aoc2024/day-08/internal/one/graph.go

package one

import (
	"strings"
)

type graph struct {
	data      []string
	antennae  []antenna
	antinodes map[coords]struct{}
}

func newGraph() *graph {
	return &graph{antinodes: make(map[coords]struct{})}
}

func (g *graph) String() string {
	return strings.Join(g.data, "\n")
}

func (g *graph) isOutOfBounds(c coords) bool {
	return c.x < 0 || c.y < 0 || c.y >= len(g.data) || c.x >= len(g.data[0])
}

func (g *graph) debug() string {
	for _, antenna := range g.antennae {
		g.data[antenna.y] = replaceAtIndex(g.data[antenna.y], antenna.identifier, antenna.x)
	}
	for antinode := range g.antinodes {
		g.data[antinode.y] = replaceAtIndex(g.data[antinode.y], '#', antinode.x)
	}

	return g.String()
}