storj/satellite/rewards/partners_service.go

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// Copyright (C) 2019 Storj Labs, Inc.
// See LICENSE for copying information.
package rewards
import (
"context"
"encoding/base32"
"path"
"github.com/zeebo/errs"
"go.uber.org/zap"
)
var (
// ErrPartners is the default error class for partners package.
ErrPartners = errs.Class("partners")
// ErrPartnerNotExist is returned when a particular partner does not exist.
ErrPartnerNotExist = errs.Class("partner does not exist")
)
// PartnersDB allows access to partners database.
//
// architecture: Database
type PartnersDB interface {
// All returns all partners.
All(ctx context.Context) ([]PartnerInfo, error)
// ByName returns partner definitions for a given name.
ByName(ctx context.Context, name string) (PartnerInfo, error)
// ByID returns partner definition corresponding to an id.
ByID(ctx context.Context, id string) (PartnerInfo, error)
// ByUserAgent returns partner definition corresponding to an user agent string.
ByUserAgent(ctx context.Context, agent string) (PartnerInfo, error)
}
// PartnersService allows manipulating and accessing partner information.
//
// architecture: Service
type PartnersService struct {
log *zap.Logger
db PartnersDB
domains []string
}
// NewPartnersService returns a service for handling partner information.
func NewPartnersService(log *zap.Logger, db PartnersDB, domains []string) *PartnersService {
return &PartnersService{
log: log,
db: db,
domains: domains,
}
}
// parnterIDEncoding is base32 without padding
var parnterIDEncoding = base32.StdEncoding.WithPadding(base32.NoPadding)
// GeneratePartnerLink returns partner referral link.
func (service *PartnersService) GeneratePartnerLink(ctx context.Context, offerName string) ([]string, error) {
partner, err := service.db.ByName(ctx, offerName)
if err != nil {
return nil, ErrPartners.Wrap(err)
}
var links []string
for _, domain := range service.domains {
encoded := parnterIDEncoding.EncodeToString([]byte(partner.ID))
links = append(links, path.Join(domain, "ref", encoded))
}
return links, nil
}
// GetActiveOffer returns an offer that is active based on its type.
func (service *PartnersService) GetActiveOffer(ctx context.Context, offers Offers, offerType OfferType, partnerID string) (offer *Offer, err error) {
if len(offers) < 1 {
return nil, ErrOfferNotExist.New("no active offers")
}
switch offerType {
case Partner:
if partnerID == "" {
return nil, errs.New("partner ID is empty")
}
partnerInfo, err := service.db.ByID(ctx, partnerID)
if err != nil {
return nil, ErrPartnerNotExist.Wrap(err)
}
for i := range offers {
if offers[i].Name == partnerInfo.Name {
offer = &offers[i]
}
}
default:
if len(offers) > 1 {
return nil, errs.New("multiple active offers found")
}
offer = &offers[0]
}
return offer, nil
}
// PartnerByName looks up partner by name.
func (service *PartnersService) PartnerByName(ctx context.Context, name string) (PartnerInfo, error) {
return service.db.ByName(ctx, name)
}
// All returns all partners.
func (service *PartnersService) All(ctx context.Context) ([]PartnerInfo, error) {
return service.db.All(ctx)
}