Add remaining FileResource methods

lib/calligraphy/utils.rb

@@ -18,5 +18,21 @@ module Calligraphy
     def split_and_pop(path:, separator: '/')
       path.split(separator)[0..-2]
     end
+
+    def obj_exists_and_is_not_type?(obj:, type:)
+      obj.nil? ? false : obj != type
+    end
+
+    def map_array_of_hashes(arr_hashes)
+      [].tap do |output_array|
+        arr_hashes.each do |hash|
+          output_array.push hash.map { |k, v| v }
+        end
+      end
+    end
+
+    def extract_lock_token(if_header)
+      if_header.scan(Calligraphy::LOCK_TOKEN_REGEX)&.flatten[0]
+    end
   end
 end