4 files changed, 97 insertions, 4 deletions
diff --git a/app/helpers/application_helper.rb b/app/helpers/application_helper.rb
index 6de5e1b..920186d 100644
--- a/app/helpers/application_helper.rb
+++ b/app/helpers/application_helper.rb
@@ -19,7 +19,8 @@ module ApplicationHelper
   # http://twitter.github.io/bootstrap/base-css.html#icons
   #
   def icon(name, color=nil)
-    "<i class=\"icon-#{name} #{color_class(color)}\"></i> ".html_safe
+    content_tag :span, '',
+      class: "glyphicon glyphicon-#{name} #{color_class(color)}"
   end
 
   def big_icon(name, color=nil)
diff --git a/app/helpers/link_helper.rb b/app/helpers/link_helper.rb
index ddb063e..b74e1d7 100644
--- a/app/helpers/link_helper.rb
+++ b/app/helpers/link_helper.rb
@@ -39,6 +39,10 @@ module LinkHelper
   def btn(*args, &block)
     html_options = extract_html_options!(args, &block)
     type = Array(html_options.delete(:type))
+    btn_opts = [:default, :primary, :success, :info, :warning, :danger, :link]
+    if (type & btn_opts).blank?
+      type << :default
+    end
     type.map! {|t| "btn-#{t}"}
     html_options[:class] = concat_classes(html_options[:class], 'btn', type)
     args[0] = t(args[0]) if args[0].is_a?(Symbol)
diff --git a/app/helpers/navigation_helper.rb b/app/helpers/navigation_helper.rb
index 2639246..1df840c 100644
--- a/app/helpers/navigation_helper.rb
+++ b/app/helpers/navigation_helper.rb
@@ -66,9 +66,9 @@ module NavigationHelper
   end
 
   def extract_icon!(options)
-    icon = options.delete(:icon)
-    if icon.present?
-      content_tag(:i, '', class: "icon-#{icon}")
+    name = options.delete(:icon)
+    if name.present?
+      icon name
     else
       ""
     end
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