Progress meow

storage/cache.go

@@ -0,0 +1,47 @@
+package storage
+
+import (
+	"errors"
+	"strings"
+
+	"github.com/redis/go-redis/v9"
+)
+
+const (
+	cacheUserHandleToIdPrefix = "acc-name-to-id:"
+	cacheUserIdToAccPrefix    = "acc-id-to-data:"
+)
+
+var errCacheNotFound = errors.New("not found in cache")
+
+// Find an account id in cache using a given user handle
+func (s *Storage) cacheHandleToAccUid(handle string) (*string, error) {
+	// Where to put the data (in case it's found)
+	var target string
+	found, err := s.cache.Get(cacheUserHandleToIdPrefix+strings.TrimLeft(handle, "@"), &target)
+	// If nothing was found, check error
+	if !found {
+		// Case error is set and NOT redis' error for nothing found: Return that error
+		if err != nil && !errors.Is(err, redis.Nil) {
+			return nil, err
+		} else {
+			// Else return errCacheNotFound
+			return nil, errCacheNotFound
+		}
+	}
+	return &target, nil
+}
+
+// Find an account's data in cache using a given account id
+func (s *Storage) cacheAccIdToData(id string) (*Account, error) {
+	var target Account
+	found, err := s.cache.Get(cacheUserIdToAccPrefix+id, &target)
+	if !found {
+		if err != nil && !errors.Is(err, redis.Nil) {
+			return nil, err
+		} else {
+			return nil, errCacheNotFound
+		}
+	}
+	return &target, nil
+}