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package de.thedevstack.conversationsplus.utils;
import java.net.MalformedURLException;
import java.net.URL;
import de.thedevstack.conversationsplus.entities.FileParams;
import de.thedevstack.conversationsplus.entities.Message;
import de.thedevstack.conversationsplus.entities.Transferable;
import de.thedevstack.conversationsplus.enums.FileStatus;
import de.thedevstack.conversationsplus.enums.MessageConfirmation;
import de.thedevstack.conversationsplus.xmpp.chatmarkers.ChatMarkers;
import de.thedevstack.conversationsplus.xmpp.receipts.MessageDeliveryReceipts;
import de.thedevstack.conversationsplus.xmpp.stanzas.MessagePacket;
/**
*/
public class MessageParserUtil {
public static MessageConfirmation extractMessageConfirmation(MessagePacket messagePacket) {
if (messagePacket.hasChild(ChatMarkers.MARKABLE)
&& messagePacket.hasChild(MessageDeliveryReceipts.REQUEST)) {
return MessageConfirmation.DELIVERY_RECEIPT_CHAT_MARKERS;
} else if (messagePacket.hasChild(ChatMarkers.MARKABLE)) {
return MessageConfirmation.CHAT_MARKERS;
} else if (messagePacket.hasChild(MessageDeliveryReceipts.REQUEST)) {
return MessageConfirmation.DELIVERY_RECEIPT;
} else {
return MessageConfirmation.NONE;
}
}
public static void extractFileParamsFromBody(Message message) {
if (null == message) {
return;
}
// Ensure that for every message the fileParams are set after calling this method
FileParams fileParams = message.getFileParams();
if (null == fileParams) {
fileParams = new FileParams();
message.setFileParams(fileParams);
}
String body = message.getBody();
/**
* there are a few cases where spaces result in an unwanted behavior, e.g.
* "http://example.com/image.jpg" text that will not be shown /abc.png"
* or more than one image link in one message.
*/
if (null == body || body.isEmpty() || body.contains(" ")) {
return;
}
URL url = MessageParserUtil.extractValidUrlFromBody(message);
if (null != url) {
String extension = FileUtils.getRelevantExtension(url);
if (message.isHttpUploaded()) {
fileParams.setUrl(url.toString());
if (null != extension
&& (Transferable.WELL_KNOWN_EXTENSIONS.contains(extension.toLowerCase()) || Transferable.VALID_IMAGE_EXTENSIONS.contains(extension.toLowerCase()))) {
message.setTreatAsDownloadable(Message.Decision.MUST);
} else {
MessageParserUtil.setParamsToAvoidDownload(message, fileParams);
}
extractFilename(message, url.toString());
return;
}
if (extension == null) {
MessageParserUtil.setParamsToAvoidDownload(message, fileParams);
return;
}
byte[] ivAndKey = UrlUtil.getIvAndKeyFromURL(url);
if (null != ivAndKey) {
if (MimeUtils.guessMimeTypeFromExtension(extension) != null) {
message.setTreatAsDownloadable(Message.Decision.MUST);
fileParams.setKeyAndIv(ivAndKey);
} else {
MessageParserUtil.setParamsToAvoidDownload(message, fileParams);
}
} else if (Transferable.VALID_IMAGE_EXTENSIONS.contains(extension)
|| Transferable.WELL_KNOWN_EXTENSIONS.contains(extension)) {
message.setTreatAsDownloadable(Message.Decision.SHOULD);
MessageUtil.setFileStatus(message, FileStatus.NEEDS_DOWNLOAD);
} else {
MessageParserUtil.setParamsToAvoidDownload(message, fileParams);
}
if (message.treatAsDownloadable() == Message.Decision.MUST
|| message.treatAsDownloadable() == Message.Decision.SHOULD) {
fileParams.setUrl(url.toString());
extractFilename(message, url.toString());
MessageUtil.setFileStatus(message, FileStatus.NEEDS_DOWNLOAD);
}
} else {
MessageParserUtil.setParamsToAvoidDownload(message, fileParams);
}
}
private static void setParamsToAvoidDownload(Message message, FileParams fileParams) {
message.setTreatAsDownloadable(Message.Decision.NEVER);
MessageUtil.setFileStatus(message, FileStatus.UNDEFINED);
}
private static void extractFilename(Message message, String url) {
String originalFilename = FileUtils.getFilenameFromPath(url);
final String lowerCaseFilename = originalFilename.toLowerCase();
final String lastPart = FileUtils.getLastExtension(lowerCaseFilename);
detectAndSetEncryption(lastPart, message);
String filenameExtension;
if (!lastPart.isEmpty() && Transferable.VALID_CRYPTO_EXTENSIONS.contains(lastPart)) {
filenameExtension = FileUtils.getSecondToLastExtension(lowerCaseFilename);
originalFilename = originalFilename.replace("." + lastPart, "");
} else {
filenameExtension = lastPart;
}
message.setRelativeFilePath(message.getUuid() + "." + filenameExtension);
message.getFileParams().setOriginalFilename(originalFilename);
}
private static void detectAndSetEncryption(String lastPart, Message message) {
if (!lastPart.isEmpty() && ("pgp".equals(lastPart) || "gpg".equals(lastPart))) {
message.setEncryption(Message.ENCRYPTION_PGP);
} else if (message.getEncryption() != Message.ENCRYPTION_OTR
&& message.getEncryption() != Message.ENCRYPTION_AXOLOTL) {
message.setEncryption(Message.ENCRYPTION_NONE);
} else if ((message.getEncryption() == Message.ENCRYPTION_OTR
|| message.getEncryption() == Message.ENCRYPTION_AXOLOTL)
&& message.getFileParams() != null && message.getFileParams().getKey() == null) {
// If an encryption is set for the message, but no key given -> decryption not possible
message.setEncryption(Message.ENCRYPTION_NONE);
}
}
private static URL extractValidUrlFromBody(Message message) {
if (null == message) {
return null;
}
String body = message.getBody();
/**
* there are a few cases where spaces result in an unwanted behavior, e.g.
* "http://example.com/image.jpg" text that will not be shown /abc.png"
* or more than one image link in one message.
*/
if (null == body || body.isEmpty() || body.contains(" ")) {
return null;
}
try {
URL url = new URL(body);
if (!url.getProtocol().equalsIgnoreCase("http") && !url.getProtocol().equalsIgnoreCase("https")) {
return null;
}
return url;
} catch (MalformedURLException e) {
return null;
}
}
}
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