From 63bce1004dc1a0d97055607fb7795162766a325e Mon Sep 17 00:00:00 2001
From: Arun Prakash Jana <engineerarun@gmail.com>
Date: Sun, 20 Nov 2016 11:52:28 +0530
Subject: [PATCH] Store tags in lower case.

---
 README.md | 2 +-
 buku.1    | 2 +-
 buku.py   | 7 ++++---
 3 files changed, 6 insertions(+), 5 deletions(-)

diff --git a/README.md b/README.md
index 041e24e..55161a5 100644
--- a/README.md
+++ b/README.md
@@ -220,7 +220,7 @@ Shell completion scripts for Bash, Fish and Zsh can be found in respective subdi
 - URLs are unique in DB. The same URL cannot be added twice.
 - Bookmarks with immutable titles are listed with bold `(L)` after the URL.
 - **Tags**:
-  - Comma (`,`) is the tag delimiter in DB. A tag cannot have comma(s) in it. Tags are filtered (for unique tags) and sorted. Tags can be replaced.
+  - Comma (`,`) is the tag delimiter in DB. A tag cannot have comma(s) in it. Tags are filtered (for unique tags) and sorted. Tags are stored in lower case and can be replaced, appended or deleted.
 - **Update** operation:
   - If --title, --tag or --comment is passed without argument, clear the corresponding field from DB.
   - If --url is passed (and --title is omitted), update the title from web using the URL.
diff --git a/buku.1 b/buku.1
index 0fa601e..2e3c4cd 100644
--- a/buku.1
+++ b/buku.1
@@ -34,7 +34,7 @@ URLs are unique in DB. The same URL cannot be added twice.
 Bookmarks with immutable titles are listed with bold '(L)' after the URL.
 .PP
 \fITags\fR:
-  - Comma (',') is the tag delimiter in DB. A tag cannot have comma(s) in it. Tags are filtered (for unique tags) and sorted. Tags can be replaced.
+  - Comma (',') is the tag delimiter in DB. A tag cannot have comma(s) in it. Tags are filtered (for unique tags) and sorted. Tags are stored in lower case and can be replaced, appended or deleted.
 .PP
 \fIUpdate\fR operation:
   - If --title, --tag or --comment is passed without argument, clear the corresponding field from DB.
diff --git a/buku.py b/buku.py
index 36bcbb9..2783ea9 100755
--- a/buku.py
+++ b/buku.py
@@ -1624,11 +1624,12 @@ def parse_tags(keywords=None):
 
     orig_tags += tags.strip(DELIM).split(DELIM)
     for tag in orig_tags:
-        if tag not in unique_tags:
-            unique_tags += (tag, )  # Select unique tags
+        if tag.lower() not in unique_tags:
+            # Add unique tags in lowercase
+            unique_tags += (tag.lower(), )
 
     # Sort the tags
-    sorted_tags = sorted(unique_tags, key=str.lower)
+    sorted_tags = sorted(unique_tags)
 
     # Wrap with delimiter
     return '%s%s%s' % (DELIM, DELIM.join(sorted_tags), DELIM)