1 files changed, 72 insertions, 0 deletions
diff --git a/common/infostring/infostring.go b/common/infostring/infostring.go
new file mode 100644
index 0000000..114058a
--- /dev/null
+++ b/common/infostring/infostring.go
@@ -0,0 +1,72 @@
+package infostring
+
+import (
+	"strings"
+
+	"github.com/osm/quake/common/buffer"
+)
+
+type InfoString struct {
+	Info []Info
+}
+
+type Info struct {
+	Key   string
+	Value string
+}
+
+func New(opts ...Option) *InfoString {
+	var infoString InfoString
+
+	for _, opt := range opts {
+		opt(&infoString)
+	}
+
+	return &infoString
+}
+
+func (is *InfoString) Bytes() []byte {
+	buf := buffer.New()
+
+	buf.PutByte(byte('"'))
+
+	for i := 0; i < len(is.Info); i++ {
+		buf.PutBytes([]byte("\\" + is.Info[i].Key))
+		buf.PutBytes([]byte("\\" + is.Info[i].Value))
+	}
+
+	buf.PutByte(byte('"'))
+
+	return buf.Bytes()
+}
+
+func Parse(input string) *InfoString {
+	var ret InfoString
+
+	trimmed := strings.Trim(input, "\"")
+	parts := strings.Split(trimmed, "\\")
+
+	for i := 1; i < len(parts)-1; i += 2 {
+		ret.Info = append(ret.Info, Info{parts[i], parts[i+1]})
+	}
+
+	return &ret
+}
+
+func (is *InfoString) Get(key string) string {
+	for i := 0; i < len(is.Info); i++ {
+		if is.Info[i].Key == key {
+			return is.Info[i].Value
+		}
+	}
+
+	return ""
+}
+
+func (is *InfoString) Set(key, value string) {
+	for i := 0; i < len(is.Info); i++ {
+		if is.Info[i].Key == key {
+			is.Info[i].Value = value
+		}
+	}
+}