merge all branch and change project structure

internal/utils/id.go

@@ -0,0 +1,28 @@
+package utils
+
+import (
+	"github.com/bwmarrin/snowflake"
+)
+
+func init() {
+	var err error
+	idGenerator, err = snowflake.NewNode(getNodeNum())
+	if err != nil {
+		panic(err)
+	}
+}
+
+func getNodeNum() int64 {
+	return 1
+}
+
+var idGenerator *snowflake.Node
+
+func GenID() string {
+	return idGenerator.Generate().String()
+}
+
+func GenIDs(count int) []string {
+	//impl
+	return []string{}
+}