Gestionnaire can invite an email contact to participate at a dossier

app/validators/email_format_validator.rb

@@ -0,0 +1,11 @@
+class EmailFormatValidator < ActiveModel::Validator
+
+  def email_regex
+    /\A([^@\s]+)@((?:[-a-z0-9]+\.)+[a-z]{2,})\z/i
+  end
+
+  def validate(record)
+    return if record.email.blank?
+    record.errors[:base] << "Email invalide" unless email_regex.match(record.email)
+  end
+end