new class to track devIDs (GCM and relay-assigned) separate from prefs

so easier to debug and don't get reset.

xwords4/android/XWords4/src/org/eehouse/android/xw4/DevID.java

@@ -0,0 +1,149 @@
+/* -*- compile-command: "find-and-ant.sh debug install"; -*- */
+/*
+ * Copyright 2010 - 2015 by Eric House (xwords@eehouse.org).  All rights
+ * reserved.
+ *
+ * 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.
+ *
+ * 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, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+ */
+
+package org.eehouse.android.xw4;
+
+/* The relay issues an identifier for a registered device. It's a string
+ * representation of a 32-bit hex number. When devices register, they pass
+ * what's meant to be a unique identifier of their own. GCM-aware devices (for
+ * which this was originally conceived) pass their GCM IDs (which can change,
+ * and require re-registration). Other devices generate an ID however they
+ * choose, or can pass "", meaning "I'm anonymous; just give me an ID based on
+ * nothing."
+ */
+
+import android.content.Context;
+import com.google.android.gcm.GCMRegistrar;
+
+import junit.framework.Assert;
+
+public class DevID {
+
+    private static final String DEVID_KEY = "DevID.devid_key";
+    private static final String DEVID_ACK_KEY = "key_relay_regid_ackd";
+    private static final String GCM_REGVERS_KEY = "key_gcmvers_regid";
+
+    private static String s_relayDevID;
+    private static int s_asInt;
+
+    // Called, likely on DEBUG builds only, when the relay hostname is
+    // changed. DevIDs are invalid at that point.
+    public static void hostChanged( Context context )
+    {
+        clearRelayDevID( context );
+        RelayService.reset( context );
+    }
+
+    public static int getRelayDevIDInt( Context context )
+    {
+        if ( 0 == s_asInt ) {
+            String asStr = getRelayDevID( context );
+            if ( null != asStr && 0 < asStr.length() ) {
+                s_asInt = Integer.valueOf( asStr, 16 );
+            }
+        }
+        return s_asInt;
+    }
+
+    public static String getRelayDevID( Context context, boolean insistAckd )
+    {
+        String result = getRelayDevID( context );
+        if ( insistAckd && 0 < result.length()
+             && ! DBUtils.getBoolFor( context, DEVID_ACK_KEY, false ) ) {
+            result = null;
+        }
+        return result;
+    }
+
+    public static String getRelayDevID( Context context )
+    {
+        if ( null == s_relayDevID ) {
+            String asStr = DBUtils.getStringFor( context, DEVID_KEY, "" );
+            // TRANSITIONAL: If it's not there, see if it's stored the old way
+            if ( 0 == asStr.length() ) {
+                asStr = XWPrefs.getPrefsString( context, R.string.key_relay_regid );
+            }
+
+            if ( null != asStr && 0 != asStr.length() ) {
+                s_relayDevID = asStr;
+            }
+        }
+        DbgUtils.logdf( "DevID.getRelayDevID() => %s", s_relayDevID );
+        return s_relayDevID;
+    }
+
+    public static void setRelayDevID( Context context, String devID )
+    {
+        DbgUtils.logdf( "DevID.setRelayDevID()" );
+        if ( BuildConfig.DEBUG ) {
+            String oldID = getRelayDevID( context );
+            if ( 0 < oldID.length() && ! devID.equals( oldID ) ) {
+                DbgUtils.logf( "devID changing!!!: %s => %s", oldID, devID );
+                Assert.fail();
+            }
+        }
+        DBUtils.setStringFor( context, DEVID_KEY, devID );
+        s_relayDevID = devID;
+
+        DBUtils.setBoolFor( context, DEVID_ACK_KEY, true );
+        DbgUtils.printStack();
+    }
+
+    public static void clearRelayDevID( Context context )
+    {
+        DbgUtils.logf( "DevID.clearRelayDevID()" );
+        DBUtils.setStringFor( context, DEVID_KEY, "" );
+        DbgUtils.printStack();
+    }
+
+    public static void setGCMDevID( Context context, String devID )
+    {
+        int curVers = Utils.getAppVersion( context );
+        DBUtils.setIntFor( context, GCM_REGVERS_KEY, curVers );
+        DBUtils.setBoolFor( context, DEVID_ACK_KEY, false );
+    }
+
+    public static String getGCMDevID( Context context )
+    {
+        int curVers = Utils.getAppVersion( context );
+        int storedVers = DBUtils.getIntFor( context, GCM_REGVERS_KEY, 0 );
+        // TRANSITIONAL
+        if ( 0 == storedVers ) {
+            storedVers = XWPrefs.getPrefsInt( context, 
+                                              R.string.key_gcmvers_regid, 0 );
+            if ( 0 != storedVers ) {
+                DBUtils.setIntFor( context, GCM_REGVERS_KEY, storedVers );
+            }
+        }
+
+        String result;
+        if ( 0 != storedVers && storedVers < curVers ) {
+            result = "";        // Don't trust what registrar has
+        } else {
+            result = GCMRegistrar.getRegistrationId( context );
+        }
+        return result;
+    }
+
+    public static void clearGCMDevID( Context context )
+    {
+        DBUtils.setBoolFor( context, DEVID_ACK_KEY, false );
+    }
+}