From 72a783bdd3459fa0c4455224a2fd7327358f205e Mon Sep 17 00:00:00 2001
From: Evan Chen <evanchen@kumoly.io>
Date: Sun, 9 Jan 2022 16:48:10 +0800
Subject: [PATCH] update

---
 calendar/event.go | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/calendar/event.go b/calendar/event.go
index ccec497..286d517 100644
--- a/calendar/event.go
+++ b/calendar/event.go
@@ -37,6 +37,16 @@ func (e *Event) BeforeSave(tx *gorm.DB) (err error) {
 		tx.Raw("select name from calendars where id = ?", e.CalendarID).Scan(&loc)
 		e.Location = loc
 	}
+
+	// test for collide
+	cnt := 0
+	db.Raw(`select count(*) from events e where 
+		(? >= "start" and ? <= "end" )
+		or
+		(? >= "start" and ? <= "end"  )
+		and calendar_id = ?`,
+		e.End, e.End, e.Start, e.Start, e.CalendarID).Scan(&cnt)
+
 	return
 }