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package de.thedevstack.conversationsplus.xmpp.jid;
import android.util.LruCache;
import net.java.otr4j.session.SessionID;
import java.net.IDN;
import gnu.inet.encoding.Stringprep;
import gnu.inet.encoding.StringprepException;
/**
*/
public class JidUtil {
private static LruCache<String,Jid> cache = new LruCache<>(1024);
public static Jid fromSessionID(final SessionID id) throws InvalidJidException {
if (id.getUserID().isEmpty()) {
return fromString(id.getAccountID());
} else {
return fromString(id.getAccountID()+"/"+id.getUserID());
}
}
public static Jid fromString(final String jid) throws InvalidJidException {
return fromString(jid, false);
}
public static Jid fromString(final String jid, final boolean safe) throws InvalidJidException {
if (jid == null) throw new InvalidJidException(InvalidJidException.IS_NULL);
Jid fromCache = JidUtil.cache.get(jid);
if (fromCache != null) {
return fromCache;
}
// Hackish Android way to count the number of chars in a string... should work everywhere.
final int atCount = jid.length() - jid.replace("@", "").length();
final int slashCount = jid.length() - jid.replace("/", "").length();
// Throw an error if there's anything obvious wrong with the JID...
if (jid.isEmpty() || jid.length() > 3071) {
throw new InvalidJidException(InvalidJidException.INVALID_LENGTH);
}
// Go ahead and check if the localpart or resourcepart is empty.
if (jid.startsWith("@") || (jid.endsWith("@") && slashCount == 0) || jid.startsWith("/") || (jid.endsWith("/") && slashCount < 2)) {
throw new InvalidJidException(InvalidJidException.INVALID_CHARACTER);
}
String finaljid;
String localpart;
String domainpart;
String resourcepart;
final int domainpartStart;
final int atLoc = jid.indexOf("@");
final int slashLoc = jid.indexOf("/");
// If there is no "@" in the JID (eg. "example.net" or "example.net/resource")
// or there are one or more "@" signs but they're all in the resourcepart (eg. "example.net/@/rp@"):
if (atCount == 0 || (atCount > 0 && slashLoc != -1 && atLoc > slashLoc)) {
localpart = "";
finaljid = "";
domainpartStart = 0;
} else {
final String lp = jid.substring(0, atLoc);
try {
localpart = safe ? lp : Stringprep.nodeprep(lp);
} catch (final StringprepException e) {
throw new InvalidJidException(InvalidJidException.STRINGPREP_FAIL, e);
}
if (localpart.isEmpty() || localpart.length() > 1023) {
throw new InvalidJidException(InvalidJidException.INVALID_PART_LENGTH);
}
domainpartStart = atLoc + 1;
finaljid = lp + "@";
}
final String dp;
if (slashCount > 0) {
final String rp = jid.substring(slashLoc + 1, jid.length());
try {
resourcepart = safe ? rp : Stringprep.resourceprep(rp);
} catch (final StringprepException e) {
throw new InvalidJidException(InvalidJidException.STRINGPREP_FAIL, e);
}
if (resourcepart.isEmpty() || resourcepart.length() > 1023) {
throw new InvalidJidException(InvalidJidException.INVALID_PART_LENGTH);
}
try {
dp = IDN.toUnicode(Stringprep.nameprep(jid.substring(domainpartStart, slashLoc)), IDN.USE_STD3_ASCII_RULES);
} catch (final StringprepException e) {
throw new InvalidJidException(InvalidJidException.STRINGPREP_FAIL, e);
}
finaljid = finaljid + dp + "/" + rp;
} else {
resourcepart = "";
try{
dp = IDN.toUnicode(Stringprep.nameprep(jid.substring(domainpartStart, jid.length())), IDN.USE_STD3_ASCII_RULES);
} catch (final StringprepException e) {
throw new InvalidJidException(InvalidJidException.STRINGPREP_FAIL, e);
}
finaljid = finaljid + dp;
}
// Remove trailing "." before storing the domain part.
if (dp.endsWith(".")) {
try {
domainpart = IDN.toASCII(dp.substring(0, dp.length() - 1), IDN.USE_STD3_ASCII_RULES);
} catch (final IllegalArgumentException e) {
throw new InvalidJidException(e);
}
} else {
try {
domainpart = IDN.toASCII(dp, IDN.USE_STD3_ASCII_RULES);
} catch (final IllegalArgumentException e) {
throw new InvalidJidException(e);
}
}
// TODO: Find a proper domain validation library; validate individual parts, separators, etc.
if (domainpart.isEmpty() || domainpart.length() > 1023) {
throw new InvalidJidException(InvalidJidException.INVALID_PART_LENGTH);
}
Jid createdJid = new Jid(finaljid, localpart, domainpart, resourcepart);
JidUtil.cache.put(jid, createdJid);
return createdJid;
}
public static Jid fromParts(final String localpart, final String domainpart, final String resourcepart) throws InvalidJidException {
String out;
if (localpart == null || localpart.isEmpty()) {
out = domainpart;
} else {
out = localpart + "@" + domainpart;
}
if (resourcepart != null && !resourcepart.isEmpty()) {
out = out + "/" + resourcepart;
}
return JidUtil.fromString(out, false);
}
}
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