Module: GoogleVisualr::ParamHelpers

Included in:
BaseChart, DataTable::Cell, Formatter
Defined in:
lib/google_visualr/param_helpers.rb

Instance Method Summary collapse

Instance Method Details

#js_parameters(options) ⇒ Object


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# File 'lib/google_visualr/param_helpers.rb', line 12

def js_parameters(options)
  return "" if options.nil?

  attributes = options.collect { |(key, value)| "#{key}: #{typecast(value)}" }
  "{" + attributes.join(", ") + "}"
end

#stringify_keys!(options) ⇒ Object


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# File 'lib/google_visualr/param_helpers.rb', line 5

def stringify_keys!(options)
  options.keys.each do |key|
    options[key.to_s] = options.delete(key)
  end
  options
end

#typecast(value, type = nil) ⇒ Object

If the column type is 'string' , the value should be a string. If the column type is 'number' , the value should be a number. If the column type is 'boolean' , the value should be a boolean. If the column type is 'date' , the value should be a Date object. If the column type is 'datetime' , the value should be a DateTime or Time object. If the column type is 'timeofday' , the value should be an array of three or four numbers: [hour, minute, second, optional milliseconds]. Returns an array of strings if given an array Returns 'null' when value is nil. Recursive typecasting when value is a hash.


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# File 'lib/google_visualr/param_helpers.rb', line 28

def typecast(value, type = nil)
  case
    when value.is_a?(String)
      return value.to_json
    when value.is_a?(Integer)   || value.is_a?(Float)
      return value
    when value.is_a?(TrueClass) || value.is_a?(FalseClass)
      return "#{value}"
    when value.is_a?(DateTime)  ||  value.is_a?(Time)
      if type == "time"
        return "new Date(0, 0, 0, #{value.hour}, #{value.min}, #{value.sec})"
      else
        return "new Date(#{value.year}, #{value.month-1}, #{value.day}, #{value.hour}, #{value.min}, #{value.sec})"
      end
    when value.is_a?(Date)
      return "new Date(#{value.year}, #{value.month-1}, #{value.day})"
    when value.nil?
      return "null"
    when value.is_a?(Array)
      return "[" + value.map{|v| typecast(v) }.join(',') + "]"
    when value.is_a?(Hash)
      return js_parameters(value)
    else
      return value
  end
end