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package funcs
import (
"context"
"fmt"
"strconv"
"unicode/utf8"
"github.com/hairyhenderson/gomplate/v4/conv"
iconv "github.com/hairyhenderson/gomplate/v4/internal/conv"
"github.com/hairyhenderson/gomplate/v4/random"
)
// CreateRandomFuncs -
func CreateRandomFuncs(ctx context.Context) map[string]any {
ns := &RandomFuncs{ctx}
return map[string]any{
"random": func() any { return ns },
}
}
// RandomFuncs -
type RandomFuncs struct {
ctx context.Context
}
// ASCII -
func (RandomFuncs) ASCII(count any) (string, error) {
n, err := conv.ToInt(count)
if err != nil {
return "", fmt.Errorf("count must be an integer: %w", err)
}
return random.StringBounds(n, ' ', '~')
}
// Alpha -
func (RandomFuncs) Alpha(count any) (string, error) {
n, err := conv.ToInt(count)
if err != nil {
return "", fmt.Errorf("count must be an integer: %w", err)
}
return random.StringRE(n, "[[:alpha:]]")
}
// AlphaNum -
func (RandomFuncs) AlphaNum(count any) (string, error) {
n, err := conv.ToInt(count)
if err != nil {
return "", fmt.Errorf("count must be an integer: %w", err)
}
return random.StringRE(n, "[[:alnum:]]")
}
// String -
func (RandomFuncs) String(count any, args ...any) (string, error) {
c, err := conv.ToInt(count)
if err != nil {
return "", fmt.Errorf("count must be an integer: %w", err)
}
if c == 0 {
return "", fmt.Errorf("count must be greater than 0")
}
m := ""
switch len(args) {
case 0:
m = ""
case 1:
m = conv.ToString(args[0])
case 2:
var l, u rune
if isString(args[0]) && isString(args[1]) {
l, u, err = toCodePoints(args[0].(string), args[1].(string))
if err != nil {
return "", err
}
} else {
nl, err := conv.ToInt(args[0])
if err != nil {
return "", fmt.Errorf("lower must be an integer: %w", err)
}
nu, err := conv.ToInt(args[1])
if err != nil {
return "", fmt.Errorf("upper must be an integer: %w", err)
}
l, u = rune(nl), rune(nu)
}
return random.StringBounds(c, l, u)
}
return random.StringRE(c, m)
}
func isString(s any) bool {
switch s.(type) {
case string:
return true
default:
return false
}
}
var rlen = utf8.RuneCountInString
func toCodePoints(l, u string) (rune, rune, error) {
// no way are these representing valid printable codepoints - we'll treat
// them as runes
if rlen(l) == 1 && rlen(u) == 1 {
lower, _ := utf8.DecodeRuneInString(l)
upper, _ := utf8.DecodeRuneInString(u)
return lower, upper, nil
}
li, err := strconv.ParseInt(l, 0, 32)
if err != nil {
return 0, 0, err
}
ui, err := strconv.ParseInt(u, 0, 32)
if err != nil {
return 0, 0, err
}
return rune(li), rune(ui), nil
}
// Item -
func (RandomFuncs) Item(items any) (any, error) {
i, err := iconv.InterfaceSlice(items)
if err != nil {
return nil, err
}
return random.Item(i)
}
// Number -
func (RandomFuncs) Number(args ...any) (int64, error) {
var nMin, nMax int64
nMin, nMax = 0, 100
var err error
switch len(args) {
case 0:
case 1:
nMax, err = conv.ToInt64(args[0])
if err != nil {
return 0, fmt.Errorf("max must be a number: %w", err)
}
case 2:
nMin, err = conv.ToInt64(args[0])
if err != nil {
return 0, fmt.Errorf("min must be a number: %w", err)
}
nMax, err = conv.ToInt64(args[1])
if err != nil {
return 0, fmt.Errorf("max must be a number: %w", err)
}
}
return random.Number(nMin, nMax)
}
// Float -
func (RandomFuncs) Float(args ...any) (float64, error) {
var nMin, nMax float64
nMin, nMax = 0, 1.0
var err error
switch len(args) {
case 0:
case 1:
nMax, err = conv.ToFloat64(args[0])
if err != nil {
return 0, fmt.Errorf("max must be a number: %w", err)
}
case 2:
nMin, err = conv.ToFloat64(args[0])
if err != nil {
return 0, fmt.Errorf("min must be a number: %w", err)
}
nMax, err = conv.ToFloat64(args[1])
if err != nil {
return 0, fmt.Errorf("max must be a number: %w", err)
}
}
return random.Float(nMin, nMax)
}
|
