Class: TimeZoneConverter::JsonDataTransformer

Inherits:
Object
  • Object
show all
Defined in:
lib/time_zone_converter/json_data_transformer.rb

Constant Summary collapse

DATA_PATH = 
'data/cities'

Instance Method Summary collapse

Constructor Details

#initialize(path: DATA_PATH) ⇒ JsonDataTransformer

Returns a new instance of JsonDataTransformer.



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# File 'lib/time_zone_converter/json_data_transformer.rb', line 8

def initialize(path: DATA_PATH)
  @path = path
end

Instance Method Details

#call ⇒ Object 



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# File 'lib/time_zone_converter/json_data_transformer.rb', line 12

def call
  json_new = Hash.new { |hash, key| hash[key] = {} }

  Dir["#{@path}/*.json"].each do |json_file|
    json = JSON.parse(File.read(json_file))
    json.each do |item|
      data = item.last

      next unless data.is_a? Hash

      accentcity = data['accentcity']

      if json_new[accentcity].present?
        puts "#{accentcity} already exists."
        population = data['population']
        population_to_i = population.to_i || 0

        previous_population_to_i = json_new[accentcity].try(:last).to_i || 0

        if previous_population_to_i < population_to_i
          puts "Overriding #{accentcity}."
          puts "Population was #{previous_population_to_i}."
          puts "Population is #{population_to_i}."
          # sleep 0.1

          json_new[accentcity] = [
            data['latitude'],
            data['longitude'],
            population
          ]
        end
      else
        puts "#{accentcity} will be created."

        json_new[accentcity] = [
          data['latitude'],
          data['longitude'],
          data['population']
        ]
      end

      # sleep 0.05
    end
  end

  puts "Storing #{json_new.keys.count} cities."

  File.open("#{@path}/cities.json", "w") do |f|
    f.write(json_new.to_json)
  end
end