Rubocop

app/models/form.rb

@@ -1,31 +1,30 @@
 class Form
-
-  attr_reader :form_definition, :all_sections, :all_subsections, :all_pages
+  attr_reader :form_definition
 
   def initialize(start_year, end_year)
     form_json = "config/forms/#{start_year}_#{end_year}.json"
     raise "No form definition file exists for given year".freeze unless File.exist?(form_json)
 
-    @form_definition = JSON.load(File.new(form_json))
+    @form_definition = JSON.parse(File.open(form_json).read)
   end
 
   # Returns a hash with sections as keys
   def all_sections
-    @sections ||= @form_definition["sections"]
+    @all_sections ||= @form_definition["sections"]
   end
 
   # Returns a hash with subsections as keys
   def all_subsections
-    @subsections ||= all_sections.map do |section_key, section_value|
+    @all_subsections ||= all_sections.map { |_section_key, section_value|
       section_value["subsections"]
-    end.reduce(:merge)
+    }.reduce(:merge)
   end
 
   # Returns a hash with pages as keys
   def all_pages
-    @all_pages ||= all_subsections.map do |subsection_key, subsection_value|
+    @all_pages ||= all_subsections.map { |_subsection_key, subsection_value|
       subsection_value["pages"]
-    end.reduce(:merge)
+    }.reduce(:merge)
   end
 
   # Returns a hash with the pages as keys
@@ -38,9 +37,9 @@ class Form
   end
 
   def subsection_for_page(page)
-    all_subsections.find do |subsection_key, subsection_value|
-      subsection_value["pages"].keys.include?(page)
-    end.first
+    all_subsections.find { |_subsection_key, subsection_value|
+      subsection_value["pages"].key?(page)
+    }.first
   end
 
   def next_page(previous_page)
@@ -52,7 +51,7 @@ class Form
   def previous_page(current_page)
     subsection = subsection_for_page(current_page)
     current_page_idx = pages_for_subsection(subsection).keys.index(current_page)
-    return unless current_page_idx > 0
+    return unless current_page_idx.positive?
 
     pages_for_subsection(subsection).keys[current_page_idx - 1]
   end