Avoid the check for a null provider.

A provider can be asked if it's configured or not, so that we don't find
more provider = null issues.

I've created a DefaultedURL which links to https://example.net, so that
we can initialize an URL. I use composition instead of inheritance,
since URL class is final.

3 files changed, 65 insertions, 18 deletions

diff --git a/app/src/main/java/se/leap/bitmaskclient/Dashboard.java b/app/src/main/java/se/leap/bitmaskclient/Dashboard.java
index 921bf95b..ddd03dbc 100644
--- a/app/src/main/java/se/leap/bitmaskclient/Dashboard.java
+++ b/app/src/main/java/se/leap/bitmaskclient/Dashboard.java
@@ -68,7 +68,7 @@ public class Dashboard extends Activity implements SessionDialog.SessionDialogIn
     ProgressBar user_session_status_progress_bar;
 
     EipFragment eip_fragment;
-    private Provider provider;
+    private Provider provider = new Provider();
     private UserSessionStatus user_session_status;
     public ProviderAPIResultReceiver providerAPI_result_receiver;
     private boolean switching_provider;
@@ -89,7 +89,7 @@ public class Dashboard extends Activity implements SessionDialog.SessionDialogIn
         User.init();
 
         restoreProvider(savedInstanceState);
-        if (provider == null || provider.getName().isEmpty())
+        if (!provider.isConfigured())
             startActivityForResult(new Intent(this, ConfigurationWizard.class), CONFIGURE_LEAP);
         else {
             buildDashboard(getIntent().getBooleanExtra(ON_BOOT, false));
@@ -102,7 +102,7 @@ public class Dashboard extends Activity implements SessionDialog.SessionDialogIn
             if (savedInstanceState.containsKey(Provider.KEY))
                 provider = savedInstanceState.getParcelable(Provider.KEY);
         }
-        if (provider == null && preferences.getBoolean(Constants.PROVIDER_CONFIGURED, false))
+        if (!provider.isConfigured() && preferences.getBoolean(Constants.PROVIDER_CONFIGURED, false))
             provider = getSavedProviderFromSharedPreferences();
     }
 
@@ -116,8 +116,7 @@ public class Dashboard extends Activity implements SessionDialog.SessionDialogIn
 
     @Override
     protected void onSaveInstanceState(@NotNull Bundle outState) {
-        if (provider != null)
-            outState.putParcelable(Provider.KEY, provider);
+        outState.putParcelable(Provider.KEY, provider);
         if (user_session_status_text_view != null && user_session_status_text_view.getVisibility() == TextView.VISIBLE)
             outState.putSerializable(UserSessionStatus.TAG, user_session_status.sessionStatus());
 
@@ -125,9 +124,9 @@ public class Dashboard extends Activity implements SessionDialog.SessionDialogIn
     }
 
     private Provider getSavedProviderFromSharedPreferences() {
-        Provider provider = null;
+        Provider provider = new Provider();
         try {
-            provider = new Provider(new URL(preferences.getString(Provider.MAIN_URL, "")));
+            provider.setUrl(new URL(preferences.getString(Provider.MAIN_URL, "")));
             provider.define(new JSONObject(preferences.getString(Provider.KEY, "")));
         } catch (MalformedURLException | JSONException e) {
             e.printStackTrace();
diff --git a/app/src/main/java/se/leap/bitmaskclient/DefaultedURL.java b/app/src/main/java/se/leap/bitmaskclient/DefaultedURL.java
new file mode 100644
index 00000000..8daa7d8c
--- /dev/null
+++ b/app/src/main/java/se/leap/bitmaskclient/DefaultedURL.java
@@ -0,0 +1,37 @@
+package se.leap.bitmaskclient;
+
+import java.net.*;
+
+public class DefaultedURL {
+    private URL DEFAULT_URL;
+    private String default_url = "https://example.net";
+
+    private URL url;
+
+    public DefaultedURL() {
+        try {
+            DEFAULT_URL = new URL(default_url);
+            url = DEFAULT_URL;
+        } catch (MalformedURLException e) {
+            e.printStackTrace();
+        }
+    }
+
+    public boolean isDefault() { return url.equals(DEFAULT_URL); }
+
+    public void setUrl(URL url) {
+        this.url = url;
+    }
+
+    public String getDomain() {
+        return url.getHost();
+    }
+
+    public URL getUrl() {
+        return url;
+    }
+
+    public String toString() {
+        return url.toString();
+    }
+}
diff --git a/app/src/main/java/se/leap/bitmaskclient/Provider.java b/app/src/main/java/se/leap/bitmaskclient/Provider.java
index a030927d..a66d53e7 100644
--- a/app/src/main/java/se/leap/bitmaskclient/Provider.java
+++ b/app/src/main/java/se/leap/bitmaskclient/Provider.java
@@ -30,8 +30,8 @@ import java.util.*;
  */
 public final class Provider implements Parcelable {
 
