Fix Facebook href to point to Canonical URL (#123)

* Fix Facebook href to point to Canonical URL

* Update setuptools version

* Fix changelog

* Set recommended versions of flake8 and friends

* Remove flake8 pinnings

Refs. collective/buildout.plonetest#29

CHANGES.rst

@@ -6,6 +6,10 @@ There's a frood who really knows where his towel is.
 2.10.1 (unreleased)
 ^^^^^^^^^^^^^^^^^^^
 
+- Fix ``data-href`` attribute on Facebook plugin to point to canonical URL;
+  this should finally fix the counter on the widget.
+  [rodfersou]
+
 - Fix Canonical URL updater form;
   a new upgrade step is provided to update the ``objects_provides`` catalog index (fixes `#115 <https://github.com/collective/sc.social.like/issues/115>`_).
   [hvelarde]

sc/social/like/plugins/facebook/browser.py

@@ -186,12 +186,11 @@ def type(self):
         return 'article'
 
     def share_link(self):
-        absolute_url = self.url
         params = dict(
             app_id=self.app_id,
             display='popup',
-            href=absolute_url,
-            redirect_uri=absolute_url,
+            href=self.canonical_url,
+            redirect_uri=self.url,
         )
         url = 'https://www.facebook.com/dialog/share?' + urlencode(params)
         return url

sc/social/like/plugins/facebook/templates/plugin.pt

@@ -2,7 +2,7 @@
     <!-- Facebook -->
     <div class="fb-like"
          tal:condition="view/fbshow_like"
-         tal:attributes="data-href view/url;
+         tal:attributes="data-href view/canonical_url;
                          data-send string:false;
                          data-action view/fbaction;
                          data-layout view/typebutton;
@@ -12,5 +12,5 @@
     <div class="fb-share-button"
          tal:condition="python: view.fbshow_share and not view.fbshow_like"
          tal:attributes="data-layout view/typebutton;
-                         data-href view/url;"></div>
-</tal:fb>
+                         data-href view/canonical_url;"></div>
+</tal:fb>