Init

lib/pubsub/adapters/redispubsub.go

@@ -0,0 +1,70 @@
+package adapters
+
+import (
+	"context"
+	"os"
+
+	"atri.dad/lib"
+	"atri.dad/lib/pubsub"
+	"github.com/joho/godotenv"
+	"github.com/redis/go-redis/v9"
+)
+
+var RedisClient *redis.Client
+
+type RedisPubSubMessage struct {
+	pubsub *redis.PubSub
+}
+
+// RedisPubSub is a Redis implementation of the PubSub interface.
+type RedisPubSub struct {
+	Client *redis.Client
+}
+
+func NewRedisClient() *redis.Client {
+	if RedisClient != nil {
+		return RedisClient
+	}
+
+	godotenv.Load(".env")
+	redis_host := os.Getenv("REDIS_HOST")
+	redis_password := os.Getenv("REDIS_PASSWORD")
+
+	lib.LogInfo.Printf("\n[PUBSUB/REDIS]Connecting to Redis at %s\n", redis_host)
+	RedisClient = redis.NewClient(&redis.Options{
+		Addr:     redis_host,
+		Password: redis_password,
+		DB:       0,
+	})
+
+	return RedisClient
+}
+
+func (m *RedisPubSubMessage) ReceiveMessage(ctx context.Context) (*pubsub.Message, error) {
+	msg, err := m.pubsub.ReceiveMessage(ctx)
+	if err != nil {
+		return nil, err
+	}
+	lib.LogInfo.Printf("\n[PUBSUB/REDIS] Received message: %s\n", msg.Payload)
+	return &pubsub.Message{Payload: msg.Payload}, nil
+}
+
+func (ps *RedisPubSub) SubscribeToChannel(channel string) (pubsub.PubSubMessage, error) {
+	pubsub := ps.Client.Subscribe(context.Background(), channel)
+	_, err := pubsub.Receive(context.Background())
+	if err != nil {
+		return nil, err
+	}
+	lib.LogInfo.Printf("\n[PUBSUB/REDIS] Subscribed to channel %s\n", channel)
+
+	return &RedisPubSubMessage{pubsub: pubsub}, nil
+}
+
+func (r *RedisPubSub) PublishToChannel(channel string, message string) error {
+	err := r.Client.Publish(context.Background(), channel, message).Err()
+	if err != nil {
+		return err
+	}
+	lib.LogInfo.Printf("\n[PUBSUB/REDIS] Publishing message to channel %s: %s\n", channel, message)
+	return nil
+}