74 lines
1.3 KiB
Go
74 lines
1.3 KiB
Go
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package board
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import (
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"fmt"
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"strings"
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)
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// MoveProp is defined as
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// <piece><disambiguity><captures><square><promote><check|mate>
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type MoveProp uint16
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// Available MoveProps
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const (
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QueenSideCastle MoveProp = 1 << iota
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KingSideCastle
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Capture
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EnPassant
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Check
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Mate
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inCheck
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)
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// Move is defined as
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type Move struct {
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Piece PieceType
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FromRank *Rank
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FromFile *File
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To Square
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PromoteTo PieceType
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Props MoveProp
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}
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func (m Move) String() string {
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out := ""
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if m.HasProp(KingSideCastle) {
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out += "O-O"
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} else if m.HasProp(QueenSideCastle) {
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out += "O-O-O"
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} else {
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if m.Piece != NoPieceType && m.Piece != Pawn {
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out += strings.ToUpper(m.Piece.String())
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}
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if m.FromFile != nil {
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out += m.FromFile.String()
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}
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if m.FromRank != nil {
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out += m.FromRank.String()
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}
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if m.HasProp(Capture) {
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out += "x"
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}
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out += m.To.String()
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if m.PromoteTo != NoPieceType {
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out += fmt.Sprintf("=%s", m.PromoteTo.String())
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}
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}
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if m.HasProp(Check) {
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out += "+"
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} else if m.HasProp(Mate) {
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out += "#"
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}
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return out
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}
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// AddProp adds the given MoveProp to this move.
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func (m *Move) AddProp(prop MoveProp) {
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m.Props = m.Props | prop
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}
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// HasProp returns true if this move has the given MoveProp.
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func (m Move) HasProp(prop MoveProp) bool {
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return m.Props&prop > 0
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}
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