almost done

slownie.go

@@ -1,7 +1,16 @@
-package slownie
+package main
+
+import (
+	"errors"
+	"fmt"
+	"math"
+	"math/rand"
+	"strings"
+	"time"
+)
 
 var _smallNumbers = []string{
-	"jeden", "dwa", "trzy", "cztery", "pięć", "sześć", "siedem",
+	"zero", "jeden", "dwa", "trzy", "cztery", "pięć", "sześć", "siedem",
 	"osiem", "dziewięć", "dziesięć", "jedenaście", "dwanaście",
 	"trzynaście", "czternaście", "piętnaście", "szesnaście",
 	"siedemnaście", "osiemnaście", "dziewiętnaście"}
@@ -12,27 +21,131 @@ var _tens = []string{
 	"osiemdziesiąt", "dziewięćdziesiąt"}
 
 var _hundrets = []string{
-	"sto", "dwieście", "trzysta", "czterysta",
+	"", "sto", "dwieście", "trzysta", "czterysta",
 	"pięćset", "sześćset", "siedemset", "osiemset",
 	"dziewięćset"}
 
-var _thousand = []string{"tysiąc", "tysiące", "tysięcy"}
-
-var _million = []string{"milion", "miliony", "milionów"}
-
-func numberToText(input int) string {
-
+var _bigones = [][]string{
+	{"", "", ""},
+	{"tysiąc", "tysiące", "tysięcy"},
+	{"milion", "miliony", "milionów"},
+	{"miliard", "miliardy", "miliardów"},
+	{"bilion", "biliony", "bilionów"},
 }
 
-func Slownie(input float32) string {
-	var output string = ""
-	zloty := int(input)
-	groszy := int((input - float32(int(input))) * 100)
+var _zlotyWord = []string{"złoty", "złote", "złotych"}
 
-	if zloty == 0 {
-		output += "zero"
-		goto calc_groszy
+var _groszyWord = []string{"grosz", "grosze", "groszy"}
+
+func split(value float64) (int64, int32) {
+	pre := int64(value)
+	post := int32(math.Mod((value*100 + 0.5), 100))
+	return pre, post
+}
+
+func caseWord(value int) int32 {
+	single := value % 10
+	tens := (value / 10) % 10
+	var caseWord int32
+	if value == 1 {
+		caseWord = 0
+	} else if tens == 1 && single > 1 {
+		caseWord = 2
+	} else if 2 <= single && single <= 4 {
+		caseWord = 1
+	} else {
+		caseWord = 2
+	}
+	return caseWord
+}
+
+func threeNumberWord(value int32) string {
+	single := value % 10
+	tens := (value / 10) % 10
+	hundrets := (value / 100) % 10
+
+	var words []string
+	if hundrets > 0 {
+		words = append(words, _hundrets[hundrets])
+	}
+	if tens == 1 {
+		words = append(words, _smallNumbers[single+10])
+	} else {
+		if tens > 0 {
+			words = append(words, _tens[tens])
+		}
+		if single > 0 {
+			words = append(words, _smallNumbers[single])
+		}
+	}
+	return strings.Join(words, " ")
+}
+
+func slownie(value int64) string {
+	var threePairs []int32
+	if value == 0 {
+		return "zero"
+	}
+	for value > 0 {
+		threePairs = append(threePairs, int32(value%1000))
+		value = value / 1000
 	}
 
-calc_groszy:
+	var words []string
+
+	for i, n := range threePairs {
+		if n > 0 {
+			if i > 0 {
+				words = append(words, threeNumberWord(n)+" "+_bigones[i][caseWord(int(n))])
+			} else {
+				words = append(words, threeNumberWord(n))
+			}
+		}
+	}
+
+	//reverse
+	for i := len(words)/2 - 1; i >= 0; i-- {
+		opp := len(words) - 1 - i
+		words[i], words[opp] = words[opp], words[i]
+	}
+
+	return strings.Join(words, " ")
+}
+
+func someSlownie(value int64, some []string) string {
+	return slownie(value) + " " + some[caseWord(int(value))]
+}
+
+func kwotaSlownie(input float64) (output string, err error) {
+	defer func() {
+		if r := recover(); r != nil {
+			err = errors.New("too big number")
+		}
+	}()
+	var minusword = ""
+	if input < 0 {
+		minusword = "minus "
+		input = -input
+	}
+	zloty, grosze := split(input)
+	return minusword + someSlownie(zloty, _zlotyWord) + fmt.Sprintf(" %d/100", grosze), nil
+}
+
+func main() {
+	r := rand.New(rand.NewSource(time.Now().UnixNano()))
+
+	for i := 0; i < 10; i++ {
+		x := r.Float64() * 10000000000000000
+		if kwota, err := kwotaSlownie(x); err == nil {
+			fmt.Printf("%.2f %s\n", x, kwota)
+		} else {
+			fmt.Printf("%.2f %s\n", x, err)
+		}
+	}
+	x := 4831179.50
+	if kwota, err := kwotaSlownie(x); err == nil {
+		fmt.Printf("%.2f %s\n", x, kwota)
+	} else {
+		fmt.Printf("%.2f %s\n", x, err)
+	}
 }