[gnome-calendar/gbsneto/recurring-event-editing-fixes: 13/24] event-editor/sections: Add vfunc to check for changes

[Georges Basile Stavracas Neto <gbsneto src gnome org>]

commit 82d8ec31ca0ba4ea822c59b59e6ea0f50b733b54
Author: Georges Basile Stavracas Neto <georges stavracas gmail com>
Date:   Fri Oct 14 13:59:45 2022 -0300

    event-editor/sections: Add vfunc to check for changes
    
    This will be useful for next commits where we will need to check
    if the schedule section actually changed something.

 src/gui/event-editor/gcal-event-editor-section.c | 19 ++++++
 src/gui/event-editor/gcal-event-editor-section.h |  4 ++
 src/gui/event-editor/gcal-notes-section.c        | 19 ++++++
 src/gui/event-editor/gcal-reminders-section.c    | 43 +++++++++++++
 src/gui/event-editor/gcal-schedule-section.c     | 80 ++++++++++++++++++++++++
 src/gui/event-editor/gcal-schedule-section.h     |  2 +
 src/gui/event-editor/gcal-summary-section.c      | 18 ++++++
 7 files changed, 185 insertions(+)
---
diff --git a/src/gui/event-editor/gcal-event-editor-section.c 
b/src/gui/event-editor/gcal-event-editor-section.c
index 1ac13125..3bdcba26 100644
--- a/src/gui/event-editor/gcal-event-editor-section.c
+++ b/src/gui/event-editor/gcal-event-editor-section.c
@@ -66,3 +66,22 @@ gcal_event_editor_section_apply (GcalEventEditorSection *self)
   if (GCAL_EVENT_EDITOR_SECTION_GET_IFACE (self)->apply)
     GCAL_EVENT_EDITOR_SECTION_GET_IFACE (self)->apply (self);
 }
+
+/**
+ * gcal_event_editor_section_changed:
+ * @self: a #GcalEventEditorSection
+ *
+ * Checks whether this section has any pending changes to the event.
+ *
+ * Returns: %TRUE if this section has pending changes
+ */
+gboolean
+gcal_event_editor_section_changed (GcalEventEditorSection *self)
+{
+  g_return_val_if_fail (GCAL_IS_EVENT_EDITOR_SECTION (self), FALSE);
+
+  if (GCAL_EVENT_EDITOR_SECTION_GET_IFACE (self)->changed)
+    return GCAL_EVENT_EDITOR_SECTION_GET_IFACE (self)->changed (self);
+  else
+    return TRUE;
+}
diff --git a/src/gui/event-editor/gcal-event-editor-section.h 
b/src/gui/event-editor/gcal-event-editor-section.h
index bf34aafa..85e2a386 100644
--- a/src/gui/event-editor/gcal-event-editor-section.h
+++ b/src/gui/event-editor/gcal-event-editor-section.h
@@ -45,6 +45,8 @@ struct _GcalEventEditorSectionInterface
                                                                   GcalEventEditorFlags    flags);
 
   void               (*apply)                                    (GcalEventEditorSection *self);
+
+  gboolean           (*changed)                                  (GcalEventEditorSection *self);
 };
 
 void                 gcal_event_editor_section_set_event         (GcalEventEditorSection *self,
@@ -53,4 +55,6 @@ void                 gcal_event_editor_section_set_event         (GcalEventEdito
 
 void                 gcal_event_editor_section_apply             (GcalEventEditorSection *self);
 
+gboolean             gcal_event_editor_section_changed           (GcalEventEditorSection *self);
+
 G_END_DECLS
diff --git a/src/gui/event-editor/gcal-notes-section.c b/src/gui/event-editor/gcal-notes-section.c
index eeb105ed..5256b3da 100644
--- a/src/gui/event-editor/gcal-notes-section.c
+++ b/src/gui/event-editor/gcal-notes-section.c
@@ -94,11 +94,30 @@ gcal_notes_section_apply (GcalEventEditorSection *section)
   GCAL_EXIT;
 }
 
