revert back services changes

(cherry picked from commit 2cc6aaec)

app/services/projects/import_export/project_tree_restorer.rb

@@ -14,12 +14,12 @@ module Projects
         json = IO.read(@path)
         tree_hash = ActiveSupport::JSON.decode(json)
         relation_hash = {}
-        project_params = tree_hash.reject { |_key, value | value.is_a?(Array)}
-        @project = ::Projects::CreateService.new(@user, project_params.except('id')).execute
         ImportExport.project_tree.each do |relation|
           next if tree_hash[relation.to_s].empty?
           relation_hash[relation.to_s] = create_relation(relation, tree_hash[relation.to_s])
         end
+        project_params = tree_hash.delete_if { |_key, value | value.is_a?(Array)}
+        @project = ::Projects::CreateService.new(@user, project_params).execute
         @project.saved?
       end
 
@@ -28,7 +28,7 @@ module Projects
       def create_relation(relation, relation_hash_list)
         relation_hash_list.map do |relation_hash|
           Projects::ImportExport::RelationFactory.create(
-            relation_sym: relation, relation_hash: relation_hash, project: @project, user: @user)
+            relation_sym: relation, relation_hash: relation_hash)
         end
       end
     end

app/services/projects/import_export/relation_factory.rb

 module Projects
   module ImportExport
-    class RelationFactory
+    module RelationFactory
+      extend self
 
       OVERRIDES = { snippets: :project_snippets }
 
-      def self.create(*args)
-        new(*args).create
-      end
-
-      def initialize(relation_sym:, relation_hash:, project:, user:)
-        @relation_sym = parsed_relation_sym(relation_sym)
-        @relation_hash = relation_hash
-        @project = project
-        @user = user
-      end
-
-      def create
-        @relation_hash.delete('id')
-        init_service_or_class
+      def create(relation_sym:, relation_hash:)
+        relation_sym = parse_relation_sym(relation_sym)
+        klass = relation_class(relation_sym)
+        relation_hash.delete('id') #screw IDs for now
+        klass.new(relation_hash)
       end
 
       private
 
-      def init_service_or_class
-        # Attempt service first
-        relation_service.new(@project, @user, @relation_hash).execute
-      rescue NameError
-        relation_class.new(@relation_hash)
-      end
-
-      def relation_service
-        "#{@relation_sym.to_s.classify}::CreateService".constantize
-      end
-
-      def relation_class
-        @relation_sym.to_s.classify.constantize
+      def relation_class(relation_sym)
+        relation_sym.to_s.classify.constantize
       end
 
-      def parsed_relation_sym(relation_sym)
+      def parse_relation_sym(relation_sym)
         OVERRIDES[relation_sym] || relation_sym
       end
     end