dawarich/app/controllers/points_controller.rb

class PointsController < ApplicationController
  before_action :authenticate_user!

  def index
    @points = Point.where('timestamp >= ? AND timestamp <= ?', start_at, end_at).order(timestamp: :asc)

    @countries_and_cities = CountriesAndCities.new(@points).call
    @coordinates =
      @points.pluck(:latitude, :longitude, :battery, :altitude, :timestamp, :velocity, :id)
             .map { [_1.to_f, _2.to_f, _3.to_s, _4.to_s, _5.to_s, _6.to_s, _7] }
    @distance = distance
    @start_at = Time.zone.at(start_at)
    @end_at = Time.zone.at(end_at)
    @years = (@start_at.year..@end_at.year).to_a
  end

  private

  def start_at
    return 1.month.ago.beginning_of_day.to_i if params[:start_at].nil?

    Time.zone.parse(params[:start_at]).to_i
  end

  def end_at
    return Time.zone.today.end_of_day.to_i if params[:end_at].nil?

    Time.zone.parse(params[:end_at]).to_i
  end

  def distance
    @distance ||= 0

    @coordinates.each_cons(2) do
      @distance += Geocoder::Calculations.distance_between([_1[0], _1[1]], [_2[0], _2[1]], units: :km)
    end

    @distance.round(1)
  end
end