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module Foreman
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module Parameters
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class Caster
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attr_reader :value
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def initialize(item, options = {})
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defaults = {
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:attribute_name => :value,
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:to => :string
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}
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options.reverse_merge!(defaults)
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@item, @options = item, options
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@value = @options[:value] || @item.send(@options[:attribute_name])
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end
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def cast!
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@item.send("#{@options[:attribute_name]}=", casted_value)
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end
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def cast
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casted_value
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end
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private
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def casted_value
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case @options[:to].to_s
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when "string"
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cast_string
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when "integer"
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cast_integer
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when "real"
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cast_real
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when "boolean"
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cast_boolean
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when "array"
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cast_array
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when "hash"
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cast_hash
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when "json"
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cast_json
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when "yaml"
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cast_yaml
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when nil, ""
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value
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else
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Rails.logger.warn("Unable to type cast #{value} to #{@options[:to]}")
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raise TypeError
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end
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end
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def cast_string
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value.to_s
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end
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def cast_boolean
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val = Foreman::Cast.to_bool(value)
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return val if [true, false].include?(val)
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raise TypeError
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end
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def cast_integer
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return value.to_i if value.is_a?(Numeric)
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if value.is_a?(String)
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if value =~ /^0x[0-9a-f]+$/i
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value.to_i(16)
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elsif value =~ /^0[0-7]+$/
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value.to_i(8)
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elsif value =~ /^-?\d+$/
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value.to_i
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else
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raise TypeError
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end
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end
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end
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def cast_real
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return value if value.is_a? Numeric
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if value.is_a?(String)
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if value =~ /\A[-+]?(?:\d+(?:\.\d*)?|\.\d+)(?:[eE][-+]?\d+)?\Z/
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value.to_f
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else
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cast_value_integer value
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end
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end
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end
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def cast_array
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return value if value.is_a? Array
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return value.to_a if not value.is_a? String and value.is_a? Enumerable
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val = load_yaml_or_json
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raise TypeError unless val.is_a? Array
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val
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end
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def cast_hash
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return value if value.is_a? Hash
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val = load_yaml_or_json
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raise TypeError unless val.is_a? Hash
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val
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end
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def cast_json
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JSON.load value
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end
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def cast_yaml
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YAML.load value
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end
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def load_yaml_or_json
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return value unless value.is_a? String
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begin
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JSON.load value
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rescue
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YAML.load value
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end
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end
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end
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end
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end
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