Maintain history; use state

state/cursor.go

@@ -3,47 +3,55 @@ package state
 func (s *State) CursorCellUp() {
 	if s.cursor.Y >= 1 {
 		s.cursor.Y--
+		s.history += "u"
 	}
 }
 
 func (s *State) CursorCellDown() {
 	if s.cursor.Y < s.size()-1 {
 		s.cursor.Y++
+		s.history += "d"
 	}
 }
 
 func (s *State) CursorCellRight() {
 	if s.cursor.X < s.size()-1 {
 		s.cursor.X++
+		s.history += "r"
 	}
 }
 
 func (s *State) CursorCellLeft() {
 	if s.cursor.X >= 1 {
 		s.cursor.X--
+		s.history += "l"
 	}
 }
 
 func (s *State) CursorSectionUp() {
 	if s.cursor.Y >= s.cellsPerSection {
 		s.cursor.Y -= s.cellsPerSection
+		s.history += "U"
 	}
 }
 
 func (s *State) CursorSectionDown() {
 	if s.cursor.Y < s.size()-s.cellsPerSection {
 		s.cursor.Y += s.cellsPerSection
+		s.history += "D"
 	}
 }
 
 func (s *State) CursorSectionRight() {
 	if s.cursor.X < s.size()-s.cellsPerSection {
 		s.cursor.X += s.cellsPerSection
+		s.history += "R"
 	}
 }
 
 func (s *State) CursorSectionLeft() {
 	if s.cursor.X >= s.cellsPerSection {
 		s.cursor.X -= s.cellsPerSection
+		s.history += "L"
 	}
 }

state/field.go

@@ -38,6 +38,11 @@ func (f *field) String() string {
 	return string(f.cells)
 }
 
+// cell returns the raw cell (a byte) at the given point.
+func (f *field) cell(p Point) cell {
+	return f.cells[f.i(p)]
+}
+
 // state returns whether or not the cell is alive.
 func (f *field) state(p Point) bool {
 	return f.cells[f.i(p)].state()

state/state.go

@@ -2,6 +2,7 @@ package state
 
 import (
 	"bytes"
+	"fmt"
 	"math/rand"
 )
 
@@ -9,9 +10,18 @@ type Point struct {
 	X, Y int
 }
 
+func (p Point) String() string {
+	return fmt.Sprintf("(%d,%d)", p.X, p.Y)
+}
+
 type State struct {
 	cursor *Point
 
+	clears, score, factor int
+	blackout              []bool
+
+	history string
+
 	sectionSize, cellsPerSection int
 	cells, sections              *field
 }
@@ -24,11 +34,13 @@ func New(sectionSize, cellsPerSection int) *State {
 		sections:        newField(sectionSize),
 		cursor:          &Point{0, 0},
 	}
+	s.history = fmt.Sprintf("gogogogogram %d %d:\n", sectionSize, cellsPerSection)
 	for x := 0; x < sectionSize; x++ {
 		for y := 0; y < sectionSize; y++ {
 			s.initSection(Point{x, y})
 		}
 	}
+	// TODO reveal 1 row per section, 1 col per sections/2
 	return s
 }
 
@@ -37,6 +49,11 @@ func (s *State) size() int {
 	return s.sectionSize * s.cellsPerSection
 }
 
+// History returns the gameplay history for replays
+func (s *State) History() string {
+	return s.history
+}
+
 func (s *State) String() string {
 	var buf bytes.Buffer
 	for x := 0; x < s.sectionSize*s.cellsPerSection; x++ {
@@ -68,14 +85,17 @@ func (s *State) String() string {
 }
 
 func (s *State) Mark() []bool {
+	s.history += "m"
 	return s.mark(*s.cursor)
 }
 
 func (s *State) Flag() []bool {
+	s.history += "f"
 	return s.flag(*s.cursor)
 }
 
 func (s *State) Clear() {
+	s.history += "c"
 	s.clear(*s.cursor, true)
 }
 
@@ -83,17 +103,20 @@ func (s *State) view(cursor []int) {
 }
 
 func (s *State) initSection(p Point) {
+	s.history += fmt.Sprintf("i%s", p)
 	s.sections.clear(p, false)
 	startX := p.X * s.cellsPerSection
 	startY := p.Y * s.cellsPerSection
 	for x := 0; x < s.cellsPerSection; x++ {
 		for y := 0; y < s.cellsPerSection; y++ {
-			s.cells.clear(Point{x + startX, y + startY}, true)
+			currPoint := Point{x + startX, y + startY}
+			s.cells.clear(currPoint, true)
 			if rand.Int()%2 == 0 {
-				s.cells.kill(Point{x + startX, y + startY})
+				s.cells.kill(currPoint)
 			} else {
-				s.cells.vivify(Point{x + startX, y + startY})
+				s.cells.vivify(currPoint)
 			}
+			s.history += fmt.Sprintf("%c", byte(s.cells.cell(currPoint)))
 		}
 	}
 	s.update(p)

state/state_test.go

@@ -1,6 +1,7 @@
 package state
 
 import (
+	"regexp"
 	"testing"
 
 	. "github.com/smartystreets/goconvey/convey"
@@ -48,6 +49,24 @@ func TestState(t *testing.T) {
 			})
 		})
 
+		Convey("You can maintain a history of all actions", func() {
+			s.Flag()
+			s.Mark()
+			s.Clear()
+			s.CursorSectionRight()
+			s.CursorSectionLeft()
+			s.CursorSectionDown()
+			s.CursorSectionUp()
+			s.CursorCellRight()
+			s.CursorCellLeft()
+			s.CursorCellDown()
+			s.CursorCellUp()
+
+			matches, err := regexp.Match("gogogogogram 2 2:\n(i\\(\\d,\\d\\)[\b\x01]{4}){4}fmcRLDUrldu", []byte(s.History()))
+			So(matches, ShouldBeTrue)
+			So(err, ShouldBeNil)
+		})
+
 		Convey("You can complete sections and clear portions of the board", func() {
 			s.cells.vivify(Point{0, 0})
 			s.cells.vivify(Point{2, 0})