chore: add missing file

lib/pact_broker/api/resources/branch_versions.rb

@@ -0,0 +1,47 @@
+require "pact_broker/api/resources/base_resource"
+require "pact_broker/configuration"
+require "pact_broker/api/decorators/versions_decorator"
+require "pact_broker/api/resources/pagination_methods"
+
+
+module PactBroker
+  module Api
+    module Resources
+      class BranchVersions < BaseResource
+        include PaginationMethods
+
+        def content_types_provided
+          [["application/hal+json", :to_json]]
+        end
+
+        def allowed_methods
+          ["GET", "OPTIONS"]
+        end
+
+        def resource_exists?
+          !!branch
+        end
+
+        def to_json
+          decorator_class(:versions_decorator).new(versions).to_json(**decorator_options(identifier_from_path.merge(resource_title: resource_title)))
+        end
+
+        def versions
+          @versions ||= version_service.find_pacticipant_versions_in_reverse_order(pacticipant_name, { branch_name: identifier_from_path[:branch_name] }, pagination_options)
+        end
+
+        def policy_name
+          :'versions::versions'
+        end
+
+        def branch
+          @branch ||= branch_service.find_branch(**identifier_from_path.slice(:pacticipant_name, :branch_name))
+        end
+
+        def resource_title
+          "Versions for branch #{branch.name} of #{branch.pacticipant.name}"
+        end
+      end
+    end
+  end
+end