117 lines
4.6 KiB
Java
117 lines
4.6 KiB
Java
/*
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* Copyright (c) 2017, Daniel Gultsch All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation and/or
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* other materials provided with the distribution.
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*
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* 3. Neither the name of the copyright holder nor the names of its contributors
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* may be used to endorse or promote products derived from this software without
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* specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
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* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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package eu.siacs.conversations.utils;
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import com.google.common.base.Strings;
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import java.net.MalformedURLException;
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import java.net.URL;
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import java.util.regex.Pattern;
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import eu.siacs.conversations.entities.Conversational;
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import eu.siacs.conversations.entities.Message;
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import eu.siacs.conversations.http.AesGcmURLStreamHandler;
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import eu.siacs.conversations.http.P1S3UrlStreamHandler;
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public class MessageUtils {
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private static final Pattern LTR_RTL = Pattern.compile("(\\u200E[^\\u200F]*\\u200F){3,}");
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private static final String EMPTY_STRING = "";
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public static String prepareQuote(Message message) {
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final StringBuilder builder = new StringBuilder();
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final String body;
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if (message.hasMeCommand()) {
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final String nick;
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if (message.getStatus() == Message.STATUS_RECEIVED) {
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if (message.getConversation().getMode() == Conversational.MODE_MULTI) {
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nick = Strings.nullToEmpty(message.getCounterpart().getResource());
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} else {
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nick = message.getContact().getPublicDisplayName();
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}
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} else {
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nick = UIHelper.getMessageDisplayName(message);
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}
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body = nick + " " + message.getBody().substring(Message.ME_COMMAND.length());
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} else {
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body = message.getMergedBody().toString();;
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}
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for (String line : body.split("\n")) {
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if (line.length() <= 0) {
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continue;
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}
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final char c = line.charAt(0);
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if (c == '>' && UIHelper.isPositionFollowedByQuoteableCharacter(line, 0)
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|| (c == '\u00bb' && !UIHelper.isPositionFollowedByQuote(line, 0))) {
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continue;
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}
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if (builder.length() != 0) {
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builder.append('\n');
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}
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builder.append(line.trim());
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}
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return builder.toString();
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}
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public static boolean treatAsDownloadable(final String body, final boolean oob) {
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try {
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final String[] lines = body.split("\n");
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if (lines.length == 0) {
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return false;
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}
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for (String line : lines) {
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if (line.contains("\\s+")) {
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return false;
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}
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}
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final URL url = new URL(lines[0]);
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final String ref = url.getRef();
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final String protocol = url.getProtocol();
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final boolean encrypted = ref != null && AesGcmURLStreamHandler.IV_KEY.matcher(ref).matches();
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final boolean followedByDataUri = lines.length == 2 && lines[1].startsWith("data:");
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final boolean validAesGcm = AesGcmURLStreamHandler.PROTOCOL_NAME.equalsIgnoreCase(protocol) && encrypted && (lines.length == 1 || followedByDataUri);
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final boolean validProtocol = "http".equalsIgnoreCase(protocol) || "https".equalsIgnoreCase(protocol) || P1S3UrlStreamHandler.PROTOCOL_NAME.equalsIgnoreCase(protocol);
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final boolean validOob = validProtocol && (oob || encrypted) && lines.length == 1;
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return validAesGcm || validOob;
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} catch (MalformedURLException e) {
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return false;
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}
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}
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public static String filterLtrRtl(String body) {
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return LTR_RTL.matcher(body).replaceFirst(EMPTY_STRING);
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}
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public static boolean unInitiatedButKnownSize(Message message) {
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return message.getType() == Message.TYPE_TEXT && message.getTransferable() == null && message.isOOb() && message.getFileParams().size > 0 && message.getFileParams().url != null;
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}
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}
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