today_ai_weather/app/controllers/cities_controller.rb

class CitiesController < ApplicationController
  def index
    @regions = Region.includes(:countries).order(:name)
    @cities = City.includes(:country, country: :region).order(:name)

    if params[:region]
      @current_region = Region.friendly.find(params[:region])
      @cities = @cities.by_region(@current_region.id)
    end

    if params[:country]
      @current_country = Country.friendly.find(params[:country])
      @cities = @cities.by_country(@current_country.id)
    end

    @cities = @cities.page(params[:page]).per(10)

    set_meta_tags(
      title: @current_region ? "Cities in #{@current_region.name}" : "Explore Cities",
      description: "Discover weather art for cities #{@current_region ? "in #{@current_region.name}" : 'worldwide'}. Real-time AI-generated weather visualization.",
      keywords: "#{@current_region&.name}, cities, weather art, AI visualization"
    )
  end

  def show
    @city = City.friendly.find(params[:id])
    ahoy.track "View City", {
      city_id: @city.id,
      name: @city.name,
      event_type: "city_view"
    }

    set_meta_tags(
      title: @city.name,
      description: "Experience #{@city.name}'s weather through AI-generated art. Daily updates of weather conditions visualized through artificial intelligence.",
      keywords: "#{@city.name}, #{@city.country.name}, weather art, AI visualization",
      og: {
        image: @city.latest_weather_art&.image&.attached? ? url_for(@city.latest_weather_art.image) : nil
      }
    )
  end
end