Make tag search and assignment case insensitive (#56)

* Make tag assignment and search case-insensitive (#45)

* Add tests for tag case-sensitivity and deduplication (#45)

Co-authored-by: Sascha Ißbrücker <sissbruecker@lyska.io>

bookmarks/models.py

@@ -4,6 +4,8 @@ from django import forms
 from django.contrib.auth import get_user_model
 from django.db import models
 
+from bookmarks.utils import unique
+
 
 class Tag(models.Model):
     name = models.CharField(max_length=64)
@@ -18,7 +20,8 @@ def parse_tag_string(tag_string: str, delimiter: str = ','):
     if not tag_string:
         return []
     names = tag_string.strip().split(delimiter)
-    names = [name for name in names if name]
+    names = [name.strip() for name in names if name]
+    names = unique(names, str.lower)
     names.sort(key=str.lower)
 
     return names