module Jekyll::Algolia::FileBrowser

def self.date(file)

front-matter.
Pages and other collection items can only have a date set in
Posts have their date coming from the filepath, or the front-matter.

file - The Jekyll file

Public: Returns a timestamp of the file date 
def self.date(file)
  # Collections get their date from .date, while pages read it from .data.
  # Jekyll by default will set the date of collection to the current date,
  # but we overwrote this.
  date = if file.respond_to?(:date)
           file.date
         else
           file.data['date']
         end
  return nil if date.nil?
  date.to_time.to_i
end