Provide a menu with options to save VPN profiles

The ID of the updated/inserted profile is sent back to the activity that
started the detail view.

src/frontends/android/res/menu/profile_edit.xml

@@ -0,0 +1,28 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+    Copyright (C) 2012 Tobias Brunner
+    Hochschule fuer Technik Rapperswil
+
+    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 2 of the License, or (at your
+    option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
+
+    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.
+-->
+<menu xmlns:android="http://schemas.android.com/apk/res/android" >
+
+    <item
+        android:id="@+id/menu_accept"
+        android:title="@string/profile_edit_save"
+        android:showAsAction="always|withText" />
+
+    <item
+        android:id="@+id/menu_cancel"
+        android:title="@string/profile_edit_cancel"
+        android:showAsAction="ifRoom" />
+
+</menu>

src/frontends/android/res/values/strings.xml

@@ -25,11 +25,16 @@
     <string name="add_profile">Add VPN profile</string>
 
     <!-- VPN profile details -->
+    <string name="profile_edit_save">Save</string>
+    <string name="profile_edit_cancel">Cancel</string>
     <string name="profile_name_label">Profile Name:</string>
     <string name="profile_name_hint">(use gateway address)</string>
     <string name="profile_gateway_label">Gateway:</string>
     <string name="profile_username_label">Username:</string>
     <string name="profile_password_label">Password:</string>
     <string name="profile_password_hint">(prompt when needed)</string>
+    <!-- Warnings/Notifications in the details view -->
+    <string name="alert_text_no_input_gateway">Please enter the gateway address here</string>
+    <string name="alert_text_no_input_username">Please enter your username here</string>
 
 </resources>

src/frontends/android/src/org/strongswan/android/ui/VpnProfileDetailActivity.java

@@ -22,8 +22,13 @@ import org.strongswan.android.data.VpnProfile;
 import org.strongswan.android.data.VpnProfileDataSource;
 
 import android.app.Activity;
+import android.content.Intent;
 import android.os.Bundle;
 import android.util.Log;
+import android.view.Menu;
+import android.view.MenuInflater;
+import android.view.MenuItem;
+import android.view.Window;
 import android.widget.EditText;
 
 public class VpnProfileDetailActivity extends Activity
@@ -78,6 +83,91 @@ public class VpnProfileDetailActivity extends Activity
 		outState.putLong(VpnProfileDataSource.KEY_ID, mId);
 	}
 
+	@Override
+	public boolean onCreateOptionsMenu(Menu menu)
+	{
+		MenuInflater inflater = getMenuInflater();
+		inflater.inflate(R.menu.profile_edit, menu);
+		return true;
+	}
+
+	@Override
+	public boolean onOptionsItemSelected(MenuItem item)
+	{
+		switch (item.getItemId())
+		{
+			case android.R.id.home:
+			case R.id.menu_cancel:
+				finish();
+				return true;
+			case R.id.menu_accept:
+				saveProfile();
+				return true;
+			default:
+				return super.onOptionsItemSelected(item);
+		}
+	}
+
+	/**
+	 * Save or update the profile depending on whether we actually have a
+	 * profile object or not (this was created in updateProfileData)
+	 */
+	private void saveProfile()
+	{
+		if (verifyInput())
+		{
+			if (mProfile != null)
+			{
+				updateProfileData();
+				mDataSource.updateVpnProfile(mProfile);
+			}
+			else
+			{
+				mProfile = new VpnProfile();
+				updateProfileData();
+				mDataSource.insertProfile(mProfile);
+			}
+			setResult(RESULT_OK, new Intent().putExtra(VpnProfileDataSource.KEY_ID, mProfile.getId()));
+			finish();
+		}
+	}
+
+	/**
+	 * Verify the user input and display error messages.
+	 * @return true if the input is valid
+	 */
+	private boolean verifyInput()
+	{
+		boolean valid = true;
+		if (mGateway.getText().toString().trim().isEmpty())
+		{
+			mGateway.setError(getString(R.string.alert_text_no_input_gateway));
+			valid = false;
+		}
+		if (mUsername.getText().toString().trim().isEmpty())
+		{
+			mUsername.setError(getString(R.string.alert_text_no_input_username));
+			valid = false;
+		}
+		return valid;
+	}
+
+	/**
+	 * Update the profile object with the data entered by the user
+	 */
+	private void updateProfileData()
+	{
+		/* the name is optional, we default to the gateway if none is given */
+		String name = mName.getText().toString().trim();
+		String gateway = mGateway.getText().toString().trim();
+		mProfile.setName(name.isEmpty() ? gateway : name);
+		mProfile.setGateway(gateway);
+		mProfile.setUsername(mUsername.getText().toString().trim());
+		String password = mPassword.getText().toString().trim();
+		password = password.isEmpty() ? null : password;
+		mProfile.setPassword(password);
+	}
+
 	/**
 	 * Load an existing profile if we got an ID
 	 */