MSI Source Product Listing

The MSI Source Product Listing  extension for Adobe Commerce and Magento Open Source is a  high-performance inventory management and catalog filtering solution  designed for multi-channel merchants. By default, the core Multi-Source  Inventory (MSI) engine aggregates inventory stocks across physical  channels into single website-level stocks. However, modern storefront  layouts, geo-located services, and Buy Online Pickup In Store (BOPIS)  configurations require presenting specific catalog views, category  pages, search results, and checkout validation rules relative to stock  levels at individual physical warehouses or retail locations.

This extension addresses this need by introducing a decoupled, custom database indexing layer (kodefolks_source_stock_index)  that dynamically compiles stock quantities and salable statuses on a  source-by-source basis. It intercepts catalog search requests sent to  Elasticsearch or OpenSearch query builders to append dynamic,  location-specific stock filters. As a result, products that are out of  stock for a customer's active location are automatically hidden from  category and search listing pages.

The active inventory source is resolved dynamically using a stacked  priority stack, accommodating standard frontend setups, headless setups  (via custom HTTP headers), and cookie-based geolocation utilities.

Key Features

• Source-Wise Inventory Indexer: Pre-computes and  caches stock levels (simple, configurable, bundle, grouped, and virtual  product types) to prevent database overhead during page loads.
• Elasticsearch & OpenSearch Integration:  Dynamically injects source stock range queries into category pages,  quick search results, advanced search results, and GraphQL endpoints.
• Layered Navigation Selector: Renders an optional  frontend location dropdown widget in the catalog sidebar, allowing  customers to manually choose their preferred location.
• Smart Suppress Fallback: Automatically hides the  sidebar selector widget when compatible geolocation store locators are  active to prevent UI conflicts, falling back to read store locator  cookies automatically.
• Headless Architecture Ready: Resolves inventory sources for PWAs or custom frontend clients (e.g., Next.js) using the custom HTTP header InventorySource.
• Add-to-Cart & Checkout Validation: Prevents  customers from placing orders that exceed physical stock availability at  their selected location, prompting clear, real-time localized quantity  warnings.
• Built-in Diagnostics CLI: Includes a dedicated terminal command (bin/magento kodefolks:storewisestock:test-filter) to test and verify Elasticsearch query structures.

Installation & Configuration Overview

1. Registration: Run the standard CLI activation  commands: bin/magento module:enable  Kodefolks_StoreWiseStock bin/magento setup:upgrade bin/magento  setup:di:compile bin/magento setup:static-content:deploy -f
2. Index: Reindex the custom data source and flush caches:bashbin/magento indexer:reindex kodefolks_source_stockbin/magento cache:flush
3. Configuration: Manage settings under Stores > Configuration > Kodefolks > Store Wise Stock  inside your Admin Panel. Here you can enable source-based filtering,  select default fallback inventory sources, and enable or disable the  sidebar location widget.