From: Matthijs Kooijman <matthijs@stdin.nl>
Date: Sun, 10 Feb 2008 15:43:55 +0000 (+0100)
Subject:  * Add an encode_email tag library used to somewhat encode email addresses. Code... 
X-Git-Url: https://git.stderr.nl/gitweb?p=matthijs%2Fprojects%2Fxerxes.git;a=commitdiff_plain;h=2cdeb70eadf0c6cf18049b5b2e4f66a1309a6c96

 * Add an encode_email tag library used to somewhat encode email addresses. Code taken verbatim from djangosnippets.org/snippets/216/.
---

diff --git a/tools/templatetags/encode_email.py b/tools/templatetags/encode_email.py
new file mode 100644
index 0000000..6a737d1
--- /dev/null
+++ b/tools/templatetags/encode_email.py
@@ -0,0 +1,52 @@
+import random
+from django import template
+"""
+    Randomized string encoding
+    Inspired by John Gruber's Markdown: 
+    http://daringfireball.net/projects/markdown/syntax#autolink
+"""
+register = template.Library()
+
+#@template.stringfilter
+def encode_string(value):
+    """
+    Encode a string into it's equivalent html entity.
+
+    The tag will randomly choose to represent the character as a hex digit or
+    decimal digit.
+   
+    Use {{ obj.name|encode_string }}
+    
+    {{ "person"|encode_string }} Becomes something like:
+    &#112;&#101;&#x72;&#x73;&#x6f;&#110;
+    """
+    e_string = "" 
+    for a in value:
+        type = random.randint(0,1)
+        if type:
+            en = "&#x%x;" % ord(a)
+        else:
+            en = "&#%d;" % ord(a)
+        e_string += en 
+    return e_string
+
+register.filter("encode_string", encode_string)
+
+def encode_mailto(value, arg):
+    """
+    Encode an e-mail address and its corresponding link name to its equivalent
+    html entities.
+
+    Use {{ obj.email|encode_mailto:obj.name }}
+    
+    {{ "j@j.com"|encode_mailto:"j" }} Becomes something like:
+    <a href="&#x6d;&#x61;&#x69;&#x6c;&#x74;&#111;&#x3a;&#106;&#x40;&#106;\
+    &#46;&#99;&#x6f;&#x6d;">&#x6a;</a>
+    """
+    address = 'mailto:%s' % value
+    address = encode_string(address)
+    name = encode_string(arg)
+    tag = "<a href=\"%s\">%s</a>" % (address, name)
+    return tag
+
+register.filter("encode_mailto", encode_mailto)