codes.thischwa.c5c.impl.FilemanagerMessageResolver.java Source code

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Here is the source code for codes.thischwa.c5c.impl.FilemanagerMessageResolver.java

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/*
 * C5Connector.Java - The Java backend for the filemanager of corefive.
 * It's a bridge between the filemanager and a storage backend and 
 * works like a transparent VFS or proxy.
 * Copyright (C) Thilo Schwarz
 * 
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 */
package codes.thischwa.c5c.impl;

import java.io.File;
import java.io.FilenameFilter;
import java.util.HashMap;
import java.util.Locale;
import java.util.Map;

import javax.servlet.ServletContext;

import org.apache.commons.io.FilenameUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import codes.thischwa.c5c.MessageResolver;
import codes.thischwa.c5c.PropertiesLoader;
import codes.thischwa.c5c.exception.FilemanagerException;
import codes.thischwa.c5c.util.PathBuilder;

import com.fasterxml.jackson.databind.ObjectMapper;

/**
 * The default implementation of the {@link MessageResolver} interface. It holds the messages 
 * provided by several javascript files located in the path 'scripts/languages' inside
 * the folder of filemanager.
 */
public class FilemanagerMessageResolver implements MessageResolver {
    private static Logger logger = LoggerFactory.getLogger(FilemanagerMessageResolver.class);

    protected static String langPath = "scripts/languages";

    protected FilenameFilter jsFilter = new FilenameFilter() {
        @Override
        public boolean accept(File dir, String name) {
            return name.endsWith(".js");
        }
    };

    private Map<String, Map<String, String>> messageStore = new HashMap<>();

    @Override
    public void setServletContext(ServletContext servletContext) throws RuntimeException {
        PathBuilder path = new PathBuilder(PropertiesLoader.getFilemanagerPath()).addFolder(langPath);
        File msgFolder = new File(servletContext.getRealPath(path.toString()));
        if (!msgFolder.exists())
            throw new RuntimeException("C5 scripts folder couldn't be found!");

        ObjectMapper mapper = new ObjectMapper();
        try {
            for (File file : msgFolder.listFiles(jsFilter)) {
                String lang = FilenameUtils.getBaseName(file.getName());
                @SuppressWarnings("unchecked")
                Map<String, String> langData = mapper.readValue(file, Map.class);
                collectLangData(lang, langData);
            }
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }

    protected void collectLangData(final String lang, final Map<String, String> data) {
        messageStore.put(lang, data);
    }

    @Override
    public String getMessage(Locale locale, FilemanagerException.Key key) throws IllegalArgumentException {
        String lang = locale.getLanguage().toLowerCase();
        if (!messageStore.containsKey(lang)) {
            logger.warn("Language [{}] not supported, take the default.", lang);
            lang = PropertiesLoader.getDefaultLocale().getLanguage().toLowerCase();
        }
        Map<String, String> messages = messageStore.get(lang);
        if (!messages.containsKey(key.getPropertyName()))
            throw new IllegalArgumentException("Message key not found: " + key.getPropertyName());
        return messages.get(key.getPropertyName());
    }
}