erp5_web_renderjs_ui: Fix 'Go Back' link on login_form

  Like in WebSite_login, came_from is an URI Template so we must expand the URI to handle the {&n.me}
  that can be present on the URL.

bt5/erp5_web_renderjs_ui/SkinTemplateItem/portal_skins/erp5_web_renderjs_ui/WebSection_renderCameFromURITemplate.py

+import re
+from ZTUtils import make_query
+
+portal = context.getPortalObject()
+
+# XXX Hardcoded behaviour for JS app.
+# Expect came_from to be an URL template
+person = portal.portal_membership.getAuthenticatedMember().getUserValue()
+url_parameter = "n.me"
+pattern = '{[&|?]%s}' % url_parameter
+if (person is None or not portal.portal_membership.checkPermission('View', person)):
+  came_from = re.sub(pattern, '', came_from)
+else:
+  prefix = "&" if "&%s" % url_parameter in came_from else "?"
+  came_from = re.sub(pattern, '%s%s' % (prefix, make_query({url_parameter: person.getRelativeUrl()})), came_from)
+
+return came_from

bt5/erp5_web_renderjs_ui/SkinTemplateItem/portal_skins/erp5_web_renderjs_ui/WebSection_renderCameFromURITemplate.xml

+<?xml version="1.0"?>
+<ZopeData>
+  <record id="1" aka="AAAAAAAAAAE=">
+    <pickle>
+      <global name="PythonScript" module="Products.PythonScripts.PythonScript"/>
+    </pickle>
+    <pickle>
+      <dictionary>
+        <item>
+            <key> <string>Script_magic</string> </key>
+            <value> <int>3</int> </value>
+        </item>
+        <item>
+            <key> <string>_bind_names</string> </key>
+            <value>
+              <object>
+                <klass>
+                  <global name="NameAssignments" module="Shared.DC.Scripts.Bindings"/>
+                </klass>
+                <tuple/>
+                <state>
+                  <dictionary>
+                    <item>
+                        <key> <string>_asgns</string> </key>
+                        <value>
+                          <dictionary>
+                            <item>
+                                <key> <string>name_container</string> </key>
+                                <value> <string>container</string> </value>
+                            </item>
+                            <item>
+                                <key> <string>name_context</string> </key>
+                                <value> <string>context</string> </value>
+                            </item>
+                            <item>
+                                <key> <string>name_m_self</string> </key>
+                                <value> <string>script</string> </value>
+                            </item>
+                            <item>
+                                <key> <string>name_subpath</string> </key>
+                                <value> <string>traverse_subpath</string> </value>
+                            </item>
+                          </dictionary>
+                        </value>
+                    </item>
+                  </dictionary>
+                </state>
+              </object>
+            </value>
+        </item>
+        <item>
+            <key> <string>_params</string> </key>
+            <value> <string>came_from</string> </value>
+        </item>
+        <item>
+            <key> <string>id</string> </key>
+            <value> <string>WebSection_renderCameFromURITemplate</string> </value>
+        </item>
+      </dictionary>
+    </pickle>
+  </record>
+</ZopeData>

bt5/erp5_web_renderjs_ui/SkinTemplateItem/portal_skins/erp5_web_renderjs_ui/WebSite_login.py

-import re
 REQUEST = context.REQUEST
 RESPONSE = REQUEST.RESPONSE
 from ZTUtils import make_query
@@ -35,16 +34,7 @@ else:
   # XXX How to warn user that password will expire?
   # is_user_account_password_expired_expire_date = REQUEST.get('is_user_account_password_expired_expire_date', 0)
 
-  # XXX Hardcoded behaviour for JS app.
-  # Expect came_from to be an URL template
-  person = portal.portal_membership.getAuthenticatedMember().getUserValue()
-  url_parameter = "n.me"
-  pattern = '{[&|?]%s}' % url_parameter
-  if (person is None or not portal.portal_membership.checkPermission('View', person)):
-    came_from = re.sub(pattern, '', came_from)
-  else:
-    prefix = "&" if "&%s" % url_parameter in came_from else "?"
-    came_from = re.sub(pattern, '%s%s' % (prefix, make_query({url_parameter: person.getRelativeUrl()})), came_from)
+  came_from = context.WebSection_renderCameFromURITemplate(came_from)  
   # RESPONSE.redirect(came_from or context.getPermanentURL(context));
   RESPONSE.setHeader('Location', came_from or context.getPermanentURL(context))
   RESPONSE.setStatus(303)

bt5/erp5_web_renderjs_ui/SkinTemplateItem/portal_skins/erp5_web_renderjs_ui/login_form.zpt

@@ -40,7 +40,7 @@
           <section tal:condition="not: portal/portal_membership/isAnonymousUser">
               <p i18n:domain="ui" i18n:translate="" >It seems you're already authenticated.</p>
               <p><a tal:condition="exists: request/came_from"
-                     tal:attributes="href request/came_from" >Go back</a></p>
+                     tal:attributes="href python:context.WebSection_renderCameFromURITemplate(request.came_from)" >Go back</a></p>
           </section>
 
           <section tal:condition="portal/portal_membership/isAnonymousUser">