day20: more reading

day20/pulsePropagation.go

@@ -3,7 +3,7 @@ package day20
 import (
 	"fmt"
 	"log"
-	"regexp"
+	"os"
 	"strings"
 )
 
@@ -12,81 +12,37 @@ func Run() int {
 
 	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"
+
+func ReadModules(filename string) map[string]Module {
+	result := make(map[string]Module)
+	bytes, err := os.ReadFile(filename)
+	if err != nil {
+		panic(fmt.Sprint("error reading file: ", filename))
+	}
+
+	text := strings.TrimSpace(string(bytes))
+
+	for _, line := range strings.Split(text, "\n") {
+		switch {
+		case IsLineBroadcast(line):
+			parsed := ParseBroadcast(line)
+			result["broadcast"] = &parsed
+		case IsLineFlipFlop(line):
+			parsed := ParseFlipFlop(line)
+			result[parsed.Name] = &parsed
+		case IsLineConjunction(line):
+			parsed := ParseConjunction(line)
+			result[parsed.Name] = &parsed
+		}
+
+		log.Println(line)
+	}
+
+	buttonModule := Button{}
+	result["button"] = &buttonModule
+	outputModule := Output{}
+	result["output"] = &outputModule
+
+	return result
+}