COde updates

config/config.go

@@ -14,6 +14,7 @@ type Config struct {
 	TargetChatId               *int64  `yaml:"target_chat_id"`
 	EntryMessage               string  `yaml:"entry_message"`
 	ApprovalMessage            string  `yaml:"approval_message"`
+	SendApprovalMessage        bool    `yaml:"send_approval_message"`
 	DeleteRequestAfterDecision bool    `yaml:"delete_request_after_decision"`
 }
 
@@ -44,6 +45,7 @@ func (c *Config) CreateConfig() error {
 		TargetChatId:               Int64Ptr(0),
 		EntryMessage:               "You have requested to join the group, please write a brief message explaining why you want to join.",
 		ApprovalMessage:            "",
+		SendApprovalMessage:        false,
 		DeleteRequestAfterDecision: false,
 	}
 
@@ -52,6 +54,19 @@ func (c *Config) CreateConfig() error {
 	return err
 }
 
+// SaveConfig writes the current Config back to config.yaml, overwriting the file.
+func (c *Config) SaveConfig() error {
+	f, err := os.OpenFile("config.yaml", os.O_WRONLY|os.O_TRUNC, 0644)
+	if err != nil {
+		return err
+	}
+	defer f.Close()
+
+	encoder := yaml.NewEncoder(f)
+	err = encoder.Encode(c)
+	return err
+}
+
 // StringPtr returns a pointer to the given string.
 func StringPtr(s string) *string { return &s }