feat: implement Redis cache client (#20)

infrastructure/repository/redis/cache.go

@@ -0,0 +1,50 @@
+package redis
+
+import (
+	"context"
+	"time"
+
+	ozzo "github.com/go-ozzo/ozzo-validation/v4"
+	"github.com/redis/go-redis/v9"
+)
+
+// Cache is a Redis cache
+type Cache struct {
+	client  *redis.Client
+	options *Options
+}
+
+type Options struct {
+	Address           string
+	ConnectionTimeout time.Duration
+}
+
+func (o Options) Validate() error {
+	return ozzo.ValidateStruct(&o,
+		ozzo.Field(&o.Address, ozzo.Required),
+		ozzo.Field(&o.ConnectionTimeout, ozzo.Required, ozzo.Min(1*time.Second)),
+	)
+}
+
+// NewCache creates a new Cache
+func NewCache(options *Options) (*Cache, error) {
+	if err := options.Validate(); err != nil {
+		return nil, err
+	}
+
+	client := redis.NewClient(&redis.Options{
+		Addr: options.Address,
+	})
+
+	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
+	defer cancel()
+
+	if err := client.Ping(ctx).Err(); err != nil {
+		return nil, err
+	}
+
+	return &Cache{
+		client:  client,
+		options: options,
+	}, nil
+}