CAPT-2081 Lower email address max length to 129

app/forms/email_address_form.rb

@@ -12,8 +12,8 @@ class EmailAddressForm < Form
       message: ->(form, _) { form.i18n_errors_path("format") }
     },
     length: {
-      maximum: 256,
-      message: ->(form, _) { form.i18n_errors_path("length") }
+      maximum: Rails.application.config.email_max_length,
+      message: ->(form, _) { form.i18n_errors_path("length", length: Rails.application.config.email_max_length) }
     },
     if: -> { email_address.present? }
 

app/forms/reminders/personal_details_form.rb

@@ -24,8 +24,8 @@ class PersonalDetailsForm < Form
         message: i18n_error_message("email_address.invalid")
       },
       length: {
-        maximum: 256,
-        message: i18n_error_message("email_address.length")
+        maximum: Rails.application.config.email_max_length,
+        message: i18n_error_message("email_address.length", length: Rails.application.config.email_max_length)
       }
 
     def save!

app/forms/select_email_form.rb

@@ -6,7 +6,7 @@ class SelectEmailForm < Form
   validates :email_address_check, inclusion: {in: [true, false], message: i18n_error_message(:select_email)}
   validates :email_address, presence: {message: i18n_error_message(:invalid_email)}, if: -> { email_address_check == true }
   validates :email_address, format: {with: Rails.application.config.email_regexp, message: i18n_error_message(:invalid_email)},
-    length: {maximum: 256, message: i18n_error_message(:invalid_email)}, if: -> { email_address.present? }
+    length: {maximum: Rails.application.config.email_max_length, message: i18n_error_message(:invalid_email)}, if: -> { email_address.present? }
 
   before_validation :determine_dependant_attributes
 

app/models/eligible_fe_provider.rb

@@ -4,7 +4,7 @@ class EligibleFeProvider < ApplicationRecord
   validates :primary_key_contact_email_address,
     presence: true,
     format: {with: Rails.application.config.email_regexp},
-    length: {maximum: 256}
+    length: {maximum: Rails.application.config.email_max_length}
 
   def self.csv_for_academic_year(academic_year)
     attribute_names = [:ukprn, :max_award_amount, :lower_award_amount, :primary_key_contact_email_address]

config/application.rb

@@ -74,6 +74,10 @@ class Application < Rails::Application
 
     config.email_regexp = /\A[a-zA-Z0-9.!\#$%&'*+\/=?^_`{|}~-]+@[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?(?:\.[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)+\z/
 
+    # Max length is based on the lowest requirement on services Claim interacts, in this case Payroll
+    # https://www.gov.uk/government/publications/real-time-information-internet-submissions-2024-to-2025-technical-specifications
+    config.email_max_length = 129
+
     config.active_support.to_time_preserves_timezone = :offset
   end
 end

config/locales/en.yml

@@ -275,7 +275,7 @@ en:
       errors:
         presence: "Enter an email address"
         format: "Enter an email address in the correct format, like [email protected]"
-        length: "Email address must be 256 characters or less"
+        length: "Email address must be %{length} characters or less"
     mobile_number:
       errors:
         invalid: "Enter a mobile number, like 07700 900 982 or +44 7700 900 982"
@@ -586,7 +586,7 @@ en:
           email_address:
             blank: Enter an email address
             invalid: Enter an email address in the correct format, like [email protected]
-            length: Email address must be 256 characters or less
+            length: Email address must be %{length} characters or less
             unauthorised: Only authorised email addresses can be used when using a team-only API key
     check_your_answers:
       part_one:

spec/forms/email_address_form_spec.rb

@@ -29,15 +29,28 @@
     describe "validations" do
       subject { form }
 
+      let(:domain) { "@example.com" }
+
       describe "email_address" do
         context "when missing" do
           let(:email_address) { nil }
           it { is_expected.not_to be_valid }
         end
 
         context "when too long" do
-          let(:email_address) { "a" * 257 }
-          it { is_expected.not_to be_valid }
+          let(:email_address) { "#{"a" * (130 - domain.length)}#{domain}" }
+          it do
+            subject.valid?
+
+            expect(form).not_to be_valid
+            expect(form.errors.added?(:email_address, :too_long, count: 129)).to be true
+            expect(form.errors.messages[:email_address]).to include("Email address must be 129 characters or less")
+          end
+        end
+
+        context "when as long as it can get" do
+          let(:email_address) { "#{"a" * (129 - domain.length)}#{domain}" }
+          it { is_expected.to be_valid }
         end
 
         context "when the wrong format" do

spec/forms/reminders/personal_details_form_spec.rb

@@ -8,12 +8,13 @@
   let(:journey) { Journeys::FurtherEducationPayments }
   let(:journey_session) { create(:further_education_payments_session) }
   let(:claim) { create(:claim, :submitted) }
+  let(:params) { ActionController::Parameters.new }
 
   subject do
     described_class.new(
       journey_session:,
       journey:,
-      params: ActionController::Parameters.new,
+      params: params,
       session: {"submitted_claim_id" => claim.id}
     )
   end
@@ -40,4 +41,61 @@
       end
     end
   end
+
+  describe "validations" do
+    let(:domain) { "@example.com" }
+
+    let(:params) do
+      ActionController::Parameters.new(claim: {reminder_email_address: email_address})
+    end
+
+    before do
+      subject.valid?
+    end
+
+    describe "email_address" do
+      context "when missing" do
+        let(:email_address) { nil }
+
+        it do
+          expect(subject).not_to be_valid
+          expect(subject.errors.added?(:reminder_email_address, :blank)).to be true
+        end
+      end
+
+      context "when too long" do
+        let(:email_address) { "#{"a" * (130 - domain.length)}#{domain}" }
+
+        it do
+          expect(subject).not_to be_valid
+          expect(subject.errors.added?(:reminder_email_address, :too_long, count: 129)).to be true
+          expect(subject.errors.messages[:reminder_email_address]).to include("Email address must be 129 characters or less")
+        end
+      end
+
+      context "when as long as it can get" do
+        let(:email_address) { "#{"a" * (129 - domain.length)}#{domain}" }
+
+        it do
+          expect(subject.errors.added?(:reminder_email_address, :too_long, count: 129)).to be false
+        end
+      end
+
+      context "when the wrong format" do
+        let(:email_address) { "not_an_email" }
+
+        it do
+          expect(subject.errors.added?(:reminder_email_address, :invalid, value: "not_an_email")).to be true
+        end
+      end
+
+      context "when the correct format" do
+        let(:email_address) { "[email protected]" }
+
+        it do
+          expect(subject.errors.added?(:reminder_email_address, :invalid, value: "not_an_email")).to be false
+        end
+      end
+    end
+  end
 end

spec/forms/select_email_form_spec.rb

@@ -66,7 +66,7 @@ def stub_email(email)
         is_expected.to be_invalid
         expect(form.errors[:email_address]).to eq([form.i18n_errors_path(:invalid_email)])
 
-        stub_email("a" * 245 + "@example.com") # 257 chars
+        stub_email("a" * (130 - 12) + "@example.com")
         is_expected.to be_invalid
         expect(form.errors[:email_address]).to eq([form.i18n_errors_path(:invalid_email)])
       end