Nabis Coding Exercises

Requirements

• Node v20

Setup

npm install

Running tests

npm test

Project Details

This is a NodeJS project that comes from one of our production services that is responsible for synchronizing data between two different Postgres databases. This service is responsible for finding deltas between the app database and the inventory database then creating proper representations in the inventory database.

A better description may be the following case:

A new product is created in the app database. Our service will find that new product and create a corresponding record for that new product in the inventory database.

This project requires no database connection. The data calls are mocked with simple JSON that is defined in ./src/db/data.ts.

The entrypoint is at the very bottom of sync.ts, the function is named sync.

Schema

• inventory inventory data schema
  • inventory - inventory data at the SkuBatch + Warehouse-level
  • inventory_aggregate - inventory data at the SkuBatch-level
• app web app schema
  • Sku - a unique product
  • Batch - a batch of harvest material
  • SkuBatch - a Sku that is created from a specific batch

Term Glossary

• Sku a SKU is a unique product - think a 1.0 gram Maui Wowie vape cartridge
• Batch a SKU is created by different harvest material, a SKU is crafted from multiple batches
• SkuBatch a SkuBatch is a SKU that is created from a specific batch - it is the unique tuple that represents a distinct Sku created from a distinct Batch.
• WMS Warehouse Management System - the system that manages inventory in the warehouse

Tasks

1. Find the bugs in the codebase and fix them
2. Implement the requested functional in ./src/db/sql.util.ts in formatSqlValue
3. Implement the functional as requested in the comment on line 176 of sync.ts
4. Complete the commented out tests in sync.spec.ts
5. Envision us now not making the inserts and updates directly to the inventory database. Implement the ability to make the necessary POST/PUT request to an API endpoint to create/update the inventory records (instead of making updates directly).
   • The fake API endpoint should be https://local-inventory.nabis.dev/v1/
   • The /inventory endpoint accepts POST and PUT. The skuBatchId, skuId, and warehouseId fields are required.
   • The /inventory-aggregate endpoint accepts POST and PUT. The skuBatchId and skuId fields are required.
   • The body of the request payload should be JSON with the required keys/values.