Apply consistent date validation on the server (using v8) (#124)

* Apply consistent date validation on the server (using v8)

* Variable fix

* added specs to verify date/time field validation

* minor text change

Co-authored-by: Faizaan Gagan <fzngagan@gmail.com>

lib/custom_wizard/validators/update.rb

@@ -52,7 +52,7 @@ class ::CustomWizard::UpdateValidator
       @updater.errors.add(field_id, I18n.t('wizard.field.invalid_file', label: label, types: file_types))
     end
 
-    if ['date', 'date_time'].include?(type) && value.present? && !validate_date(value)
+    if ['date', 'date_time'].include?(type) && value.present? && !validate_date(value, format)
       @updater.errors.add(field_id, I18n.t('wizard.field.invalid_date'))
     end
 
@@ -88,13 +88,8 @@ class ::CustomWizard::UpdateValidator
       .include?(File.extname(value['original_filename'])[1..-1])
   end
 
-  def validate_date(value)
-    begin
-      Date.parse(value)
-      true
-    rescue ArgumentError
-      false
-    end
+  def validate_date(value, format)
+    v8.eval("moment('#{value}', '#{format}', true).isValid()")
   end
 
   def validate_time(value)
@@ -126,4 +121,12 @@ class ::CustomWizard::UpdateValidator
   def standardise_boolean(value)
     ActiveRecord::Type::Boolean.new.cast(value)
   end
+
+  def v8
+    return @ctx if @ctx
+
+    @ctx = PrettyText.v8
+    PrettyText.ctx_load(@ctx, "#{Rails.root}/vendor/assets/javascripts/moment.js")
+    @ctx
+  end
 end

spec/components/custom_wizard/update_validator_spec.rb

@@ -132,4 +132,44 @@ describe CustomWizard::UpdateValidator do
       updater.errors.messages[:step_2_field_6].first
     ).to eq(nil)
   end
+
+  it 'validates date fields' do
+    @template[:steps][1][:fields][0][:format] = "DD-MM-YYYY"
+    CustomWizard::Template.save(@template)
+
+    updater = perform_validation('step_2', step_2_field_1: '13-11-2021')
+    expect(
+      updater.errors.messages[:step_2_field_1].first
+    ).to eq(nil)
+  end
+
+  it 'doesn\'t validate date field if the format is not respected' do
+    @template[:steps][1][:fields][0][:format] = "MM-DD-YYYY"
+    CustomWizard::Template.save(@template)
+
+    updater = perform_validation('step_2', step_2_field_1: '13-11-2021')
+    expect(
+      updater.errors.messages[:step_2_field_1].first
+    ).to eq(I18n.t('wizard.field.invalid_date'))
+  end
+
+  it 'validates date time fields' do
+    @template[:steps][1][:fields][2][:format] = "DD-MM-YYYY HH:mm:ss"
+    CustomWizard::Template.save(@template)
+
+    updater = perform_validation('step_2', step_2_field_3: '13-11-2021 09:15:00')
+    expect(
+      updater.errors.messages[:step_2_field_3].first
+    ).to eq(nil)
+  end
+
+  it 'doesn\'t validate date time field if the format is not respected' do
+    @template[:steps][1][:fields][2][:format] = "MM-DD-YYYY HH:mm:ss"
+    CustomWizard::Template.save(@template)
+
+    updater = perform_validation('step_2', step_2_field_3: '13-11-2021 09:15')
+    expect(
+      updater.errors.messages[:step_2_field_3].first
+    ).to eq(I18n.t('wizard.field.invalid_date'))
+  end
 end