+static gboolean
+gcal_notes_section_changed (GcalEventEditorSection *section)
+{
+  g_autofree gchar *note_text = NULL;
+  GcalNotesSection *self;
+  GtkTextBuffer *buffer;
+
+  GCAL_ENTRY;
+
+  self = GCAL_NOTES_SECTION (section);
+
+  /* Update description */
+  buffer = gtk_text_view_get_buffer (self->notes_text);
+  g_object_get (G_OBJECT (buffer), "text", &note_text, NULL);
+
+  GCAL_RETURN (g_strcmp0 (gcal_event_get_description (self->event), note_text) != 0);
+}
+
 static void
 gcal_event_editor_section_iface_init (GcalEventEditorSectionInterface *iface)
 {
   iface->set_event = gcal_notes_section_set_event;
   iface->apply = gcal_notes_section_apply;
+  iface->changed = gcal_notes_section_changed;
 }
 
 
diff --git a/src/gui/event-editor/gcal-reminders-section.c b/src/gui/event-editor/gcal-reminders-section.c
index 69b56f5e..eb7995e7 100644
--- a/src/gui/event-editor/gcal-reminders-section.c
+++ b/src/gui/event-editor/gcal-reminders-section.c
@@ -361,11 +361,54 @@ gcal_reminders_section_apply (GcalEventEditorSection *section)
   GCAL_EXIT;
 }
 
+static gboolean
+gcal_reminders_section_changed (GcalEventEditorSection *section)
+{
+  GcalRemindersSection *self;
+  g_autoptr (GList) alarms = NULL;
+
+  GCAL_ENTRY;
+
+  self = GCAL_REMINDERS_SECTION (section);
+
+  alarms = gcal_event_get_alarms (self->event);
+  if (g_list_length (alarms) != self->alarms->len)
+    GCAL_RETURN (FALSE);
+
+  for (GList *l = alarms; l != NULL; l = l->next)
+    {
+      ECalComponentAlarm *other_alarm;
+      ECalComponentAlarm *alarm;
+
+      alarm = l->data;
+      other_alarm = NULL;
+
+      for (guint i = 0; i < self->alarms->len; i++)
+        {
+          ECalComponentAlarm *aux = g_ptr_array_index (self->alarms, i);
+
+          if (get_alarm_trigger_minutes (self->event, alarm) == get_alarm_trigger_minutes (self->event, aux))
+            {
+              other_alarm = aux;
+              break;
+            }
+        }
+
+      if (!other_alarm)
+        GCAL_RETURN (TRUE);
+
+      /* TODO: this certainly needs deeper comparisons! */
+    }
+
+  GCAL_RETURN (FALSE);
+}
+
 static void
 gcal_event_editor_section_iface_init (GcalEventEditorSectionInterface *iface)
 {
   iface->set_event = gcal_reminders_section_set_event;
   iface->apply = gcal_reminders_section_apply;
+  iface->changed = gcal_reminders_section_changed;
 }
 
 
diff --git a/src/gui/event-editor/gcal-schedule-section.c b/src/gui/event-editor/gcal-schedule-section.c
index 7f13d9a7..91b09fda 100644
--- a/src/gui/event-editor/gcal-schedule-section.c
+++ b/src/gui/event-editor/gcal-schedule-section.c
@@ -641,11 +641,68 @@ gcal_schedule_section_apply (GcalEventEditorSection *section)
   GCAL_EXIT;
 }
 
+static gboolean
+gcal_schedule_section_changed (GcalEventEditorSection *section)
+{
+  g_autoptr (GDateTime) start_date = NULL;
+  g_autoptr (GDateTime) end_date = NULL;
+  GcalScheduleSection *self;
+  gboolean was_all_day;
+  gboolean all_day;
+
+  GCAL_ENTRY;
+
+  self = GCAL_SCHEDULE_SECTION (section);
+  all_day = gtk_switch_get_active (self->all_day_switch);
+  was_all_day = gcal_event_get_all_day (self->event);
+
+  /* All day */
+  if (all_day != was_all_day)
+    GCAL_RETURN (TRUE);
+
+  /* Start date */
+  start_date = get_date_start (self);
+  if (!g_date_time_equal (start_date, gcal_event_get_date_start (self->event)))
+    GCAL_RETURN (TRUE);
+
+  /* End date */
+  end_date = get_date_end (self);
+  if (gtk_switch_get_active (self->all_day_switch))
+    {
+      g_autoptr (GDateTime) fake_end_date = g_date_time_add_days (end_date, 1);
+      gcal_set_date_time (&end_date, fake_end_date);
+    }
+  else if (!all_day && was_all_day)
+    {
+      /* When an all day event is changed to be not an all day event, we
+       * need to correct for the fact that the event's timezone was until
+       * now set to UTC. That means we need to change the timezone to
+       * localtime now, or else it will be saved incorrectly.
+       */
+      GDateTime *localtime_date;
+
+      localtime_date = g_date_time_to_local (start_date);
+      g_clear_pointer (&start_date, g_date_time_unref);
+      start_date = localtime_date;
+
+      localtime_date = g_date_time_to_local (end_date);
+      g_clear_pointer (&end_date, g_date_time_unref);
+      end_date = localtime_date;
+    }
+
+  if (!g_date_time_equal (end_date, gcal_event_get_date_end (self->event)))
+    GCAL_RETURN (TRUE);
+
+  /* Recurrency */
+  GCAL_RETURN (gcal_schedule_section_recurrence_changed (self));
+}
+
 static void
 gcal_event_editor_section_iface_init (GcalEventEditorSectionInterface *iface)
 {
   iface->set_event = gcal_schedule_section_set_event;
   iface->apply = gcal_schedule_section_apply;
+  iface->changed = gcal_schedule_section_changed;
 }
 
