Consider Usenet Retention in searches

All providers should now consider usenet retention. I've tested newznab,
nzbx and "experimental", nzb.su and dognzb are newznab based so should
work but I can't test them.

mylar/findcomicfeed.py

@@ -29,8 +29,10 @@ def Startit(searchName, searchIssue, searchYear):
 
     if mylar.USE_MAXSIZE:
         size_constraints = size_constraints + "&maxsize=" + str(mylar.MAXSIZE)
-
-    feed = feedparser.parse("http://nzbindex.nl/rss/alt.binaries.comics.dcp/?sort=agedesc&" + str(size_constraints) + "&dq=%s&max=25&more=1" %joinSearch)
+    if mylar.USENET_RETENTION != None:
+	    max_age = "&age=" + str(mylar.USENET_RETENTION)
+		
+    feed = feedparser.parse("http://nzbindex.nl/rss/alt.binaries.comics.dcp/?sort=agedesc&" + str(size_constraints) + str(max_age) + "&dq=%s&max=25&more=1" %joinSearch)
 
     totNum = len(feed.entries)
 

mylar/prov_nzbx.py

@@ -1,7 +1,7 @@
 import lib.simplejson as json
 import mylar
 from mylar import logger, helpers
-import urllib2
+import urllib2, datetime
 
 
 def searchit(cm):
@@ -39,18 +39,24 @@ def searchit(cm):
                             url = item['nzb']
                             title = item['name']
                             size = item['size']
-                            
-                            entries.append({
-                                    'title':   str(title),
-                                    'link':    str(url)
-                                    })
+                            nzbdate = datetime.datetime.fromtimestamp(item['postdate'])
+                            nzbage = abs(( datetime.datetime.now()-nzbdate).days )
+                            if  nzbage <= mylar.USENET_RETENTION:
+                                entries.append({
+                                        'title':   str(title),
+                                        'link':    str(url)
+                                        })
+                                logger.fdebug('Found %s. Size: %s' % (title, helpers.bytes_to_mb(size)))
+                            else:
+                                logger.fdebug('%s outside usenet retention: %s days.' % (title, nzbage))
                             #resultlist.append((title, size, url, provider))
-                            logger.fdebug('Found %s. Size: %s' % (title, helpers.bytes_to_mb(size)))
                             
                         except Exception, e:
                             logger.error(u"An unknown error occurred trying to parse the feed: %s" % e)
 
             if len(entries) >= 1:
                 mres['entries'] = entries
+            else:
+			    mres = "no results"
         return mres