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package de.thedevstack.conversationsplus.xmpp.disco;
import android.util.Base64;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;
import de.thedevstack.conversationsplus.ConversationsPlusApplication;
import de.thedevstack.conversationsplus.crypto.axolotl.AxolotlService;
import de.thedevstack.conversationsplus.xmpp.Xep;
import de.thedevstack.conversationsplus.xmpp.chatstate.ChatState;
import de.tzur.conversations.Settings;
/**
*/
public final class FeatureRegistry {
public static final String IDENTITY_TYPE = "phone";
private static final String[] LEGACY_FEATURES = {
"urn:xmpp:jingle:1",
"urn:xmpp:jingle:apps:file-transfer:3",
"urn:xmpp:jingle:transports:s5b:1",
"urn:xmpp:jingle:transports:ibb:1",
"http://jabber.org/protocol/muc",
"jabber:x:conference",
"http://jabber.org/protocol/caps",
"http://jabber.org/protocol/disco#info",
"urn:xmpp:avatar:metadata+notify",
"http://jabber.org/protocol/nick+notify",
ChatState.NAMESPACE,
AxolotlService.PEP_DEVICE_LIST+"+notify"};
private static final String[] LEGACY_MESSAGE_CONFIRMATION_FEATURES = {
"urn:xmpp:chat-markers:0",
"urn:xmpp:receipts"
};
private final List<String> features = new ArrayList<>();
private static final FeatureRegistry INSTANCE = new FeatureRegistry();
public static void add(String featureNamespace) {
if (null != featureNamespace) {
INSTANCE.features.add(featureNamespace);
}
}
public static void remove(String featureNamespace) {
if (null != featureNamespace && INSTANCE.features.contains(featureNamespace)) {
INSTANCE.features.remove(featureNamespace);
}
}
public static void add(Xep xep) {
add(xep.featureNamespace());
}
public static void remove(Xep xep) {
remove(xep.featureNamespace());
}
public static List<String> getFeatures() {
Collections.sort(INSTANCE.features);
return INSTANCE.features;
}
public static String getCapHash() {
StringBuilder s = new StringBuilder();
s.append("client/" + IDENTITY_TYPE + "//" + ConversationsPlusApplication.getNameAndVersion() + "<");
MessageDigest md;
try {
md = MessageDigest.getInstance("SHA-1");
} catch (NoSuchAlgorithmException e) {
return null;
}
for (String feature : getFeatures()) {
s.append(feature + "<");
}
byte[] sha1 = md.digest(s.toString().getBytes());
return new String(Base64.encode(sha1, Base64.DEFAULT));
}
private FeatureRegistry() {
this.features.addAll(Arrays.asList(LEGACY_FEATURES));
if (Settings.CONFIRM_MESSAGE_RECEIVED) {
this.features.addAll(Arrays.asList(LEGACY_MESSAGE_CONFIRMATION_FEATURES));
}
}
}
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