redis

redis/redis_prefix.go

@@ -0,0 +1,45 @@
+package redis
+
+import (
+	"strings"
+
+	"github.com/charlienet/go-mixed/expr"
+)
+
+const (
+	defaultSeparator = ":"
+)
+
+type redisPrefix struct {
+	prefix    string
+	separator string
+}
+
+func newPrefix(separator string, prefix ...string) redisPrefix {
+	s := expr.Ternary(len(separator) == 0, defaultSeparator, separator)
+
+	return redisPrefix{
+		separator: s,
+		prefix:    expr.Ternary(len(prefix) > 0, strings.Join(prefix, separator), ""),
+	}
+}
+
+func (p *redisPrefix) Prefix() string {
+	return p.prefix
+}
+
+func (p *redisPrefix) Separator() string {
+	return p.separator
+}
+
+func (p *redisPrefix) hasPrefix() bool {
+	return len(p.prefix) > 0
+}
+
+func (p *redisPrefix) join(key ...string) string {
+	s := make([]string, 0, len(key)+1)
+	s = append(s, p.prefix)
+	s = append(s, key...)
+
+	return strings.Join(s, p.separator)
+}