[evolution-ews] Ignore address books with UUID-like name

[Milan Crha <mcrha src gnome org>]

commit 03661f28db850afcfc09ba3e87daac3a84427cc0
Author: Milan Crha <mcrha redhat com>
Date:   Thu Jan 4 14:54:03 2018 +0100

    Ignore address books with UUID-like name
    
    There are advertised two address books whose name is like a UUID since
    Exchange 2013 servers, which should not be shown and cause just confusion,
    thus this change makes them ignored.

 src/collection/e-ews-backend.c |   35 ++++++++++++++++++++++++++++++++++-
 1 files changed, 34 insertions(+), 1 deletions(-)
---
diff --git a/src/collection/e-ews-backend.c b/src/collection/e-ews-backend.c
index f5f93cc..a0d61ff 100644
--- a/src/collection/e-ews-backend.c
+++ b/src/collection/e-ews-backend.c
@@ -222,6 +222,32 @@ ews_backend_sync_authentication (EEwsBackend *ews_backend,
                e_source_authentication_get_user (coll_authentication_extension));
 }
 
+static gboolean
+ews_backend_is_uuid_like_name (const gchar *name)
+{
+       const gchar *uuid_mask = "{XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX}";
+       const gchar *ptr, *msk_ptr;
+       gint len;
+
+       if (!name || *name != '{')
+               return FALSE;
+
+       len = strlen (name);
+       if (name[len - 1] != '}' || len != strlen (uuid_mask))
+               return FALSE;
+
+       for (ptr = name, msk_ptr = uuid_mask; *ptr && *msk_ptr; ptr++, msk_ptr++) {
+               if (*msk_ptr == 'X') {
+                       if (!g_ascii_isxdigit (*ptr))
+                               break;
+               } else if (*msk_ptr != *ptr) {
+                       break;
+               }
+       }
+
+       return *msk_ptr == *ptr && !*msk_ptr;
+}
+
 static ESource *
 ews_backend_new_child (EEwsBackend *backend,
                        EEwsFolder *folder)
@@ -237,10 +263,17 @@ ews_backend_new_child (EEwsBackend *backend,
 
        g_return_val_if_fail (fid != NULL, NULL);
 
+       display_name = e_ews_folder_get_name (folder);
+
+       if (e_ews_folder_get_folder_type (folder) == E_EWS_FOLDER_TYPE_CONTACTS &&
+           ews_backend_is_uuid_like_name (display_name)) {
+               /* Ignore address books with UUID-like name */
+               return NULL;
+       }
+
        collection_backend = E_COLLECTION_BACKEND (backend);
        source = e_collection_backend_new_child (collection_backend, fid->id);
 
-       display_name = e_ews_folder_get_name (folder);
        e_source_set_display_name (source, display_name);
 
        switch (e_ews_folder_get_folder_type (folder)) {