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https://github.com/bluedynamics/bda.plone.cart

Shopping Cart
https://github.com/bluedynamics/bda.plone.cart

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Shopping Cart

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bda.plone.cart
==============

.. image:: https://img.shields.io/badge/code%20style-black-000000.svg
:target: https://github.com/ambv/black

.. image:: https://travis-ci.org/bluedynamics/bda.plone.shop.svg?branch=master
:target: https://travis-ci.org/bluedynamics/bda.plone.shop

Shopping cart for plone.

.. contents::

Base package Installation
-------------------------

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

Provide contracts
-----------------

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.

Cart Visibility
---------------

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:

.. code-block:: python

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

SKIP_RENDER_CART_PATTERNS.append('@@my_payment')

Markup
------

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:

.. code-block:: html

12345678

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

.. code-block:: html

a quantity unit:

.. code-block:: html

Quantity

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

.. code-block:: html

the "add to Cart" action:

.. code-block:: html

add to cart

and the "update cart" action:

.. code-block:: html

update cart

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:

.. code-block:: html

update cart

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

.. code-block:: html

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:

.. code-block:: html

Create translations
-------------------

::

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

Develop CSS Styles
------------------

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

A ready-to-use implementation
-----------------------------

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.

Contributors
------------

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