dirty commit: can't get references to work correctly between any tables

app/presenters/dashboard/gauge_presenter.rb

@@ -0,0 +1,70 @@
+# frozen_string_literal: true
+
+module Dashboard
+  class GaugePresenter
+    def initialize(zones:, score:)
+      @zones = zones
+      @score = score&.round(2)
+    end
+
+    def title
+      zone.type.to_s.titleize
+    end
+
+    def color_class
+      "fill-#{zone.type}"
+    end
+
+    def score_percentage
+      percentage_for @score
+    end
+
+    def key_benchmark_percentage
+      percentage_for @zones.approval_zone.low_benchmark
+    end
+
+    def boundary_percentage_for(zone)
+      case zone
+      when :watch_low
+        watch_low_boundary
+      when :growth_low
+        growth_low_boundary
+      when :ideal_low
+        ideal_low_boundary
+      end
+    end
+
+    attr_reader :score
+
+    private
+
+    def watch_low_boundary
+      percentage_for @zones.watch_zone.low_benchmark
+    end
+
+    def growth_low_boundary
+      percentage_for @zones.growth_zone.low_benchmark
+    end
+
+    def approval_low_boundary
+      percentage_for @zones.approval_zone.low_benchmark
+    end
+
+    def ideal_low_boundary
+      percentage_for @zones.ideal_zone.low_benchmark
+    end
+
+    def zone
+      @zones.zone_for_score(@score)
+    end
+
+    def percentage_for(number)
+      return nil if number.nil?
+
+      zones_minimum = @zones.warning_zone.low_benchmark
+      zones_maximum = @zones.ideal_zone.high_benchmark
+
+      (number - zones_minimum) / (zones_maximum - zones_minimum)
+    end
+  end
+end