module Middleman::Util::UriTemplates

def apply_uri_template(template, data)
  ::Middleman::Util.normalize_path(::Addressable::URI.unencode(template.expand(data)).to_s)
end

def date_to_params(date)
  {
    year: date.year.to_s,
    month: date.month.to_s.rjust(2, '0'),
    day: date.day.to_s.rjust(2, '0')
  }
end

def extract_params(template, path)
  template.extract(path, BlogTemplateProcessor)
end

def safe_parameterize(str)
  sep = '-'
  # Reimplementation of http://api.rubyonrails.org/classes/ActiveSupport/Inflector.html#method-i-parameterize that preserves un-transliterate-able multibyte chars.
  parameterized_string = ::ActiveSupport::Inflector.transliterate(str.to_s).downcase
  parameterized_string.gsub!(/[^a-z0-9\-_\?]+/, sep)
  parameterized_string.chars.to_a.each_with_index do |char, i|
    next unless char == '?' && str[i].bytes.count != 1
    parameterized_string[i] = str[i]
  end
  re_sep = ::Regexp.escape(sep)
  # No more than one of the separator in a row.
  parameterized_string.gsub!(/#{re_sep}{2,}/, sep)
  # Remove leading/trailing separator.
  parameterized_string.gsub!(/^#{re_sep}|#{re_sep}$/, '')
  parameterized_string
end

def uri_template(tmpl_src)
  # Support the RFC6470 templates directly if people use them
  if tmpl_src.include?(':')
    tmpl_src = tmpl_src.gsub(/:([A-Za-z0-9]+)/, '{\1}')
  end
  ::Addressable::Template.new(::Middleman::Util.normalize_path(tmpl_src))
end