1 files changed, 88 insertions, 0 deletions
diff --git a/app/helpers/twitter_helper.rb b/app/helpers/twitter_helper.rb
new file mode 100644
index 0000000..7ce28be
--- /dev/null
+++ b/app/helpers/twitter_helper.rb
@@ -0,0 +1,88 @@
+module TwitterHelper
+  def twitter_enabled
+    if Rails.application.secrets.twitter
+      Rails.application.secrets.twitter['enabled'] == true
+    end
+  end
+
+  def twitter_client
+    Twitter::REST::Client.new do |config|
+      config.bearer_token = Rails.application.secrets.twitter['bearer_token']
+    end
+  end
+
+  def twitter_handle
+    Rails.application.secrets.twitter['twitter_handle']
+  end
+
+  def twitter_user_info
+      $twitter_user_info ||= []
+  end
+
+  def update_twitter_info
+    twitter_user_info[0] = Time.now
+    twitter_user_info[1] = twitter_client.user(twitter_handle).name
+    twitter_user_info[2] = twitter_client.user_timeline(twitter_handle, {:count => 200}).select{ |tweet| tweet.text.start_with?('RT','@')==false}
+    if twitter_user_info[2] == nil
+      error_handling
+      twitter_user_info[3] = "The twitter handle does not exist or the account's tweets are protected. Please change the privacy settings accordingly or contact your provider-admin."
+    end
+  rescue Twitter::Error::BadRequest
+    error_handling
+    twitter_user_info[3] = "The request for displaying tweets is invalid or cannot be otherwise served."
+  rescue Twitter::Error::Unauthorized
+    error_handling
+    twitter_user_info[3] = "Your bearer-token is invalid or the account's tweets are protected and cannot be displayed. Please change the privacy settings of the corresponding account, check your bearer-token in the secrets-file or contact your provider-admin to have the tweets shown."
+  rescue Twitter::Error::Forbidden
+    error_handling
+    twitter_user_info[3] = "The request for displaying tweets is understood, but it has been refused or access is not allowed."
+  rescue Twitter::Error::NotAcceptable
+    error_handling
+    twitter_user_info[3] = "An invalid format is specified in the request for displaying tweets."
+  rescue Twitter::Error::TooManyRequests
+    error_handling
+    twitter_user_info[3] = "The rate-limit for accessing the tweets is reached. You should be able to display tweets in a couple of minutes."
+  rescue Twitter::Error::NotFound
+    error_handling
+    twitter_user_info[3] = "The twitter hanlde does not exist."
+  rescue Twitter::Error
+    error_handling
+    twitter_user_info[3] = "An error occured while fetching the tweets."
+  end
+
+  def error_handling
+    twitter_user_info[2] = []
+    twitter_user_info
+  end
+
+  def cached_info
+    if twitter_user_info[0] == nil
+      update_twitter_info
+    else
+      if Time.now > twitter_user_info[0] + 15.minutes
+        update_twitter_info
+      end
+    end
+    twitter_user_info
+  end
+
+  def twitter_name
+    cached_info[1]
+  end
+
+  def num_of_tweets
+    3
+  end
+
+  def tweets
+    cached_info[2].take(num_of_tweets)
+  end
+
+  def error_message
+    cached_info[3]
+  end
+
+  def all_tweets_count
+    twitter_user_info[2].count
+  end
+end