Support for Signal calls.

Merge in RedPhone

// FREEBIE

src/org/thoughtcrime/redphone/signaling/signals/InitiateSignal.java

@@ -0,0 +1,59 @@
+/*
+ * Copyright (C) 2011 Whisper Systems
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package org.thoughtcrime.redphone.signaling.signals;
+
+//import org.thoughtcrime.redphone.util.PhoneNumberFormatter;
+
+import org.whispersystems.textsecure.api.util.InvalidNumberException;
+import org.whispersystems.textsecure.api.util.PhoneNumberFormatter;
+
+/**
+ * A signal which initiates a call with the specified remote number.
+ *
+ * @author Moxie Marlinspike
+ *
+ */
+
+public class InitiateSignal extends Signal {
+
+  private final String remoteNumber;
+
+  public InitiateSignal(String localNumber, String password, long counter, String remoteNumber) {
+    super(localNumber, password, counter);
+    try {
+      this.remoteNumber = PhoneNumberFormatter.formatNumber(remoteNumber, localNumber);
+    } catch (InvalidNumberException e) {
+      throw new AssertionError(e);
+    }
+  }
+
+  @Override
+  protected String getMethod() {
+    return "GET";
+  }
+
+  @Override
+  protected String getLocation() {
+    return "/session/1/" + remoteNumber;
+  }
+
+  @Override
+  protected String getBody() {
+    return null;
+  }
+}