referrals: add "use expiry" option

adds an option when enabling referrals to use the duration of the source
invited (i.e., months, days, hours) for the referral invite. If enabled,
the user won't be able to make a new referral link after it expires. For
referrals enabled for new users via a profile, the clock starts ticking
as soon as the account is created.

api-profiles.go

@@ -130,15 +130,17 @@ func (app *appContext) DeleteProfile(gc *gin.Context) {
 // @Produce json
 // @Param profile path string true "name of profile to enable referrals for."
 // @Param invite path string true "invite code to create referral template from."
+// @Param useExpiry path string true "with-expiry or none."
 // @Success 200 {object} boolResponse
 // @Failure 400 {object} stringResponse
 // @Failure 500 {object} stringResponse
-// @Router /profiles/referral/{profile}/{invite} [post]
+// @Router /profiles/referral/{profile}/{invite}/{useExpiry} [post]
 // @Security Bearer
 // @tags Profiles & Settings
 func (app *appContext) EnableReferralForProfile(gc *gin.Context) {
 	profileName := gc.Param("profile")
 	invCode := gc.Param("invite")
+	useExpiry := gc.Param("useExpiry") == "with-expiry"
 	inv, ok := app.storage.GetInvitesKey(invCode)
 	if !ok {
 		respond(400, "Invalid invite code", gc)
@@ -154,9 +156,15 @@ func (app *appContext) EnableReferralForProfile(gc *gin.Context) {
 
 	// Generate new code for referral template
 	inv.Code = GenerateInviteCode()
+	expiryDelta := inv.ValidTill.Sub(inv.Created)
 	inv.Created = time.Now()
-	inv.ValidTill = inv.Created.Add(REFERRAL_EXPIRY_DAYS * 24 * time.Hour)
+	if useExpiry {
+		inv.ValidTill = inv.Created.Add(expiryDelta)
+	} else {
+		inv.ValidTill = inv.Created.Add(REFERRAL_EXPIRY_DAYS * 24 * time.Hour)
+	}
 	inv.IsReferral = true
+	inv.UseReferralExpiry = useExpiry
 	// Since this is a template for multiple users, ReferrerJellyfinID is not set.
 	// inv.ReferrerJellyfinID = ...