From d85d270274d4f8a2834f8d97b64dcd6411cf2348 Mon Sep 17 00:00:00 2001
From: Benjamin VAUDOUR <b.vaudour@luence.fr>
Date: Sat, 23 Sep 2023 21:47:17 +0200
Subject: [PATCH] Module random

---
 random/random.go | 58 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 58 insertions(+)
 create mode 100644 random/random.go

diff --git a/random/random.go b/random/random.go
new file mode 100644
index 0000000..8fe96be
--- /dev/null
+++ b/random/random.go
@@ -0,0 +1,58 @@
+package random
+
+import (
+	"math/rand"
+	"strings"
+	"time"
+)
+
+const (
+	Digit      = "0123456789"
+	LowserCase = "abcdefghijklmnopqrstuvwxyz"
+	UpperCase  = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
+	Letter     = LowserCase + UpperCase
+	AlphaNum   = Digit + Letter
+	Special    = " !\"#$%&'()*+’-./:;<=>?@[\\]^_`{|}~"
+	All        = AlphaNum + Special
+)
+
+func choice(charClass []string) string {
+	out := strings.Join(charClass, "")
+	if len(out) == 0 {
+		out = AlphaNum
+	}
+
+	return out
+}
+
+func randomer() *rand.Rand {
+	return rand.New(rand.NewSource(time.Now().UnixNano()))
+}
+
+// Randomize retourne un tableau de taille size
+// et avec des valeurs aléatoires dans available.
+func Randomize[T any](size int, available []T) (out []T) {
+	lc, r := len(available), randomer()
+	out = make([]T, size)
+
+	for i := range out {
+		out[i] = available[r.Intn(lc)]
+	}
+
+	return
+}
+
+// BytesKey génère une clé de bytes.
+func BytesKey(size int, charClass ...string) []byte {
+	return Randomize(size, []byte(choice(charClass)))
+}
+
+// RunesKey génère une clé de runes.
+func RunesKey(size int, charClass ...string) []rune {
+	return Randomize(size, []rune(choice(charClass)))
+}
+
+// Key génère une clé sous forme de string.
+func Key(size int, charClass ...string) string {
+	return string(RunesKey(size, charClass...))
+}