Support multiple personal name spaces

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

@@ -2029,11 +2029,26 @@ class Core {
         // Get remote folders
         long start = new Date().getTime();
         List<Folder> ifolders = new ArrayList<>();
-        ifolders.addAll(Arrays.asList(defaultFolder.list("*")));
-
         List<String> subscription = new ArrayList<>();
+
+        Folder[] personal;
         try {
-            Folder[] isubscribed = defaultFolder.listSubscribed("*");
+            personal = istore.getPersonalNamespaces();
+            if (personal.length == 0)
+                throw new MessagingException("Empty personal namespaces");
+        } catch (MessagingException ex) {
+            Log.e(ex);
+            personal = new Folder[]{istore.getDefaultFolder()};
+        }
+
+        for (Folder namespace : personal) {
+            EntityLog.log(context, "Personal namespace=" + namespace.getFullName());
+            if (namespace.getSeparator() == separator) {
+                String pattern = namespace.getFullName() + "*";
+                ifolders.addAll(Arrays.asList(defaultFolder.list(pattern)));
+
+                try {
+                    Folder[] isubscribed = defaultFolder.listSubscribed(pattern);
                     for (Folder ifolder : isubscribed) {
                         String fullName = ifolder.getFullName();
                         if (TextUtils.isEmpty(fullName)) {
@@ -2053,13 +2068,16 @@ class Core {
                      */
                     Log.e(account.name, ex);
                 }
+            } else
+                Log.e("Personal namespace separator=" + namespace.getSeparator() + " default=" + separator);
+        }
 
         if (sync_shared_folders) {
             // https://tools.ietf.org/html/rfc2342
-            Folder[] namespaces = istore.getSharedNamespaces();
-            EntityLog.log(context, "Namespaces=" + namespaces.length);
-            for (Folder namespace : namespaces) {
-                EntityLog.log(context, "Namespace=" + namespace.getFullName());
+            Folder[] shared = istore.getSharedNamespaces();
+            EntityLog.log(context, "Shared namespaces=" + shared.length);
+            for (Folder namespace : shared) {
+                EntityLog.log(context, "Shared namespace=" + namespace.getFullName());
                 if (namespace.getSeparator() == separator) {
                     try {
                         ifolders.addAll(Arrays.asList(namespace.list("*")));
@@ -2082,7 +2100,7 @@ class Core {
                         Log.e(account.name, ex);
                     }
                 } else
-                    Log.e("Namespace separator=" + namespace.getSeparator() + " default=" + separator);
+                    Log.e("Shared namespace separator=" + namespace.getSeparator() + " default=" + separator);
             }
         }