containerClass: containerClass + " " + styleClass;

        String _for = uiMessages.getFor();
        Iterator messages;
        if(_for != null) {
            // key case
            messages = context.getMessages(_for);

            // clientId / SearchExpression case
            UIComponent forComponent = SearchExpressionFacade.resolveComponent(
            		context, uiMessages, _for, SearchExpressionFacade.Options.IGNORE_NO_RESULT);
            if (forComponent != null) {
                Iterator temp = context.getMessages(forComponent.getClientId(context));
                if (temp != null && temp.hasNext()) {
                    messages = new IteratorChain(messages, temp);
                }
            }
        }
        else {
            messages = uiMessages.isGlobalOnly() ? context.getMessages(null) : context.getMessages();
        }

        while(messages.hasNext()) {
            FacesMessage message = messages.next();
            FacesMessage.Severity severity = message.getSeverity();

            if(severity.equals(FacesMessage.SEVERITY_INFO))
                addMessage(uiMessages, message, messagesMap, "info");
            else if(severity.equals(FacesMessage.SEVERITY_WARN))
                addMessage(uiMessages, message, messagesMap, "warn");
            else if(severity.equals(FacesMessage.SEVERITY_ERROR))
                addMessage(uiMessages, message, messagesMap, "error");
            else if(severity.equals(FacesMessage.SEVERITY_FATAL))
                addMessage(uiMessages, message, messagesMap, "fatal");
        }

        writer.startElement("div", uiMessages);
        writer.writeAttribute("id", clientId, "id");
        writer.writeAttribute("class", styleClass, null);

        if(style != null) {
            writer.writeAttribute("style", style, null);
        }

        writer.writeAttribute("aria-live", "polite", null);

        if(RequestContext.getCurrentInstance().getApplicationContext().getConfig().isClientSideValidationEnabled()) {
            writer.writeAttribute("data-global", String.valueOf(globalOnly), null);
            writer.writeAttribute("data-summary", uiMessages.isShowSummary(), null);
            writer.writeAttribute("data-detail", uiMessages.isShowDetail(), null);
            writer.writeAttribute("data-severity", getClientSideSeverity(uiMessages.getSeverity()), null);
            writer.writeAttribute("data-redisplay", String.valueOf(uiMessages.isRedisplay()), null);
        }

        for(String severity : messagesMap.keySet()) {
            List severityMessages = messagesMap.get(severity);

            if(severityMessages.size() > 0) {
                encodeSeverityMessages(context, uiMessages, severity, severityMessages);
            }
        }

        writer.endElement("div");
    }

    protected void addMessage(Messages uiMessages, FacesMessage message, Map> messagesMap, String severity) {
        if(shouldRender(uiMessages, message, severity)) {
            List severityMessages = messagesMap.get(severity);

            if(severityMessages == null) {
                severityMessages = new ArrayList();
                messagesMap.put(severity, severityMessages);
            }

            severityMessages.add(message);
        }
    }

    protected void encodeSeverityMessages(FacesContext context, Messages uiMessages, String severity, List messages) throws IOException {
        ResponseWriter writer = context.getResponseWriter();
        String styleClassPrefix = Messages.SEVERITY_PREFIX_CLASS + severity;
        boolean escape = uiMessages.isEscape();

        writer.startElement("div", null);
        writer.writeAttribute("class", styleClassPrefix + " ui-corner-all", null);

        if(uiMessages.isClosable()) {
            encodeCloseIcon(context, uiMessages);
        }

        if(uiMessages.isShowIcon()) {
            writer.startElement("span", null);
            writer.writeAttribute("class", styleClassPrefix + "-icon", null);
            writer.endElement("span");
        }

        writer.startElement("ul", null);

        for(FacesMessage msg : messages) {
            writer.startElement("li", null);

            String summary = msg.getSummary() != null ? msg.getSummary() : "";
            String detail = msg.getDetail() != null ? msg.getDetail() : summary;

            if(uiMessages.isShowSummary()) {
                writer.startElement("span", null);
                writer.writeAttribute("class", styleClassPrefix + "-summary", null);

                if(escape)
                    writer.writeText(summary, null);
                else
                    writer.write(summary);

	            writer.endElement("span");
            }

            if(uiMessages.isShowDetail()) {
            	writer.startElement("span", null);
            	writer.writeAttribute("class", styleClassPrefix + "-detail", null);

                if(escape)
                    writer.writeText(detail, null);
                else
                    writer.write(detail);

            	writer.endElement("span");
            }

            writer.endElement("li");

            msg.rendered();
        }

        writer.endElement("ul");

        writer.endElement("div");
    }

    protected void encodeCloseIcon(FacesContext context, Messages uiMessages) throws IOException {
        ResponseWriter writer = context.getResponseWriter();

        writer.startElement("a", null);
        writer.writeAttribute("href", "#", null);
        writer.writeAttribute("class", Messages.CLOSE_LINK_CLASS, null);
        writer.writeAttribute("onclick", "$(this).parent().slideUp();return false;", null);

        writer.startElement("span", null);
        writer.writeAttribute("class", Messages.CLOSE_ICON_CLASS, null);
        writer.endElement("span");

        writer.endElement("a");
    }
}




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