# Copyright (C) 2012-2014 Zammad Foundation, http://zammad-foundation.org/
module Ticket::SearchIndex

=begin

build and send data for search index to backend

  ticket = Ticket.find(123)
  result = ticket.search_index_update_backend

returns

  result = true # false

=end

  def search_index_update_backend
    return if !self.class.search_index_support_config

    # default ignored attributes
    ignore_attributes = {
      created_by_id: true,
      updated_by_id: true,
      active: true,
    }
    if self.class.search_index_support_config[:ignore_attributes]
      self.class.search_index_support_config[:ignore_attributes].each {|key, value|
        ignore_attributes[key] = value
      }
    end

    # for performance reasons, Model.search_index_reload will only collect if of object
    # get whole data here
    ticket = self.class.find(id)

    # remove ignored attributes
    attributes = ticket.attributes
    ignore_attributes.each {|key, value|
      next if value != true
      attributes.delete( key.to_s )
    }

    # add tags
    tags = Tag.tag_list( object: 'Ticket', o_id: id )
    if tags && !tags.empty?
      attributes[:tag] = tags
    end

    # lookup attributes of ref. objects (normally name and note)
    attributes = search_index_attribute_lookup( attributes, ticket )

    # list ignored file extentions
    attachments_ignore = Setting.get('es_attachment_ignore') || [ '.png', '.jpg', '.jpeg', '.mpeg', '.mpg', '.mov', '.bin', '.exe' ]

    # max attachment size
    attachment_max_size_in_mb = Setting.get('es_attachment_max_size_in_mb') || 40

    # collect article data
    articles = Ticket::Article.where( ticket_id: id )
    attributes['articles'] = []
    articles.each {|article|
      article_attributes = article.attributes

      # remove note needed attributes
      ignore = %w(created_by_id updated_by_id updated_at references message_id_md5 message_id in_reply_to ticket_id)
      ignore.each {|attribute|
        article_attributes.delete( attribute )
      }

      # lookup attributes of ref. objects (normally name and note)
      article_attributes = search_index_attribute_lookup( article_attributes, article )

      # index raw text body
      if article_attributes['content_type'] && article_attributes['content_type'] == 'text/html' && article_attributes['body']
        article_attributes['body'] = article_attributes['body'].html2text
      end

      # lookup attachments
      article.attachments.each {|attachment|
        if !article_attributes['attachments']
          article_attributes['attachments'] = []
        end

        # check file size
        next if !attachment.content
        next if attachment.content.size / 1024 > attachment_max_size_in_mb * 1024

        # check ignored files
        next if !attachment.filename

        filename_extention = attachment.filename.downcase
        filename_extention.gsub!(/^.*(\..+?)$/, '\\1')

        next if attachments_ignore.include?( filename_extention.downcase )

        data = {
          '_name'    => attachment.filename,
          '_content' => Base64.encode64( attachment.content )
        }
        article_attributes['attachments'].push data
      }
      attributes['articles'].push article_attributes
    }

    return if !attributes
    SearchIndexBackend.add(self.class.to_s, attributes)
  end
end
