# HG changeset patch
# User Dirk Olmes <dirk@xanthippe.ping.de>
# Date 1314108155 -7200
# Node ID 2cd30af937fa0e4df0d588e37b9ac31647b1a877
# Parent  5b131f82057d3b66b11949a674739b79b4382fe0
add the required methods for determining if a feed needs to be updated

diff -r 5b131f82057d -r 2cd30af937fa backend/couchdb/CouchDbBackend.py
--- a/backend/couchdb/CouchDbBackend.py	Tue Aug 23 14:36:58 2011 +0200
+++ b/backend/couchdb/CouchDbBackend.py	Tue Aug 23 16:02:35 2011 +0200
@@ -1,7 +1,9 @@
 
 from Preferences import Preferences
+from backend.couchdb.Feed import Feed
 import couchdb
 
+
 DATABASE = "feedtest"
 
 class CouchDbBackend(object):
@@ -38,10 +40,15 @@
         raise Exception("not yet implemented")
 
     def updateAllFeeds(self):
-        raise Exception("not yet implemented")
+        # TODO use a view instead of iterating all feeds
+        allFeeds = Feed.all(self.database)
+        for feed in allFeeds:
+            if feed.needsUpdate():
+                print("feed needs update " + str(feed))
 
     def expireFeedEntries(self):
-        raise Exception("not yet implemented")
+        print("Expiring feeds is not yet implemented")
+#        raise Exception("not yet implemented")
 
     def dispose(self):
         # nothing to do here
diff -r 5b131f82057d -r 2cd30af937fa backend/couchdb/Feed.py
--- a/backend/couchdb/Feed.py	Tue Aug 23 14:36:58 2011 +0200
+++ b/backend/couchdb/Feed.py	Tue Aug 23 16:02:35 2011 +0200
@@ -1,3 +1,7 @@
+
+from datetime import datetime
+
+DATE_FORMAT = "%Y-%m-%d %H:%M:%S"
 
 class Feed(object):
     @staticmethod
@@ -10,3 +14,15 @@
 
     def __getattr__(self, key):
         return self.row.value[key]
+
+    def needsUpdate(self):
+        updateDate = self._nextUpdateDate()
+        delta = datetime.now() - updateDate
+        return delta.total_seconds() > self._updateIntervalInSeconds()
+
+    def _nextUpdateDate(self):
+        nextUpdateString = self.next_update
+        return datetime.strptime(nextUpdateString, DATE_FORMAT)
+
+    def _updateIntervalInSeconds(self):
+        return self.update_interval * 60