1 files changed, 135 insertions, 0 deletions
diff --git a/app/src/main/java/se/leap/bitmaskclient/StartActivity.java b/app/src/main/java/se/leap/bitmaskclient/StartActivity.java
new file mode 100644
index 00000000..dd2be212
--- /dev/null
+++ b/app/src/main/java/se/leap/bitmaskclient/StartActivity.java
@@ -0,0 +1,135 @@
+package se.leap.bitmaskclient;
+
+import android.app.Activity;
+import android.content.Intent;
+import android.content.SharedPreferences;
+import android.content.pm.PackageManager;
+import android.os.Bundle;
+import android.support.annotation.IntDef;
+import android.support.annotation.Nullable;
+import android.util.Log;
+
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+
+import de.blinkt.openvpn.core.VpnStatus;
+import se.leap.bitmaskclient.userstatus.User;
+
+/**
+ * Activity shown at startup. Evaluates if App is started for the first time or has been upgraded
+ * and acts and calls another activity accordingly.
+ *
+ */
+public class StartActivity extends Activity {
+    public static final String TAG = Dashboard.class.getSimpleName();
+
+    @Retention(RetentionPolicy.SOURCE)
+    @IntDef({FIRST, NORMAL, UPGRADE, DOWNGRADE})
+    private @interface StartupMode {}
+    private static final int FIRST = 0;
+    private static final int NORMAL = 1;
+    private static final int UPGRADE = 2;
+    private static final int DOWNGRADE = 3;
+
+    private int versionCode;
+    private int previousVersionCode;
+
+    private SharedPreferences preferences;
+
+    @Override
+    protected void onCreate(@Nullable Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        preferences = getSharedPreferences(Constants.SHARED_PREFERENCES, MODE_PRIVATE);
+
+        Log.d(TAG, "Started");
+
+        switch (checkAppStart()) {
+            case NORMAL:
+                break;
+
+            case FIRST:
+                // TODO start ProfileCreation & replace below code
+                break;
+
+            case UPGRADE:
+                executeUpgrade();
+                // TODO show donation dialog
+                break;
+
+            case DOWNGRADE:
+                // TODO think how and why this should happen and what todo
+                break;
+        }
+
+        // initialize app necessities
+        ProviderAPICommand.initialize(this);
+        VpnStatus.initLogCache(getApplicationContext().getCacheDir());
+        User.init(getString(R.string.default_username));
+
+        // go to Dashboard
+        Intent intent = new Intent(this, Dashboard.class);
+        startActivity(intent);
+    }
+
+    /**
+     *  check if normal start, first run, up or downgrade
+     *  @return @StartupMode
+     */
+    @StartupMode
+    private int checkAppStart() {
+        try {
+            versionCode = getPackageManager().getPackageInfo(getPackageName(), 0).versionCode;
+            previousVersionCode = preferences.getInt(Constants.PREFERENCES_APP_VERSION, -1);
+
+            // versions do match -> normal start
+            if (versionCode == previousVersionCode) {
+                Log.d(TAG, "App start was: NORMAL START");
+                return NORMAL;
+            }
+
+            // no previous app version -> first start
+            if (previousVersionCode == -1 ) {
+                Log.d(TAG, "FIRST START");
+                return FIRST;
+            }
+
+            // version has increased -> upgrade
+            if (versionCode > previousVersionCode) {
+                Log.d(TAG, "UPGRADE");
+                return UPGRADE;
+            }
+            // version has decreased -> downgrade
+            if (versionCode < previousVersionCode) {
+                Log.d(TAG, "DOWNGRADE");
+                return DOWNGRADE;
+            }
+
+        } catch (PackageManager.NameNotFoundException e) {
+            Log.d(TAG, "Splash screen didn't find any " + getPackageName() + " package");
+        }
+
+        return NORMAL;
+    }
+
+    /**
+     * execute necessary upgrades for version change
+     */
+    private void executeUpgrade() {
+        if (hasNewFeature(FeatureVersionCode.MULTIPLE_PROFILES)) {
+            // TODO prepare usage of multiple profiles
+        }
+
+        // ensure all upgrades have passed before storing new information
+        preferences.edit().putInt(Constants.PREFERENCES_APP_VERSION, versionCode).apply();
+    }
+
+    /**
+     * check if an upgrade passed or moved to given milestone
+     * @param featureVersionCode Version code of the Milestone FeatureVersionCode.MILE_STONE
+     * @return true if milestone is reached - false otherwise
+     */
+    private boolean hasNewFeature(int featureVersionCode) {
+        return previousVersionCode < featureVersionCode && versionCode >= featureVersionCode;
+    }
+
+}