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package eu.faircode.email;
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/*
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This file is part of FairEmail.
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FairEmail is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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NetGuard is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with NetGuard. If not, see <http://www.gnu.org/licenses/>.
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Copyright 2018 by Marcel Bokhorst (M66B)
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*/
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import org.jsoup.Jsoup;
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import org.jsoup.nodes.Document;
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import org.jsoup.nodes.Element;
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import org.jsoup.nodes.Node;
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import org.jsoup.nodes.TextNode;
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import org.jsoup.safety.Whitelist;
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import org.jsoup.select.NodeTraversor;
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import org.jsoup.select.NodeVisitor;
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import java.util.regex.Matcher;
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import java.util.regex.Pattern;
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public class HtmlHelper {
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private static Pattern pattern = Pattern.compile("([http|https]+://[\\w\\S(\\.|:|/)]+)");
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public static String sanitize(String html) {
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Document document = Jsoup.parse(Jsoup.clean(html, Whitelist.relaxed().addProtocols("img", "src", "cid")));
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for (Element tr : document.select("tr"))
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tr.after("<br>");
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NodeTraversor.traverse(new NodeVisitor() {
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@Override
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public void head(Node node, int depth) {
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if (node instanceof TextNode) {
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String text = ((TextNode) node).text();
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Matcher matcher = pattern.matcher(text);
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while (matcher.find()) {
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String ref = matcher.group();
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text = text.replace(ref, String.format("<a href=\"%s\">%s</a>", ref, ref));
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}
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node.before(text);
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((TextNode) node).text("");
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}
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}
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@Override
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public void tail(Node node, int depth) {
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}
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}, document.body());
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return document.body().html();
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}
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}
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