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;
43import java.util.Objects;
44
45public class MyLinkify {
46
47 private static final Linkify.MatchFilter MATCH_FILTER =
48 (s, start, end) -> isPassAdditionalValidation(s.subSequence(start, end).toString());
49
50 private static boolean isPassAdditionalValidation(final String match) {
51 final var scheme = Iterables.getFirst(Splitter.on(':').limit(2).splitToList(match), null);
52 if (scheme == null) {
53 return false;
54 }
55 return switch (scheme) {
56 case "tel" -> Patterns.URI_TEL.matcher(match).matches();
57 case "http", "https" -> Patterns.URI_HTTP.matcher(match).matches();
58 case "geo" -> Patterns.URI_GEO.matcher(match).matches();
59 case "xmpp" -> new XmppUri(Uri.parse(match)).isValidJid();
60 case "web+ap" -> {
61 if (Patterns.URI_WEB_AP.matcher(match).matches()) {
62 final var webAp = new MiniUri(match);
63 // TODO once we have fragment support check that there aren't any
64 yield Objects.nonNull(webAp.getAuthority()) && webAp.getParameter().isEmpty();
65 } else {
66 yield false;
67 }
68 }
69 default -> true;
70 };
71 }
72
73 public static void addLinks(final Editable body) {
74 Linkify.addLinks(body, Patterns.URI_GENERIC, null, MATCH_FILTER, null);
75 FixedURLSpan.fix(body);
76 }
77
78 public static List<MiniUri> getLinks(final String body) {
79 final var builder = new ImmutableList.Builder<MiniUri>();
80 final var matcher = Patterns.URI_GENERIC.matcher(body);
81 while (matcher.find()) {
82 final var match = matcher.group();
83 if (isPassAdditionalValidation(match)) {
84 builder.add(new MiniUri(match));
85 }
86 }
87 return builder.build();
88 }
89}