Initial commit

board/parser.go

@@ -0,0 +1,97 @@
+package board
+
+import (
+	"bytes"
+	"errors"
+	"fmt"
+	"strconv"
+)
+
+type Parser interface {
+	parse(data []byte) error
+	getField(i int) *Field
+	getAllFields() []Field
+}
+
+type parserHelper struct {
+	fields []Field
+}
+
+func (ph *parserHelper) getField(i int) *Field {
+	if i < 0 || i >= len(ph.fields) {
+		return &Field{}
+	}
+	return &ph.fields[i]
+}
+
+func (ph *parserHelper) getAllFields() []Field {
+	if len(ph.fields) == 0 {
+		return nil
+	}
+	return ph.fields
+}
+
+// https://github.com/grantm/sudoku-exchange-puzzle-bank/tree/master
+type PuzzleBank struct {
+	parserHelper
+}
+
+func (pb *PuzzleBank) parse(data []byte) error {
+
+	lines := bytes.Split(data, []byte("\n"))
+	for _, line := range lines {
+		if len(line) == 0 { // Überspringe leere Zeile
+			continue
+		}
+
+		if len(line) != 99 {
+			return fmt.Errorf("Zeile hat die falsche länge. soll: 100, ist: %d", len(line))
+		}
+
+		//siehe Readme in github repo
+		sha1Hash := bytes.TrimSpace(line[0:12])
+		sudokuStr := string(line[13:94])
+		ratingStr := string(line[96:99])
+		//fmt.Println(sudokuStr)
+
+		var rating float64
+		_, err := fmt.Sscanf(ratingStr, "%f", &rating)
+		if err != nil {
+			return errors.New("can nor parse raiting")
+		}
+
+		field := Field{
+			rows:            9,
+			columns:         9,
+			blockRows:       3,
+			blockColumns:    3,
+			blockSizeRow:    3,
+			blockSizeColumn: 3,
+			rating:          rating,
+			sha1:            sha1Hash,
+		}
+
+		field.cells = make([][]Cell, field.rows)
+		for i := range field.cells {
+			field.cells[i] = make([]Cell, field.columns)
+			for j := range field.cells[i] {
+				number, err := strconv.Atoi(string(sudokuStr[i*9+j]))
+				if err != nil {
+					return fmt.Errorf("Kann Zeichen nicht in Zahl konvertieren")
+				}
+				field.cells[i][j].number = number
+				field.cells[i][j].Pos = &Position{
+					row:           i,
+					column:        j,
+					blockRow:      i / field.blockRows,
+					blockColumn:   j / field.blockColumns,
+					inBlockRow:    i % field.blockSizeRow,
+					inBlockColumn: j % field.blockSizeColumn,
+				}
+			}
+		}
+		//fmt.Println(field.String())
+		pb.fields = append(pb.fields, field)
+	}
+	return nil
+}