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Versions: 27
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Contents
module Picky
module Backends
class Prepared
# Index data dumped in the text format.
#
class Text
include Helpers::File
attr_reader :cache_path
def initialize cache_path, options = {}
@cache_path = "#{cache_path}.prepared.#{extension}"
end
# Uses the extension "txt".
#
def extension
:txt
end
# The initial content before loading.
#
def initial
raise "Can't have an initial content from text file. Use JSON or Marshal."
end
# Text files are used exclusively for
# prepared data files.
#
def load
raise "Can't load from text file. Use JSON or Marshal."
end
# Text files are used exclusively for
# prepared data files.
#
def dump hash
raise "Can't dump to text file. Use JSON or Marshal."
end
# Retrieves prepared index data in the form
# * id,data\n
# * id,data\n
# * id,data\n
#
# Yields an id string and a token.
#
# TODO Think about the comma - what if you have commas in the id? Use CSV?
#
def retrieve
id = nil
token = nil
::File.open(cache_path, 'r:utf-8') do |file|
file.each_line do |line|
id, token = line.split ?,, 2
yield id.freeze, (token.chomp! || token).freeze
end
end
end
#
#
def open &block
create_directory cache_path
::File.open cache_path, 'w:utf-8', &block
end
end
end
end
end
Version data entries
27 entries across 27 versions & 1 rubygems