Google+ to Twitter with Photo and Coordinates

gplus2twitter.rb

#!/usr/bin/env ruby

require 'net/https'
require 'open-uri'
require 'time'
require 'tmpdir'
require 'rubygems'
require 'oauth'
require 'json/pure'

user_id = '(Your Google+ user ID)'
api_key = '(Your Google API key)'

def shorten( uri )
    data = {'longUrl' => uri}
    r = nil
    begin
        Net::HTTP.version_1_2
        https = Net::HTTP.new( 'www.googleapis.com',443 )
        https.use_ssl = true
        https.verify_mode = OpenSSL::SSL::VERIFY_PEER
        store = OpenSSL::X509::Store.new
        store.set_default_paths
        https.cert_store = store
        res = https.start do |http|
            http.post( '/urlshortener/v1/url?key='+api_key, data.to_json, 'Content-Type' => 'application/json' )
        end
        if res && obj = JSON.parse( res.body ) then
            r = obj['id']
        end
    rescue
    end
    r || uri
end

consumer_key = '(Your OAuth consumer key)'
consumer_secret = '(Your OAuth consumer secret)'
consumer = OAuth::Consumer.new( consumer_key, consumer_secret, :site => "http://twitter.com")
access_token = '(Your OAuth access token)'
access_token_secret = '(Your OAuth access token secret)'
token = OAuth::AccessToken.new( consumer, access_token, access_token_secret )

tmpfile = Dir.tmpdir+'/gplus2twitter'

obj = open( "https://www.googleapis.com/plus/v1/people/#{user_id}/activities/public?key=#{api_key}" ){|f| JSON.parse( f.read )} rescue nil
exit unless obj

if File.exist?( tmpfile ) then
    prev = open( tmpfile ){|f| Time.parse( f.read )}
else
    prev = Time.now - 600 # 10 minutes if first time
end

r = []
obj['items'].each do |item|
    date = Time.at( Time.parse( item['published'] ).to_i )
    if date > prev then
        title = item['title']
        link = item['url']
        ellipsis = ''
        tinyurl = shorten( link )
        while title.jlength + ellipsis.length + 1 + tinyurl.length > 140 do
            title.chop!
            ellipsis = '...'
        end
        param = {'status' => "#{title}#{ellipsis} #{tinyurl}"}
        if geocode = item['geocode'] then
            lat, long = geocode.split
            param['lat'] = lat
            param['long'] = long
        end
        if object = item['object'] then
            if attachments = object['attachments'] then
                if attachments0 = attachments.first then
                    if fullImage = attachments0['fullImage'] then
                        url = fullImage['url']
                        param['media'] = open( url ){|f| f.read}
                    end
                end
            end
        end
        r << [param, date]
    end
end
r.sort_by{|i| i.last}.each do |param, date|
    path  = param.include?( 'media' ) ? 'https://upload.twitter.com/1/statuses/update_with_media.json' : 'http://api.twitter.com/1/statuses/update.json'
    res = token.post( path, param )
    break if res.code != '200'
    open( tmpfile, "w" ){|f| f.print date.to_s}
end
exit