Make appearance.calendarview more explicit in config file

Instead of using 0 or 1 as a value for `appearance.calendarview`,
introduce the more explicit "monthly" and "weekly".

Also update `scripts/calcurse-upgrade.sh` to reflect the change.

Signed-off-by: Baptiste Jonglez <baptiste--git@jonglez.org>
Signed-off-by: Lukas Fleischer <calcurse@cryptocrack.de>

src/calcurse.h

@@ -360,6 +360,13 @@ struct recur_event {
   char *note;                   /* note attached to event */
 };
 
+/* Available view for the calendar panel. */
+enum {
+  CAL_MONTH_VIEW,
+  CAL_WEEK_VIEW,
+  CAL_VIEWS
+};
+
 struct notify_app {
   long time;
   int got_app;

src/calendar.c

@@ -57,12 +57,6 @@
 
 #define ISLEAP(y) ((((y) % 4) == 0 && ((y) % 100) != 0) || ((y) % 400) == 0)
 
-enum {
-  CAL_MONTH_VIEW,
-  CAL_WEEK_VIEW,
-  CAL_VIEWS
-};
-
 enum pom {
   NO_POM,
   FIRST_QUARTER,

src/config.c

@@ -196,7 +196,13 @@ static int config_parse_color_pair(int *dest1, int *dest2, const char *val)
 
 static int config_parse_calendar_view(void *dummy, const char *val)
 {
-  calendar_set_view(atoi(val));
+  if (!strcmp(val, "monthly"))
+    calendar_set_view(CAL_MONTH_VIEW);
+  else if (!strcmp(val, "weekly"))
+    calendar_set_view(CAL_WEEK_VIEW);
+  else
+    return 0;
+
   return 1;
 }
 
@@ -350,8 +356,12 @@ static void config_color_theme_name(char *theme_name)
 
 static int config_serialize_calendar_view(char *buf, void *dummy)
 {
-  int tmp = calendar_get_view();
-  return config_serialize_int(buf, &tmp);
+  if (calendar_get_view() == CAL_WEEK_VIEW)
+    strcpy(buf, "weekly");
+  else
+    strcpy(buf, "monthly");
+
+  return 1;
 }
 
 static int config_serialize_first_day_of_week(char *buf, void *dummy)