lib/hooloo/mozart_hash.rb
class Hooloo::MozartHash
class << self
def field_mapping(fields)
fields = [fields] unless fields.is_a? Array
fields.map do |field|
if field.is_a?(Hash)
arr = field.to_a[0]
[arr[0], arr[1].to_s]
else
[field, field.to_s]
end
end
end
def date(*mappings)
field_mapping(mappings).each do |field, mapping|
define_method(field) { Date.iso8601(@obj[mapping.to_s]) }
end
end
def bool(*mappings)
field_mapping(mappings).each do |field, mapping|
define_method(field.to_s + '?') { @obj[mapping] }
end
end
def uri(*mappings)
field_mapping(mappings).each do |field, mapping|
define_method(field.to_s) { URI @obj[mapping.to_s] }
end
end
def float(*mappings)
field_mapping(mappings).each do |field, mapping|
define_method(field.to_s) { @obj[mapping.to_s].to_f }
end
end
def cast(klass, mappings, opts={map_array: true, map: false})
field_mapping(mappings).each do |field, mapping|
define_method(field) do
if opts[:map] || (@obj[mapping].is_a?(Array) && opts[:map_array])
@obj[mapping].map { |x| klass.new(x) }
else
klass.new @obj[mapping]
end
end
end
end
private :field_mapping
end
def initialize(o)
@obj = o
end
# Honestly, we should generate methods when we initially parse the Hash
# instead of doing this crap in method_missing. I'll do that later.
def method_missing(method, *args, &block)
@obj[method.to_s] or super
end
def respond_to?(method)
@obj.has_key? method.to_s or super
end
def inspect
"#<%s:%014x>" % [self.class.name, object_id]
end
end