feat: add url shortner

internal/repository/redis.go

@@ -0,0 +1,45 @@
+package repository
+
+import (
+	"context"
+	"fmt"
+	"time"
+
+	"github.com/redis/go-redis/v9"
+	"go.uber.org/zap"
+)
+
+type Redis struct {
+	Client *redis.Client
+	logger *zap.Logger
+}
+
+func NewRedis(ctx context.Context, uri string, logger *zap.Logger) (*Redis, error) {
+	if uri == "" {
+		return nil, fmt.Errorf("redis URI is empty")
+	}
+
+	opts, err := redis.ParseURL(uri)
+	if err != nil {
+		return nil, fmt.Errorf("redis parse URL: %w", err)
+	}
+
+	client := redis.NewClient(opts)
+
+	pingCtx, cancel := context.WithTimeout(ctx, 5*time.Second)
+	defer cancel()
+	if err := client.Ping(pingCtx).Err(); err != nil {
+		_ = client.Close()
+		return nil, fmt.Errorf("redis ping: %w", err)
+	}
+
+	logger.Info("connected to Redis")
+	return &Redis{Client: client, logger: logger}, nil
+}
+
+func (r *Redis) Close() error {
+	if r == nil || r.Client == nil {
+		return nil
+	}
+	return r.Client.Close()
+}