This gist checks you into your most recent Foursquare location from the Reporter iOS app, if you aren't already checked in there. To read more, see http://verifyandrepair.com/02-26-2016/using-reporter-foursquare/

foursquare_reporter.rb

#!/usr/bin/env ruby
# Use Reporter as a Foursquare Client
# Assumes your Reports contain these two questions:
# "What are you doing?" and
# "Where are you?"

require 'time'
require 'json'
require 'net/http'

# To prevent encoding errors on OSX
if RUBY_VERSION =~ /2.*.*/
  Encoding.default_external = Encoding::UTF_8
  Encoding.default_internal = Encoding::UTF_8
end

# Set Variables - Path to Dropbox; Foursquare token; script variables
filepath = "/Users/USERNAME/Dropbox/Apps/Reporter-App/"
token = "FOURSQUARE_API_TOKEN"
new_checkin = false
id = ''

# Get the current file and parse it
datepath = Time.now.strftime("%Y-%m-%d")
file = File.open(filepath+datepath+"-reporter-export.json", encoding: 'UTF-8')
json = file.read
data = JSON.parse(json)


# Grab the data - default answers for sleep and wake, user input for everything else
imp = data["snapshots"][-1]["reportImpetus"].to_i
if imp == 3
  act = "Heading to bed"
elsif imp == 4
  act = "Waking up"
else
  data["snapshots"][-1]["responses"].each do |response|
  lat = data["snapshots"][-1]["location"]["latitude"]
  long = data["snapshots"][-1]["location"]["longitude"]
  ll = "#{lat},#{long}"
    if response["questionPrompt"] =~ /doing/
      act = response["tokens"][0]["text"]
    elsif response["questionPrompt"] =~ /Where/ && response["locationResponse"] != nil
      location = response["locationResponse"]["text"]
      url = URI.parse("https://api.foursquare.com/v2/users/self/checkins?limit=1&oauth_token=" + token + "&v=20140823")
      buffer = Net::HTTP.get(url)
      checkins = JSON.parse(buffer)
      place = checkins["response"]["checkins"]["items"][0]["venue"]["name"]
      if place == location
        puts "You're already here!"
      elsif place != location
        venueURI = URI.escape("https://api.foursquare.com/v2/venues/search?oauth_token=#{token}&ll=#{ll}&query=#{location}&limit=1&v=20140823")
        venueURI = URI.parse(venueURI)
        res = Net::HTTP.get(venueURI)
        venues = JSON.parse(res)
        id = venues["response"]["venues"][0]["id"]
        new_checkin = true
      end
    end
  end
end

if new_checkin == true
  uri = URI('https://api.foursquare.com/v2/checkins/add?')
  http = Net::HTTP.new(uri.host, uri.port)
  http.use_ssl = true
  http.verify_mode = OpenSSL::SSL::VERIFY_PEER

  data = {
    "venueId" => "#{id}",
    "shout" => "#{act}",
    "oauth_token" => "#{token}",
    "v" => "20160222",
    "broadcast" => "private",
  }
  body = URI.encode_www_form(data)

  req =  Net::HTTP::Post.new(uri)
  req.add_field "Content-Type", "application/x-www-form-urlencoded"
  req.body = body
  res = http.request(req)
end