1/*
 2 * Copyright (c) 2018, Daniel Gultsch All rights reserved.
 3 *
 4 * Redistribution and use in source and binary forms, with or without modification,
 5 * are permitted provided that the following conditions are met:
 6 *
 7 * 1. Redistributions of source code must retain the above copyright notice, this
 8 * list of conditions and the following disclaimer.
 9 *
10 * 2. Redistributions in binary form must reproduce the above copyright notice,
11 * this list of conditions and the following disclaimer in the documentation and/or
12 * other materials provided with the distribution.
13 *
14 * 3. Neither the name of the copyright holder nor the names of its contributors
15 * may be used to endorse or promote products derived from this software without
16 * specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
20 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
22 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
23 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
24 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
25 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
27 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 */
29
30package eu.siacs.conversations.ui.util;
31
32import android.net.Uri;
33import android.text.Editable;
34import android.text.util.Linkify;
35import com.google.common.base.Splitter;
36import com.google.common.collect.ImmutableList;
37import com.google.common.collect.Iterables;
38import de.gultsch.common.MiniUri;
39import de.gultsch.common.Patterns;
40import eu.siacs.conversations.ui.text.FixedURLSpan;
41import eu.siacs.conversations.utils.XmppUri;
42import java.util.List;
43
44public class MyLinkify {
45
46    private static final Linkify.MatchFilter MATCH_FILTER =
47            (s, start, end) -> isPassAdditionalValidation(s.subSequence(start, end).toString());
48
49    private static boolean isPassAdditionalValidation(final String match) {
50        final var scheme = Iterables.getFirst(Splitter.on(':').limit(2).splitToList(match), null);
51        if (scheme == null) {
52            return false;
53        }
54        return switch (scheme) {
55            case "tel" -> Patterns.URI_TEL.matcher(match).matches();
56            case "http", "https" -> Patterns.URI_HTTP.matcher(match).matches();
57            case "geo" -> Patterns.URI_GEO.matcher(match).matches();
58            case "xmpp" -> new XmppUri(Uri.parse(match)).isValidJid();
59            case "web+ap" -> Patterns.URI_WEB_AP.matcher(match).matches();
60            default -> true;
61        };
62    }
63
64    public static void addLinks(final Editable body) {
65        Linkify.addLinks(body, Patterns.URI_GENERIC, null, MATCH_FILTER, null);
66        FixedURLSpan.fix(body);
67    }
68
69    public static List<MiniUri> getLinks(final String body) {
70        final var builder = new ImmutableList.Builder<MiniUri>();
71        final var matcher = Patterns.URI_GENERIC.matcher(body);
72        while (matcher.find()) {
73            final var match = matcher.group();
74            if (isPassAdditionalValidation(match)) {
75                builder.add(new MiniUri(match));
76            }
77        }
78        return builder.build();
79    }
80}