add weight

internal/db/weight.go

@@ -0,0 +1,22 @@
+package db
+
+import "time"
+
+type Weight struct {
+	ChatID    int64     `bson:"chat_id"`
+	Weight    float64   `bson:"weight"`
+	CreatedAt time.Time `bson:"created_at"`
+	Username  string    `bson:"username"`
+}
+
+func NewWeight(
+	weight float64,
+	username string,
+) *Weight {
+	loc, _ := time.LoadLocation("Asia/Novosibirsk")
+	return &Weight{
+		Weight:    weight,
+		Username:  username,
+		CreatedAt: time.Now().In(loc),
+	}
+}