Merge branch 'feature-tags' of gitlab.c3sl.ufpr.br:portalmec/portalmec into feature-tags

app/services/tags_importer.rb

@@ -2,10 +2,18 @@ class TagsImporter
   attr_accessor :items
 
   def import
+    tags = {}
     @items.each do |learning_object|
-      learning_object.tag_list = parse_tags learning_object.get_metadata_values_of 'dc.subject.category'
-      learning_object.save
+      categories = parse_tags learning_object.get_metadata_values_of 'dc.subject.category'
+      keywords = learning_object.get_metadata_values_of 'dc.subject.keyword'
+      (categories + keywords).each do |tag_name|
+        unless tag_exists?(tag_name, tags)
+          tags[tag_name] = Tag.new(name: tag_name)
+        end
+      end
     end
+
+    Tag.import tags.values
   end
 
   private
@@ -15,4 +23,9 @@ class TagsImporter
     values.compact.each { |value| tags << value.split('::') }
     tags.flatten.uniq.map(&:strip)
   end
+
+  def tag_exists? (tag_name, tags)
+    !Tag.find_by_name(tag_name).nil? || !tags[tag_name].nil?
+  end
+
 end