Module: Zena::Use::VersionHash

Defined in:
lib/zena/use/version_hash.rb

Overview

This module takes care of deciding which version should be seen by whom (depending on access rights and language) by maintaining a ‘vhash’ entry. This module is also responsible for preloading versions during ‘many’ finds.

Technically, the vhash field contains two dictionaries “readonly” and “write”. Each of these dictionaries provide mapping from languages to version id.

{'r' => {'en' => 1234, 'fr' => 3456}, 'w' => {'en' => 5436, 'fr' => 4526}}

Defined Under Namespace

Modules: ModelMethods

Class Method Summary collapse

Class Method Details

.cached_values_from_records(records) ⇒ Object 



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# File 'lib/zena/use/version_hash.rb', line 12

def self.cached_values_from_records(records)
  r_hash, w_hash = {}, {}
  vhash = {'r' => r_hash, 'w' => w_hash}
  lang  = nil
  n_pub = nil
  records.each do |record|
    if record['lang'] != lang
      lang   = record['lang']
      # highest status for this lang
      if record['status'].to_i == Zena::Status::Pub
        # ok for readers & writers
        w_hash[lang] = r_hash[lang] = record['id'].to_i
        v_pub = record['publish_from']

        if v_pub.kind_of?(String)
          v_pub = DateTime.parse(record['publish_from']) rescue Time.now
        end

        if n_pub.nil? || v_pub < n_pub
          n_pub = v_pub
        end
      else
        # too high, only ok for writers
        w_hash[lang] = record['id'].to_i
      end
    elsif record['status'].to_i == Zena::Status::Pub
      # ok for readers
      r_hash[lang] = record['id'].to_i
      v_pub = DateTime.parse(record['publish_from']) rescue Time.now
      if n_pub.nil? || v_pub < n_pub
        n_pub = v_pub
      end
    end
  end
  {:publish_from => n_pub, :vhash => vhash}
end