refactore to new project structure

sudoku/sudoku.go

@@ -0,0 +1,48 @@
+package sudoku
+
+import (
+	"errors"
+	"fmt"
+
+	"git.kleiax.de/homepage/board"
+	"git.kleiax.de/homepage/logic"
+)
+
+type Game struct {
+	field  *board.Field
+	solver logic.Solver
+}
+
+func New(parser board.Parser, solver logic.Solver, data []byte) (*Game, error) {
+	err := parser.Parse(data)
+	if err != nil {
+		return &Game{}, fmt.Errorf("can not create game: %w", err)
+	}
+	return &Game{solver: solver, field: parser.GetField(0)}, nil
+}
+
+func (g *Game) Solve() error {
+	g.solver.InitStragies(g.field)
+	for !g.isFinished() {
+		if !g.nextSolveStep() {
+			return errors.New("no strategy can solve the puzzle")
+		}
+	}
+	return nil
+}
+
+func (g *Game) nextSolveStep() bool {
+	return g.solver.Run(0)
+}
+
+func (g *Game) prevSolveStep() {
+	// far far in the future
+}
+
+func (g *Game) isFinished() bool {
+	return g.field.IsSolved()
+}
+
+func (g *Game) GetField() board.Field {
+	return *g.field
+}