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