changelog_line.rb in danger-changelog-0.4.1

- old
+ new

@@ -1,9 +1,13 @@
 module Danger
   module Changelog
     # An abstract CHANGELOG.md line.
     class ChangelogLine
+      NON_DELIMITERS = /[^(){}\[\]]*/.freeze
+      PAIRED = /\(#{NON_DELIMITERS}\)|\{#{NON_DELIMITERS}\}|\[#{NON_DELIMITERS}\]/.freeze
+      DELIMITER = /[(){}\[\]]/.freeze
+
       attr_accessor :line
 
       def initialize(line)
         self.line = line
       end
@@ -19,9 +23,16 @@
       end
 
       # Match the given line if it potentially represents the specific changelog line
       def self.validates_as_changelog_line?(_line)
         abort "You need to include a function for #{self} for validates_as_changelog_line?"
+      end
+
+      # https://stackoverflow.com/questions/25979364/ruby-regex-for-matching-brackets
+      def balanced?(line_with_parens)
+        line_with_parens = line_with_parens.dup
+        line_with_parens.gsub!(PAIRED, ''.freeze) while line_with_parens =~ PAIRED
+        line_with_parens !~ DELIMITER
       end
     end
   end
 end