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-rw-r--r--app/controllers/concerns/routable_actions.rb38
1 files changed, 38 insertions, 0 deletions
diff --git a/app/controllers/concerns/routable_actions.rb b/app/controllers/concerns/routable_actions.rb
new file mode 100644
index 00000000000..4199da9cdf5
--- /dev/null
+++ b/app/controllers/concerns/routable_actions.rb
@@ -0,0 +1,38 @@
+module RoutableActions
+ extend ActiveSupport::Concern
+
+ def find_routable!(routable_klass, requested_full_path, extra_authorization_proc: nil)
+ routable = routable_klass.find_by_full_path(requested_full_path, follow_redirects: request.get?)
+
+ if routable_authorized?(routable, extra_authorization_proc)
+ ensure_canonical_path(routable, requested_full_path)
+ routable
+ else
+ route_not_found
+ nil
+ end
+ end
+
+ def routable_authorized?(routable, extra_authorization_proc)
+ action = :"read_#{routable.class.to_s.underscore}"
+ return false unless can?(current_user, action, routable)
+
+ if extra_authorization_proc
+ extra_authorization_proc.call(routable)
+ else
+ true
+ end
+ end
+
+ def ensure_canonical_path(routable, requested_full_path)
+ return unless request.get?
+
+ canonical_path = routable.full_path
+ if canonical_path != requested_full_path
+ if canonical_path.casecmp(requested_full_path) != 0
+ flash[:notice] = "#{routable.class.to_s.titleize} '#{requested_full_path}' was moved to '#{canonical_path}'. Please update any links and bookmarks that may still have the old path."
+ end
+ redirect_to build_canonical_path(routable)
+ end
+ end
+end