feat: Service which calculates data for EP.2 chart

app/models/ascor/assessment.rb

@@ -19,4 +19,6 @@ class ASCOR::Assessment < ApplicationRecord
   validates_presence_of :assessment_date
 
   accepts_nested_attributes_for :results, allow_destroy: true
+
+  scope :currently_published, -> { where('ascor_assessments.publication_date <= ?', DateTime.now) }
 end

app/models/ascor/benchmark.rb

@@ -22,4 +22,6 @@ class ASCOR::Benchmark < ApplicationRecord
   validates :emissions_metric, inclusion: {in: ASCOR::EmissionsMetric::VALUES}, allow_nil: true
   validates :emissions_boundary, inclusion: {in: ASCOR::EmissionsBoundary::VALUES}, allow_nil: true
   validates :benchmark_type, inclusion: {in: ASCOR::BenchmarkType::VALUES}, allow_nil: true
+
+  scope :currently_published, -> { where('ascor_benchmarks.publication_date <= ?', DateTime.now) }
 end

app/models/ascor/pathway.rb

@@ -30,4 +30,6 @@ class ASCOR::Pathway < ApplicationRecord
   validates_presence_of :emissions_metric, :emissions_boundary, :units, :assessment_date
   validates :emissions_metric, inclusion: {in: ASCOR::EmissionsMetric::VALUES}, allow_nil: true
   validates :emissions_boundary, inclusion: {in: ASCOR::EmissionsBoundary::VALUES}, allow_nil: true
+
+  scope :currently_published, -> { where('ascor_pathways.publication_date <= ?', DateTime.now) }
 end

app/services/api/ascor/benchmarks_chart.rb

@@ -0,0 +1,45 @@
+module Api
+  module ASCOR
+    class BenchmarksChart
+      attr_accessor :assessment_date, :country_id
+
+      def initialize(assessment_date, country_id)
+        @assessment_date = assessment_date
+        @country_id = country_id
+      end
+
+      def call
+        {data: collect_data, metadata: collect_metadata}
+      end
+
+      private
+
+      def collect_data
+        {
+          emissions: pathway&.emissions || {},
+          last_historical_year: pathway&.last_historical_year,
+          benchmarks: benchmarks.map do |benchmark|
+            {benchmark_type: benchmark.benchmark_type, emissions: benchmark.emissions}
+          end
+        }
+      end
+
+      def collect_metadata
+        {unit: benchmarks.first&.units}
+      end
+
+      def pathway
+        @pathway ||= ::ASCOR::Pathway.where(
+          country_id: country_id,
+          emissions_metric: benchmarks.first&.emissions_metric,
+          emissions_boundary: benchmarks.first&.emissions_boundary,
+          assessment_date: assessment_date
+        ).first
+      end
+
+      def benchmarks
+        @benchmarks ||= ::ASCOR::Benchmark.where(country_id: country_id)
+      end
+    end
+  end
+end

app/views/tpi/ascor/_assessment.html.erb

@@ -23,6 +23,9 @@
         <div class="country-assessment__indicators" for="<%= dom_id(area) %>">
           <% if ascor_sub_indicators_for(area, indicators).present? %>
             <%= render 'tpi/ascor/assessment_indicators', area: area, indicators: ascor_sub_indicators_for(area, indicators), metrics: metrics %>
+            <% if area.code == 'EP.2' %>
+              <%= render 'tpi/ascor/benchmarks_chart' %>
+            <% end %>
           <% else %>
             <%= render 'tpi/ascor/assessment_metrics', metrics: ascor_sub_indicators_for(area, metrics) %>
           <% end %>

app/views/tpi/ascor/_benchmarks_chart.html.erb

@@ -0,0 +1,3 @@
+<%#= react_component('charts/ascor-benchmarks', { # TODO: Finalise react component
+  data: Api::ASCOR::BenchmarksChart.new(@assessment_date, @country.id).call
+}) %>

app/views/tpi/ascor/show.html.erb

@@ -40,7 +40,7 @@
   <% end %>
 
   <div class="container notes">
-    <% if @assessment.notes.present? %>
+    <% if @assessment&.notes.present? %>
       <h6>Research notes:</h6>
       <p>
         <%= @assessment.notes %>

spec/services/api/ascor/benchmarks_chart_spec.rb

@@ -0,0 +1,37 @@
+require 'rails_helper'
+
+RSpec.describe Api::ASCOR::BenchmarksChart do
+  subject { described_class.new(assessment_date, country_id).call }
+
+  before_all do
+    @country = create :ascor_country
+
+    create :ascor_pathway,
+           country: @country,
+           assessment_date: Date.new(2019, 2, 1),
+           emissions_metric: 'Absolute',
+           emissions_boundary: 'Production - excluding LULUCF',
+           emissions: {2013 => 130, 2014 => 130, 2015 => 130}
+    create :ascor_benchmark,
+           country: @country,
+           emissions_metric: 'Absolute',
+           emissions_boundary: 'Production - excluding LULUCF',
+           emissions: {2015 => 10, 2016 => 11, 2017 => 12}
+  end
+
+  let(:assessment_date) { Date.new(2019, 2, 1) }
+  let(:country_id) { @country.id }
+
+  it 'returns expected result' do
+    expect(subject).to eq(
+      data: {
+        emissions: {'2013' => 130, '2014' => 130, '2015' => 130},
+        last_historical_year: 2010,
+        benchmarks: [
+          {benchmark_type: 'National 1.5C benchmark', emissions: {'2015' => 10, '2016' => 11, '2017' => 12}}
+        ]
+      },
+      metadata: {unit: 'MtCO2e'}
+    )
+  end
+end