Update Duel System Cooldown

- Able to set cooldown in "seconds" format.
- New `duel_time_interval` value will be applied to any existing cooldown
  if new value is reloaded in-game using `@reloadbattleconf`.
- Display the cooldown tick before can create new duel.

3 files changed, 13 insertions, 26 deletions

diff --git a/src/map/atcommand.c b/src/map/atcommand.c
index 3cd26079d..5d95e2c14 100644
--- a/src/map/atcommand.c
+++ b/src/map/atcommand.c
@@ -8048,10 +8048,11 @@ ACMD(duel)
 		return false;
 	}
 
-	if (!duel->checktime(sd)) {
+	int64 diff = duel->difftime(sd);
+	if (diff > 0) {
 		char output[CHAT_SIZE_MAX];
-		// "Duel: You can take part in duel only one time per %d minutes."
-		sprintf(output, msg_fd(fd,356), battle_config.duel_time_interval);
+		// "Duel: You can take part in duel again after %d secconds."
+		sprintf(output, msg_fd(fd,356), (int)diff);
 		clif->message(fd, output);
 		return false;
 	}
@@ -8101,10 +8102,11 @@ ACMD(leave)
 
 ACMD(accept)
 {
-	if (!duel->checktime(sd)) {
+	int64 diff = duel->difftime(sd);
+	if (diff > 0) {
 		char output[CHAT_SIZE_MAX];
-		// "Duel: You can take part in duel only one time per %d minutes."
-		sprintf(output, msg_fd(fd,356), battle_config.duel_time_interval);
+		// "Duel: You can take part in duel again after %d seconds."
+		sprintf(output, msg_fd(fd,356), (int)diff);
 		clif->message(fd, output);
 		return false;
 	}
diff --git a/src/map/duel.c b/src/map/duel.c
index dca040f83..c66fd6fc2 100644
--- a/src/map/duel.c
+++ b/src/map/duel.c
@@ -41,27 +41,12 @@ struct duel_interface *duel;
  *------------------------------------------*/
 static void duel_savetime(struct map_session_data *sd)
 {
-	time_t clock;
-	struct tm *t;
-
-	time(&clock);
-	t = localtime(&clock);
-
-	pc_setglobalreg(sd, script->add_variable("PC_LAST_DUEL_TIME"), t->tm_mday*24*60 + t->tm_hour*60 + t->tm_min);
+	pc_setglobalreg(sd, script->add_variable("PC_LAST_DUEL_TIME"), (int)time(NULL));
 }
 
-static int duel_checktime(struct map_session_data *sd)
+static int64 duel_difftime(struct map_session_data *sd)
 {
-	int diff;
-	time_t clock;
-	struct tm *t;
-
-	time(&clock);
-	t = localtime(&clock);
-
-	diff = t->tm_mday*24*60 + t->tm_hour*60 + t->tm_min - pc_readglobalreg(sd, script->add_variable("PC_LAST_DUEL_TIME") );
-
-	return !(diff >= 0 && diff < battle_config.duel_time_interval);
+	return (pc_readglobalreg(sd, script->add_variable("PC_LAST_DUEL_TIME")) + battle_config.duel_time_interval - (int)time(NULL));
 }
 
 static int duel_showinfo_sub(struct map_session_data *sd, va_list va)
@@ -233,7 +218,7 @@ void duel_defaults(void)
 	duel->reject = duel_reject;
 	duel->leave = duel_leave;
 	duel->showinfo = duel_showinfo;
-	duel->checktime = duel_checktime;
+	duel->difftime = duel_difftime;
 
 	duel->init = do_init_duel;
 	duel->final = do_final_duel;
diff --git a/src/map/duel.h b/src/map/duel.h
index 4e8985b96..1620ca891 100644
--- a/src/map/duel.h
+++ b/src/map/duel.h
@@ -52,7 +52,7 @@ struct duel_interface {
 	void (*reject) (const unsigned int did, struct map_session_data* sd);
 	void (*leave) (const unsigned int did, struct map_session_data* sd);
 	void (*showinfo) (const unsigned int did, struct map_session_data* sd);
-	int (*checktime) (struct map_session_data* sd);
+	int64 (*difftime) (struct map_session_data* sd);
 
 	void (*init) (bool minimal);
 	void (*final) (void);