From baa8d8f616cf533f40e5485334b03ddbc3037052 Mon Sep 17 00:00:00 2001
From: Marcin Jenczmyk <mjenczmyk@us.edu.pl>
Date: Tue, 17 Mar 2020 17:28:10 +0100
Subject: [PATCH] =?UTF-8?q?Whitelist=20+,=20#,=20.,=20-=20and=20=E2=80=93?=
 =?UTF-8?q?=20special=20characters?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 setup.py          | 2 +-
 src/downloader.py | 9 ++++++++-
 2 files changed, 9 insertions(+), 2 deletions(-)

diff --git a/setup.py b/setup.py
index 5954809..18b3bea 100644
--- a/setup.py
+++ b/setup.py
@@ -10,7 +10,7 @@
     'click==7.0',
     'google-api-python-client==1.6.3',
     'requests==2.20.0',
-    'python-slugify==1.2.6'
+    'python-slugify==4.0.0'
 ]
 
 dev_requirements = [
diff --git a/src/downloader.py b/src/downloader.py
index 58b3968..61e988c 100644
--- a/src/downloader.py
+++ b/src/downloader.py
@@ -1,4 +1,5 @@
 import os
+import re
 import sys
 import time
 
@@ -23,7 +24,13 @@ class PacktConnectionError(ConnectionError):
 
 def slugify_product_name(title):
     """Return book title with spaces replaced by underscore and unicodes replaced by characters valid in filenames."""
-    return slugify(title, separator='_', lowercase=False)
+    return slugify(
+        title,
+        separator='_',
+        lowercase=False,
+        regex_pattern=re.compile(r'[^-a-zA-Z0-9\+\#\.\-\–]+'),
+        replacements=[['–', '-']]
+    )
 
 
 def wait_for_computation(predicate, timeout, retry_after):