POS-Server/app/datatables/products_datatable.rb

class ProductsDatatable
  delegate :params, :link_to, :number_to_currency, :image_tag,:fa_icon,
    :products_path, :edit_product_path, :product_update_status_path, :product_prices_path,
    :available_products_path, :available_product_edit_price_path, :product_edit_variants_path, :product_labels_path,
    to: :@view
  def initialize(view, user)
    @view = view
    @current_user = user
  end

  def as_json(options = {})
    {
      sEcho: params[:sEcho].to_i,
      iTotalRecords: Product.vigentes_parents.size,
      iTotalDisplayRecords: products.total_entries,
      aaData: data
    }
  end

private

  def data
    products.map.with_index do |product, index|
      img = product.img_product? ? product.img_product.url(:medium) : img = "/images/small/missing.png"
      product_available = @current_user.usertype == "A" || @current_user.usertype == "SS" ? nil : product.get_available_in_pointsale(@current_user.pointsale_id)
      arr = [
              (index + 1),
              (image_tag img),
              display_name(product)
            ]
      arr << dollar_price(product) if @current_user.usertype == "A" || @current_user.usertype == "SS"
      arr << [
                product_price(product, product_available),
                product.category.category,
                product.active? ? "<i class='fa fa-check fa-2 font-green'></i>" : "<i class='fa fa-times fa-2 font-red'></i>",
                get_actions(product, product_available)
              ]
      arr.flatten
    end
  end

  def display_name(product)
    display_product = "<label>#{product.name} </label> <br>  SKU: <b> #{product.sku} </b>"
    display_product += "<i class='fa fa-cubes font-yellow-gold'></i>" if product.is_parent
    display_product += "<br>" + (product.parent_id.nil? ? "" : "<small>#{product.display_attributes}</small><br>") + "<i class='fa fa-barcode'></i>: <b> #{product.barcode} </b> <br>"
    display_product += "<p> #{product.description} </p>"
    display_product
  end

  def dollar_price(product)
    if @current_user.usertype == "A" || @current_user.usertype == "SS"
      product.is_in_dollars? ? "#{number_to_currency(product.price_base_dollars, precision: 2)} USD" : "#{number_to_currency(product.price_base, precision: 2)} MXN"
    else
      '.'
    end
  end

  def product_price(product, product_available)
    if @current_user.usertype == "G"
      price_sale = product_available.present? && product_available.price_sale.present? ? product_available.price_sale : product.price_sale
      price = "<h3> #{number_to_currency(price_sale, precision: 2)}</h3>"
      price += 'Precio de venta base <br>' + number_to_currency(product.price_sale, precision: 2)
    else
      ''
    end
  end

  def products
    @products ||= fetch_products
  end

  def fetch_products
    products =
      if @current_user.usertype == 'G'
        Product.activos_children
      else
        Product.vigentes_parents.includes(:category)
      end
    products = products.page(page).per_page(per_page)
    unless params[:busqueda].blank?
      products = products.where("sku ilike :search or name ilike :search", search: "%#{params[:busqueda]}%")
    end
    products
  end

  def page
    params[:start].to_i / per_page + 1
  end

  def per_page
    params[:length].to_i > 0 ? params[:length].to_i : 20
  end

  def sort_column
    columns = %w[name]
    columns[params[:iSortCol_0].to_i]
  end

  def sort_direction
    params[:sSortDir_0] == "desc" ? "desc" : "asc"
  end

  def get_actions(product, product_available)
    links = '<div class="clearfix">'
    links += link_to(fa_icon('search'), product, { class: 'btn btn-icon-only default filtros', title: "Ver producto" })

    if @current_user.usertype == 'G'
      links += (link_to(fa_icon('dollar'), available_product_edit_price_path(product_available), { remote: true, class: 'btn btn-icon-only green-dark', title: "Cambiar precio" })) if product_available
    elsif @current_user.usertype == "A" || @current_user.usertype == "SS"
      links += link_to(fa_icon('edit'), edit_product_path(product), { class: 'btn btn-icon-only btn-primary filtros', title: "Modificar producto" })
      links += link_to(fa_icon('copy'), product_edit_variants_path(product.id), { class: 'btn btn-icon-only btn-info filtros', title: "Modificar variantes del producto" }) if product.presentation
      links += link_to(fa_icon('list-alt'), product_prices_path(product), { remote: true, class: 'btn btn-icon-only green-dark', title: "Precios en punto de venta" })
      links += link_to(fa_icon('ticket'), product_labels_path(product), { remote: true, class: 'btn btn-icon-only purple', title: "Imprimir etiquetas" })
      links += (link_to(fa_icon('toggle-off'), product_update_status_path(product), class: 'btn btn-icon-only default', title: "Desactivar producto", data: { confirm: '¿Está seguro de desactivar el producto?', method: 'post' })) if product.active?
      links += (link_to(fa_icon('toggle-on'), product_update_status_path(product), class: 'btn btn-icon-only green-jungle', title: "Activar producto", data: { confirm: '¿Está seguro de activar el producto?', method: 'post' })) if product.inactive?
      links += (link_to(fa_icon('trash-o'), product, class: 'btn btn-icon-only btn-danger', title: "Eliminar producto", data: { confirm: '¿Esta seguro de eliminar el producto?', method: :delete })) if product.can_be_deleted?
    end
    links += '</div>'
    return links
  end
end