day20, starting to read in data

with using tests as entry points for checking things

day20/pulsePropagation.go

@@ -0,0 +1,92 @@
+package day20
+
+import (
+	"fmt"
+	"log"
+	"regexp"
+	"strings"
+)
+
+func Run() int {
+	fmt.Println("hello from dya 20")
+
+	return 0
+}
+
+type PulseType int
+
+const (
+	HighPulse PulseType = iota
+	LowPulse
+)
+
+type Signal struct {
+	To, From string
+	PulseType PulseType
+}
+
+type Module interface {
+	receive(s Signal) []Signal
+}
+
+// Modules
+type FlipFlop struct {
+	Name string
+	OutputNames []string
+	InOn bool
+}
+
+func IsLineFlipFlop(line string) bool {
+	return strings.HasPrefix(line, "%")
+}
+
+func ParseFlipFlop(line string) (result FlipFlop) {
+	re := regexp.MustCompile(`%(?P<NAME>\D+) -> (?P<OUTPUTS>.+)`)
+	matches := re.FindStringSubmatch(line)
+
+	log.Printf("matching %s getting '%s' and '%s'\n", line, matches[1], matches[2])
+	result.Name = matches[1]
+	result.OutputNames = strings.Split(matches[2], ", ")
+
+	return
+}
+
+type Broadcast struct {
+	OutputNames []string
+}
+
+func isLineBroadcast(line string) bool {
+	return strings.HasPrefix(line, "broadcaster")
+}
+
+func ParseBroadcast(line string) (result Broadcast) {
+	re := regexp.MustCompile(`broadcaster -> (?P<OUTPUTS>.+)`)
+	matches := re.FindStringSubmatch(line)
+
+	result.OutputNames = strings.Split(matches[1], ", ")
+	return
+}
+
+type Conjunction struct {
+	Name string
+	OutputNames []string
+	MostRecentPulseFromInputIsHigh map[string]bool
+}
+
+func isLineConjunction(line string) bool {
+	return strings.HasPrefix(line, "&")
+}
+
+func ParseConjunction(line string) (result Conjunction) {
+	re := regexp.MustCompile(`&(?P<NAME>\D+) -> (?P<OUTPUTS>.+)`)
+	matches := re.FindStringSubmatch(line)
+
+	log.Printf("matching %s getting '%s' and '%s'\n", line, matches[1], matches[2])
+	result.Name = matches[1]
+	result.OutputNames = strings.Split(matches[2], ", ")
+
+	return
+}
+
+type Button struct {}
+// process sends single `low pulse` directly to "broadcast"