69 lines
1.3 KiB
Go
69 lines
1.3 KiB
Go
package main
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import (
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"context"
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"log/slog"
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"sync"
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)
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type SubscriberReadModel struct {
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subscribers map[string]string // map[subscriberID]email
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lock sync.RWMutex
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}
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func NewSubscriberReadModel() *SubscriberReadModel {
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return &SubscriberReadModel{
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subscribers: make(map[string]string),
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}
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}
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func (m *SubscriberReadModel) OnSubscribed(ctx context.Context, event *SubscriberSubscribed) error {
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m.lock.Lock()
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defer m.lock.Unlock()
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m.subscribers[event.SubscriberId] = event.Email
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slog.Info(
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"Subscriber added",
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"subscriber_id", event.SubscriberId,
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"email", event.Email,
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)
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return nil
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}
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func (m *SubscriberReadModel) OnUnsubscribed(ctx context.Context, event *SubscriberUnsubscribed) error {
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m.lock.Lock()
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defer m.lock.Unlock()
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delete(m.subscribers, event.SubscriberId)
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slog.Info(
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"Subscriber removed",
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"subscriber_id", event.SubscriberId,
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)
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return nil
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}
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func (m *SubscriberReadModel) OnEmailUpdated(ctx context.Context, event *SubscriberEmailUpdated) error {
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m.lock.Lock()
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defer m.lock.Unlock()
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m.subscribers[event.SubscriberId] = event.NewEmail
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slog.Info(
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"Subscriber updated",
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"subscriber_id", event.SubscriberId,
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"email", event.NewEmail,
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)
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return nil
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}
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func (m *SubscriberReadModel) GetSubscriberCount() int {
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m.lock.RLock()
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defer m.lock.RUnlock()
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return len(m.subscribers)
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}
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