From aecbc3c01412311db21999aef84fbd26e82be027 Mon Sep 17 00:00:00 2001
From: Matt Baer <matt@write.as>
Date: Fri, 9 Nov 2018 21:55:35 -0500
Subject: [PATCH] Support fuzzy username matching on login

This allows logging in with a non-normalized username.
---
 database.go | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/database.go b/database.go
index 590c5b0..8f16266 100644
--- a/database.go
+++ b/database.go
@@ -289,6 +289,14 @@ func (db *datastore) GetUserForAuth(username string) (*User, error) {
 	err := db.QueryRow("SELECT id, password, email, created FROM users WHERE username = ?", username).Scan(&u.ID, &u.HashedPass, &u.Email, &u.Created)
 	switch {
 	case err == sql.ErrNoRows:
+		// Check if they've entered the wrong, unnormalized username
+		username = getSlug(username, "")
+		if username != u.Username {
+			err = db.QueryRow("SELECT id FROM users WHERE username = ? LIMIT 1", username).Scan(&u.ID)
+			if err == nil {
+				return db.GetUserForAuth(username)
+			}
+		}
 		return nil, ErrUserNotFound
 	case err != nil:
 		log.Error("Couldn't SELECT user password: %v", err)