Add support for generating local shortnames for twitter posts

Do a simple base64 encoding of the id value, and pass this to
http://postgr.es/p/<id>.

diff --git a/posttotwitter.py b/posttotwitter.py
index 146ff9dc7f74955fce02d24d0669ae62b8be0ff7..9e697b272af912e95af490d58bdb267f0679c0fc 100755 (executable)
--- a/posttotwitter.py
+++ b/posttotwitter.py
@@ -5,7 +5,7 @@
 This file contains the functions to generate short
 URLs and tweets from what's currently in the database.
 
-Copyright (C) 2009-2010 PostgreSQL Global Development Group
+Copyright (C) 2009-2011 PostgreSQL Global Development Group
 """
 
 # Post links to articles on twitter
@@ -18,6 +18,9 @@ import ConfigParser
 from twitterclient import TwitterClient
 
 
+# Simple map used to shorten id values to URLs
+_urlvalmap = ['0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z', 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', '-', '_']
+
 class PostToTwitter(TwitterClient):
        def __init__(self, cfg):
                TwitterClient.__init__(self, cfg)
@@ -108,6 +111,14 @@ class PostToTwitter(TwitterClient):
                return "%s..." % (txt[:(140-otherlen-3)])
 
 
+       # Trim an URL using http://postgr.es
+       def shortid(self, url):
+               s = ""
+               while id > 0:
+                       s = _idvalmap[id % 64] + s
+                       id /= 64
+               return "http://postgr.es/p/%s" % s
+
        # Trim an URL using http://bit.ly
        def shortlink(self, url):
                try: