Shopping cart for plone.

Depend your instance to bda.plone.cart and install it as addon in plone control panel.

This package provides components needed to render a shopping cart. It expects several contracts defined in:

• bda.plone.cart.interfaces.ICartDataProvider
• bda.plone.cart.interfaces.ICartItemDataProvider
• bda.plone.cart.interfaces.ICartItemStock
• bda.plone.cart.interfaces.ICartItemPreviewImage
• bda.plone.cart.interfaces.ICartItemAvailability
• bda.plone.cart.interfaces.ICartItemState
• bda.plone.cart.interfaces.ICartDiscount
• bda.plone.cart.interfaces.ICartItemDiscount

Please take a look at the corresponding interfaces for contract details. Further some abstract base implementations are available in bda.plone.cart.__init__ which can be used as base class for concrete implementations.

The cart can be rendered as a portlet or inside a viewlet in the portal header. It's not possible to render the cart twice in one page. Thus, the viewlet gets skipped automatically if a cart portlet assignment is found. Also, if cart summary, checkout, order confirmation or portal factory is rendered, regular cart rendering gets skipped.

Its possible to define custom patterns which are checked against recent browser URL defining whether to skip cart rendering. This is useful for custom payment implementations and similar:

from bda.plone.cart.browser.portlet import SKIP_RENDER_CART_PATTERNS

SKIP_RENDER_CART_PATTERNS.append('@@my_payment')

Take a look at bda.plone.cart.browser:tile.pt how HTML markup for adding items to cart might look like.

Basically a shop item consists of a container DOM element, containing an element with CSS class cart_item_uid, where the item UID is taken from:

<span class="cart_item_uid" style="display: none;">12345678</span>

a text input field with CSS class cart_item_count which is read for item count:

<input type="text" size="2" value="1" class="cart_item_count" />

a quantity unit:

<span class="cart_item_quantity_unit">Quantity</span>

If quantity unit can be be float, add quantity_unit_float CSS class:

<input type="text" size="2" value="1"
       class="cart_item_count quantity_unit_float" />

the "add to Cart" action:

<a href="" class="add_cart_item">add to cart</a>

and the "update cart" action:

<a href="" class="update_cart_item">update cart</a>

Optionally, If cart viewlet is used, a status message can be displayed when adding or updating cart items. This is useful if user should get clearly informed if cart data has changed. To display status messages, add CSS class show_status_message to "add to cart" and "update cart" actions:

<a href="" class="update_cart_item show_status_message">update cart</a>

and optionally an element defining a comment or an input for entering a comment:

<input type="text" size="16" value="" class="cart_item_comment" />

If comment should be required, add CSS class required to comment input. If comment is empty, an error message gets shown to the user when trying to add or update a cart item:

<input type="text" size="16" value="" class="cart_item_comment required" />

$ cd src/bda/plone/cart/
$ ./i18n.sh

CSS Styles are written in Sass and compiled via `npm`:

$ npm install
$ npm run build  # to build the resources or
$ npm run watch  # to watch changes during development

This package was developed as part of the bda.plone.shop stack. Please refer to bda.plone.shop for concrete implementations of the expected contracts.

• Robert Niederreiter (Autor)
• Sven Plage
• Peter Holzer
• Harald Friessnegger
• Peter Mathis
• Espen Moe-Nilssen
• Johannes Raggam
• Jure Cerjak
• Icons by famfamfam