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