From 15498385b8ca276cc9e3305dd1bd3546ed297ac0 Mon Sep 17 00:00:00 2001
From: Marius Lindvall <marius@varden.info>
Date: Fri, 30 Aug 2019 17:17:18 +0200
Subject: [PATCH] Prevent app crash in #1

---
 .../app/src/main/java/info/varden/hauk/MainActivity.java   | 7 +++++++
 android/app/src/main/res/values/strings.xml                | 1 +
 2 files changed, 8 insertions(+)

diff --git a/android/app/src/main/java/info/varden/hauk/MainActivity.java b/android/app/src/main/java/info/varden/hauk/MainActivity.java
index 0087b0f..67a7e7d 100644
--- a/android/app/src/main/java/info/varden/hauk/MainActivity.java
+++ b/android/app/src/main/java/info/varden/hauk/MainActivity.java
@@ -187,6 +187,13 @@ public void run(HTTPThread.Response resp) {
                     // A successful session initiation contains "OK" on line 1, the session ID on
                     // line 2, and a publicly sharable tracking link on line 3.
                     String[] data = resp.getData();
+
+                    // Somehow the data array is empty.
+                    if (data.length < 1) {
+                        diagSvc.showDialog(R.string.err_server, R.string.err_empty, resetTask);
+                        return;
+                    }
+
                     if (data[0].equals("OK")) {
                         String session = data[1];
                         viewLink = data[2];
diff --git a/android/app/src/main/res/values/strings.xml b/android/app/src/main/res/values/strings.xml
index cc578fa..9e4c6e9 100644
--- a/android/app/src/main/res/values/strings.xml
+++ b/android/app/src/main/res/values/strings.xml
@@ -38,6 +38,7 @@
     <string name="err_malformed_url">The server URL you entered is invalid.</string>
     <string name="err_missing_perms">Location permission is required to use this app.</string>
     <string name="err_location_disabled">Location services are disabled. Please enable high-accuracy location services to share your location.</string>
+    <string name="err_empty">The server returned an empty response.</string>
 
     <string name="ok_title">Connection established</string>
     <string name="ok_message">Location sharing is active! Click the share button to copy the publicly viewable URL for your share.</string>