Class: TickingAway::WorldTime

Inherits:
Object
  • Object
show all
Defined in:
lib/ticking_away/world_time.rb

Overview

Class to get time from the World Time Api or another Api with the same spec

Constant Summary collapse

UNKNOWN_LOCATION_RESPONSE = 
{
  'error' => 'unknown location'
}.freeze

Class Method Summary collapse

Class Method Details

.call_api(request_url) ⇒ Object 



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# File 'lib/ticking_away/world_time.rb', line 21

def call_api(request_url)
  HTTParty.get(request_url)
rescue => e
  raise TickingAway::Errors::TimeTravelIsHard, e.message
end

.handle_response(response, request_url) ⇒ Object 



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# File 'lib/ticking_away/world_time.rb', line 27

def handle_response(response, request_url)
  # Convert JSON response to Hash, handling an empty or nil body
  parsed_response = parse_response(response.body)

  case response.code
  when 200
    raise TickingAway::Errors::UnrecognizedTimeZone, 'Error: non-time response' unless parsed_response.is_a?(Hash)

    puts "Event: Retreived current time for #{parsed_response['timezone']}: #{parsed_response['datetime']}"
  when 404
    # Differentiate between an unknown location response and a random 404 by checking the response body
    if parsed_response.eql?(UNKNOWN_LOCATION_RESPONSE)
      raise TickingAway::Errors::UnrecognizedTimeZone, "Error: Unrecognized Time Zone #{request_url}"
    end

    raise TickingAway::Errors::TimeTravelIsHard, "Error: 404 response for #{request_url}"
  else
    raise TickingAway::Errors::TimeTravelIsHard, "Error: #{response.code} #{parsed_response}"
  end

  # Convert the time from a RFC3339 formatted string to a Time object
  Time.parse(parsed_response['datetime'])
end

.parse_response(body) ⇒ Object 



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# File 'lib/ticking_away/world_time.rb', line 51

def parse_response(body)
  JSON.parse(body)
rescue => e
  raise TickingAway::Errors::TimeTravelIsHard, e.message
end

.time_at(base_url, tz_info) ⇒ Object 



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# File 'lib/ticking_away/world_time.rb', line 14

def time_at(base_url, tz_info)
  request_url = "#{base_url}/timezone/#{tz_info}"

  response = call_api(request_url)
  handle_response(response, request_url)
end