-    private JSONObject definition; // Represents our Provider's provider.json
-    private URL main_url;
+    private JSONObject definition = new JSONObject(); // Represents our Provider's provider.json
+    private DefaultedURL main_url = new DefaultedURL();
     private String certificate_pin = "";
 
     final public static String
@@ -59,12 +59,14 @@ public final class Provider implements Parcelable {
     private static final String API_TERM_DEFAULT_LANGUAGE = "default_language";
     protected static final String[] API_EIP_TYPES = {"openvpn"};
 
+    public Provider() { }
+
     public Provider(URL main_url) {
-        this.main_url = main_url;
+        this.main_url.setUrl(main_url);
     }
 
     public Provider(URL main_url, String certificate_pin) {
-        this.main_url = main_url;
+        this.main_url.setUrl(main_url);
         this.certificate_pin = certificate_pin;
     }
 
@@ -81,7 +83,7 @@ public final class Provider implements Parcelable {
 
     private Provider(Parcel in) {
         try {
-            main_url = new URL(in.readString());
+            main_url.setUrl(new URL(in.readString()));
             String definition_string = in.readString();
             if (!definition_string.isEmpty())
                 definition = new JSONObject((definition_string));
@@ -90,6 +92,14 @@ public final class Provider implements Parcelable {
         }
     }
 
+    public boolean isConfigured() {
+        return !main_url.isDefault() && definition.length() > 0;
+    }
+
+    protected void setUrl(URL url) {
+        main_url.setUrl(url);
+    }
+
     protected void define(JSONObject provider_json) {
         definition = provider_json;
     }
@@ -99,10 +109,10 @@ public final class Provider implements Parcelable {
     }
 
     protected String getDomain() {
-        return main_url.getHost();
+        return main_url.getDomain();
     }
 
-    protected URL mainUrl() {
+    protected DefaultedURL mainUrl() {
         return main_url;
     }
 
@@ -118,7 +128,7 @@ public final class Provider implements Parcelable {
             else throw new JSONException("Provider not defined");
         } catch (JSONException e) {
             if (main_url != null) {
-                String host = main_url.getHost();
+                String host = main_url.getDomain();
                 name = host.substring(0, host.indexOf("."));
             }
         }
@@ -181,7 +191,8 @@ public final class Provider implements Parcelable {
 
     @Override
     public void writeToParcel(Parcel parcel, int i) {
-        parcel.writeString(main_url.toString());
+        if(main_url != null)
+            parcel.writeString(main_url.toString());
         if (definition != null)
             parcel.writeString(definition.toString());
     }
@@ -190,7 +201,7 @@ public final class Provider implements Parcelable {
     public boolean equals(Object o) {
         if (o instanceof Provider) {
             Provider p = (Provider) o;
-            return p.mainUrl().getHost().equals(mainUrl().getHost());
+            return p.mainUrl().getDomain().equals(mainUrl().getDomain());
         } else return false;
     }
 
@@ -206,6 +217,6 @@ public final class Provider implements Parcelable {
 
     @Override
     public int hashCode() {
-        return mainUrl().getHost().hashCode();
+        return mainUrl().getDomain().hashCode();
     }
 }