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path: root/src/main/java/com/juick/www/ad/models/Site.java
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/*
 * Copyright (C) 2008-2022, Juick
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

package com.juick.www.ad.models;

import org.apache.commons.io.IOUtils;
import org.apache.commons.lang3.StringUtils;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.NodeList;
import org.xml.sax.SAXException;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import java.io.IOException;
import java.nio.charset.StandardCharsets;
import java.util.ArrayList;
import java.util.List;

public record Site(String siteUrl, String code, String delimiter, List<Page> pages) {
    public static Site fromXMLData(String data) throws ParserConfigurationException, IOException, SAXException {
        DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
        DocumentBuilder builder = factory.newDocumentBuilder();
        Document document = builder.parse(IOUtils.toInputStream(data, StandardCharsets.UTF_8));
        Element sape = document.getDocumentElement();
        String code = StringUtils.EMPTY;
        String siteUrl = sape.getAttribute("site_url");
        String delimiter = sape.getAttribute("delimiter");
        NodeList pageNodes = sape.getElementsByTagName("page");
        List<Page> pages = new ArrayList<>(pageNodes.getLength());
        for (int i = 0; i < pageNodes.getLength(); i++) {
            Element pageElement = (Element) pageNodes.item(i);
            String uri = pageElement.getAttribute("uri");
            if (uri.equals("*")) {
                code = pageElement.getTextContent();
            }
            NodeList linkNodes = pageElement.getElementsByTagName("link");
            List<String> links = new ArrayList<>(linkNodes.getLength());
            for (int j = 0; j < linkNodes.getLength(); j++) {
                links.add(linkNodes.item(j).getTextContent());
            }
            pages.add(new Page(uri, links));
        }
        return new Site(siteUrl, code, delimiter, pages);
    }
}