Model concerns organization into module namespaces (#28149)

app/models/concerns/user/ldap_authenticable.rb

@@ -0,0 +1,60 @@
+# frozen_string_literal: true
+
+module User::LdapAuthenticable
+  extend ActiveSupport::Concern
+
+  class_methods do
+    def authenticate_with_ldap(params = {})
+      ldap   = Net::LDAP.new(ldap_options)
+      filter = format(Devise.ldap_search_filter, uid: Devise.ldap_uid, mail: Devise.ldap_mail, email: Net::LDAP::Filter.escape(params[:email]))
+
+      if (user_info = ldap.bind_as(base: Devise.ldap_base, filter: filter, password: params[:password]))
+        ldap_get_user(user_info.first)
+      end
+    end
+
+    def ldap_get_user(attributes = {})
+      safe_username = attributes[Devise.ldap_uid.to_sym].first
+
+      if Devise.ldap_uid_conversion_enabled
+        keys = Regexp.union(Devise.ldap_uid_conversion_search.chars)
+        replacement = Devise.ldap_uid_conversion_replace
+        safe_username = safe_username.gsub(keys, replacement)
+      end
+
+      resource = joins(:account).find_by(accounts: { username: safe_username })
+
+      if resource.blank?
+        resource = new(email: attributes[Devise.ldap_mail.to_sym].first, agreement: true, account_attributes: { username: safe_username }, admin: false, external: true, confirmed_at: Time.now.utc)
+        resource.save!
+      end
+
+      resource
+    end
+
+    def ldap_options
+      opts = {
+        host: Devise.ldap_host,
+        port: Devise.ldap_port,
+        base: Devise.ldap_base,
+
+        auth: {
+          method: :simple,
+          username: Devise.ldap_bind_dn,
+          password: Devise.ldap_password,
+        },
+
+        connect_timeout: 10,
+      }
+
+      if [:simple_tls, :start_tls].include?(Devise.ldap_method)
+        opts[:encryption] = {
+          method: Devise.ldap_method,
+          tls_options: OpenSSL::SSL::SSLContext::DEFAULT_PARAMS.tap { |options| options[:verify_mode] = OpenSSL::SSL::VERIFY_NONE if Devise.ldap_tls_no_verify },
+        }
+      end
+
+      opts
+    end
+  end
+end