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# frozen_string_literal: true
module RuboCop
module Cop
# Cop that avoid direct manipulation of ActiveModel#errors hash,
# in preparation to upgrade to Rails 6.1
#
# See https://gitlab.com/gitlab-org/gitlab/-/issues/225874
class ActiveModelErrorsDirectManipulation < RuboCop::Cop::Base
MSG = 'Avoid manipulating errors hash directly. For more details check https://gitlab.com/gitlab-org/gitlab/-/issues/225874'
MANIPULATIVE_METHODS = ":<< :append :clear :collect! :compact! :concat :delete :delete_at :delete_if :drop :drop_while :fill :filter! :keep_if :flatten! :insert :map! :pop :prepend :push :reject! :replace :reverse! :rotate! :select! :shift :shuffle! :slice! :sort! :sort_by! :uniq! :unshift"
def_node_matcher :active_model_errors_root_manipulation?, <<~PATTERN
(send
(send
(send {send ivar lvar} :errors)
:[]
...)
{#{MANIPULATIVE_METHODS}}
...)
PATTERN
def_node_matcher :active_model_errors_root_assignment?, <<~PATTERN
(send
(send {send ivar lvar} :errors)
:[]=
...)
PATTERN
def_node_matcher :active_model_errors_manipulation?, <<~PATTERN
(send
(send
(send
(send {send ivar lvar} :errors)
{:messages :details})
:[]
...)
{#{MANIPULATIVE_METHODS}}
...)
PATTERN
def_node_matcher :active_model_errors_assignment?, <<~PATTERN
(send
(send
(send {send ivar lvar} :errors)
{:messages :details})
:[]=
...)
PATTERN
def on_send(node)
add_offense(node) if active_model_errors_root_assignment?(node)
add_offense(node) if active_model_errors_root_manipulation?(node)
add_offense(node) if active_model_errors_manipulation?(node)
add_offense(node) if active_model_errors_assignment?(node)
end
end
end
end
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