class Lastfm::Util
Public Class Methods
build_options(args, mandatory, optional)
click to toggle source
# File lib/lastfm/util.rb, line 7 def self.build_options(args, mandatory, optional) if args.first.is_a?(Hash) build_options_from_hash(args.first, mandatory || [], optional || []) else build_options_from_array(args, mandatory || [], optional || []) end end
build_options_from_array(values, mandatory, optional)
click to toggle source
# File lib/lastfm/util.rb, line 33 def self.build_options_from_array(values, mandatory, optional) options = {} mandatory.each_with_index do |name, index| raise ArgumentError.new('%s is required' % name) unless values[index] options[name] = values[index] end optional.each_with_index do |name, index| value = name[1] if value.kind_of?(Proc) value = value.call end options[name[0]] = values[index + mandatory.size] || value end options end
build_options_from_hash(options, mandatory, optional)
click to toggle source
# File lib/lastfm/util.rb, line 15 def self.build_options_from_hash(options, mandatory, optional) candidates = mandatory.kind_of?(AnyParams) ? mandatory.candidates : [mandatory] candidates.each do |params| missing_param = Array(params).any? { |param| !options.key?(param) } if missing_param && params.equal?(candidates.last) raise ArgumentError.new("%s is required" % candidates.map{ |c| Array(c).join(', ')}.join(' or ')) end break unless missing_param end optional.each do |name, value| options[name] ||= value.kind_of?(Proc) ? value.call : value end options end
force_array(array_or_something)
click to toggle source
# File lib/lastfm/util.rb, line 3 def self.force_array(array_or_something) array_or_something.kind_of?(Array) ? array_or_something : [array_or_something].compact end