feat: solve day 1 part 1

cmd/01/dial/dial.go

@@ -0,0 +1,48 @@
+// Package dial provides a model for representing a dial
+package dial
+
+import (
+	"github.com/StevanFreeborn/advent-of-code-2025/cmd/01/direction"
+	"github.com/StevanFreeborn/advent-of-code-2025/cmd/01/instruction"
+)
+
+type Dial interface {
+	Value() int
+	Turn(instruction instruction.Instruction)
+}
+
+type dial struct {
+	value int
+}
+
+func New() Dial {
+	return &dial{
+		value: 50,
+	}
+}
+
+func (d *dial) Value() int {
+	return d.value
+}
+
+func (d *dial) Turn(instruction instruction.Instruction) {
+	if instruction.Direction() == direction.Left {
+		d.value -= instruction.Distance()
+
+		for d.value < 0 {
+			d.value += 100
+		}
+
+		return
+	}
+
+	if instruction.Direction() == direction.Right {
+		d.value += instruction.Distance()
+
+		for d.value > 99 {
+			d.value -= 100
+		}
+
+		return
+	}
+}