[evolution-ews] Bug 795076 - [Contacts] Use Display Name as File As when File As is missing

[Milan Crha <mcrha src gnome org>]

commit 3f37be33e1e4d20c5504a0c93c6bbc2be8c70f01
Author: Milan Crha <mcrha redhat com>
Date:   Wed Apr 11 10:39:02 2018 +0200

    Bug 795076 - [Contacts] Use Display Name as File As when File As is missing

 src/addressbook/e-book-backend-ews.c |   14 +++++++++++++-
 1 files changed, 13 insertions(+), 1 deletions(-)
---
diff --git a/src/addressbook/e-book-backend-ews.c b/src/addressbook/e-book-backend-ews.c
index e0f6d6d..83f1cbf 100644
--- a/src/addressbook/e-book-backend-ews.c
+++ b/src/addressbook/e-book-backend-ews.c
@@ -1265,6 +1265,18 @@ ebews_set_givenname_changes (EBookBackendEws *bbews,
        /* Does nothing, the "GivenName" is filled by the "FullName" code */
 }
 
+static const gchar *
+ebews_get_fileas_or_display_name (EEwsItem *item)
+{
+       const gchar *value;
+
+       value = e_ews_item_get_fileas (item);
+       if (!value || !*value)
+               value = e_ews_item_get_display_name (item);
+
+       return value;
+}
+
 static const struct field_element_mapping {
        EContactField field_id;
        gint element_type;
@@ -1278,7 +1290,7 @@ static const struct field_element_mapping {
 } mappings[] = {
        /* The order should be maintained for create contacts to work */
        { E_CONTACT_NOTE, ELEMENT_TYPE_COMPLEX, "Notes", NULL, ebews_populate_notes, ebews_set_notes, 
ebews_set_notes_changes },
-       { E_CONTACT_FILE_AS, ELEMENT_TYPE_SIMPLE, "FileAs", e_ews_item_get_fileas},
+       { E_CONTACT_FILE_AS, ELEMENT_TYPE_SIMPLE, "FileAs", ebews_get_fileas_or_display_name },
        { E_CONTACT_FULL_NAME, ELEMENT_TYPE_COMPLEX, "CompleteName", NULL, ebews_populate_full_name, 
ebews_set_full_name, ebews_set_full_name_changes},
        { E_CONTACT_NICKNAME, ELEMENT_TYPE_SIMPLE, "Nickname", NULL, ebews_populate_nick_name},
        { E_CONTACT_ORG, ELEMENT_TYPE_SIMPLE, "CompanyName", e_ews_item_get_company_name},