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require 'yaml'
class IdStore
def initialize(fileName=nil)
if fileName
raise "Base directory does not exist: #{File.dirname(fileName)}" \
unless File.exist?(File.dirname(fileName))
@idsFileName = fileName
end
@idHash = nil
end
def idHash
load unless @idHash
@idHash
end
def load
if @idsFileName && File.exist?(@idsFileName)
@idHash = YAML.load_file(@idsFileName) || {}
else
@idHash = {}
end
end
def store
return unless @idsFileName
File.open(@idsFileName,"w") do |f|
YAML.dump(@idHash, f)
end
end
end
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