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diff --git a/author/author.go b/author/author.go
index bf3bfe1..e2e9508 100644
--- a/author/author.go
+++ b/author/author.go
@@ -1,127 +1,128 @@
/*
* Copyright © 2018 A Bunch Tell LLC.
*
* This file is part of WriteFreely.
*
* WriteFreely is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, included
* in the LICENSE file in this source code package.
*/
package author
import (
"github.com/writeas/writefreely/config"
"os"
"path/filepath"
"regexp"
)
// Regex pattern for valid usernames
var validUsernameReg = regexp.MustCompile("^[a-zA-Z0-9][a-zA-Z0-9-]*$")
// List of reserved usernames
var reservedUsernames = map[string]bool{
"a": true,
"about": true,
"add": true,
"admin": true,
"administrator": true,
"adminzone": true,
"api": true,
"article": true,
"articles": true,
"auth": true,
"authenticate": true,
"browse": true,
"c": true,
"categories": true,
"category": true,
"changes": true,
"community": true,
"create": true,
"css": true,
"data": true,
"dev": true,
"developers": true,
"draft": true,
"drafts": true,
"edit": true,
"edits": true,
"faq": true,
"feed": true,
"feedback": true,
"guide": true,
"guides": true,
"help": true,
"index": true,
"invite": true,
"js": true,
"login": true,
"logout": true,
"me": true,
"media": true,
"meta": true,
"metadata": true,
"new": true,
"news": true,
+ "oauth": true,
"post": true,
"posts": true,
"privacy": true,
"publication": true,
"publications": true,
"publish": true,
"random": true,
"read": true,
"reader": true,
"register": true,
"remove": true,
"signin": true,
"signout": true,
"signup": true,
"start": true,
"status": true,
"summary": true,
"support": true,
"tag": true,
"tags": true,
"team": true,
"template": true,
"templates": true,
"terms": true,
"terms-of-service": true,
"termsofservice": true,
"theme": true,
"themes": true,
"tips": true,
"tos": true,
"update": true,
"updates": true,
"user": true,
"users": true,
"yourname": true,
}
// IsValidUsername returns true if a given username is neither reserved nor
// of the correct format.
func IsValidUsername(cfg *config.Config, username string) bool {
// Username has to be above a character limit
if len(username) < cfg.App.MinUsernameLen {
return false
}
// Username is invalid if page with the same name exists. So traverse
// available pages, adding them to reservedUsernames map that'll be checked
// later.
filepath.Walk(filepath.Join(cfg.Server.PagesParentDir, "pages"), func(path string, i os.FileInfo, err error) error {
reservedUsernames[i.Name()] = true
return nil
})
// Username is invalid if it is reserved!
if _, reserved := reservedUsernames[username]; reserved {
return false
}
// TODO: use correct regexp function here
return len(validUsernameReg.FindStringSubmatch(username)) > 0
}

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