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/dailymotion/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 DailymotionBrowser
@@ -30,7 +31,7 @@ from .video import DailymotionVideo
 __all__ = ['DailymotionBackend']
 
 
-class DailymotionBackend(BaseBackend, ICapVideo):
+class DailymotionBackend(BaseBackend, ICapVideo, ICapCollection):
     NAME = 'dailymotion'
     MAINTAINER = 'Romain Bignon'
     EMAIL = 'romain@weboob.org'
@@ -44,7 +45,7 @@ class DailymotionBackend(BaseBackend, ICapVideo):
             return self.browser.get_video(_id)
 
     SORTBY = ['relevance', 'rated', 'visited', None]
-    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, self.SORTBY[sortby])
 
@@ -59,4 +60,21 @@ class DailymotionBackend(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 Dailymotion videos'
+            return
+        raise CollectionNotFound(collection.split_path)
+
     OBJECTS = {DailymotionVideo: fill_video}

modules/dailymotion/browser.py

@@ -47,15 +47,18 @@ class DailymotionBrowser(BaseBrowser):
         self.location('/1')
 
     def search_videos(self, pattern, sortby):
-        if not pattern:
-            self.home()
+        pattern = pattern.replace('/', '').encode('utf-8')
+        if sortby is None:
+            url = '/search/%s/1' % quote_plus(pattern)
         else:
-            pattern = pattern.replace('/', '').encode('utf-8')
-            if sortby is None:
-                url = '/search/%s/1' % quote_plus(pattern)
-            else:
-                url = '/%s/search/%s/1' % (sortby, quote_plus(pattern))
-            self.location(url)
+            url = '/%s/search/%s/1' % (sortby, quote_plus(pattern))
+        self.location(url)
+
+        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()

modules/dailymotion/test.py

@@ -19,14 +19,23 @@
 
 
 from weboob.tools.test import BackendTest
+from weboob.capabilities.video import BaseVideo
+
 
 class DailymotionTest(BackendTest):
     BACKEND = 'dailymotion'
 
-    def test_dailymotion(self):
+    def test_search(self):
         l = list(self.backend.search_videos('chirac'))
         self.assertTrue(len(l) > 0)
         v = l[0]
         self.backend.fillobj(v, ('url',))
         self.assertTrue(v.url and v.url.startswith('http://'), 'URL for video "%s" not found: %s' % (v.id, v.url))
         self.backend.browser.openurl(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',))
+        self.assertTrue(v.url and v.url.startswith('http://'), 'URL for video "%s" not found: %s' % (v.id, v.url))