multi-social.rb

#!/usr/bin/ruby

require "rubygems"
require "twitter"
require "koala"

client = Twitter::REST::Client.new do |config|
  config.consumer_key        = "my_consumer_key"
  config.consumer_secret     = "my_consumer_secret"
  config.access_token        = "my_access_token"
  config.access_token_secret = "my_access_token_secret"
end

start_date = Date.parse("2015-01-01")
end_date   = Date.parse("2015-06-30")
abort if start_date > end_date

local_offset = Rational(5.5, 24)
options = {:count => 200, :include_rts => true}

tweets = []
twitter_output = []
while (tweets = client.user_timeline("mahboob_h", options)) do
    abort if tweets.length == 0
    first_tweet_created_date = Date.parse(tweets.first.created_at.to_s[0..9])
    last_tweet_created_date  = Date.parse(tweets.last.created_at.to_s[0..9])
    
    if first_tweet_created_date < start_date
        break
    elsif last_tweet_created_date > end_date
        # do nothing, decrement id and fetch next 200 tweets
    else
        tweets.each do |tweet|
            tweet_created_date = DateTime.parse(tweet.created_at.to_s[0..23])
            tweet_created_date += local_offset
            break if tweet_created_date < start_date
            if (tweet_created_date >= start_date and
                tweet_created_date <= end_date)
                twitter_output << "#{tweet_created_date.to_s[0..9]}" + "   " + "#{tweet.text}\n"
            end
        end
    end
    options[:max_id] = tweets.last.id-1
end

abort if twitter_output.length == 0

fb_update = "Hello Folks! This is the Ruby program written by Mahboob Hussain.\nMy creator, Mr. Hussain gives me a start date and end date. I go and fetch from his Twitter timeline all tweets that he tweeted between those dates and post them to his Facebook wall.\nI am happy to save Mr. Mahboob a small amount of time that he has to spend to copy and paste from Twitter web page to his Facebook wall.\nHere are the tweets he tweeted in the first six months of this year. Read and enjoy. Thanks :)\n"
fb_update << "----------------------------------------------\n"

twitter_output.reverse!
twitter_output.each do |tweet_with_date|
    fb_update << tweet_with_date
end

@graph = Koala::Facebook::API.new("my_user_token")
@graph.put_wall_post(fb_update)