Merge branch 'bvl-external-auth-port' into 'master'

Port `read_cross_project` ability from EE

See merge request gitlab-org/gitlab-ce!17208

1 files changed, 47 insertions, 0 deletions

diff --git a/lib/gitlab/cross_project_access/check_collection.rb b/lib/gitlab/cross_project_access/check_collection.rb
new file mode 100644
index 00000000000..88376232065
--- /dev/null
+++ b/lib/gitlab/cross_project_access/check_collection.rb
@@ -0,0 +1,47 @@
+module Gitlab
+  class CrossProjectAccess
+    class CheckCollection
+      attr_reader :checks
+
+      def initialize
+        @checks = []
+      end
+
+      def add_collection(collection)
+        @checks |= collection.checks
+      end
+
+      def add_check(check)
+        @checks << check
+      end
+
+      def should_run?(object)
+        skips, runs = arranged_checks
+
+        # If one rule tells us to skip, we skip the cross project check
+        return false if skips.any? { |check| check.should_skip?(object) }
+
+        # If the rule isn't skipped, we run it if any of the checks says we
+        # should run
+        runs.any? { |check| check.should_run?(object) }
+      end
+
+      def arranged_checks
+        return [@skips, @runs] if @skips && @runs
+
+        @skips = []
+        @runs = []
+
+        @checks.each do |check|
+          if check.skip
+            @skips << check
+          else
+            @runs << check
+          end
+        end
+
+        [@skips, @runs]
+      end
+    end
+  end
+end