Move the "empty search for latest" to collections

There is now a "latest" collection (or "latest_nsfw").
The feature didn't look much used, since it didn't work on many
backends.
Using collections will make it easy to support other things
like most viewed, featured, etc.
As a bonus, I added tests for every backend with the feature.

modules/francetelevisions/backend.py

@@ -20,7 +20,8 @@
 
 from __future__ import with_statement
 
-from weboob.capabilities.video import ICapVideo
+from weboob.capabilities.video import ICapVideo, BaseVideo
+from weboob.capabilities.collection import ICapCollection, CollectionNotFound
 from weboob.tools.backend import BaseBackend
 
 from .browser import PluzzBrowser
@@ -30,7 +31,7 @@ from .video import PluzzVideo
 __all__ = ['PluzzBackend']
 
 
-class PluzzBackend(BaseBackend, ICapVideo):
+class PluzzBackend(BaseBackend, ICapVideo, ICapCollection):
     NAME = 'francetelevisions'
     MAINTAINER = 'Romain Bignon'
     EMAIL = 'romain@weboob.org'
@@ -43,7 +44,7 @@ class PluzzBackend(BaseBackend, ICapVideo):
         with self.browser:
             return self.browser.get_video(_id)
 
-    def search_videos(self, pattern=None, sortby=ICapVideo.SEARCH_RELEVANCE, nsfw=False, max_results=None):
+    def search_videos(self, pattern, sortby=ICapVideo.SEARCH_RELEVANCE, nsfw=False, max_results=None):
         with self.browser:
             return self.browser.search_videos(pattern)
 
@@ -58,4 +59,21 @@ class PluzzBackend(BaseBackend, ICapVideo):
 
         return video
 
+    def iter_resources(self, objs, split_path):
+        if BaseVideo in objs:
+            collection = self.get_collection(objs, split_path)
+            if collection.path_level == 0:
+                yield self.get_collection(objs, [u'latest'])
+            if collection.split_path == [u'latest']:
+                for video in self.browser.latest_videos():
+                    yield video
+
+    def validate_collection(self, objs, collection):
+        if collection.path_level == 0:
+            return
+        if BaseVideo in objs and collection.split_path == [u'latest']:
+            collection.title = u'Latest France Télévisions videos'
+            return
+        raise CollectionNotFound(collection.split_path)
+
     OBJECTS = {PluzzVideo: fill_video}

modules/francetelevisions/browser.py

@@ -59,10 +59,13 @@ class PluzzBrowser(BaseBrowser):
         self.location('/replay/1')
 
     def search_videos(self, pattern):
-        if not pattern:
-            self.home()
-        else:
-            self.location(self.buildurl('/recherche.html', q=pattern.encode('utf-8')))
+        self.location(self.buildurl('/recherche.html', q=pattern.encode('utf-8')))
+
+        assert self.is_on_page(IndexPage)
+        return self.page.iter_videos()
+
+    def latest_videos(self):
+        self.home()
 
         assert self.is_on_page(IndexPage)
         return self.page.iter_videos()
@@ -79,11 +82,11 @@ class PluzzBrowser(BaseBrowser):
 
         for vid in root.find('videos'):
             if vid.findtext('statut') == 'ONLINE' and vid.findtext('format') == 'wmv':
-                video.url =  vid.findtext('url')
+                video.url = vid.findtext('url')
 
         date = root.findtext('diffusions/diffusion')
         if date:
-            video.date =  datetime.datetime.strptime(date, '%d/%m/%Y %H:%M')
+            video.date = datetime.datetime.strptime(date, '%d/%m/%Y %H:%M')
 
         video.description = root.findtext('synopsis')
 

modules/francetelevisions/test.py

@@ -19,14 +19,22 @@
 
 
 from weboob.tools.test import BackendTest
+from weboob.capabilities.video import BaseVideo
 
 class PluzzTest(BackendTest):
     BACKEND = 'francetelevisions'
 
-    def test_francetelevisions(self):
+    def test_search(self):
         # If the test fails, it might be good news!
         l = list(self.backend.search_videos('Plus belle la vie'))
         self.assertTrue(len(l) > 0)
         v = l[0]
         self.backend.fillobj(v, ('url',))
         self.assertTrue(v.url and v.url.startswith('mms://'), 'URL for video "%s" not found: %s' % (v.id, v.url))
+
+    def test_latest(self):
+        l = list(self.backend.iter_resources([BaseVideo], [u'latest']))
+        assert len(l)
+        v = l[0]
+        self.backend.fillobj(v, ('url',))
+        assert v.url