1 files changed, 70 insertions, 0 deletions
diff --git a/server/utils.go b/server/utils.go
new file mode 100644
index 0000000..cd2069f
--- /dev/null
+++ b/server/utils.go
@@ -0,0 +1,70 @@
+package main
+
+import (
+	"encoding/json"
+	"net"
+)
+
+const (
+	MESSAGE      = "message"
+	AUTHENTICATE = "authenticate"
+	RENAME       = "rename"
+)
+
+const (
+	SUCCESS = "success"
+	FAILURE = "failure"
+)
+
+type Message struct {
+	Type string
+	Data string
+	User string
+}
+
+func (msg *Message) serialize() string {
+	data, _ := json.Marshal(msg)
+	return string(data)
+}
+
+type Response struct {
+	Status string
+	Data   string
+}
+
+func toBytes(num uint32) []byte {
+	buf := make([]byte, 4)
+	var mask uint32 = 0x00FF
+	for i := 0; i < 4; i += 1 {
+		buf[4-i-1] = byte(num & mask)
+		num >>= 8
+	}
+	return buf
+}
+
+func fromBytes(data []byte) uint32 {
+	var num uint32
+	for i := 0; i < 4; i += 1 {
+		num += uint32(data[i] << ((4 - i - 1) * 8))
+	}
+	return num
+}
+
+func sendMessage(conn net.Conn, message []byte) error {
+	size := uint32(len(message))
+
+	data := append(toBytes(size), message...)
+	_, err := conn.Write(data)
+	if err != nil {
+		return err
+	}
+
+	return nil
+}
+
+func parseMessage(data []byte) Message {
+	var m Message
+	// TODO(andrew): Добавить обработку ошибок
+	json.Unmarshal(data, &m)
+	return m
+}