day20, modules state comparations

day20/modules.go

@@ -27,6 +27,7 @@ type Signal struct {
 type Module interface {
 	Receive(s Signal) []Signal
 	Outputs() []string
+	StateSnapshot() string
 }
 
 // Modules
@@ -71,6 +72,10 @@ func (ff *FlipFlop)String() string {
 	return fmt.Sprintf("[flip-flop '%s' (on: %t) -> %s]", ff.Name, ff.IsOn, ff.OutputNames)
 }
 
+func (ff *FlipFlop)StateSnapshot() string {
+	return ff.String()
+}
+
 func IsLineFlipFlop(line string) bool {
 	return strings.HasPrefix(line, "%")
 }
@@ -108,6 +113,9 @@ func (b *Broadcast)Outputs() []string {
 func (b *Broadcast)String() string {
 	return fmt.Sprintf("[broadcast -> %+v]", b.OutputNames)
 }
+func (b *Broadcast)StateSnapshot() string {
+	return b.String()
+}
 
 func IsLineBroadcast(line string) bool {
 	return strings.HasPrefix(line, "broadcaster")
@@ -174,6 +182,10 @@ func (c *Conjunction)String() string {
 	return fmt.Sprintf("[conjunction '%s' -> %+v]", c.Name, c.OutputNames)
 }
 
+func (c *Conjunction)StateSnapshot() string {
+	return fmt.Sprintf("[conjunction '%s' -> %+v]", c.Name, c.MostRecentPulseFromInputIsHigh)
+}
+
 func IsLineConjunction(line string) bool {
 	return strings.HasPrefix(line, "&")
 }
@@ -207,6 +219,10 @@ func (b *Button)String() string {
 	return "[button]"
 }
 
+func (b *Button)StateSnapshot() string {
+	return b.String()
+}
+
 type Output struct {}
 
 func (o *Output)Receive(s Signal) []Signal {
@@ -221,3 +237,7 @@ func (o *Output)Outputs() []string {
 func (o *Output)String() string {
 	return "[output]"
 }
+
+func (o *Output)StateSnapshot() string {
+	return o.String()
+}