aoc2024/day-06/internal/two/graph.go

package two

import (
	"strings"
)

type graph struct {
	startPoint point
	data       []string
}

func newGraph(startPoint point, data []string) *graph {
	return &graph{startPoint: startPoint, data: data}
}

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

func (g *graph) valueAt(x, y int) rune {
	return rune(g.data[y][x])
}

func (g *graph) trace(visited map[point]struct{}) string {
	for loc := range visited {
		if !(rune(g.data[loc.y][loc.x]) == 'O') {
			g.data[loc.y] = replaceAtIndex(g.data[loc.y], '+', loc.x)
		}
	}

	return g.String()
}