utils: Move more API to gcal-date-time-utils.c

src/utils/gcal-date-time-utils.c

@@ -114,3 +114,114 @@ gcal_date_time_get_end_of_week (GDateTime *date)
   week_start = gcal_date_time_get_start_of_week (date);
   return g_date_time_add_weeks (week_start, 1);
 }
+
+/**
+ * gcal_date_time_compare_date:
+ * @dt1: (nullable): a #GDateTime
+ * @dt2: (nullable): a #GDateTime
+ *
+ * Compares the dates of @dt1 and @dt2. The times are
+ * ignored.
+ *
+ * Returns: negative, 0 or positive
+ */
+gint
+gcal_date_time_compare_date (GDateTime *dt1,
+                             GDateTime *dt2)
+{
+  if (!dt1 && !dt2)
+    return 0;
+  else if (!dt1)
+    return -1;
+  else if (!dt2)
+    return 1;
+
+  if (g_date_time_get_year (dt1) != g_date_time_get_year (dt2))
+    return (g_date_time_get_year (dt1) - g_date_time_get_year (dt2)) * 360;
+
+  if (g_date_time_get_month (dt1) != g_date_time_get_month (dt2))
+    return (g_date_time_get_month (dt1) - g_date_time_get_month (dt2)) * 30;
+
+  if (g_date_time_get_day_of_month (dt1) != g_date_time_get_day_of_month (dt2))
+    return g_date_time_get_day_of_month (dt1) - g_date_time_get_day_of_month (dt2);
+
+  return 0;
+}
+
+/**
+ * gcal_date_time_to_icaltime:
+ * @dt: a #GDateTime
+ *
+ * Converts the #GDateTime's @dt to an #icaltimetype.
+ *
+ * Returns: (transfer full): a #icaltimetype.
+ */
+icaltimetype*
+gcal_date_time_to_icaltime (GDateTime *dt)
+{
+  icaltimetype *idt;
+
+  if (!dt)
+    return NULL;
+
+  idt = g_new0 (icaltimetype, 1);
+
+  idt->year = g_date_time_get_year (dt);
+  idt->month = g_date_time_get_month (dt);
+  idt->day = g_date_time_get_day_of_month (dt);
+  idt->hour = g_date_time_get_hour (dt);
+  idt->minute = g_date_time_get_minute (dt);
+  idt->second = g_date_time_get_seconds (dt);
+  idt->is_date = (idt->hour == 0 &&
+                  idt->minute == 0 &&
+                  idt->second == 0);
+
+  return idt;
+
+}
+
+/**
+ * gcal_date_time_is_date:
+ * @dt: a #GDateTime
+ *
+ * Checks if @dt represents a date. A pure date
+ * has the values of hour, minutes and seconds set
+ * to 0.
+ *
+ * Returns: %TRUE if @dt is a date, %FALSE if it's a
+ * timed datetime.
+ */
+gboolean
+gcal_date_time_is_date (GDateTime *dt)
+{
+  return g_date_time_get_hour (dt) == 0 &&
+         g_date_time_get_minute (dt) == 0 &&
+         g_date_time_get_seconds (dt) == 0;
+}
+
+/**
+ * gcal_date_time_from_icaltime:
+ * @date: an #icaltimetype
+ *
+ * Creates a #GDateTime from @date. The timezone is preserved.
+ *
+ * Returns: (transfer full): a #GDateTime.
+ */
+GDateTime*
+gcal_date_time_from_icaltime (const icaltimetype *date)
+{
+  g_autoptr (GTimeZone) tz = NULL;
+  g_autoptr (GDateTime) dt = NULL;
+
+  tz = date->zone ? g_time_zone_new (icaltime_get_tzid (*date)) : g_time_zone_new_utc ();
+  dt = g_date_time_new (tz,
+                        date->year,
+                        date->month,
+                        date->day,
+                        date->is_date ? 0 : date->hour,
+                        date->is_date ? 0 : date->minute,
+                        date->is_date ? 0 : date->second);
+
+  return g_steal_pointer (&dt);
+}
+