From 88fdc60a90922a9a5b5ac9b269d046e743e0770f Mon Sep 17 00:00:00 2001
From: Beth Skurrie <beth@bethesque.com>
Date: Fri, 25 Sep 2020 12:58:03 +1000
Subject: [PATCH] feat: add API endpoint for can-i-deploy for latest tagged
 pacticipant version

---
 lib/pact_broker/api.rb                        |  1 +
 lib/pact_broker/api/pact_broker_urls.rb       |  6 ++-
 .../can_i_deploy_pacticipant_version.rb       | 40 +++++++++++++++++++
 .../can_i_deploy_pacticipant_version_spec.rb  | 31 ++++++++++++++
 4 files changed, 77 insertions(+), 1 deletion(-)
 create mode 100644 lib/pact_broker/api/resources/can_i_deploy_pacticipant_version.rb
 create mode 100644 spec/lib/pact_broker/api/resources/can_i_deploy_pacticipant_version_spec.rb

diff --git a/lib/pact_broker/api.rb b/lib/pact_broker/api.rb
index 61c73b0c3..6f24d0f4e 100644
--- a/lib/pact_broker/api.rb
+++ b/lib/pact_broker/api.rb
@@ -71,6 +71,7 @@ module PactBroker
         add ['pacticipants', :pacticipant_name, 'versions'], Api::Resources::Versions, {resource_name: "pacticipant_versions"}
         add ['pacticipants', :pacticipant_name, 'versions', :pacticipant_version_number], Api::Resources::Version, {resource_name: "pacticipant_version"}
         add ['pacticipants', :pacticipant_name, 'latest-version', :tag], Api::Resources::Version, {resource_name: "latest_tagged_pacticipant_version"}
+        add ['pacticipants', :pacticipant_name, 'latest-version', :tag, 'can-i-deploy', 'to', :to], Api::Resources::CanIDeployPacticipantVersion, { resource_name: "can_i_deploy_latest_tagged_version" }
         add ['pacticipants', :pacticipant_name, 'latest-version', :tag, 'can-i-deploy', 'to', :to, 'badge'], Api::Resources::CanIDeployBadge, { resource_name: "can_i_deploy_badge" }
         add ['pacticipants', :pacticipant_name, 'latest-version'], Api::Resources::Version, {resource_name: "latest_pacticipant_version"}
         add ['pacticipants', :pacticipant_name, 'versions', :pacticipant_version_number, 'tags', :tag_name], Api::Resources::Tag, {resource_name: "pacticipant_version_tag"}
diff --git a/lib/pact_broker/api/pact_broker_urls.rb b/lib/pact_broker/api/pact_broker_urls.rb
index 917c9bb9b..dccb837e7 100644
--- a/lib/pact_broker/api/pact_broker_urls.rb
+++ b/lib/pact_broker/api/pact_broker_urls.rb
@@ -204,8 +204,12 @@ def templated_label_url_for_pacticipant pacticipant_name, base_url = ""
         pacticipant_url_from_params({ pacticipant_name: pacticipant_name }, base_url) + "/labels/{label}"
       end
 
+      def templated_can_i_deploy_url pacticipant_name, base_url = ""
+        pacticipant_url_from_params({ pacticipant_name: pacticipant_name }, base_url) + "/latest-version/{tag}/can-i-deploy/to/{environmentTag}"
+      end
+
       def templated_can_i_deploy_badge_url pacticipant_name, base_url = ""
-        pacticipant_url_from_params({ pacticipant_name: pacticipant_name }, base_url) + "/latest-version/{tag}/can-i-deploy/to/{environmentTag}/badge"
+        templated_can_i_deploy_url(pacticipant_name, base_url) + "/badge"
       end
 
       def label_url label, base_url
diff --git a/lib/pact_broker/api/resources/can_i_deploy_pacticipant_version.rb b/lib/pact_broker/api/resources/can_i_deploy_pacticipant_version.rb
new file mode 100644
index 000000000..6660ebe53
--- /dev/null
+++ b/lib/pact_broker/api/resources/can_i_deploy_pacticipant_version.rb
@@ -0,0 +1,40 @@
+require 'pact_broker/api/resources/matrix'
+require 'pact_broker/matrix/can_i_deploy_query_schema'
+require 'pact_broker/matrix/parse_can_i_deploy_query'
+
+module PactBroker
+  module Api
+    module Resources
+      class CanIDeployPacticipantVersion < Matrix
+        def initialize
+          super
+          selector = PactBroker::Matrix::UnresolvedSelector.new(pacticipant_name: pacticipant_name, latest: true, tag: identifier_from_path[:tag])
+          @options = {
+            latestby: 'cvp',
+            latest: true,
+            tag: identifier_from_path[:to]
+          }
+          @selectors = [selector]
+        end
+
+        def resource_exists?
+          !!version
+        end
+
+        def policy_name
+          :'matrix::can_i_deploy'
+        end
+
+        private
+
+        def version
+          @version ||= version_service.find_by_pacticipant_name_and_latest_tag(identifier_from_path[:pacticipant_name], identifier_from_path[:tag])
+        end
+
+        def results
+          @results ||= matrix_service.find(selectors, options)
+        end
+      end
+    end
+  end
+end
diff --git a/spec/lib/pact_broker/api/resources/can_i_deploy_pacticipant_version_spec.rb b/spec/lib/pact_broker/api/resources/can_i_deploy_pacticipant_version_spec.rb
new file mode 100644
index 000000000..e59a823d4
--- /dev/null
+++ b/spec/lib/pact_broker/api/resources/can_i_deploy_pacticipant_version_spec.rb
@@ -0,0 +1,31 @@
+require 'pact_broker/api/resources/can_i_deploy_pacticipant_version'
+require 'pact_broker/matrix/service'
+
+module PactBroker
+  module Api
+    module Resources
+      describe CanIDeployPacticipantVersion do
+        include_context "stubbed services"
+
+        before do
+          allow(PactBroker::Matrix::Service).to receive(:find).and_return([])
+          allow(pacticipant_service).to receive(:find_pacticipant_by_name).and_return(pacticipant)
+          allow(version_service).to receive(:find_by_pacticipant_name_and_latest_tag).and_return(version)
+          allow(PactBroker::Api::Decorators::MatrixDecorator).to receive(:new).and_return(decorator)
+        end
+
+        let(:pacticipant) { double('pacticipant') }
+        let(:version) { double('version') }
+        let(:path) { "/pacticipants/Foo/latest-version/main/can-i-deploy/to/prod" }
+        let(:json_response_body) { JSON.parse(subject.body, symbolize_names: true) }
+        let(:decorator) { double('decorator', to_json: 'response_body') }
+        let(:selectors) { double('selectors') }
+        let(:options) { double('options') }
+
+        subject { get(path, nil, 'Content-Type' => 'application/hal+json') }
+
+        it { is_expected.to be_a_hal_json_success_response }
+      end
+    end
+  end
+end