# Architecture Overview — Legacy PHP Product Module

## Context
This repo holds one legacy PHP module copied from production.
The module helps product staff create products and generate SEO text.
The module also runs one batch worker that updates OpenCart product descriptions.

Current raw source path was `project/new`.
Target stable path is `project/web/index/new`.
SQL dump target path is `project/sql/db-25052026.sql`.

## Main flows
1. User opens product form.
2. Form reads OpenCart data from MariaDB.
3. User can open AI helper page for one product text.
4. Bulk page writes product ids into `oc_product_queue`.
5. CLI worker reads queue, calls OpenAI, updates `oc_product_description`.

## Constraints
- Keep legacy behavior unchanged in layout and config features.
- Preserve file contents during move unless config externalization requires value lookup changes.
- Keep evidence in repo for each design change.
- Do not redesign auth or deploy in these features.

## System view
```mermaid
graph TD
    U[Backoffice user] --> F[Legacy PHP web module]
    F --> DB[(MariaDB / OpenCart)]
    F --> Q[oc_product_queue]
    W[worker_bulk.php CLI worker] --> Q
    W --> AI[OpenAI API]
    W --> DB
```

## Files and responsibilities
- `bootstrap.php`: shared local config loader and DB helper
- `config/local.example.php`: versioned config shape
- `config/local.php`: ignored local values file
- `index.php`: manual product create form
- `describe.php`: one-shot AI description helper
- `productos_bulk_update.php`: queue intake and worker log viewer
- `productos_modificados.php`: review processed items
- `worker_bulk.php`: batch generator and DB updater
- `inc/*`: shared layout, prompts, AJAX helpers
- `db/conn.php`: shared DB connection for web pages
- `logs/*`: runtime debug output from worker and AI calls