mirror of
https://git.sr.ht/~ashkeel/strimertul
synced 2024-09-20 02:00:49 +00:00
386 lines
8.1 KiB
Go
386 lines
8.1 KiB
Go
package loyalty
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import (
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"errors"
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"fmt"
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"strings"
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"sync"
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"time"
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"github.com/strimertul/strimertul/modules"
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"github.com/strimertul/strimertul/modules/database"
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jsoniter "github.com/json-iterator/go"
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"go.uber.org/zap"
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)
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var json = jsoniter.ConfigFastest
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var (
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ErrRedeemInCooldown = errors.New("redeem is on cooldown")
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ErrGoalNotFound = errors.New("goal not found")
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ErrGoalAlreadyReached = errors.New("goal already reached")
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)
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type Manager struct {
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points map[string]PointsEntry
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config Config
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rewards RewardStorage
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goals GoalStorage
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queue RedeemQueueStorage
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mu sync.Mutex
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db *database.DBModule
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logger *zap.Logger
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cooldowns map[string]time.Time
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}
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func Register(manager *modules.Manager) error {
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db, ok := manager.Modules["db"].(*database.DBModule)
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if !ok {
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return errors.New("db module not found")
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}
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logger := manager.Logger(modules.ModuleLoyalty)
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loyalty := &Manager{
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logger: logger,
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db: db,
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mu: sync.Mutex{},
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cooldowns: make(map[string]time.Time),
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}
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// Get data from DB
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if err := db.GetJSON(ConfigKey, &loyalty.config); err != nil {
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if !errors.Is(err, database.ErrEmptyKey) {
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return fmt.Errorf("could not retrieve loyalty config: %w", err)
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}
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loyalty.config.Enabled = false
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}
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// Retrieve configs
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if err := db.GetJSON(RewardsKey, &loyalty.rewards); err != nil {
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if !errors.Is(err, database.ErrEmptyKey) {
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return err
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}
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}
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if err := db.GetJSON(GoalsKey, &loyalty.goals); err != nil {
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if !errors.Is(err, database.ErrEmptyKey) {
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return err
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}
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}
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if err := db.GetJSON(QueueKey, &loyalty.queue); err != nil {
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if !errors.Is(err, database.ErrEmptyKey) {
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return err
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}
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}
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// Retrieve user points
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points, err := db.GetAll(PointsPrefix)
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if err != nil {
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if !errors.Is(err, database.ErrEmptyKey) {
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return err
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}
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points = make(map[string]string)
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}
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loyalty.points = make(map[string]PointsEntry)
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for k, v := range points {
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var entry PointsEntry
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err := json.UnmarshalFromString(v, &entry)
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if err != nil {
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return err
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}
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loyalty.points[k] = entry
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}
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// Subscribe for changes
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go db.Subscribe(loyalty.update, "loyalty/")
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// Register module
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manager.Modules[modules.ModuleLoyalty] = loyalty
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return nil
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}
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func (m *Manager) Status() modules.ModuleStatus {
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config := m.Config()
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if !config.Enabled {
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return modules.ModuleStatus{
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Enabled: false,
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}
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}
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return modules.ModuleStatus{
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Enabled: true,
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Working: true,
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Data: struct{}{},
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StatusString: "",
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}
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}
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func (m *Manager) Close() error {
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// TODO Stop subscriptions?
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return nil
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}
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func (m *Manager) update(key, value string) {
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var err error
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// Check for config changes/RPC
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switch key {
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case ConfigKey:
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err = func() error {
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m.mu.Lock()
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defer m.mu.Unlock()
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return json.UnmarshalFromString(value, &m.config)
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}()
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case GoalsKey:
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err = func() error {
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m.mu.Lock()
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defer m.mu.Unlock()
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return json.UnmarshalFromString(value, &m.goals)
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}()
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case RewardsKey:
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err = func() error {
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m.mu.Lock()
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defer m.mu.Unlock()
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return json.UnmarshalFromString(value, &m.rewards)
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}()
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case QueueKey:
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err = func() error {
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m.mu.Lock()
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defer m.mu.Unlock()
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return json.UnmarshalFromString(value, &m.queue)
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}()
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case CreateRedeemRPC:
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var redeem Redeem
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err = json.UnmarshalFromString(value, &redeem)
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if err == nil {
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err = m.AddRedeem(redeem)
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}
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case RemoveRedeemRPC:
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var redeem Redeem
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err = json.UnmarshalFromString(value, &redeem)
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if err == nil {
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err = m.RemoveRedeem(redeem)
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}
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default:
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// Check for prefix changes
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switch {
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// User point changed
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case strings.HasPrefix(key, PointsPrefix):
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var entry PointsEntry
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err = json.UnmarshalFromString(value, &entry)
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user := key[len(PointsPrefix):]
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func() {
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m.mu.Lock()
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defer m.mu.Unlock()
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m.points[user] = entry
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}()
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}
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}
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if err != nil {
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m.logger.Error("subscribe error: invalid JSON received on key", zap.Error(err), zap.String("key", key))
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} else {
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m.logger.Debug("updated key", zap.String("key", key))
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}
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}
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func (m *Manager) GetPoints(user string) int64 {
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m.mu.Lock()
