discourse/lib/guardian/category_guardian.rb

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# frozen_string_literal: true
#mixin for all guardian methods dealing with category permisions
module CategoryGuardian
# Creating Method
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def can_create_category?(parent = nil)
is_admin? ||
(
SiteSetting.moderators_create_categories &&
is_moderator?
)
end
# Editing Method
def can_edit_category?(category)
is_admin? ||
(
SiteSetting.moderators_create_categories &&
is_moderator? &&
can_see_category?(category)
)
end
def can_delete_category?(category)
can_edit_category?(category) &&
category.topic_count <= 0 &&
!category.uncategorized? &&
!category.has_children?
end
def cannot_delete_category_reason(category)
return I18n.t('category.cannot_delete.uncategorized') if category.uncategorized?
return I18n.t('category.cannot_delete.has_subcategories') if category.has_children?
if category.topic_count != 0
oldest_topic = category.topics.where.not(id: category.topic_id).order('created_at ASC').limit(1).first
if oldest_topic
return I18n.t('category.cannot_delete.topic_exists', count: category.topic_count, topic_link: "<a href=\"#{oldest_topic.url}\">#{CGI.escapeHTML(oldest_topic.title)}</a>")
else
# This is a weird case, probably indicating a bug.
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return I18n.t('category.cannot_delete.topic_exists_no_oldest', count: category.topic_count)
end
end
nil
end
def can_see_category?(category)
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return false unless category
return true if is_admin?
return true if !category.read_restricted
return true if is_staged? && category.email_in.present? && category.email_in_allow_strangers
secure_category_ids.include?(category.id)
end
def secure_category_ids
@secure_category_ids ||= @user.secure_category_ids
end
# all allowed category ids
def allowed_category_ids
@allowed_category_ids ||=
begin
unrestricted = Category.where(read_restricted: false).pluck(:id)
unrestricted.concat(secure_category_ids)
end
end
def topic_create_allowed_category_ids
@topic_create_allowed_category_ids ||= @user.topic_create_allowed_category_ids
end
def topic_featured_link_allowed_category_ids
@topic_featured_link_allowed_category_ids = Category.where(topic_featured_link_allowed: true).pluck(:id)
end
end