Simple command line tool to either show your next event and location or open the hangout for your next meeting.

_whats_next.rb

require 'time'
require 'uri'
require 'net/http'
require 'net/https'
require "json"

CLIENT_ID = "google client id"
CLIENT_SECRET = "google client secret"

# Use the bash script to generate a refreh token
REFRESH_TOKEN = "refresh id"

# This is your email or a specific calendar ID
CALENDAR_ID = "some id" 

def request(method, url, auth=true, body=nil)
  uri = URI.parse(url)
  https = Net::HTTP.new(uri.host, uri.port)
  https.use_ssl = true
  https.verify_mode = OpenSSL::SSL::VERIFY_NONE

  request = method.new(uri)

  if body
    request.body = URI.encode_www_form(body)
  end

  if auth
    request["Authorization"] = "Bearer #{access_token}"
  end


  JSON.parse(https.request(request).body)
end

def access_token
  result = request(Net::HTTP::Post, "https://www.googleapis.com/oauth2/v4/token", false, {
    "client_id" => CLIENT_ID,
    "client_secret" => CLIENT_SECRET,
    "refresh_token" => REFRESH_TOKEN,
    "grant_type" => "refresh_token"
  })

  if result["access_token"]
    result["access_token"]
  else
    raise "Client id, secret, or refresh token is wrong."
  end
end

def get_next_event_for_calendar(id)
  result = request(Net::HTTP::Get, "https://www.googleapis.com/calendar/v3/calendars/#{id}/events?timeMin=#{Time.now.to_datetime.rfc3339}")
  result["items"].last
end

next_event = get_next_event_for_calendar(CALENDAR_ID)

if ARGV[0] == "h" || ARGV[0] == "hangout"
  `open #{next_event["hangoutLink"]}`
else
  puts "#{next_event["summary"]} | #{next_event["location"]}"
end

get_refresh_token.sh

client_id=YOUR-CLIENT-SECRET
client_secret=YOUR-CLIENT-ID

result=$(curl -s "https://accounts.google.com/o/oauth2/device/code" \
  -d "client_id=$client_id" \
  -d "scope=https://www.googleapis.com/auth/calendar.readonly")

user_code=$(echo $result | sed -n 's/.*user_code" : "\([A-Z\-]*\)",.*/\1/p')
verification_url=$(echo $result | sed -n 's/.*"verification_url" : "\(http.*\)",.*/\1/p')
device_code=$(echo $result | sed -n 's/.*"device_code" : "\(.*\)", "user.*$/\1/p')

echo "Going to open browser at '$verification_url'"
echo "We put the user code in your clipboard. Just paste into the website when loaded"
echo "Just in case, this is the user code: $user_code"
echo $user_code | pbcopy
echo "Press any key to open browser. Come back to terminal when done..."
read
open "$verification_url"
echo "Press any key when you've entered the code..."
read

curl -v https://www.googleapis.com/oauth2/v4/token \
  -d "client_id=$client_id" \
  -d "client_secret=$client_secret" \
  -d "code=$device_code" \
  -d "grant_type=http://oauth.net/grant_type/device/1.0"