doc-lumber-smart-chart-time-based

1 format

// The value MUST be formatted like this.
{
  value: [{
    label: <string> ,
    values: { value: <number> }
  }, {
    label: <string> ,
    values: { value: <number> }
  }, …]
}

2 config-routes.rb

# /config/routes.rb
Rails.application.routes.draw do
  # MUST be declared before the mount ForestLiana::Engine.
  namespace :forest do
    post '/stats/charges-per-day' => 'charts#charges_per_day'
  end
  
  mount ForestLiana::Engine => '/forest'
end

3 app-controllers-forest-charts_controller.rb

# /app/controllers/forest/charts_controller.rb
class Forest::ChartsController < ForestLiana::ApplicationController
  def charges_per_day
    values = []

    from = Date.parse('2018-03-01').to_time(:utc).to_i
    to = Date.parse('2018-03-31').to_time(:utc).to_i

    Stripe::Charge.list({ 
      created: { gte: from, lte: to }, 
      limit: 100 
    }).each do |charge|
      date = Time.at(charge.created).beginning_of_day.strftime("%d/%m/%Y")
      entry = values.find { |e| e[:label] == date }
      if !entry
        values << { label: date, values: { value: 1 } }
      else
        ++entry[:values][:value]
      end
    end

    stat = ForestLiana::Model::Stat.new({ value: values })
    render json: serialize_model(stat)
  end
end