# Editable Confirmed Buys Fields

**Date:** 2026-05-31
**Status:** Success

## Overview
The goal of this task was to make the "Buyer Order #", "Buy Cost", and "Quantity" fields editable on the "Confirmed Buys" tab. This required adding three new `PATCH` endpoints to `wsgi_handler.py` to persist the data to the `confirmed_buys` table, and updating the frontend in `templates/tracking.html` to swap read-only text with inline input fields that save `onblur`. Additionally, updating "Buy Cost" needed to immediately recalculate and re-render the "Minimum List Price" cell.

## Challenges Faced
1. **Frontend Integration with Dynamic Table Rendering:** The table for "Confirmed Buys" is built dynamically via JavaScript using `fetchConfirmed()`. Injecting `onblur` listeners correctly and maintaining the table state seamlessly across updates required mapping the inputs precisely to the right item IDs.
2. **State Updates and Recomputation:** Validating strictly positive buy costs and quantities needed server-side enforcement. Recomputing `minimum_list_price` correctly on the backend required fetching the appropriate prep fee and settings to mirror existing calculation behaviors.
3. **Frontend Playwright Verification:** The local test server login was encapsulated within a frontend modal, which meant standard navigation to `/login` caused 405 Method Not Allowed errors.

## Solutions
1. **Endpoint Creation (`wsgi_handler.py`):**
   - Added `/api/tracking/confirmed/<int:item_id>/buyer-order-id`: Updates `buyer_order_id` (allows clearing to `NULL`).
   - Added `/api/tracking/confirmed/<int:item_id>/buy-cost`: Validates `buy_cost > 0`, updates the database, calculates `minimum_list_price`, and returns the modified row dict.
   - Added `/api/tracking/confirmed/<int:item_id>/quantity`: Validates `quantity_purchased > 0` and updates the database.
2. **Frontend UI Update (`templates/tracking.html`):**
   - Implemented three new asynchronous JavaScript functions (`updateConfirmedBuyerOrderId`, `updateConfirmedBuyCost`, `updateConfirmedQuantity`) using the native `fetch` API.
   - Swapped the literal outputs in the `deal-table` with `<input>` elements formatted for currency or integers, binding them to the update functions via `onblur`.
3. **Playwright Testing:** Used `page.evaluate('toggleForm()')` to successfully unhide the login modal before submitting test credentials, facilitating visual screenshot verification of the new tracking interface.

## Success Status
The task was a success. All three columns are completely editable. Inputs perform proper data validation, updates persist to the database dynamically upon blur, and the UI refetches properly to reflect cascading changes (like the modified Minimum List Price).