Merge f6dec88 into 8678614

CHANGES.rst

@@ -6,6 +6,9 @@ There's a frood who really knows where his towel is.
 2.3 (unreleased)
 ^^^^^^^^^^^^^^^^
 
+- Added the "Severe privacy" mode configuration option.
+  [keul]
+
 - Added German translations.
   [tohafi]
 

README.rst

@@ -79,9 +79,28 @@ Go to the 'Site Setup' page in the Plone interface and click on the
 There you can configure how **Social: Like Actions** will behave, which actions
 will be displayed and for which content types.
 
+Privacy and cookies
+^^^^^^^^^^^^^^^^^^^
+
+Social networks and privacy togheter is a thorny argument, let say that
+social media widget commonly tracks user actions and add 3rd party cookies.
+
+If privacy is something you must care about (for example: if you need to take
+care of the `European Cookie Law`_) sc.social.like provide a
+"*Severe privacy*" option.
+When enabled, social media widget are rendered as simple HTML links at the expense
+of features and user experience.
+
+This product is also respecting the `Do Not Track`_ browser user's preference.
+If the user configured his browser for beeing not tracked, social media will
+be rendered as the "*Severe privacy*" settings is enabled.
+
 Screenshots
 ^^^^^^^^^^^
 
 .. image:: https://github.com/collective/sc.social.like/raw/master/docs/screenshot1.png
 
 .. image:: https://github.com/collective/sc.social.like/raw/master/docs/screenshot2.png
+
+.. _`European Cookie Law`: http://eur-lex.europa.eu/legal-content/EN/TXT/?uri=celex:32009L0136
+.. _`Do Not Track`: http://donottrack.us/

sc/social/like/browser/templates/metadata.pt

@@ -1,5 +1,5 @@
 <tal:metas i18n:domain="sc.social.like" tal:condition="view/enabled">
   <tal:plugin tal:repeat="plugin view/plugins">
     <tal:replace replace="structure plugin/html" />
-  </tal:plugin> 
+  </tal:plugin>
 </tal:metas>

sc/social/like/browser/viewlets.py

@@ -2,6 +2,7 @@
 from plone.app.layout.viewlets import ViewletBase
 from Products.Five.browser.pagetemplatefile import ViewPageTemplateFile
 from zope.component import getMultiAdapter
+from plone.memoize.view import memoize
 
 
 class BaseLikeViewlet(ViewletBase):
@@ -20,6 +21,7 @@ def __init__(self, context, request, view, manager):
                                       name=u'sl_helper')
         self.typebutton = self.helper.typebutton()
 
+    @memoize
     def plugins(self):
         context = self.context
         render_method = self.render_method
@@ -28,15 +30,16 @@ def plugins(self):
         for plugin in plugins:
             if plugin and getattr(plugin, render_method)():
                 view = context.restrictedTraverse(plugin.view())
-                html = getattr(view, render_method)()
-                rendered.append({'id': plugin.id,
-                                 'html': html})
+                html_generator = getattr(view, render_method, None)
+                if html_generator:
+                    rendered.append({'id': plugin.id,
+                                     'html': html_generator()})
         return rendered
 
     def enabled(self):
         """Validates if the viewlet should be enabled for this context
         """
-        return self.helper.enabled()
+        return self.helper.enabled() and self.plugins()
 
     # HACK: fixes https://bitbucket.org/takaki/sc.social.like/issue/1
     def update(self):
@@ -68,4 +71,20 @@ class SocialLikesViewlet(BaseLikeViewlet):
     """Viewlet used to display the buttons
     """
     render = ViewPageTemplateFile('templates/sociallikes.pt')
-    render_method = 'plugin'
+
+    @property
+    def render_method(self):
+        tools = getMultiAdapter((self.context, self.request),
+                                name=u'plone_tools')
+        site_properties = tools.properties()
+        # global cookie settings for privacy level
+        if self.request.cookies.get('social-optout', None) == 'true' or \
+                self.request.get_header('HTTP_DNT') == '1':
+            return 'link'
+        # site specific privacy level check
+        if getattr(site_properties, 'sc_social_likes_properties') \
+                and getattr(site_properties.sc_social_likes_properties,
+                            'privacy') and \
+                site_properties.sc_social_likes_properties.privacy:
+            return 'link'
+        return 'plugin'

sc/social/like/configure.zcml

@@ -8,7 +8,7 @@
     <five:registerPackage package="." initialize=".initialize" />
 
     <include zcml:condition="have plone-4" package="Products.CMFCore" file="permissions.zcml" />
-    
+
     <include file="profiles.zcml" />
     <include package=".browser" />
     <include package=".controlpanel" />

sc/social/like/controlpanel/likes.pt

@@ -124,7 +124,7 @@
                            i18n:translate="" i18n:domain="sc.social.like">
                           Configure each plugin.
                       </span>
-                    </label>                    
+                    </label>
                     <ul tal:define="plugins view/plugins_configs">
                       <li tal:repeat="plugin plugins">
                         <a tal:attributes="href plugin/url;

sc/social/like/controlpanel/likes.py

@@ -72,6 +72,19 @@ class IProvidersSchema(Interface):
         vocabulary=styles,
     )
 
+    privacy = schema.Bool(
+        title=_(u'Severe privacy'),
+        description=_(
+            u'help_privacy',
+            default=u'If enabled, the site will not provide advanced sharing '
+                    u'widgets , instead simple links will be used.\n'
+                    u'This will limits user experience and features '
+                    u'(like the share count) but will enhance users privacy: '
+                    u'no 3rd party cookies will be sent to users.'
+        ),
+        default=False,
+    )
+
 
 class BaseControlPanelAdapter(SchemaAdapterBase):
     """ Base control panel adapter """
@@ -90,6 +103,7 @@ class LikeControlPanelAdapter(BaseControlPanelAdapter):
     enabled_portal_types = PFP(IProvidersSchema['enabled_portal_types'])
     typebutton = PFP(IProvidersSchema['typebutton'])
     plugins_enabled = PFP(IProvidersSchema['plugins_enabled'])
+    privacy = PFP(IProvidersSchema['privacy'])
 
 
 class ProvidersControlPanel(ControlPanelForm):
@@ -105,7 +119,7 @@ class ProvidersControlPanel(ControlPanelForm):
     form_name = _('Social: Like Actions')
 
     def plugins_configs(self):
-        ''' Return Plugins and their configuration pages '''
+        """ Return Plugins and their configuration pages """
         context = aq_inner(self.context)
         portal_url = getToolByName(context, 'portal_url')()
         registered = dict(getUtilitiesFor(IPlugin))

sc/social/like/interfaces/socialikes.py

@@ -18,28 +18,28 @@ class IHelperView(Interface):
     """
     """
     def configs():
-        ''' Social Like configuration '''
+        """ Social Like configuration """
 
     def enabled_portal_types():
-        ''' Portal Types that will display our viewlet '''
+        """ Portal Types that will display our viewlet """
 
     def plugins_enabled():
-        ''' List of plugins enabled '''
+        """ List of plugins enabled """
 
     def typebutton():
-        ''' Button to be used '''
+        """ Button to be used """
 
     def enabled(view):
-        '''
+        """
         Social Like is enabled for this context and provided view
         (when provided)
-        '''
+        """
 
     def available_plugins():
-        ''' Return available plugins '''
+        """ Return available plugins """
 
     def plugins():
-        ''' Return enabled plugins '''
+        """ Return enabled plugins """
 
     def view_template_id():
-        ''' View or template id for this context '''
+        """ View or template id for this context """