go integration and wikipedia

backend/internal/cache/redis.go

@@ -0,0 +1,72 @@
+package cache
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+	"time"
+
+	"github.com/redis/go-redis/v9"
+)
+
+var Client *redis.Client
+
+func Connect(redisURL string) error {
+	opt, err := redis.ParseURL(redisURL)
+	if err != nil {
+		return fmt.Errorf("failed to parse redis URL: %w", err)
+	}
+
+	Client = redis.NewClient(opt)
+
+	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
+	defer cancel()
+
+	if err = Client.Ping(ctx).Err(); err != nil {
+		return fmt.Errorf("failed to ping redis: %w", err)
+	}
+
+	return nil
+}
+
+func Close() {
+	if Client != nil {
+		Client.Close()
+	}
+}
+
+func GetClient() *redis.Client {
+	return Client
+}
+
+func SearchKey(query, lang string, page, perPage int) string {
+	return fmt.Sprintf("search:%s:%s:%d:%d", query, lang, page, perPage)
+}
+
+func NewsKey(newsID int64, lang string) string {
+	return fmt.Sprintf("news:%d:%s", newsID, lang)
+}
+
+func FeedKey(feedID int64) string {
+	return fmt.Sprintf("feed:%d", feedID)
+}
+
+func Set(ctx context.Context, key string, value interface{}, expiration time.Duration) error {
+	data, err := json.Marshal(value)
+	if err != nil {
+		return err
+	}
+	return Client.Set(ctx, key, data, expiration).Err()
+}
+
+func Get(ctx context.Context, key string) (string, error) {
+	return Client.Get(ctx, key).Result()
+}
+
+func Unmarshal(data []byte, v interface{}) error {
+	return json.Unmarshal(data, v)
+}
+
+func Marshal(v interface{}) ([]byte, error) {
+	return json.Marshal(v)
+}