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# frozen_string_literal: true
module Decidim
module ContentParsers
# A parser that searches user mentions in content.
#
# A word starting with `@` will be considered as a possible mention if
# they only contains letters, numbers or underscores.
#
# @see BaseParser Examples of how to use a content parser
class UserParser < BaseParser
# Class used as a container for metadata
#
# @!attribute users
# @return [Array] an array of Decidim::User mentioned in content
Metadata = Struct.new(:users)
# Matches a nickname if contains letters, numbers or underscores.
MENTION_REGEX = /\B@(\w*)\b/
# Replaces found mentions matching a nickname of an existing
# user in the current organization with a global id. Other
# mentions found that doesn't match an existing user are
# returned as is.
#
# @return [String] the content with the valid mentions replaced by a global id
def rewrite
content.gsub(MENTION_REGEX) do |match|
users[match[1..-1].downcase]&.to_global_id&.to_s || match
end
end
# (see BaseParser#metadata)
def metadata
Metadata.new(existing_users)
end
private
def users
@users ||=
existing_users.index_by(&:nickname)
end
def existing_users
@existing_users ||= Decidim::User.where("decidim_organization_id = ? AND LOWER(nickname) IN (?)", current_organization.id, content_nicknames)
end
def content_nicknames
@content_nicknames ||= content.scan(MENTION_REGEX).flatten.uniq.map!(&:downcase)
end
def current_organization
@current_organization ||= context[:current_organization]
end
end
end
end
Version data entries
12 entries across 12 versions & 1 rubygems