org.primefaces.component.captcha.CaptchaRenderer Maven / Gradle / Ivy

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/*
 * Copyright 2009-2015 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.captcha;

import java.io.IOException;
import java.util.Map;
import javax.faces.FacesException;

import javax.faces.component.UIComponent;
import javax.faces.context.FacesContext;
import javax.faces.context.ResponseWriter;

import org.primefaces.renderkit.CoreRenderer;
import org.primefaces.util.WidgetBuilder;

public class CaptchaRenderer extends CoreRenderer {

    private final static String RESPONSE_FIELD = "g-recaptcha-response";

    @Override
    public void decode(FacesContext context, UIComponent component) {
        Captcha captcha = (Captcha) component;
        Map params = context.getExternalContext().getRequestParameterMap();

        String answer = params.get(RESPONSE_FIELD);

        if(answer != null)
            captcha.setSubmittedValue(answer);
        else
            captcha.setSubmittedValue("");
    }

    @Override
    public void encodeEnd(FacesContext context, UIComponent component) throws IOException {
        ResponseWriter writer = context.getResponseWriter();
        Captcha captcha = (Captcha) component;
        String publicKey = getPublicKey(context, captcha);

        if (publicKey == null) {
            throw new FacesException("Cannot find public key for catpcha, use primefaces.PUBLIC_CAPTCHA_KEY context-param to define one");
        }
                
        encodeMarkup(context, captcha, publicKey);
        encodeScript(context, captcha, publicKey);
    }
    
    protected void encodeMarkup(FacesContext context, Captcha captcha, String publicKey) throws IOException {
        ResponseWriter writer = context.getResponseWriter();
        String clientId = captcha.getClientId(context);

        captcha.setRequired(true);

        writer.startElement("div", null);
        writer.writeAttribute("id", clientId, "id");
        writer.endElement("div");
    }

    protected void encodeScript(FacesContext context, Captcha captcha, String publicKey) throws IOException {
        String clientId = captcha.getClientId(context);
        WidgetBuilder wb = getWidgetBuilder(context);
        wb.initWithDomReady("Captcha", captcha.resolveWidgetVar(), clientId);
        
        wb.attr("sitekey", publicKey)
            .attr("theme", captcha.getTheme(), "light")
            .attr("language", captcha.getLanguage(), "en")
            .attr("tabindex", captcha.getTabindex(), 0);
        
        wb.finish();
    }

    protected String getPublicKey(FacesContext context, Captcha captcha) {
        return context.getExternalContext().getInitParameter(Captcha.PUBLIC_KEY);
    }
}