Move random string generation funcs to own file

store/random.go

@@ -0,0 +1,22 @@
+package store
+
+import (
+	"crypto/rand"
+)
+
+func Generate62RandomString(l int) string {
+	return GenerateRandomString("0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz", l)
+}
+
+func GenerateFriendlyRandomString(l int) string {
+	return GenerateRandomString("0123456789abcdefghijklmnopqrstuvwxyz", l)
+}
+
+func GenerateRandomString(dictionary string, l int) string {
+	var bytes = make([]byte, l)
+	rand.Read(bytes)
+	for k, v := range bytes {
+		 bytes[k] = dictionary[v%byte(len(dictionary))]
+	}
+	return string(bytes)
+}

store/store.go

@@ -4,11 +4,10 @@ import (
 	"os"
 	"io"
 	"bytes"
-	"crypto/rand"
 )
 
 const (
-	nameLen = 12
+	FriendlyIdLen = 12
 )
 
 func SavePost(outDir string, post []byte) (string, error) {
@@ -33,12 +32,5 @@ func SavePost(outDir string, post []byte) (string, error) {
 }
 
 func generateFileName() string {
-	c := nameLen
-	var dictionary string = "0123456789abcdefghijklmnopqrstuvwxyz"
-	var bytes = make([]byte, c)
-	rand.Read(bytes)
-	for k, v := range bytes {
-		 bytes[k] = dictionary[v%byte(len(dictionary))]
-	}
-	return string(bytes)
+	return GenerateFriendlyRandomString(FriendlyIdLen)
 }