From 46a03a3ea3c26a65e4428bc9de036a01487aeda3 Mon Sep 17 00:00:00 2001
From: Peter Palfrader <peter@palfrader.org>
Date: Fri, 17 Oct 2003 17:34:54 +0000
Subject: First go at refactoring for PathSpecs

---
 src/org/noreply/fancydress/type3/PathSpec.java | 95 ++++++++++++++++++++++++++
 1 file changed, 95 insertions(+)
 create mode 100644 src/org/noreply/fancydress/type3/PathSpec.java

(limited to 'src/org/noreply/fancydress/type3/PathSpec.java')

diff --git a/src/org/noreply/fancydress/type3/PathSpec.java b/src/org/noreply/fancydress/type3/PathSpec.java
new file mode 100644
index 0000000..cbc608f
--- /dev/null
+++ b/src/org/noreply/fancydress/type3/PathSpec.java
@@ -0,0 +1,95 @@
+/* $Id$ */
+package org.noreply.fancydress.type3;
+
+import org.noreply.fancydress.crypto.*;
+import org.noreply.fancydress.status.*;
+import org.noreply.fancydress.directory.*;
+import org.noreply.fancydress.misc.Util;
+import org.noreply.fancydress.type3.routing.*;
+import java.net.InetAddress;
+import java.util.*;
+
+
+public class PathSpec {
+	String pathSpec;
+	Path singlePath;
+
+	private String[] tokenize(String path) throws Mix3Exception {
+		ArrayList nicks = new ArrayList();
+		int indexFrom = 0;
+		int indexOf;
+
+		while ((indexOf = path.indexOf(',', indexFrom)) != -1) {
+			String v = path.substring(indexFrom, indexOf).trim();
+			if (v.equals(""))
+				throw new Mix3Exception("Invalid path.");
+			nicks.add( v );
+			indexFrom = indexOf + 1;
+		}
+		String v = path.substring(indexFrom).trim();
+		if (v.equals(""))
+			throw new Mix3Exception("Invalid path.");
+		nicks.add( v );
+
+		String[] result = new String[nicks.size()];
+		for (int i=0; i<result.length; i++)
+			result[i] = (String) nicks.get(i);
+
+		return result;
+	}
+
+	private Hop[] parseHalfPath(Directory dir, String path) throws Mix3Exception {
+		String[] nicks = tokenize(path);
+		Hop[] hops = new Hop[nicks.length];
+
+		for (int i=0; i<hops.length; i++) {
+			Server server = dir.getServer(nicks[i]);
+			if (server == null)
+				throw new Mix3Exception("Invalid path: "+nicks[i]+" not found");
+			ServerDescriptor desc = server.getDescriptor();
+			IncomingMMTPSection incoming = desc.getIncomingMMTPSection();
+			Routing routing;
+
+			if (incoming.getHostname() != null) { /* FIXME */
+				routing = new RoutingHOST(incoming.getHostname(), incoming.getPort(), server.getKeyID());
+			} else {
+				routing = new RoutingIP4(incoming.getIP(), incoming.getPort(), server.getKeyID());
+			}
+			hops[i] = new Hop(routing, desc.getPacketKey());
+		}
+		return hops;
+	}
+
+
+	/**
+	 * Create a path specification from a string.
+	 *
+	 * A path spec could look like "<code>Foo,Bar,?:Baz,*2,~1</code>".
+	 *
+	 * FIXME: right now we don't do any random foo.
+	 *
+	 * @param path given path
+	 */
+	public PathSpec(Directory dir, String pathSpec, boolean singleLeg) throws Mix3Exception {
+		this.pathSpec = pathSpec;
+
+		int crossover = pathSpec.indexOf(':');
+		if (crossover < 0)
+			throw new Mix3Exception("Path is not a valid path: no crossover point specified.");
+
+		Hop[] leg1 = parseHalfPath(dir, pathSpec.substring(0, crossover));
+		Hop[] leg2 = parseHalfPath(dir, pathSpec.substring(crossover+1));
+		singlePath = new Path(leg1, leg2);
+	}
+
+	/**
+	 * Return a path constructed from this PathSpec
+	 *
+	 * @param dir a directory
+	 * @return path
+	 */
+	public Path getPath() throws Mix3Exception {
+		return singlePath;
+	}
+}
+
-- 
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