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/*
 * See the NOTICE file distributed with this work for additional
 * information regarding copyright ownership.
 * The Federal Office of Administration (Bundesverwaltungsamt, BVA)
 * licenses this file to you 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 de.bund.bva.isyfact.common.web.global;

import java.util.Map;

import javax.faces.context.FacesContext;

import org.springframework.webflow.core.collection.MutableAttributeMap;
import org.springframework.webflow.execution.RequestContextHolder;

import com.google.common.base.Strings;

import de.bund.bva.isyfact.common.web.GuiController;
import de.bund.bva.isyfact.common.web.konstanten.GuiParameterSchluessel;

/**
 * Der Controller zum Verwalten von globalen Einstellungen.
 *
 * @author Capgemini, Andreas Hörning.
 * @author Capgemini, Jonas Zitz
 * @version $Id: GlobalConfigurationController.java 123758 2014-10-10 10:01:14Z sdm_ahoerning $
 */
public class GlobalConfigurationController implements GuiController {

    /**
     * Initialsiert das GlobalConfigurationModel.
     * @return Das GlobalConfigurationModel.
     */
    public GlobalConfigurationModel initializeConfigurationModel() {
        GlobalConfigurationModel globalConfigurationModel = new GlobalConfigurationModel();

        // Registriere JavaScript: de-/aktiviert
        registriereJavascriptAktiviert(globalConfigurationModel);

        return globalConfigurationModel;
    }

    /**
     * Registiert die De-/Aktivierung von Javascript im {@link GlobalConfigurationModel}.
     *
     * @param globalConfigurationModel
     *            it das {@link GlobalConfigurationModel}
     */
    private void registriereJavascriptAktiviert(GlobalConfigurationModel globalConfigurationModel) {
        Map sessionMap =
            FacesContext.getCurrentInstance().getExternalContext().getSessionMap();
        Object jsEnabledObject = sessionMap.get(GuiParameterSchluessel.JAVASCRIPT_AKTIVIERT_SCHLUESSEL);
        if (jsEnabledObject instanceof Boolean) {
            Boolean jsEnabled = (Boolean) jsEnabledObject;
            globalConfigurationModel.setJsEnabled(jsEnabled);
        }
    }

    /**
     * Extrahiert ein Model vom Typ {@link GlobalConfigurationModel} aus dem FlowScope.
     * @return das {@link GlobalConfigurationModel} oder null, falls dieses nicht gefunden wurde.
     */
    public GlobalConfigurationModel getModelZuController() {

        MutableAttributeMap