feat: approve button

defs/callback.go

@@ -0,0 +1,39 @@
+package defs
+
+import "encoding/json"
+
+type Command struct {
+	Command string `json:"Command"`
+	Argstr  string `json:"Argstr"`
+}
+
+func (c *Command) ToJSON() string {
+	ans, _ := json.Marshal(c)
+	return string(ans)
+}
+
+const (
+	CMD_UNKNOWN = "unknown"
+	CMD_APPROVE = "approve"
+	CMD_REJECT  = "reject"
+)
+
+func NewApproveCommand(mcName string) *Command {
+	return &Command{
+		Command: CMD_APPROVE,
+		Argstr:  mcName,
+	}
+}
+
+func NewRejectCommand(mcName string) *Command {
+	return &Command{
+		Command: CMD_REJECT,
+		Argstr:  mcName,
+	}
+}
+
+func NewCommandFromJSON(jsonStr string) (*Command, error) {
+	var cmd Command
+	err := json.Unmarshal([]byte(jsonStr), &cmd)
+	return &cmd, err
+}