112 lines
2.2 KiB
Go
112 lines
2.2 KiB
Go
package graphvent
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import (
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"encoding/json"
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)
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type SignalDirection int
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const (
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Up SignalDirection = iota
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Down
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Direct
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)
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type SignalType string
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type Signal interface {
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Serializable[SignalType]
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Direction() SignalDirection
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}
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type BaseSignal struct {
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SignalDirection SignalDirection `json:"direction"`
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SignalType SignalType `json:"type"`
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}
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func (signal BaseSignal) Type() SignalType {
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return signal.SignalType
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}
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func (signal BaseSignal) Direction() SignalDirection {
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return signal.SignalDirection
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}
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func (signal BaseSignal) Serialize() ([]byte, error) {
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return json.MarshalIndent(signal, "", " ")
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}
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func NewBaseSignal(signal_type SignalType, direction SignalDirection) BaseSignal {
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signal := BaseSignal{
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SignalDirection: direction,
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SignalType: signal_type,
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}
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return signal
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}
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func NewDownSignal(signal_type SignalType) BaseSignal {
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return NewBaseSignal(signal_type, Down)
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}
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func NewUpSignal(signal_type SignalType) BaseSignal {
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return NewBaseSignal(signal_type, Up)
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}
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func NewDirectSignal(signal_type SignalType) BaseSignal {
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return NewBaseSignal(signal_type, Direct)
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}
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const StopSignalType = SignalType("STOP")
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var StopSignal = NewDownSignal(StopSignalType)
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type IDSignal struct {
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BaseSignal
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ID NodeID `json:"id"`
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}
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func (signal IDSignal) String() string {
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ser, err := json.Marshal(signal)
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if err != nil {
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return "STATE_SER_ERR"
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}
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return string(ser)
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}
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func NewIDSignal(signal_type SignalType, direction SignalDirection, id NodeID) IDSignal {
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return IDSignal{
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BaseSignal: NewBaseSignal(signal_type, direction),
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ID: id,
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}
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}
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type StatusSignal struct {
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IDSignal
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Status string `json:"status"`
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}
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func (signal StatusSignal) String() string {
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ser, err := json.Marshal(signal)
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if err != nil {
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return "STATE_SER_ERR"
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}
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return string(ser)
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}
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func NewStatusSignal(status string, source NodeID) StatusSignal {
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return StatusSignal{
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IDSignal: NewIDSignal("status", Up, source),
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Status: status,
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}
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}
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type StartChildSignal struct {
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IDSignal
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Action string `json:"action"`
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}
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func NewStartChildSignal(child_id NodeID, action string) StartChildSignal {
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return StartChildSignal{
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IDSignal: NewIDSignal("start_child", Direct, child_id),
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Action: action,
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}
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}
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