Added framework for alarms, code cleanup

alarm/alarm.go

@@ -0,0 +1,19 @@
+package alarm
+
+import (
+	"fmt"
+)
+
+type Alarm interface {
+	Parse(string) (bool, error)
+	Alarm() error
+}
+
+func NewAlarm(name string, typename string) (Alarm, error) {
+	switch typename {
+	case "email":
+		return NewAlarmEmail(name), nil
+	default:
+		return nil, fmt.Errorf("unknown alarm name \"%s\"", name)
+	}
+}

alarm/alarm_email.go

@@ -0,0 +1,66 @@
+package alarm
+
+import (
+	"fmt"
+	"strings"
+)
+
+const (
+	TK_NONE = iota
+  TK_TO
+  TK_SMTP
+  TK_FROM
+)
+
+
+type AlarmEmail struct {
+	Type  string
+	Name  string
+	From  string
+	SMTP  string
+	To    []string
+	state int
+}
+
+func NewAlarmEmail(name string) *AlarmEmail {
+	return &AlarmEmail{
+		Type: "email", Name: name,
+	}
+}
+
+func (a *AlarmEmail) Alarm() error {
+	fmt.Printf("email alarm")
+	return nil
+}
+
+func (a *AlarmEmail) Parse(tk string) (bool, error) {
+	switch a.state {
+		case TK_NONE:
+			switch strings.ToLower(tk){
+				case "to":
+					a.state = TK_TO
+				case "from":
+					a.state = TK_FROM
+				case "smtp":
+					a.state = TK_SMTP
+				default:
+					return false, nil
+			}
+
+		case TK_FROM:
+			a.From = tk
+			a.state = TK_NONE
+
+		case TK_SMTP:
+			a.SMTP = tk
+			a.state = TK_NONE
+
+		case TK_TO:
+			a.To = append(a.To, tk)
+			a.state = TK_NONE
+
+		default:
+			return false, fmt.Errorf("invalid state in alarm_email")
+	}
+	return true, nil
+}