WIP Add migration for flipping clipping planes that were created in OP (#9682)

db/migrate/20210713081724_flip_bcf_viewpoint_clipping_direction_selectively.rb

@@ -0,0 +1,43 @@
+class FlipBcfViewpointClippingDirectionSelectively < ActiveRecord::Migration[6.1]
+  def up
+    flip_op_clipping_planes
+  end
+
+  def down
+    flip_op_clipping_planes
+  end
+
+  private
+
+  def flip_op_clipping_planes
+    viewpoints = select_viewpoints_created_in_op
+    viewpoints.each do |viewpoint|
+      new_json_viewpoint = flip_clipping_planes(viewpoint.json_viewpoint)
+      viewpoint.update_column(:json_viewpoint, new_json_viewpoint)
+    end
+  end
+
+  def select_viewpoints_created_in_op
+    join_condition = %{
+      bcf_viewpoints.json_viewpoint->>'clipping_planes' IS NOT NULL
+      AND
+      (
+        bcf_issues.markup IS NULL
+        OR
+        XPATH_EXISTS('/comment()[contains(., ''Created by OpenProject'')]', bcf_issues.markup)
+      )
+    }
+    ::Bim::Bcf::Viewpoint.joins(:issue).where(join_condition)
+  end
+
+  def flip_clipping_planes(viewpoint)
+    viewpoint_dup = viewpoint.deep_dup
+    viewpoint_dup["clipping_planes"].each do |plane|
+      plane["direction"]["x"] *= -1
+      plane["direction"]["y"] *= -1
+      plane["direction"]["z"] *= -1
+    end
+
+    viewpoint_dup
+  end
+end

modules/bim/app/models/bim/bcf/viewpoint.rb

@@ -35,6 +35,10 @@ module Bim::Bcf
       end
     end
 
+    def clipping_planes?
+      json_viewpoint && json_viewpoint["clipping_planes"]
+    end
+
     def snapshot=(file)
       snapshot&.destroy
       attach_files('first' => { 'file' => file, 'description' => 'snapshot' })