satellite/satellitedb: Add coupon_codes table and allow optional link…

… to coupons table

The coupon_codes table will allow for administrators to create new promo
codes associated with coupon information (amount, duration, etc...).

A user will be able to enter a promo code (aka coupon code) in order to
apply a new coupon to their account. The coupon in the coupons table is
linked to the template defined in the coupon_codes table.

Change-Id: I50e49fa92afbc6aa9d01d8a895c069efb59e472b

satellite/satellitedb/coupons.go

@@ -51,6 +51,7 @@ func (coupons *coupons) Insert(ctx context.Context, coupon payments.Coupon) (_ p
 		dbx.Coupon_Type(int(coupon.Type)),
 		dbx.Coupon_Status(int(coupon.Status)),
 		dbx.Coupon_Duration(int64(coupon.Duration)),
+		dbx.Coupon_Create_Fields{},
 	)
 	if err != nil {
 		return payments.Coupon{}, err

satellite/satellitedb/dbx/satellitedb.dbx

@@ -1091,6 +1091,29 @@ read one (
     where stripecoinpayments_tx_conversion_rate.tx_id = ?
 )
 
+model coupon_code (
+    key    id
+    unique name
+
+    field id          blob
+    field name        text
+    field amount      int64
+    field description text
+    field type        int
+    field duration    int64
+
+    field created_at timestamp ( autoinsert )
+)
+
+create coupon_code ()
+delete coupon_code (
+    where coupon_code.name = ?
+)
+read one (
+    select coupon_code
+    where coupon_code.name = ?
+)
+
 model coupon (
     key id
 
@@ -1101,6 +1124,7 @@ model coupon (
     field type             int
     field status           int   ( updatable )
     field duration         int64
+    field coupon_code_name text  ( nullable )
 
     field created_at timestamp ( autoinsert )
 )