Popularity Plugin: Only leaf collections get a popularity score

[martijnvdbrug]

Which plugin/repository is the issue about?
Popularity Score plugin

Describe the bug
Parent collections should have the sum of their children's popularity score as their own score. Right now only leaf collections have a popularity score.

Expected behavior

1. Calculate popularity scores of all products (already works)
2. Find all collections without children, and calculate their scores based on the products in it
3. Get parents of collections and sum their scores
4. Traverse the parents until you end up at the root collections.

Environment

• NodeJS version
• Vendure version: 3.1.1
• Plugin version 1.7.3
• Database MySQL