1require 'faraday'
  
2require 'postcode_sanitizer'
  
3
  
4class Constituency < ActiveRecord::Base
  
5  class ApiClient
  
6    HOST = 'http://data.parliament.uk'
  
7    ENDPOINT = '/membersdataplatform/services/mnis/Constituencies/%{postcode}/'
  
8    TIMEOUT = 5
  
 9
  
10    def call(postcode)
  
11      faraday.get(path(postcode)) do |request|
  
12        request.options[:timeout] = TIMEOUT
  
13        request.options[:open_timeout] = TIMEOUT
  
14      end
  
15    end
  
16
  
17    private
  
18
  
19    def faraday
  
20      @faraday ||= Faraday.new(HOST) do |f|
  
21        f.response :follow_redirects
  
22        f.response :raise_error
  
23        f.adapter  :net_http_persistent
  
24      end
  
25    end
  
26
  
27    def path(postcode)
  
28      ENDPOINT % { postcode: escape_path(postcode) }
  
29    end
  
30
  
31    def escape_path(value)
  
32      Rack::Utils.escape_path(sanitize(value))
  
33    end
  
34
  
35    def sanitize(value)
  
36      PostcodeSanitizer.call(value)
  
37    end
  
38  end
  
39end