feat: solve day 8 part 1...twice

cmd/08/estimator/estimator.go

@@ -0,0 +1,57 @@
+// Package estimator provides model and methods
+// for answering questions about cable needs
+// for connecting junction boxes.
+package estimator
+
+import (
+	"slices"
+
+	"github.com/StevanFreeborn/advent-of-code-2025/cmd/08/box"
+	"github.com/StevanFreeborn/advent-of-code-2025/cmd/08/circuitMap"
+	"github.com/StevanFreeborn/advent-of-code-2025/cmd/08/connection"
+)
+
+type Estimator interface {
+	PossibleConnections() []connection.Connection
+	CreateMap() circuitMap.CircuitMap
+}
+
+type estimator struct {
+	possibleConnections []connection.Connection
+	boxes               []box.Box
+}
+
+func From(boxes []box.Box) Estimator {
+	return estimator{
+		boxes:               boxes,
+		possibleConnections: createAllPossibleConnections(boxes),
+	}
+}
+
+func (e estimator) PossibleConnections() []connection.Connection {
+	return e.possibleConnections
+}
+
+func (e estimator) CreateMap() circuitMap.CircuitMap {
+	return circuitMap.From(e.boxes)
+}
+
+func createAllPossibleConnections(boxes []box.Box) []connection.Connection {
+	connections := []connection.Connection{}
+	numOfBoxes := len(boxes)
+
+	for i := range numOfBoxes {
+		for j := i + 1; j < numOfBoxes; j++ {
+			start := boxes[i]
+			end := boxes[j]
+			conn := connection.From(start, end)
+			connections = append(connections, conn)
+		}
+	}
+
+	slices.SortFunc(connections, func(a connection.Connection, b connection.Connection) int {
+		return int(a.Distance() - b.Distance())
+	})
+
+	return connections
+}

cmd/08/estimator/estimator_test.go

@@ -0,0 +1,35 @@
+package estimator_test
+
+import (
+	"testing"
+
+	"github.com/StevanFreeborn/advent-of-code-2025/cmd/08/box"
+	"github.com/StevanFreeborn/advent-of-code-2025/cmd/08/estimator"
+)
+
+func TestFrom(t *testing.T) {
+	result := estimator.From([]box.Box{})
+
+	if result == nil {
+		t.Errorf("estimator.From returned nil; expected non-nil value")
+	}
+
+	if len(result.PossibleConnections()) != 0 {
+		t.Errorf("estimator.From returned estimator with PossibleConnections() = %d; expected 0", result.PossibleConnections())
+	}
+}
+
+func TestPossibleConnections(t *testing.T) {
+	expectedNumOfConnections := 1
+
+	est := estimator.From([]box.Box{
+		box.From("0,0,0"),
+		box.From("1,1,1"),
+	})
+
+	result := est.PossibleConnections()
+
+	if len(result) != expectedNumOfConnections {
+		t.Errorf("PossibleConnections() returned %d connections; expected %d", len(result), expectedNumOfConnections)
+	}
+}