Initial cloud-services repo - gateway service + pkg modules

pkg/redis/set.go

@@ -0,0 +1,25 @@
+package redis
+
+// Set represents a set object using a map of empty structs
+type Set map[string]void
+type void struct{}
+
+var member void
+
+// Add id to the set, returns false if id exists
+func (s Set) Add(id string) bool {
+	if _, ok := s[id]; ok {
+		return false
+	}
+	s[id] = member
+	return true
+}
+
+// Remove id from the set, return false if id doesn't exist
+func (s Set) Remove(id string) bool {
+	if _, ok := s[id]; !ok {
+		return false
+	}
+	delete(s, id)
+	return true
+}