charts_pattern_controller.rb

module Api
  module V1
    class ChartsPatternController < ApplicationController
      skip_before_action :authenticate_user!, only: [:index]

      def index
        offset = charts_pattern_params[:offset].to_i
        start_at = (charts_pattern_params[:start_at].to_date - offset.days).to_s

        end_date = charts_pattern_params[:end_at].to_date
        end_at = (Time.current.to_date == end_date ? end_date : (end_date + offset.days)).to_s

        @patterns = Pattern.where(id: {'$in': charts_pattern_params[:pattern_ids] || []})

        @extended_patterns = @patterns.map do |pattern|
          pattern.extend(PatternExtender).form_chart_data(start_at: start_at,
            end_at: end_at,
            pattern: pattern)
        end

        render json: @extended_patterns, meta: {color_ids: Flaredown::Colorable::IDS}
      end

      private

      def charts_pattern_params
        params.permit(:start_at, :end_at, :offset, pattern_ids: [])
      end
    end
  end
end