[evolution] I#1942 - Calendar: Show extra Google attendee info in component preview

[Milan Crha <mcrha src gnome org>]

commit 5557253687689807fbd8dbf3858b2ded03ca2c19
Author: Milan Crha <mcrha redhat com>
Date:   Mon Jun 27 18:18:43 2022 +0200

    I#1942 - Calendar: Show extra Google attendee info in component preview
    
    Closes https://gitlab.gnome.org/GNOME/evolution/-/issues/1942

 src/calendar/gui/e-cal-component-preview.c  | 61 ++++++++++++++++++++++++++++
 src/calendar/importers/icalendar-importer.c | 62 ++++++++++++++++++++++++++---
 2 files changed, 118 insertions(+), 5 deletions(-)
---
diff --git a/src/calendar/gui/e-cal-component-preview.c b/src/calendar/gui/e-cal-component-preview.c
index 8987abbe74..af7e5bb12d 100644
--- a/src/calendar/gui/e-cal-component-preview.c
+++ b/src/calendar/gui/e-cal-component-preview.c
@@ -452,6 +452,7 @@ cal_component_preview_write_html (ECalComponentPreview *preview,
 
                for (a = attendees; a; a = a->next) {
                        ECalComponentAttendee *attnd = a->data;
+                       ECalComponentParameterBag *param_bag;
                        const gchar *email = cal_comp_util_get_attendee_email (attnd);
 
                        if (!attnd || !email || !*email)
@@ -490,6 +491,66 @@ cal_component_preview_write_html (ECalComponentPreview *preview,
                                g_free (str);
                        }
 
+                       param_bag = e_cal_component_attendee_get_parameter_bag (attnd);
+                       if (param_bag) {
+                               ICalParameter *num_guests = NULL;
+                               ICalParameter *response_comment = NULL;
+                               guint ii, count;
+
+                               count = e_cal_component_parameter_bag_get_count (param_bag);
+                               for (ii = 0; ii < count && (!num_guests || !response_comment); ii++) {
+                                       ICalParameter *param = e_cal_component_parameter_bag_get (param_bag, 
ii);
+
+                                       if (param && i_cal_parameter_isa (param) == I_CAL_X_PARAMETER) {
+                                               const gchar *xname = i_cal_parameter_get_xname (param);
+
+                                               if (!xname)
+                                                       continue;
+
+                                               if (!num_guests && g_ascii_strcasecmp (xname, "X-NUM-GUESTS") 
== 0)
+                                                       num_guests = param;
+
+                                               if (!response_comment && g_ascii_strcasecmp (xname, 
"X-RESPONSE-COMMENT") == 0)
+                                                       response_comment = param;
+                                       }
+                               }
+
+                               if (num_guests && i_cal_parameter_get_xvalue (num_guests)) {
+                                       gint n_guests;
+
+                                       n_guests = (gint) g_ascii_strtoll (i_cal_parameter_get_xvalue 
(num_guests), NULL, 10);
+
+                                       if (n_guests > 0) {
+                                               gchar *str, *escaped;
+
+                                               str = g_strdup_printf (g_dngettext (GETTEXT_PACKAGE, "with 
one guest", "with %d guests", n_guests), n_guests);
+                                               escaped = g_markup_escape_text (str, -1);
+
+                                               g_string_append_c (buffer, ' ');
+                                               g_string_append (buffer, escaped);
+
+                                               g_free (escaped);
+                                               g_free (str);
+                                       }
+                               }
+
+                               if (response_comment) {
+                                       const gchar *value = i_cal_parameter_get_xvalue (response_comment);
+
+                                       if (value && *value) {
+                                               gchar *escaped;
+
+                                               escaped = g_markup_escape_text (value, -1);
+
+                                               g_string_append (buffer, " (");
+                                               g_string_append (buffer, escaped);
+                                               g_string_append_c (buffer, ')');
+
+                                               g_free (escaped);
+                                       }
+                               }
+                       }
+
                        have = TRUE;
                }
 
diff --git a/src/calendar/importers/icalendar-importer.c b/src/calendar/importers/icalendar-importer.c
index 68b771c67f..b674e07647 100644
--- a/src/calendar/importers/icalendar-importer.c
+++ b/src/calendar/importers/icalendar-importer.c
@@ -1519,6 +1519,8 @@ preview_comp (EWebViewPreview *preview,
 
                for (link = attendees; link; link = g_slist_next (link)) {
                        ECalComponentAttendee *attnd = link->data;
+                       ECalComponentParameterBag *param_bag;
+                       GString *str;
                        const gchar *value, *cn;
 
                        if (!attnd)
@@ -1530,15 +1532,65 @@ preview_comp (EWebViewPreview *preview,
 
                        cn = e_cal_component_attendee_get_cn (attnd);
 
+                       str = g_string_new ("");
+
                        if (cn && *cn) {
-                               tmp = g_strconcat (cn, " <", strip_mailto (value), ">", NULL);
-                               /* Translators: Appointment's attendees */
-                               e_web_view_preview_add_section (preview, have ? NULL : C_("iCalImp", 
"Attendees"), tmp);
-                               g_free (tmp);
+                               g_string_append_printf (str, "%s <%s>", cn, strip_mailto (value));
                        } else {
-                               e_web_view_preview_add_section (preview, have ? NULL : C_("iCalImp", 
"Attendees"), strip_mailto (value));
+                               g_string_append (str, strip_mailto (value));
                        }
 
+                       param_bag = e_cal_component_attendee_get_parameter_bag (attnd);
+                       if (param_bag) {
+                               ICalParameter *num_guests = NULL;
+                               ICalParameter *response_comment = NULL;
+                               guint ii, count;
+
+                               count = e_cal_component_parameter_bag_get_count (param_bag);
+                               for (ii = 0; ii < count && (!num_guests || !response_comment); ii++) {
+                                       ICalParameter *param = e_cal_component_parameter_bag_get (param_bag, 
ii);
+
+                                       if (param && i_cal_parameter_isa (param) == I_CAL_X_PARAMETER) {
+                                               const gchar *xname = i_cal_parameter_get_xname (param);
+
+                                               if (!xname)
+                                                       continue;
+
+                                               if (!num_guests && g_ascii_strcasecmp (xname, "X-NUM-GUESTS") 
== 0)
+                                                       num_guests = param;
+
+                                               if (!response_comment && g_ascii_strcasecmp (xname, 
"X-RESPONSE-COMMENT") == 0)
+                                                       response_comment = param;
+                                       }
+                               }
+
+                               if (num_guests && i_cal_parameter_get_xvalue (num_guests)) {
+                                       gint n_guests;
+
+                                       n_guests = (gint) g_ascii_strtoll (i_cal_parameter_get_xvalue 
(num_guests), NULL, 10);
+
+                                       if (n_guests > 0) {
+                                               g_string_append_c (str, ' ');
+                                               g_string_append_printf (str, g_dngettext (GETTEXT_PACKAGE, 
"with one guest", "with %d guests", n_guests), n_guests);
+                                       }
+                               }
+
+                               if (response_comment) {
+                                       const gchar *value = i_cal_parameter_get_xvalue (response_comment);
+
+                                       if (value && *value) {
+                                               g_string_append (str, " (");
+                                               g_string_append (str, value);
+                                               g_string_append_c (str, ')');
+                                       }
+                               }
+                       }
+
+                       /* Translators: Appointment's attendees */
+                       e_web_view_preview_add_section (preview, have ? NULL : C_("iCalImp", "Attendees"), 
str->str);
+
+                       g_string_free (str, TRUE);
+
                        have = TRUE;
                }