Fixes issue 3231.

Change-Id: I2f9078caa4eec957d5bdda310b619916b4132293
Reviewed-on: http://gerrit.dmdirc.com/144
Reviewed-by: Gregory Holmes <greboid@dmdirc.com>
Tested-by: Gregory Holmes <greboid@dmdirc.com>

src/com/dmdirc/parser/interfaces/Parser.java

@@ -171,9 +171,21 @@ public interface Parser extends Runnable {
      * Get a URI that shows where this parser is connected to.
      *
      * @return URI that shows where this parser is connected to.
+     * @since 0.6.4
      */
     URI getURI();
 
+    /**
+     * Compare the given URI to the URI we are currently using to see if they
+     * would both result in the parser connecting to the same place, even if the
+     * URIs do not match exactly.
+     *
+     * @param uri URI to compare with the Parsers own URI.
+     * @return True if the Given URI is the "same" as the one we are using.
+     * @since 0.6.4
+     */
+    boolean compareURI(final URI uri);
+
 
     /**
      * Retrieves the name of the server that this parser is connected to.

src/com/dmdirc/parser/irc/IRCParser.java

@@ -338,6 +338,24 @@ public class IRCParser implements SecureParser, Runnable {
     @Override
     public URI getURI() { return server.getURI(); }
 
+    /** {@inheritDoc} */
+    @Override
+    public boolean compareURI(final URI uri) {
+        // Parse the given URI to set any defaults.
+        final ServerInfo si = new ServerInfo(uri);
+        final URI newURI = si.getURI();
+        // Get the old URI.
+        final URI oldURI = server.getURI();
+
+        // Check that protocol, host and port are the same.
+        // Anything else won't change the server we connect to just what we
+        // would do after connecting, so is not relevent.
+        return newURI.getScheme().equalsIgnoreCase(oldURI.getScheme()) &&
+               newURI.getHost().equalsIgnoreCase(oldURI.getHost()) &&
+               newURI.getPort() == oldURI.getPort();
+    }
+
+
     /** {@inheritDoc} */
     @Override
     public Map<Object, Object> getMap() { return myMap; }