Class: Chartnado::Renderer

Inherits:
Object
  • Object
show all
Includes:
Series
Defined in:
lib/chartnado/renderer.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from Series

#median, #series_product, #series_ratio, #series_sum

Constructor Details

#initialize(context, data_block, &render_block) ⇒ Renderer

Returns a new instance of Renderer.



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# File 'lib/chartnado/renderer.rb', line 6

def initialize(context, data_block, &render_block)
  @context = context
  @data_block = data_block
  @render_block = render_block
end

Instance Attribute Details

#context ⇒ Object

Returns the value of attribute context.



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# File 'lib/chartnado/renderer.rb', line 4

def context
  @context
end

#data_block ⇒ Object

Returns the value of attribute data_block.



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# File 'lib/chartnado/renderer.rb', line 4

def data_block
  @data_block
end

#render_block ⇒ Object

Returns the value of attribute render_block.



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# File 'lib/chartnado/renderer.rb', line 4

def render_block
  @render_block
end

Instance Method Details

#chart_json(series, show_total: false, reverse_sort: false, percentage: false) ⇒ Object 



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# File 'lib/chartnado/renderer.rb', line 49

def chart_json(series, show_total: false, reverse_sort: false, percentage: false)
  series = Chartnado::Series::Wrap[series]
  series *= 100.0 if percentage
  if series.has_separate_named_series?
    series = series.to_a
    if series.first.second.respond_to?(:map)
      totals = Hash.new(0.0)
      new_series = series.sort_by { |item| item.first.to_s }
      new_series = new_series.reverse if reverse_sort

      new_series = new_series.map do |name, data|
        {
          name: name,
          data: data.map do |k, v|
            totals[k] += v if show_total
            [k, v]
          end
        }
      end

      if show_total
        [{name: 'Total',
          data: totals.map { |k, v| [k, 0] },
          tooltip: totals.map { |k, v| [k, v] }
         }] + new_series
      else
        new_series
      end
    else
      new_series = series.sort_by { |item| item.first.to_s }
      new_series = new_series.reverse if reverse_sort

      if show_total
        new_series << ['Total', new_series.map(&:second).reduce(0, :+)]
      else
        new_series
      end
    end
  elsif series.hash?
    if (key = series.keys.first) and key.is_a?(Array) and key.size == 2
      totals = Hash.new(0.0)
      new_series = series.group_by { |k, v| k[0] }.sort_by { |k| k.to_s }
      new_series = new_series.reverse if reverse_sort

      new_series = new_series.map do |name, data|
        {
          name: name,
          data: data.map do |k, v|
            totals[k[1]] += v if show_total
            [k[1], v]
          end
        }
      end

      if show_total
        [{name: 'Total',
          data: totals.map { |k, v| [k, 0] },
          tooltip: totals.map { |k, v| [k, v] }
         }] + new_series
      else
        new_series
      end
    else
      new_series = series.sort_by { |key| key.to_s }
      new_series = new_series.reverse if reverse_sort

      if show_total
        new_series << ['Total', new_series.map(&:second).reduce(0, :+)]
      else
        new_series
      end
    end
  elsif series.respond_to?(:map)
    series
  else
    [['Total', series]]
  end
end

#render(*args, **options) ⇒ Object 



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# File 'lib/chartnado/renderer.rb', line 14

def render(*args, ** options)
  json_options = {}
  chartkick_options = options.dup

  if args.length > 1
    if args.last.is_a?(Hash)
      json_options = chartkick_options
      chartkick_options = args[1].dup
    end
    args.select { |arg| arg.is_a?(Symbol) }.each do |key|
      json_options[key] = true unless json_options.has_key?(key)
    end
  end

  if json_options[:percentage]
    chartkick_options.reverse_merge!(max: 100.0)
  end

  options = controller.chartnado_options if controller.respond_to?(:chartnado_options)
  options ||= {}

  chart_json_proc = -> (*args) {
    chart_json(Chartnado.with_chartnado_dsl(&data_block), *args)
  }
  renderer = -> {
    context.instance_exec(chartkick_options, json_options, chart_json_proc, &render_block)
  }

  if options[:wrapper_proc]
    context.instance_exec(*args, renderer, ** options, &options[:wrapper_proc])
  else
    renderer.call
  end
end