Class: Msgtrail::Twitter

Inherits:
Object
  • Object
show all
Defined in:
lib/msgtrail/twitter.rb

Constant Summary collapse

PRE_AUTHENTICATION = 
"Basic %s".freeze
POST_AUTHENTICATION = 
"Bearer %s".freeze
CONTENT_TYPE_HEADER = 
{ 'Content-Type': 'application/x-www-form-urlencoded;charset=UTF-8' }.freeze
TWITTER_API_OAUTH_ENDPOINT = 
'https://api.twitter.com/oauth2/token'.freeze
TWITTER_API_STATUS_ENDPOINT = 
"https://api.twitter.com/1.1/statuses/show.json?id=%s&tweet_mode=extended".freeze
TWITTER_AUTH_BODY = 
'grant_type=client_credentials'.freeze
EXPECTED_TOKEN_TYPE = 
'bearer'.freeze
TWITTER_STATUS_ENDPOINT = 
"https://twitter.com/i/web/status/%s".freeze

Class Method Summary collapse

Class Method Details

.authenticate ⇒ Object 



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# File 'lib/msgtrail/twitter.rb', line 25

def self.authenticate
  api_key = ENV['TWITTER_CONSUMER_API_KEY']
  secret = ENV['TWITTER_CONSUMER_SECRET_KEY']
  credentials = Base64.strict_encode64("#{api_key}:#{secret}")
  begin
    result = HTTP.auth(PRE_AUTHENTICATION % credentials)
                 .headers(CONTENT_TYPE_HEADER)
                 .post(TWITTER_API_OAUTH_ENDPOINT, body: TWITTER_AUTH_BODY)
  rescue
    puts("Failed to authenticate with Twitter API (#{$!})")
    exit(2)
  end
  begin
    json = MultiJson.load(result.to_s, symbolize_keys: true)
  rescue
    puts("Invalid JSON from '#{TWITTER_API_OAUTH_ENDPOINT}' (#{$!})")
    exit(2)
  end
  EXPECTED_TOKEN_TYPE == json[:token_type] ? json[:access_token] : nil
end

.fetch(tweet_id) ⇒ Object 



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# File 'lib/msgtrail/twitter.rb', line 17

def self.fetch(tweet_id)
  if access_token = authenticate
    full_tweet_text(access_token, tweet_id)
  else
    puts("Failed to authenticate with Twitter API")
  end
end

.full_tweet_text(access_token, tweet_id) ⇒ Object

There seem to be two ways to get to any tweet by its ID:

  1. twitter.com/i/web/status/id

  2. twitter.com/statuses/#id

Using former method which seems to work best on desktop and mobile.



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# File 'lib/msgtrail/twitter.rb', line 50

def self.full_tweet_text(access_token, tweet_id)
  url = TWITTER_API_STATUS_ENDPOINT % tweet_id
  begin
    result = HTTP.auth(POST_AUTHENTICATION % access_token)
                 .get(url)
  rescue
    puts("Failed to get tweet from '#{url}' (#{$!})")
    exit(2)
  end
  begin
    json = MultiJson.load(result.to_s, symbolize_keys: true)
  rescue
    puts("Invalid JSON from '#{url}' (#{$!})")
    exit(2)
  end
  {
    body: json[:full_text],
    source: TWITTER_STATUS_ENDPOINT % tweet_id,
    type: Article::TYPE_TWEET
  }
end

.tweet_bodies(tweet_ids) ⇒ Object 



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# File 'lib/msgtrail/twitter.rb', line 13

def self.tweet_bodies(tweet_ids)
  tweet_ids.map { |tweet_id| fetch(tweet_id) }
end