16387: Allow setting is_active=false only on LoginCluster users.
[arvados.git] / services / api / app / models / user.rb
index a49aa6f56a22ead2398198401c15be2a8860ec97..c3641b64e84f04217145edacab05ac8d84f259a7 100644 (file)
@@ -21,6 +21,7 @@ class User < ArvadosModel
             },
             uniqueness: true,
             allow_nil: true)
+  validate :must_unsetup_to_deactivate
   before_update :prevent_privilege_escalation
   before_update :prevent_inactive_admin
   before_update :verify_repositories_empty, :if => Proc.new { |user|
@@ -187,18 +188,20 @@ class User < ArvadosModel
   end
 
   # create links
-  def setup(openid_prefix:, repo_name: nil, vm_uuid: nil)
-    oid_login_perm = create_oid_login_perm openid_prefix
+  def setup(repo_name: nil, vm_uuid: nil)
     repo_perm = create_user_repo_link repo_name
     vm_login_perm = create_vm_login_permission_link(vm_uuid, username) if vm_uuid
     group_perm = create_user_group_link
 
-    return [oid_login_perm, repo_perm, vm_login_perm, group_perm, self].compact
+    return [repo_perm, vm_login_perm, group_perm, self].compact
   end
 
   # delete user signatures, login, repo, and vm perms, and mark as inactive
   def unsetup
     # delete oid_login_perms for this user
+    #
+    # note: these permission links are obsolete, they have no effect
+    # on anything and they are not created for new users.
     Link.where(tail_uuid: self.email,
                      link_class: 'permission',
                      name: 'can_login').destroy_all
@@ -234,6 +237,43 @@ class User < ArvadosModel
     self.save!
   end
 
+  def must_unsetup_to_deactivate
+    if !self.new_record? &&
+       self.uuid[0..4] == Rails.configuration.Login.LoginCluster &&
+       self.uuid[0..4] != Rails.configuration.ClusterID
+      # OK to update our local record to whatever the LoginCluster
+      # reports, because self-activate is not allowed.
+      return
+    elsif self.is_active_changed? &&
+       self.is_active_was &&
+       !self.is_active
+
+      group = Group.where(name: 'All users').select do |g|
+        g[:uuid].match(/-f+$/)
+      end.first
+
+      # When a user is set up, they are added to the "All users"
+      # group.  A user that is part of the "All users" group is
+      # allowed to self-activate.
+      #
+      # It doesn't make sense to deactivate a user (set is_active =
+      # false) without first removing them from the "All users" group,
+      # because they would be able to immediately reactivate
+      # themselves.
+      #
+      # The 'unsetup' method removes the user from the "All users"
+      # group (and also sets is_active = false) so send a message
+      # explaining the correct way to deactivate a user.
+      #
+      if Link.where(tail_uuid: self.uuid,
+                    head_uuid: group[:uuid],
+                    link_class: 'permission',
+                    name: 'can_read').any?
+        errors.add :is_active, "cannot be set to false directly, use the 'Deactivate' button on Workbench, or the 'unsetup' API call"
+      end
+    end
+  end
+
   def set_initial_username(requested: false)
     if !requested.is_a?(String) || requested.empty?
       email_parts = email.partition("@")
@@ -376,10 +416,12 @@ class User < ArvadosModel
     user = self
     redirects = 0
     while (uuid = user.redirect_to_user_uuid)
-      user = User.unscoped.find_by_uuid(uuid)
-      if !user
-        raise Exception.new("user uuid #{user.uuid} redirects to nonexistent uuid #{uuid}")
+      break if uuid.empty?
+      nextuser = User.unscoped.find_by_uuid(uuid)
+      if !nextuser
+        raise Exception.new("user uuid #{user.uuid} redirects to nonexistent uuid '#{uuid}'")
       end
+      user = nextuser
       redirects += 1
       if redirects > 15
         raise "Starting from #{self.uuid} redirect_to_user_uuid exceeded maximum number of redirects"
@@ -577,30 +619,6 @@ class User < ArvadosModel
     merged
   end
 
-  def create_oid_login_perm(openid_prefix)
-    # Check oid_login_perm
-    oid_login_perms = Link.where(tail_uuid: self.email,
-                                 head_uuid: self.uuid,
-                                 link_class: 'permission',
-                                 name: 'can_login')
-
-    if !oid_login_perms.any?
-      # create openid login permission
-      oid_login_perm = Link.create!(link_class: 'permission',
-                                   name: 'can_login',
-                                   tail_uuid: self.email,
-                                   head_uuid: self.uuid,
-                                   properties: {
-                                     "identity_url_prefix" => openid_prefix,
-                                   })
-      logger.info { "openid login permission: " + oid_login_perm[:uuid] }
-    else
-      oid_login_perm = oid_login_perms.first
-    end
-
-    return oid_login_perm
-  end
-
   def create_user_repo_link(repo_name)
     # repo_name is optional
     if not repo_name
@@ -682,13 +700,13 @@ class User < ArvadosModel
   def setup_on_activate
     return if [system_user_uuid, anonymous_user_uuid].include?(self.uuid)
     if is_active && (new_record? || is_active_changed?)
-      setup(openid_prefix: Rails.configuration.default_openid_prefix)
+      setup
     end
   end
 
   # Automatically setup new user during creation
   def auto_setup_new_user
-    setup(openid_prefix: Rails.configuration.default_openid_prefix)
+    setup
     if username
       create_vm_login_permission_link(Rails.configuration.Users.AutoSetupNewUsersWithVmUUID,
                                       username)