discourse/lib/guardian.rb

315 lines
7.4 KiB
Ruby

require_dependency 'guardian/category_guardian'
require_dependency 'guardian/ensure_magic'
require_dependency 'guardian/post_guardian'
require_dependency 'guardian/topic_guardian'
require_dependency 'guardian/user_guardian'
require_dependency 'guardian/post_revision_guardian'
require_dependency 'guardian/group_guardian'
# The guardian is responsible for confirming access to various site resources and operations
class Guardian
include EnsureMagic
include CategoryGuardian
include PostGuardian
include TopicGuardian
include UserGuardian
include PostRevisionGuardian
include GroupGuardian
class AnonymousUser
def blank?; true; end
def admin?; false; end
def staff?; false; end
def moderator?; false; end
def approved?; false; end
def secure_category_ids; []; end
def topic_create_allowed_category_ids; []; end
def has_trust_level?(level); false; end
def email; nil; end
end
attr_accessor :can_see_emails
def initialize(user=nil)
@user = user.presence || AnonymousUser.new
end
def user
@user.presence
end
alias :current_user :user
def anonymous?
!authenticated?
end
def authenticated?
@user.present?
end
def is_admin?
@user.admin?
end
def is_staff?
@user.staff?
end
def is_moderator?
@user.moderator?
end
def is_developer?
@user &&
is_admin? &&
(Rails.env.development? ||
(
Rails.configuration.respond_to?(:developer_emails) &&
Rails.configuration.developer_emails.include?(@user.email)
)
)
end
# Can the user see the object?
def can_see?(obj)
if obj
see_method = method_name_for :see, obj
return (see_method ? send(see_method, obj) : true)
end
end
def can_create?(klass, parent=nil)
return false unless authenticated? && klass
# If no parent is provided, we look for a can_create_klass?
# custom method.
#
# If a parent is provided, we look for a method called
# can_create_klass_on_parent?
target = klass.name.underscore
if parent.present?
return false unless can_see?(parent)
target << "_on_#{parent.class.name.underscore}"
end
create_method = :"can_create_#{target}?"
return send(create_method, parent) if respond_to?(create_method)
true
end
# Can the user edit the obj
def can_edit?(obj)
can_do?(:edit, obj)
end
# Can we delete the object
def can_delete?(obj)
can_do?(:delete, obj)
end
def can_moderate?(obj)
obj && authenticated? && (is_staff? || (obj.is_a?(Topic) && @user.has_trust_level?(TrustLevel[4])))
end
alias :can_move_posts? :can_moderate?
alias :can_see_flags? :can_moderate?
alias :can_send_activation_email? :can_moderate?
alias :can_close? :can_moderate?
def can_grant_badges?(_user)
SiteSetting.enable_badges && is_staff?
end
def can_see_group?(group)
group.present? && (is_admin? || group.visible?)
end
# Can we impersonate this user?
def can_impersonate?(target)
target &&
# You must be an admin to impersonate
is_admin? &&
# You may not impersonate other admins unless you are a dev
(!target.admin? || is_developer?)
# Additionally, you may not impersonate yourself;
# but the two tests for different admin statuses
# make it impossible to be the same user.
end
# Can we approve it?
def can_approve?(target)
is_staff? && target && not(target.approved?)
end
def can_activate?(target)
is_staff? && target && not(target.active?)
end
def can_suspend?(user)
user && is_staff? && user.regular?
end
alias :can_deactivate? :can_suspend?
def can_revoke_admin?(admin)
can_administer_user?(admin) && admin.admin?
end
def can_grant_admin?(user)
can_administer_user?(user) && not(user.admin?)
end
def can_revoke_moderation?(moderator)
can_administer?(moderator) && moderator.moderator?
end
def can_grant_moderation?(user)
can_administer?(user) && not(user.moderator?)
end
def can_grant_title?(user)
user && is_staff?
end
def can_change_primary_group?(user)
user && is_staff?
end
def can_change_trust_level?(user)
user && is_staff?
end
# Support sites that have to approve users
def can_access_forum?
return true unless SiteSetting.must_approve_users?
return false unless @user
# Staff can't lock themselves out of a site
return true if is_staff?
@user.approved?
end
def can_see_invite_details?(user)
is_me?(user)
end
def can_invite_to_forum?(groups=nil)
authenticated? &&
(SiteSetting.max_invites_per_day.to_i > 0 || is_staff?) &&
!SiteSetting.enable_sso &&
SiteSetting.enable_local_logins &&
(
(!SiteSetting.must_approve_users? && @user.has_trust_level?(TrustLevel[2])) ||
is_staff?
) &&
(groups.blank? || is_admin?)
end
def can_invite_to?(object, group_ids=nil)
return false if ! authenticated?
return false unless ( SiteSetting.enable_local_logins && (!SiteSetting.must_approve_users? || is_staff?) )
return true if is_admin?
return false if (SiteSetting.max_invites_per_day.to_i == 0 && !is_staff?)
return false if ! can_see?(object)
return false if group_ids.present?
if object.is_a?(Topic) && object.category
if object.category.groups.any?
return true if object.category.groups.all? { |g| can_edit_group?(g) }
end
end
user.has_trust_level?(TrustLevel[2])
end
def can_bulk_invite_to_forum?(user)
user.admin?
end
def can_create_disposable_invite?(user)
user.admin?
end
def can_send_multiple_invites?(user)
user.staff?
end
def can_see_private_messages?(user_id)
is_admin? || (authenticated? && @user.id == user_id)
end
def can_send_private_message?(target)
(target.is_a?(Group) || target.is_a?(User)) &&
# User is authenticated
authenticated? &&
# Can't send message to yourself
is_not_me?(target) &&
# Have to be a basic level at least
@user.has_trust_level?(SiteSetting.min_trust_to_send_messages) &&
# PMs are enabled
(SiteSetting.enable_private_messages ||
@user.username == SiteSetting.site_contact_username ||
@user == Discourse.system_user) &&
# Can't send PMs to suspended users
(is_staff? || target.is_a?(Group) || !target.suspended?)
end
def can_see_emails?
@can_see_emails
end
def can_export_entity?(entity_type)
return true if is_staff?
return false if entity_type == "admin"
UserExport.where(user_id: @user.id, created_at: (Time.zone.now.beginning_of_day..Time.zone.now.end_of_day)).count == 0
end
private
def is_my_own?(obj)
unless anonymous?
return obj.user_id == @user.id if obj.respond_to?(:user_id) && obj.user_id && @user.id
return obj.user == @user if obj.respond_to?(:user)
end
false
end
def is_me?(other)
other && authenticated? && other.is_a?(User) && @user == other
end
def is_not_me?(other)
@user.blank? || !is_me?(other)
end
def can_administer?(obj)
is_admin? && obj.present?
end
def can_administer_user?(other_user)
can_administer?(other_user) && is_not_me?(other_user)
end
def method_name_for(action, obj)
method_name = :"can_#{action}_#{obj.class.name.underscore}?"
return method_name if respond_to?(method_name)
end
def can_do?(action, obj)
if obj && authenticated?
action_method = method_name_for action, obj
return (action_method ? send(action_method, obj) : true)
else
false
end
end
end