[evolution-ews] I#71 - Color/Score assigned by filter lost on message move

[Milan Crha <mcrha src gnome org>]

commit 34ff13deff0ddd2078ca69da7bb82f69e1382016
Author: Milan Crha <mcrha redhat com>
Date:   Fri Oct 4 12:37:17 2019 +0200

    I#71 - Color/Score assigned by filter lost on message move
    
    Closes https://gitlab.gnome.org/GNOME/evolution-ews/issues/71

 src/camel/camel-ews-utils.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)
---
diff --git a/src/camel/camel-ews-utils.c b/src/camel/camel-ews-utils.c
index 6ab4c73b..11873a88 100644
--- a/src/camel/camel-ews-utils.c
+++ b/src/camel/camel-ews-utils.c
@@ -892,6 +892,8 @@ static void
 ews_utils_copy_message_info (CamelMessageInfo *des_mi,
                             const CamelMessageInfo *src_mi)
 {
+       gchar *had_color;
+       gchar *had_score;
        gboolean had_cal;
 
        g_return_if_fail (CAMEL_IS_MESSAGE_INFO (des_mi));
@@ -900,7 +902,10 @@ ews_utils_copy_message_info (CamelMessageInfo *des_mi,
 
        camel_message_info_property_lock (des_mi);
 
+       /* Preserve custom information used by evolution */
        had_cal = camel_message_info_get_user_flag (des_mi, "$has_cal");
+       had_color = camel_message_info_dup_user_tag (des_mi, "color");
+       had_score = camel_message_info_dup_user_tag (des_mi, "score");
 
        camel_message_info_set_flags (des_mi, ~CAMEL_MESSAGE_FOLDER_FLAGGED, camel_message_info_get_flags 
(src_mi));
        camel_message_info_take_user_flags (des_mi, camel_message_info_dup_user_flags (src_mi));
@@ -919,6 +924,10 @@ ews_utils_copy_message_info (CamelMessageInfo *des_mi,
 
        if (had_cal)
                camel_message_info_set_user_flag (des_mi, "$has_cal", TRUE);
+       if (had_color)
+               camel_message_info_set_user_tag (des_mi, "color", had_color);
+       if (had_score)
+               camel_message_info_set_user_tag (des_mi, "score", had_score);
 
        if (CAMEL_IS_EWS_MESSAGE_INFO (des_mi) && CAMEL_IS_EWS_MESSAGE_INFO (src_mi)) {
                camel_ews_message_info_set_change_key (CAMEL_EWS_MESSAGE_INFO (des_mi),
@@ -926,6 +935,9 @@ ews_utils_copy_message_info (CamelMessageInfo *des_mi,
        }
 
        camel_message_info_property_unlock (des_mi);
+
+       g_free (had_color);
+       g_free (had_score);
 }
 
 void