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-rw-r--r--src/main/java/de/thedevstack/conversationsplus/xmpp/jid/InvalidJidException.java49
-rw-r--r--src/main/java/de/thedevstack/conversationsplus/xmpp/jid/Jid.java219
2 files changed, 268 insertions, 0 deletions
diff --git a/src/main/java/de/thedevstack/conversationsplus/xmpp/jid/InvalidJidException.java b/src/main/java/de/thedevstack/conversationsplus/xmpp/jid/InvalidJidException.java
new file mode 100644
index 00000000..3c8dd717
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/xmpp/jid/InvalidJidException.java
@@ -0,0 +1,49 @@
+package de.thedevstack.conversationsplus.xmpp.jid;
+
+public class InvalidJidException extends Exception {
+
+ // This is probably not the "Java way", but the "Java way" means we'd have a ton of extra tiny,
+ // annoying classes floating around. I like this.
+ public final static String INVALID_LENGTH = "JID must be between 0 and 3071 characters";
+ public final static String INVALID_PART_LENGTH = "JID part must be between 0 and 1023 characters";
+ public final static String INVALID_CHARACTER = "JID contains an invalid character";
+ public final static String STRINGPREP_FAIL = "The STRINGPREP operation has failed for the given JID";
+ public final static String IS_NULL = "JID can not be NULL";
+
+ /**
+ * Constructs a new {@code Exception} that includes the current stack trace.
+ */
+ public InvalidJidException() {
+ }
+
+ /**
+ * Constructs a new {@code Exception} with the current stack trace and the
+ * specified detail message.
+ *
+ * @param detailMessage the detail message for this exception.
+ */
+ public InvalidJidException(final String detailMessage) {
+ super(detailMessage);
+ }
+
+ /**
+ * Constructs a new {@code Exception} with the current stack trace, the
+ * specified detail message and the specified cause.
+ *
+ * @param detailMessage the detail message for this exception.
+ * @param throwable the cause of this exception.
+ */
+ public InvalidJidException(final String detailMessage, final Throwable throwable) {
+ super(detailMessage, throwable);
+ }
+
+ /**
+ * Constructs a new {@code Exception} with the current stack trace and the
+ * specified cause.
+ *
+ * @param throwable the cause of this exception.
+ */
+ public InvalidJidException(final Throwable throwable) {
+ super(throwable);
+ }
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/xmpp/jid/Jid.java b/src/main/java/de/thedevstack/conversationsplus/xmpp/jid/Jid.java
new file mode 100644
index 00000000..43b0e878
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/xmpp/jid/Jid.java
@@ -0,0 +1,219 @@
+package de.thedevstack.conversationsplus.xmpp.jid;
+
+import android.util.LruCache;
+
+import net.java.otr4j.session.SessionID;
+
+import java.net.IDN;
+
+import de.thedevstack.conversationsplus.Config;
+import gnu.inet.encoding.Stringprep;
+import gnu.inet.encoding.StringprepException;
+
+/**
+ * The `Jid' class provides an immutable representation of a JID.
+ */
+public final class Jid {
+
+ private static LruCache<String,Jid> cache = new LruCache<>(1024);
+
+ private final String localpart;
+ private final String domainpart;
+ private final String resourcepart;
+
+ // It's much more efficient to store the ful JID as well as the parts instead of figuring them
+ // all out every time (since some characters are displayed but aren't used for comparisons).
+ private final String displayjid;
+
+ public String getLocalpart() {
+ return localpart;
+ }
+
+ public String getDomainpart() {
+ return IDN.toUnicode(domainpart);
+ }
+
+ public String getResourcepart() {
+ return resourcepart;
+ }
+
+ public static Jid fromSessionID(final SessionID id) throws InvalidJidException{
+ if (id.getUserID().isEmpty()) {
+ return Jid.fromString(id.getAccountID());
+ } else {
+ return Jid.fromString(id.getAccountID()+"/"+id.getUserID());
+ }
+ }
+
+ public static Jid fromString(final String jid) throws InvalidJidException {
+ return Jid.fromString(jid, false);
+ }
+
+ public static Jid fromString(final String jid, final boolean safe) throws InvalidJidException {
+ return new Jid(jid, safe);
+ }
+
+ 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 new Jid(out, false);
+ }
+
+ private Jid(final String jid, final boolean safe) throws InvalidJidException {
+ if (jid == null) throw new InvalidJidException(InvalidJidException.IS_NULL);
+
+ Jid fromCache = Jid.cache.get(jid);
+ if (fromCache != null) {
+ displayjid = fromCache.displayjid;
+ localpart = fromCache.localpart;
+ domainpart = fromCache.domainpart;
+ resourcepart = fromCache.resourcepart;
+ return;
+ }
+
+ // 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;
+
+ 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 = Config.DISABLE_STRING_PREP || 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 = Config.DISABLE_STRING_PREP || 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);
+ }
+ dp = IDN.toUnicode(jid.substring(domainpartStart, slashLoc), IDN.USE_STD3_ASCII_RULES);
+ finaljid = finaljid + dp + "/" + rp;
+ } else {
+ resourcepart = "";
+ dp = IDN.toUnicode(jid.substring(domainpartStart, jid.length()),
+ IDN.USE_STD3_ASCII_RULES);
+ 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.cache.put(jid, this);
+
+ this.displayjid = finaljid;
+ }
+
+ public Jid toBareJid() {
+ try {
+ return resourcepart.isEmpty() ? this : fromParts(localpart, domainpart, "");
+ } catch (final InvalidJidException e) {
+ // This should never happen.
+ return null;
+ }
+ }
+
+ public Jid toDomainJid() {
+ try {
+ return resourcepart.isEmpty() && localpart.isEmpty() ? this : fromString(getDomainpart());
+ } catch (final InvalidJidException e) {
+ // This should never happen.
+ return null;
+ }
+ }
+
+ @Override
+ public String toString() {
+ return displayjid;
+ }
+
+ @Override
+ public boolean equals(final Object o) {
+ if (this == o) return true;
+ if (o == null || getClass() != o.getClass()) return false;
+
+ final Jid jid = (Jid) o;
+
+ return jid.hashCode() == this.hashCode();
+ }
+
+ @Override
+ public int hashCode() {
+ int result = localpart.hashCode();
+ result = 31 * result + domainpart.hashCode();
+ result = 31 * result + resourcepart.hashCode();
+ return result;
+ }
+
+ public boolean hasLocalpart() {
+ return !localpart.isEmpty();
+ }
+
+ public boolean isBareJid() {
+ return this.resourcepart.isEmpty();
+ }
+
+ public boolean isDomainJid() {
+ return !this.hasLocalpart();
+ }
+}