fix: adjust formatting of dial total value

CHANGELOG.md

@@ -1,3 +1,8 @@
+## 1.3.7
+
+* Adjust value of Dial total_value so that it does not show
+zero for a value that is less than 0.1
+
 ## 1.3.6
 
 * Correct filenames for the habitat country CSVs - must be plural.

app/helpers/countries_helper.rb

@@ -43,10 +43,6 @@ def protected_percentage(dataset)
     end
   end
 
-  def total_value(dataset)
-    @country.protection_stats[dataset[:id]] ? @country.protection_stats[dataset[:id]]['total_value'].round(1) : 0
-  end
-
   def habitat_with_data
     @red_list_data.find { |habitat| habitat['data'].present? }
   end

app/helpers/proportion_protected_helper.rb

@@ -1,12 +1,11 @@
 module ProportionProtectedHelper
   def global_proportion_protected_html(dataset)
+    total_value = habitat_protection(dataset[:id])['total_value']
+
     t('shared.proportion_protected.card.percentage',
       percentage: habitat_protection(dataset[:id])['protected_percentage'],
-      area: number_with_delimiter(
-        habitat_protection(dataset[:id])['total_value'], 
-        delimiter: ','
-      )
-    ).html_safe
+      area: total_value_formatted(total_value),
+      area_unrounded: number_with_delimiter(total_value, delimiter: ',')).html_safe
   end
 
   def country_proportion_protected_status_html(dataset)
@@ -20,10 +19,12 @@ def country_proportion_protected_status_html(dataset)
   end
 
   def country_proportion_protected_html(dataset)
+    total_value = @country.protection_stats[dataset[:id]] ? @country.protection_stats[dataset[:id]]['total_value'] : 0
+
     t('shared.proportion_protected.card.percentage',
       percentage: protected_percentage(dataset),
-      area: number_with_delimiter(total_value(dataset), delimiter: ',')
-    ).html_safe
+      area: total_value_formatted(total_value),
+      area_unrounded: number_with_delimiter(total_value, delimiter: ',')).html_safe
   end
 
   def proportion_protected_percentage(dataset)
@@ -37,4 +38,14 @@ def proportion_protected_icon_class(dataset)
   def proportion_protected_card_modifier(dataset)
     current_page?('/') ? 'present' : dataset_status(dataset)
   end
-end
+
+  def total_value_formatted(value)
+    if value.zero?
+      0
+    elsif value < 0.1
+      format('%.2e', value)
+    else
+      number_with_delimiter(value.round(1), delimiter: ',')
+    end
+  end
+end

config/locales/shared/proportion_protected/en.yml

@@ -10,4 +10,4 @@ en:
       note: '<strong>Note:</strong> This outlines the proportion of each habitat that is known to occur within protected areas. However, the level of protection and whether or not these habitats are explicitly and effectively protected is unknown.'
       last_updated: '<strong>Last updated:</strong> %{last_updated}'
       card:
-        percentage: '<strong>%{percentage}%</strong> of %{area} km<sup>2</sup>'
+        percentage: '<strong>%{percentage}%</strong> of <span title="%{area_unrounded}">%{area}</span> km<sup>2</sup>'