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defer m.mu.Unlock()
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points, ok := m.points[user]
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if ok {
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return points.Points
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}
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return 0
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}
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func (m *Manager) setPoints(user string, points int64) error {
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m.mu.Lock()
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defer m.mu.Unlock()
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m.points[user] = PointsEntry{
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Points: points,
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}
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return m.db.PutJSON(PointsPrefix+user, m.points[user])
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}
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func (m *Manager) GivePoints(pointsToGive map[string]int64) error {
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// Add points to each user
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for user, points := range pointsToGive {
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balance := m.GetPoints(user)
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if err := m.setPoints(user, balance+points); err != nil {
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return err
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}
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}
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return nil
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}
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func (m *Manager) TakePoints(pointsToTake map[string]int64) error {
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// Add points to each user
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for user, points := range pointsToTake {
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balance := m.GetPoints(user)
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if err := m.setPoints(user, balance-points); err != nil {
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return err
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}
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}
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return nil
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}
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func (m *Manager) saveQueue() error {
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return m.db.PutJSON(QueueKey, m.queue)
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}
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func (m *Manager) GetRewardCooldown(rewardID string) time.Time {
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m.mu.Lock()
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defer m.mu.Unlock()
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cooldown, ok := m.cooldowns[rewardID]
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if !ok {
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// Return zero time for a reward with no cooldown
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return time.Time{}
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}
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return cooldown
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}
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func (m *Manager) AddRedeem(redeem Redeem) error {
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m.mu.Lock()
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defer m.mu.Unlock()
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// Add to local list
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m.queue = append(m.queue, redeem)
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// Send redeem event
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if err := m.db.PutJSON(RedeemEvent, redeem); err != nil {
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return err
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}
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// Add cooldown if applicable
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if redeem.Reward.Cooldown > 0 {
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m.cooldowns[redeem.Reward.ID] = time.Now().Add(time.Second * time.Duration(redeem.Reward.Cooldown))
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}
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// Save points
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return m.saveQueue()
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}
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func (m *Manager) PerformRedeem(redeem Redeem) error {
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// Check cooldown
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if time.Now().Before(m.GetRewardCooldown(redeem.Reward.ID)) {
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return ErrRedeemInCooldown
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}
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// Add redeem
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err := m.AddRedeem(redeem)
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if err != nil {
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return err
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}
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// Remove points from user
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return m.TakePoints(map[string]int64{redeem.Username: redeem.Reward.Price})
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}
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func (m *Manager) RemoveRedeem(redeem Redeem) error {
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m.mu.Lock()
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defer m.mu.Unlock()
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for index, queued := range m.queue {
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if queued.When == redeem.When && queued.Username == redeem.Username && queued.Reward.ID == redeem.Reward.ID {
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// Remove redemption from list
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m.queue = append(m.queue[:index], m.queue[index+1:]...)
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// Save points
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return m.saveQueue()
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}
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}
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return errors.New("redeem not found")
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}
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func (m *Manager) SaveGoals() error {
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return m.db.PutJSON(GoalsKey, m.goals)
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}
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func (m *Manager) Goals() []Goal {
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m.mu.Lock()
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defer m.mu.Unlock()
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return m.goals[:]
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}
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func (m *Manager) ContributeGoal(goal Goal, user string, points int64) error {
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m.mu.Lock()
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defer m.mu.Unlock()
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for i, savedGoal := range m.goals {
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if savedGoal.ID != goal.ID {
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continue
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}
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m.goals[i].Contributed += points
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m.goals[i].Contributors[user] += points
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return m.SaveGoals()
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}
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return ErrGoalNotFound
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}
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func (m *Manager) PerformContribution(goal Goal, user string, points int64) error {
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// Get user balance
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balance := m.GetPoints(user)
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// If user specified more points than they have, pick the maximum possible
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if points > balance {
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points = balance
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}
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// Check if goal was reached already
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if goal.Contributed >= goal.TotalGoal {
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return ErrGoalAlreadyReached
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}
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// If remaining points are lower than what user is contributing, only take what's needed
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remaining := goal.TotalGoal - goal.Contributed
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if points > remaining {
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points = remaining
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}
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// Remove points from user
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if err := m.TakePoints(map[string]int64{user: points}); err != nil {
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return err
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}
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// Add points to goal
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return m.ContributeGoal(goal, user, points)
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}
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func (m *Manager) Rewards() []Reward {
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m.mu.Lock()
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defer m.mu.Unlock()
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return m.rewards[:]
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}
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func (m *Manager) GetReward(id string) Reward {
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m.mu.Lock()
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defer m.mu.Unlock()
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for _, reward := range m.rewards {
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if reward.ID == id {
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return reward
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}
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}
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return Reward{}
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}
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func (m *Manager) GetGoal(id string) Goal {
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m.mu.Lock()
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defer m.mu.Unlock()
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for _, goal := range m.goals {
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if goal.ID == id {
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return goal
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}
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}
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return Goal{}
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}
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func (m *Manager) Config() Config {
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m.mu.Lock()
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defer m.mu.Unlock()
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return m.config
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}
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