Add a build_id function to RepositoryArchitecture

This is a direct mapping to view=status in the backend

src/api/app/models/repository_architecture.rb

@@ -8,14 +8,10 @@ class RepositoryArchitecture < ApplicationRecord
   validates :repository, :architecture, :position, presence: true
   validates :repository, uniqueness: { scope: :architecture }
 
-  has_many :status_reports, as: :checkable, class_name: 'Status::Report', dependent: :destroy do
-    def for_uuid(uuid)
-      where(status_reports: { uuid: uuid })
-    end
+  has_many :status_reports, as: :checkable, class_name: 'Status::Report', dependent: :destroy
 
-    def latest
-      for_uuid(proxy_association.owner.build_id)
-    end
+  def build_id
+    Backend::Api::Build::Repository.build_id(repository.project.name, repository.name, architecture.name)
   end
 end
 

src/api/lib/backend/api/build/repository.rb

@@ -0,0 +1,17 @@
+module Backend
+  module Api
+    module Build
+      # Class that connect to endpoints related to projects
+      class Repository
+        extend Backend::ConnectionHelper
+
+        # Returns the build id for a repository
+        # @return [String]
+        def self.build_id(project_name, repository_name, architecture)
+          response = http_get(['/build/:project/:repository/:architecture', project_name, repository_name, architecture], params: { view: 'status' })
+          Xmlhash.parse(response).value('buildid')
+        end
+      end
+    end
+  end
+end

src/api/spec/models/repository_architecture_spec.rb

@@ -0,0 +1,25 @@
+require 'rails_helper'
+
+RSpec.describe RepositoryArchitecture do
+  describe '.build_id' do
+    let(:repository_architecture) { create(:repository_architecture) }
+    let(:repository) { repository_architecture.repository }
+    let(:project) { repository.project.name }
+    let(:architecture) { repository_architecture.architecture.name }
+
+    let(:good_response) { '<status code="finished"><buildid>1</buildid></status>' }
+    let(:busy_response) { '<status code="building"/>' }
+
+    subject { repository_architecture.build_id }
+
+    it 'fetches from backend' do
+      stub_request(:get, "#{CONFIG['source_url']}/build/#{project}/#{repository.name}/#{architecture}?view=status").and_return(body: good_response)
+      expect(subject).to eq('1')
+    end
+
+    it 'does not crash' do
+      stub_request(:get, "#{CONFIG['source_url']}/build/#{project}/#{repository.name}/#{architecture}?view=status").and_return(body: busy_response)
+      expect(subject).to be_nil
+    end
+  end
+end