Layered Navigation of Categories
--------------------------------

                 Key: OFBIZ-3186
                 URL: https://issues.apache.org/jira/browse/OFBIZ-3186
             Project: OFBiz
          Issue Type: New Feature
          Components: product, specialpurpose/ecommerce
    Affects Versions: SVN trunk
            Reporter: Mridul Pathak
            Priority: Minor
             Fix For: SVN trunk


Layered navigation in an Ecommerce application allows the user to filter the 
product listing based on categories, features and price ranges.  The user can 
apply multiple filters to the given product listing.  He can narrow or expand 
his search and try different filter combinations  so as to find the desired 
product.

I have implemented Layered Navigation in OFBiz ecommerce with following filters:
# Sub Categories: This filter is shown whenever there are sub-categories 
present under the top-level category or current selected category. Count of 
products within the category is shown against each category, works with 
multilevel deep category hierarchy.  Selecting a sub category will show 
products within that category and filters will be updated accordingly for the 
new product list.
# Features: Feature filters are grouped by Feature Types.  Count of products 
that has the feature associated as standard, selectable or distinguishing is 
shown against that feature.  Current Implementation has feature filters for 
ProductFeatureType="COLOR".
# List Price Range: This filter will always show.  When applied filters product 
based on List Price Range.  Current implementation is done by listing static 
price ranges at code level.

The above implementation is completely based on the OOTB Product Search 
functionality with few additional methods in ProductSearchSession to derive 
count against different type of filters.

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