on wifi change: cancel all pending uploads, check prior each upload

src/com/owncloud/android/files/InstantUploadBroadcastReceiver.java

@@ -177,12 +177,27 @@ public class InstantUploadBroadcastReceiver extends BroadcastReceiver {
             return;
         }
 
+        if (instantPictureUploadViaWiFiOnly(context) && !isConnectedViaWiFi(context)){
+            Account account = AccountUtils.getCurrentOwnCloudAccount(context);
+            if (account == null) {
+                Log_OC.w(TAG, "No owncloud account found for instant upload, aborting");
+                return;
+            }
+
+            Intent i = new Intent(context, FileUploader.class);
+            i.putExtra(FileUploader.KEY_ACCOUNT, account);
+            i.putExtra(FileUploader.KEY_CANCEL_ALL, true);
+            context.startService(i);
+        }
+
         if (!intent.hasExtra(ConnectivityManager.EXTRA_NO_CONNECTIVITY)
                 && isOnline(context)
                 && (!instantPictureUploadViaWiFiOnly(context) || (instantPictureUploadViaWiFiOnly(context) == isConnectedViaWiFi(context) == true))) {
             DbHandler db = new DbHandler(context);
             Cursor c = db.getAwaitingFiles();
-            if (c.moveToFirst()) {
+            if (c.moveToFirst() && isOnline(context)
+                && (!instantPictureUploadViaWiFiOnly(context) ||
+                (instantPictureUploadViaWiFiOnly(context) == isConnectedViaWiFi(context) == true))) {
                 do {
                     String account_name = c.getString(c.getColumnIndex("account"));
                     String file_path = c.getString(c.getColumnIndex("path"));

src/com/owncloud/android/files/services/FileUploader.java

@@ -100,6 +100,8 @@ public class FileUploader extends Service
     public static final String KEY_INSTANT_UPLOAD = "INSTANT_UPLOAD";
     public static final String KEY_LOCAL_BEHAVIOUR = "BEHAVIOUR";
 
+    public static final String KEY_CANCEL_ALL = "CANCEL_ALL";
+
     public static final int LOCAL_BEHAVIOUR_COPY = 0;
     public static final int LOCAL_BEHAVIOUR_MOVE = 1;
     public static final int LOCAL_BEHAVIOUR_FORGET = 2;
@@ -209,6 +211,11 @@ public class FileUploader extends Service
     public int onStartCommand(Intent intent, int flags, int startId) {
         Log_OC.d(TAG, "Starting command with id " + startId);
 
+        if (intent.hasExtra(KEY_CANCEL_ALL) && intent.hasExtra(KEY_ACCOUNT)){
+            Account account = intent.getParcelableExtra(KEY_ACCOUNT);
+            cancelUploadForAccount(account.name);
+        }
+
         if (!intent.hasExtra(KEY_ACCOUNT) || !intent.hasExtra(KEY_UPLOAD_TYPE)
                 || !(intent.hasExtra(KEY_LOCAL_FILE) || intent.hasExtra(KEY_FILE))) {
             Log_OC.e(TAG, "Not enough information provided in intent");