From c6c0ee76c2d47017a56ef8442d8616e2dd2fb9d7 Mon Sep 17 00:00:00 2001
From: Marco Milanesi <marcom@openquake.org>
Date: Tue, 6 Sep 2011 18:54:41 +0200
Subject: [PATCH] implemented github activity plugin

---
 pelican/plugins/github_activity.py | 27 +++++++++++++++++++++++++++
 pelican/signals.py                 |  1 +
 pelican/utils.py                   | 12 ++++++++++++
 3 files changed, 40 insertions(+)
 create mode 100644 pelican/plugins/github_activity.py

diff --git a/pelican/plugins/github_activity.py b/pelican/plugins/github_activity.py
new file mode 100644
index 00000000..d279e616
--- /dev/null
+++ b/pelican/plugins/github_activity.py
@@ -0,0 +1,27 @@
+from pelican import signals
+from pelican.utils import singleton
+
+@singleton
+class GitHubActivity():
+    def __init__(self, generator):
+        try:
+            import feedparser
+            self.ga = feedparser.parse(
+                generator.settings['GITHUB_ACTIVITY_FEED'])
+        except ImportError:
+            raise Exception("unable to find feedparser")
+
+    def fetch(self):
+        return [activity['content'][0]['value'].strip()
+            for activity in self.ga['entries']]
+
+def add_github_activity(generator, metadata):
+    if 'GITHUB_ACTIVITY_FEED' in generator.settings.keys():
+
+        ga = GitHubActivity(generator)
+
+        ga_html_snippets = ga.fetch()
+        generator.context['github_activity'] = ga_html_snippets
+
+def register():
+    signals.article_generate_context.connect(add_github_activity)
diff --git a/pelican/signals.py b/pelican/signals.py
index f2bf4547..fb50252f 100644
--- a/pelican/signals.py
+++ b/pelican/signals.py
@@ -2,3 +2,4 @@ from blinker import signal
 
 initialized = signal('pelican_initialized')
 article_generate_context = signal('article_generate_context')
+github_activity = signal('github_activity')
diff --git a/pelican/utils.py b/pelican/utils.py
index 8e48c2e9..a67836ca 100644
--- a/pelican/utils.py
+++ b/pelican/utils.py
@@ -222,3 +222,15 @@ def files_changed(path, extensions):
         LAST_MTIME = mtime
         return True
     return False
+
+def singleton(cls):
+    """
+        Singleton decorator for multiple calls inside plugins
+        for an example see pelican/plugins/github_activity.py
+    """
+    instances = {}
+    def getinstance(*args, **kwargs):
+        if cls not in instances:
+            instances[cls] = cls(*args, **kwargs)
+        return instances[cls]
+    return getinstance