Implemented external poll

app/src/main/java/eu/faircode/email/ServiceExternal.java

@@ -76,7 +76,13 @@ public class ServiceExternal extends Service {
             String action = intent.getAction();
 
             if (ACTION_POLL.equals(action)) {
-                // TODO: sync all
+                final Context context = getApplicationContext();
+                executor.submit(new Runnable() {
+                    @Override
+                    public void run() {
+                        WorkerPoll.sync(context);
+                    }
+                });
                 return START_NOT_STICKY;
             }
 

app/src/main/java/eu/faircode/email/WorkerPoll.java

@@ -45,25 +45,7 @@ public class WorkerPoll extends Worker {
     public Result doWork() {
         Log.i("Running " + getName());
 
-        DB db = DB.getInstance(getApplicationContext());
-        try {
-            db.beginTransaction();
-
-            List<EntityAccount> accounts = db.account().getSynchronizingAccounts();
-            for (EntityAccount account : accounts) {
-                List<EntityFolder> folders = db.folder().getSynchronizingFolders(account.id);
-                if (folders.size() > 0)
-                    Collections.sort(folders, folders.get(0).getComparator(getApplicationContext()));
-                for (EntityFolder folder : folders)
-                    EntityOperation.sync(getApplicationContext(), folder.id, false);
-            }
-
-            db.setTransactionSuccessful();
-        } finally {
-            db.endTransaction();
-        }
-
-        ServiceSynchronize.eval(getApplicationContext(), false, "refresh/poll");
+        sync(getApplicationContext());
 
         return Result.success();
     }
@@ -94,6 +76,28 @@ public class WorkerPoll extends Worker {
         }
     }
 
+    static void sync(Context context) {
+        DB db = DB.getInstance(context);
+        try {
+            db.beginTransaction();
+
+            List<EntityAccount> accounts = db.account().getSynchronizingAccounts();
+            for (EntityAccount account : accounts) {
+                List<EntityFolder> folders = db.folder().getSynchronizingFolders(account.id);
+                if (folders.size() > 0)
+                    Collections.sort(folders, folders.get(0).getComparator(context));
+                for (EntityFolder folder : folders)
+                    EntityOperation.sync(context, folder.id, false);
+            }
+
+            db.setTransactionSuccessful();
+        } finally {
+            db.endTransaction();
+        }
+
+        ServiceSynchronize.eval(context, false, "refresh/poll");
+    }
+
     private static String getName() {
         return WorkerPoll.class.getSimpleName();
     }