Add LDAP user index

app/controllers/ldap_users_controller.rb

@@ -0,0 +1,36 @@
+class LdapUsersController < ApplicationController
+  def index
+    attributes = %w{dn cn uid mail admin}
+    filter = Net::LDAP::Filter.eq("uid", "*")
+    if params[:ou]
+      treebase = "ou=#{params[:ou]},cn=users,dc=kosmos,dc=org"
+    else
+      treebase = "ou=kosmos.org,cn=users,dc=kosmos,dc=org"
+    end
+
+    entries = ldap_client.search(base: treebase, filter: filter, attributes: attributes)
+    entries.sort_by! { |e| e.cn[0] }
+
+    @entries = entries.collect do |e|
+      {
+        uid: e.uid.first,
+        mail: e.try(:mail) ? e.mail.first : nil,
+        admin: e.try(:admin) ? 'admin' : nil
+      }
+    end
+    # ldap_client.get_operation_result
+  end
+
+  private
+
+  def ldap_client
+    ldap_client ||= Net::LDAP.new host: "ldap.kosmos.org",
+      port: 636,
+      encryption: :simple_tls,
+      auth: {
+        method: :simple,
+        username: Rails.application.credentials.ldap[:username],
+        password: Rails.application.credentials.ldap[:password]
+      }
+  end
+end