Use can? policies for lib/api/runners.rb

app/policies/ci/runner_policy.rb

 module Ci
   class RunnerPolicy < BasePolicy
-    with_options scope: :subject, score: 0
-    condition(:shared) { @subject.is_shared? }
-
     with_options scope: :subject, score: 0
     condition(:locked, scope: :subject) { @subject.locked? }
 
@@ -10,7 +7,10 @@ module Ci
 
     rule { anonymous }.prevent_all
     rule { admin | authorized_runner }.enable :assign_runner
-    rule { ~admin & shared }.prevent :assign_runner
+    rule { admin | authorized_runner }.enable :read_runner
+    rule { admin | authorized_runner }.enable :update_runner
+    rule { admin | authorized_runner }.enable :delete_runner
+    rule { admin | authorized_runner }.enable :list_runner_jobs
     rule { ~admin & locked }.prevent :assign_runner
   end
 end

lib/api/runners.rb

@@ -184,14 +184,14 @@ module API
       def authenticate_show_runner!(runner)
         return if runner.is_shared || current_user.admin?
 
-        forbidden!("No access granted") unless user_can_access_runner?(runner)
+        forbidden!("No access granted") unless can?(current_user, :read_runner, runner)
       end
 
       def authenticate_update_runner!(runner)
         return if current_user.admin?
 
         forbidden!("Runner is shared") if runner.is_shared?
-        forbidden!("No access granted") unless user_can_access_runner?(runner)
+        forbidden!("No access granted") unless can?(current_user, :update_runner, runner)
       end
 
       def authenticate_delete_runner!(runner)
@@ -199,7 +199,7 @@ module API
 
         forbidden!("Runner is shared") if runner.is_shared?
         forbidden!("Runner associated with more than one project") if runner.projects.count > 1
-        forbidden!("No access granted") unless user_can_access_runner?(runner)
+        forbidden!("No access granted") unless can?(current_user, :delete_runner, runner)
       end
 
       def authenticate_enable_runner!(runner)
@@ -208,17 +208,13 @@ module API
         forbidden!("Runner is a group runner") if runner.group_type?
         return if current_user.admin?
 
-        forbidden!("No access granted") unless user_can_access_runner?(runner)
+        forbidden!("No access granted") unless can?(current_user, :assign_runner, runner)
       end
 
       def authenticate_list_runners_jobs!(runner)
         return if current_user.admin?
 
-        forbidden!("No access granted") unless user_can_access_runner?(runner)
-      end
-
-      def user_can_access_runner?(runner)
-        current_user.ci_authorized_runners.exists?(runner.id)
+        forbidden!("No access granted") unless can?(current_user, :list_runner_jobs, runner)
       end
     end
   end