 
@@ -749,3 +806,26 @@ gcal_schedule_section_init (GcalScheduleSection *self)
 {
   gtk_widget_init_template (GTK_WIDGET (self));
 }
+
+gboolean
+gcal_schedule_section_recurrence_changed (GcalScheduleSection *self)
+{
+  g_autoptr (GcalRecurrence) recurrence = NULL;
+  GcalRecurrenceFrequency freq;
+
+  g_return_val_if_fail (GCAL_IS_SCHEDULE_SECTION (self), FALSE);
+
+  freq = gtk_combo_box_get_active (GTK_COMBO_BOX (self->repeat_combo));
+  if (freq == GCAL_RECURRENCE_NO_REPEAT && !gcal_event_get_recurrence (self->event))
+    GCAL_RETURN (FALSE);
+
+  recurrence = gcal_recurrence_new ();
+  recurrence->frequency = gtk_combo_box_get_active (GTK_COMBO_BOX (self->repeat_combo));
+  recurrence->limit_type = gtk_combo_box_get_active (GTK_COMBO_BOX (self->repeat_duration_combo));
+  if (recurrence->limit_type == GCAL_RECURRENCE_UNTIL)
+    recurrence->limit.until = gcal_date_selector_get_date (GCAL_DATE_SELECTOR (self->until_date_selector));
+  else if (recurrence->limit_type == GCAL_RECURRENCE_COUNT)
+    recurrence->limit.count = gtk_spin_button_get_value_as_int (GTK_SPIN_BUTTON 
(self->number_of_occurrences_spin));
+
+  GCAL_RETURN (!gcal_recurrence_is_equal (recurrence, gcal_event_get_recurrence (self->event)));
+}
diff --git a/src/gui/event-editor/gcal-schedule-section.h b/src/gui/event-editor/gcal-schedule-section.h
index 211bc4b0..ee676a82 100644
--- a/src/gui/event-editor/gcal-schedule-section.h
+++ b/src/gui/event-editor/gcal-schedule-section.h
@@ -27,4 +27,6 @@ G_BEGIN_DECLS
 #define GCAL_TYPE_SCHEDULE_SECTION (gcal_schedule_section_get_type())
 G_DECLARE_FINAL_TYPE (GcalScheduleSection, gcal_schedule_section, GCAL, SCHEDULE_SECTION, GtkBox)
 
+gboolean             gcal_schedule_section_recurrence_changed    (GcalScheduleSection *self);
+
 G_END_DECLS
diff --git a/src/gui/event-editor/gcal-summary-section.c b/src/gui/event-editor/gcal-summary-section.c
index 401a8c9b..d1cf3b84 100644
--- a/src/gui/event-editor/gcal-summary-section.c
+++ b/src/gui/event-editor/gcal-summary-section.c
@@ -99,11 +99,29 @@ gcal_reminders_section_apply (GcalEventEditorSection *section)
   GCAL_EXIT;
 }
 
+static gboolean
+gcal_reminders_section_changed (GcalEventEditorSection *section)
+{
+  GcalSummarySection *self;
+  const gchar *event_location;
+  const gchar *event_summary;
+
+  GCAL_ENTRY;
+
+  self = GCAL_SUMMARY_SECTION (section);
+  event_summary = gcal_event_get_summary (self->event);
+  event_location = gcal_event_get_location (self->event);
+
+  GCAL_RETURN (g_strcmp0 (event_summary, gtk_editable_get_text (self->summary_entry)) != 0 ||
+               g_strcmp0 (event_location, gtk_editable_get_text (self->location_entry)) != 0);
+}
+
 static void
 gcal_event_editor_section_iface_init (GcalEventEditorSectionInterface *iface)
 {
   iface->set_event = gcal_reminders_section_set_event;
   iface->apply = gcal_reminders_section_apply;
+  iface->changed = gcal_reminders_section_changed;
 }