Upload files to "v1"

v1/database.go

@@ -0,0 +1,22 @@
+package db
+
+import (
+	"angel_server/consts"
+	"database/sql"
+	"log"
+
+	_ "github.com/mattn/go-sqlite3"
+)
+
+func CheckLayer(db *sql.DB, layerID int) bool {
+	var exists bool
+
+	query := `SELECT EXISTS(SELECT 1 FROM layers WHERE layer_id = ?);`
+
+	err := consts.Db.QueryRow(query, layerID).Scan(&exists)
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	return exists
+}