api: fix pagination token that's returned to match what has been passed

api/v1/models.go

@@ -198,7 +198,7 @@ type Notification struct {
 	New      *VulnerabilityWithLayers `json:"New,omitempty"`
 }
 
-func NotificationFromDatabaseModel(dbNotification database.VulnerabilityNotification, limit int, page, nextPage database.VulnerabilityNotificationPageNumber, key string) Notification {
+func NotificationFromDatabaseModel(dbNotification database.VulnerabilityNotification, limit int, pageToken string, nextPage database.VulnerabilityNotificationPageNumber, key string) Notification {
 	var oldVuln *VulnerabilityWithLayers
 	if dbNotification.OldVulnerability != nil {
 		v := VulnerabilityWithLayersFromDatabaseModel(*dbNotification.OldVulnerability)
@@ -235,7 +235,7 @@ func NotificationFromDatabaseModel(dbNotification database.VulnerabilityNotifica
 		Notified: notified,
 		Deleted:  deleted,
 		Limit:    limit,
-		Page:     pageNumberToToken(page, key),
+		Page:     pageToken,
 		NextPage: nextPageStr,
 		Old:      oldVuln,
 		New:      newVuln,

api/v1/routes.go

@@ -381,6 +381,7 @@ func getNotification(w http.ResponseWriter, r *http.Request, p httprouter.Params
 		return getNotificationRoute, http.StatusBadRequest
 	}
 
+	var pageToken string
 	page := database.VulnerabilityNotificationFirstPage
 	pageStrs, pageExists := query["page"]
 	if pageExists {
@@ -389,6 +390,9 @@ func getNotification(w http.ResponseWriter, r *http.Request, p httprouter.Params
 			writeResponse(w, r, http.StatusBadRequest, NotificationEnvelope{Error: &Error{"invalid page format: " + err.Error()}})
 			return getNotificationRoute, http.StatusBadRequest
 		}
+		pageToken = pageStrs[0]
+	} else {
+		pageToken = pageNumberToToken(page, ctx.Config.PaginationKey)
 	}
 
 	dbNotification, nextPage, err := ctx.Store.GetNotification(p.ByName("notificationName"), limit, page)
@@ -400,7 +404,7 @@ func getNotification(w http.ResponseWriter, r *http.Request, p httprouter.Params
 		return getNotificationRoute, http.StatusInternalServerError
 	}
 
-	notification := NotificationFromDatabaseModel(dbNotification, limit, page, nextPage, ctx.Config.PaginationKey)
+	notification := NotificationFromDatabaseModel(dbNotification, limit, pageToken, nextPage, ctx.Config.PaginationKey)
 
 	writeResponse(w, r, http.StatusOK, NotificationEnvelope{Notification: &notification})
 	return getNotificationRoute, http.StatusOK