Load Team Info into Relay

There was a TODO in the relay server to load team information
so that the relay would be able to accept read and write
requests from servers.

This change adds the ability to read a file that can contain
the team id and team secrets that it will accept.

Closes: #9

run_relay.sh

@@ -14,5 +14,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+TEAMS_FILE="$(pwd)/teams"
+
 cd './bin'
-java codeu.chat.RelayMain "2008"
+java codeu.chat.RelayMain '2008' "$TEAMS_FILE"

src/codeu/chat/RelayMain.java

@@ -14,9 +14,14 @@
 
 package codeu.chat;
 
+import java.io.BufferedReader;
+import java.io.FileReader;
 import java.io.IOException;
 
 import codeu.chat.common.Hub;
+import codeu.chat.common.Secret;
+import codeu.chat.common.Uuid;
+import codeu.chat.common.Uuids;
 import codeu.chat.relay.Server;
 import codeu.chat.relay.ServerFrontEnd;
 import codeu.chat.util.Logger;
@@ -44,22 +49,26 @@ public static void main(String[] args) {
 
     try (final ConnectionSource source = ServerConnectionSource.forPort(myPort)) {
 
+      final Server relay = new Server(1024, 16);
+
+      LOG.info("Relay object created.");
+
+      LOG.info("Loading team data...");
+
+      loadTeamInfo(relay, args[1]);
+
+      LOG.info("Done loading team data.");
+
       LOG.info("Starting relay...");
 
-      startRelay(source);
+      startRelay(relay, source);
 
     } catch (IOException ex) {
       LOG.error(ex, "Failed to establish server accept port");
     }
   }
 
-  private static void startRelay(ConnectionSource source) {
-
-    final Server relay = new Server(1024, 16);
-
-    LOG.info("Relay object created.");
-
-    // TODO: Load team information
+  private static void startRelay(Server relay, ConnectionSource source) {
 
     final ServerFrontEnd frontEnd = new ServerFrontEnd(relay);
 
@@ -91,4 +100,41 @@ public void onException(Exception ex) {
 
     LOG.info("Hub exited.");
   }
+
+  private static void loadTeamInfo(Server relay, String file) {
+
+    try (final BufferedReader reader = new BufferedReader(new FileReader(file))) {
+
+      String line;
+      for (line = reader.readLine();
+           line != null;
+           line = reader.readLine()) {
+
+        line = line.trim();
+
+        if (line.startsWith("#")) {
+          // this is a comment, skip it
+        } else {
+
+          try {
+
+            final String[] tokens = line.split(":");
+
+            // There are just so many things that could go wrong when parsing
+            // this line that it is not worth trying to handle ahead of time.
+            // So instead just try to parse it and catch any exception.
+
+            final Uuid id = Uuids.fromString(tokens[0].trim());
+            final byte[] secret = Secret.parse(tokens[1].trim());
+
+            relay.addTeam(id, secret);
+          } catch (Exception ex) {
+            LOG.error(ex, "Skipping line \"%s\". Could not parse", line);
+          }
+        }
+      }
+    } catch (IOException ex) {
+      LOG.error(ex, "Failed to load team data");
+    }
+  }
 }

teams

@@ -0,0 +1,3 @@
+# sample team
+# this will match the values in the run_server.sh
+100.101:ABABAB