Refactor Sudoku solver architecture

parser/puzzleBank.go

@@ -0,0 +1,74 @@
+package parser
+
+import (
+	"bytes"
+	"errors"
+	"fmt"
+	"strconv"
+
+	"git.kleiax.de/homepage/field"
+)
+
+// 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]) // Wird aktuell nicht gebraucht, später zum sudoku vergleichen
+		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")
+		}
+
+		props := field.Properties{
+			Rows:            9,
+			Columns:         9,
+			BlockRows:       3,
+			BlockColumns:    3,
+			BlockSizeRow:    3,
+			BlockSizeColumn: 3,
+			Rating:          rating,
+		}
+
+		cells := make([][]field.Cell, props.Rows)
+		for i := range cells {
+			cells[i] = make([]field.Cell, props.Columns)
+			for j := range cells[i] {
+				number, err := strconv.Atoi(string(sudokuStr[i*9+j]))
+				if err != nil {
+					return fmt.Errorf("Kann Zeichen nicht in Zahl konvertieren")
+				}
+				pos := field.NewPosition(
+					i,
+					j,
+					i/props.BlockRows,
+					j/props.BlockColumns,
+					i%props.BlockRows,
+					j%props.BlockColumns)
+
+				cells[i][j] = *field.NewCell(number, pos)
+			}
+		}
+		pb.fields = append(pb.fields, *field.New(props, cells))
+	}
+
+	return nil
+}