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# frozen_string_literal: true
module Decidim
# This class encapsulates an action, which will be used by the
# permissions system to check if the user is allowed to perform it.
#
# It consists of a `scope` (which will typically be either `:public` or
# `:admin`), the name of the `:action` that is being performed and the
# `:subject` of the action.
class PermissionAction
# action - a Symbol representing the action being performed
# scope - a Symbol representing the scope of the action
# subject - a Symbol representing the subject of the action
def initialize(action:, scope:, subject:)
@action = action
@scope = scope
@subject = subject
@state = nil
@backtrace = []
end
attr_reader :action, :scope, :subject, :backtrace
def allow!
raise PermissionCannotBeDisallowedError, "Allowing a previously disallowed action is not permitted: #{inspect}" if @state == :disallowed
@state = :allowed
end
def disallow!
@state = :disallowed
end
def allowed?
raise PermissionNotSetError, "Permission has not been allowed or disallowed yet: #{inspect}" if @state.blank?
@state == :allowed
end
def trace(class_name, state)
@backtrace << [class_name, state]
end
# Checks if this PermissionAction specifies the same +scope+, +action+ and
# +subject+ thant the ones provided as arguments.
def matches?(scope, action, subject)
same = (self.action == action)
same &&= (self.scope == scope)
same &&= (self.subject == subject)
same
end
def to_s
"!#{self.class.name}<action: #{action}, scope: #{scope}, subject: #{subject}, state: #{@state}>"
end
class PermissionNotSetError < StandardError; end
class PermissionCannotBeDisallowedError < StandardError; end
end
end
Version data entries
13 entries across 13 versions & 1 rubygems