feat: wip on adding grid

internal/grid/grid.go

@@ -0,0 +1,104 @@
+package grid
+
+type Grid interface {
+	Positions() map[Position]string
+	Walk()
+}
+
+type grid struct {
+	positions map[Position]string
+}
+
+func NewGrid(input []string) Grid {
+	numberOfRows := len(input)
+	numberOfColumns := len(input[0])
+	positions := map[Position]string{}
+
+	for row := range numberOfRows {
+		for column := range numberOfColumns {
+			value := string(input[row][column])
+			pos := NewPosition(row, column)
+			positions[pos] = value
+		}
+	}
+
+	return grid{
+		positions: positions,
+	}
+}
+
+func (g grid) Positions() map[Position]string {
+	positions := map[Position]string{}
+
+	for key, value := range g.positions {
+		newPosition := NewPosition(key.Row(), key.Column())
+		positions[newPosition] = value
+	}
+
+	return positions
+}
+
+type Position interface {
+	Column() int
+	Row() int
+}
+
+type position struct {
+	column int
+	row    int
+}
+
+func NewPosition(row int, column int) Position {
+	return position{
+		row:    row,
+		column: column,
+	}
+}
+
+func (p position) Row() int {
+	return p.row
+}
+
+func (p position) Column() int {
+	return p.column
+}
+
+type Move interface {
+	NumberOfRows() int
+	NumberOfColumns() int
+}
+
+type move struct {
+	numberOfRows    int
+	numberOfColumns int
+}
+
+func (m move) NumberOfRows() int {
+	return m.numberOfColumns
+}
+
+func (m move) NumberOfColumns() int {
+	return m.numberOfColumns
+}
+
+var (
+	Up        = move{numberOfRows: -1, numberOfColumns: 0}
+	Down      = move{numberOfRows: 1, numberOfColumns: 0}
+	Right     = move{numberOfRows: 0, numberOfColumns: 1}
+	Left      = move{numberOfRows: 0, numberOfColumns: -1}
+	UpRight   = move{numberOfRows: -1, numberOfColumns: 1}
+	UpLeft    = move{numberOfRows: -1, numberOfColumns: -1}
+	DownRight = move{numberOfRows: 1, numberOfColumns: 1}
+	DownLeft  = move{numberOfRows: 1, numberOfColumns: -1}
+)
+
+var AllMoves = []Move{
+	Up,
+	Down,
+	Right,
+	Left,
+	UpRight,
+	UpLeft,
+	DownRight,
+	DownLeft,
+}

internal/grid/grid.txt

@@ -0,0 +1,10 @@
+..........
+..........
+..........
+..........
+..........
+..........
+..........
+..........
+..........
+..........

internal/grid/grid_test.go

@@ -0,0 +1 @@
+package grid_test