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# frozen_string_literal: true
module Gitlab
# Parses link header.
#
# @private
class PageLinks
HEADER_LINK = 'Link'
DELIM_LINKS = ','
LINK_REGEX = /<([^>]+)>; rel="([^"]+)"/.freeze
METAS = %w[last next first prev].freeze
attr_accessor(*METAS)
def initialize(headers)
link_header = headers[HEADER_LINK]
extract_links(link_header) if link_header && link_header =~ /(next|first|last|prev)/
end
private
def extract_links(header)
header.split(DELIM_LINKS).each do |link|
LINK_REGEX.match(link.strip) do |match|
url = match[1]
meta = match[2]
next if !url || !meta || METAS.index(meta).nil?
send("#{meta}=", url)
end
end
end
end
end
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