Refactor to more robust implementation

In order to avoid string manipulation or modify route params (to make them unambiguous for `url_for`), we are accepting a behavior change:

When being redirected to the canonical path for a group, if you requested a group show path starting with `/groups/…` then you’ll now be redirected to the group at root `/…`.

6 files changed, 33 insertions, 13 deletions

diff --git a/app/controllers/concerns/routable_actions.rb b/app/controllers/concerns/routable_actions.rb
index a5b793081b2..4199da9cdf5 100644
--- a/app/controllers/concerns/routable_actions.rb
+++ b/app/controllers/concerns/routable_actions.rb
@@ -32,19 +32,7 @@ module RoutableActions
       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 full_canonical_path(canonical_path, requested_full_path)
-    end
-  end
-
-  def full_canonical_path(canonical_path, requested_full_path)
-    request_path = request.original_fullpath
-    top_level_route_regex = %r{\A(/#{Regexp.union(DynamicPathValidator::TOP_LEVEL_ROUTES)}/)#{requested_full_path}}
-    top_level_route_match = request_path.match(top_level_route_regex)
-
-    if top_level_route_match
-      request_path.sub(top_level_route_regex, "\\1#{canonical_path}")
-    else
-      request_path.sub(requested_full_path, canonical_path)
+      redirect_to build_canonical_path(routable)
     end
   end
 end
diff --git a/app/controllers/groups/application_controller.rb b/app/controllers/groups/application_controller.rb
index afffb813b44..c0ac47e363d 100644
--- a/app/controllers/groups/application_controller.rb
+++ b/app/controllers/groups/application_controller.rb
@@ -31,4 +31,10 @@ class Groups::ApplicationController < ApplicationController
       return render_403
     end
   end
+
+  def build_canonical_path(group)
+    params[:group_id] = group.to_param
+    
+    url_for(params)
+  end
 end
diff --git a/app/controllers/groups_controller.rb b/app/controllers/groups_controller.rb
index 1515173d0ac..965ced4d372 100644
--- a/app/controllers/groups_controller.rb
+++ b/app/controllers/groups_controller.rb
@@ -169,4 +169,12 @@ class GroupsController < Groups::ApplicationController
       @notification_setting = current_user.notification_settings_for(group)
     end
   end
+
+  def build_canonical_path(group)
+    return group_path(group) if action_name == 'show' # root group path
+    
+    params[:id] = group.to_param
+
+    url_for(params)
+  end
 end
diff --git a/app/controllers/projects/application_controller.rb b/app/controllers/projects/application_controller.rb
index 12e4a6999ae..cb4bd0ad5f5 100644
--- a/app/controllers/projects/application_controller.rb
+++ b/app/controllers/projects/application_controller.rb
@@ -29,6 +29,13 @@ class Projects::ApplicationController < ApplicationController
     @project = find_routable!(Project, path, extra_authorization_proc: auth_proc)
   end
 
+  def build_canonical_path(project)
+    params[:namespace_id] = project.namespace.to_param
+    params[:project_id] = project.to_param
+
+    url_for(params)
+  end
+
   def repository
     @repository ||= project.repository
   end
diff --git a/app/controllers/projects_controller.rb b/app/controllers/projects_controller.rb
index 63d018c8cbf..544715d62ea 100644
--- a/app/controllers/projects_controller.rb
+++ b/app/controllers/projects_controller.rb
@@ -365,4 +365,11 @@ class ProjectsController < Projects::ApplicationController
   def project_view_files_allowed?
     !project.empty_repo? && can?(current_user, :download_code, project)
   end
+
+  def build_canonical_path(project)
+    params[:namespace_id] = project.namespace.to_param
+    params[:id] = project.to_param
+
+    url_for(params)
+  end
 end
diff --git a/app/controllers/users_controller.rb b/app/controllers/users_controller.rb
index ba22b2f9d29..19fc1e5de49 100644
--- a/app/controllers/users_controller.rb
+++ b/app/controllers/users_controller.rb
@@ -138,4 +138,8 @@ class UsersController < ApplicationController
   def projects_for_current_user
     ProjectsFinder.new(current_user: current_user).execute
   end
+
+  def build_canonical_path(user)
+    url_for(params.merge(username: user.to_param))
+  end
 end