[Fix #1479] Create a sanitize email concern

app/models/concerns/email_sanitizable_concern.rb

@@ -0,0 +1,10 @@
+module EmailSanitizableConcern
+  extend ActiveSupport::Concern
+
+  def sanitize_email(attribute)
+    value_to_sanitize = self.send(attribute)
+    if value_to_sanitize.present?
+      self[attribute] = value_to_sanitize.gsub(/[[:space:]]/, ' ').strip.downcase
+    end
+  end
+end

spec/models/concern/email_sanitizable_concern_spec.rb

@@ -0,0 +1,51 @@
+describe EmailSanitizableConcern, type: :model do
+  describe 'sanitize_email' do
+    let(:email_concern) do
+      (Class.new do
+         include EmailSanitizableConcern
+         attr_accessor :email
+
+         def initialize(email)
+           self.email = email
+         end
+
+         def [](key)
+           self.send(key)
+         end
+
+         def []=(key, value)
+           self.send("#{key}=", value)
+         end
+       end).new(email)
+    end
+
+    before do
+      email_concern.sanitize_email(:email)
+    end
+
+    context 'on an empty email' do
+      let(:email) { '' }
+      it { expect(email_concern.email).to eq('') }
+    end
+
+    context 'on a valid email' do
+      let(:email) { 'michel@toto.fr' }
+      it { expect(email_concern.email).to eq('michel@toto.fr') }
+    end
+
+    context 'on an email with trailing spaces' do
+      let(:email) { ' michel@toto.fr    ' }
+      it { expect(email_concern.email).to eq('michel@toto.fr') }
+    end
+
+    context 'on an email with trailing nbsp' do
+      let(:email) { ' michel@toto.fr  ' }
+      it { expect(email_concern.email).to eq('michel@toto.fr') }
+    end
+
+    context 'on an invalid email' do
+      let(:email) { 'mich el@toto.fr' }
+      it { expect(email_concern.email).to eq('mich el@toto.fr') }
+    end
+  end
+end