Initial cloud-services repo - gateway service + pkg modules

pkg/superset/cache_acc_token.go

@@ -0,0 +1,28 @@
+package superset
+
+import (
+	"fmt"
+
+	"fiskerinc.com/modules/redis"
+	"github.com/pkg/errors"
+)
+
+var errTokenNotFound = errors.New("token isn't found")
+
+func getCachedAccToken(c redis.Client) (string, error) {
+	res, err := c.Get(redis.SupersetAccTokenKey)
+	if err != nil {
+		return "", err
+	}
+
+	if res == nil {
+		return "", errors.WithStack(errTokenNotFound)
+	}
+
+	tokenBytes, ok := res.([]byte)
+	if !ok {
+		return "", errors.WithStack(fmt.Errorf("invalid superset access token type (expected []byte]); access token: %v", res))
+	}
+
+	return string(tokenBytes), nil
+}