---
phase: 01-media-folders-plugin
plan: 01
subsystem: media
tags: [wordpress, plugin, taxonomy, ajax, vanilla-js]

requires: []
provides:
  - Custom taxonomy media_folder (hierarchical)
  - AJAX CRUD endpoints for folder management
  - Folder tree sidebar UI (vanilla JS)
affects: [02-media-library-grid, 03-media-modal]

tech-stack:
  added: []
  patterns: [custom taxonomy for virtual folders, MFP_ class prefix, vanilla JS UI]

key-files:
  created:
    - wp-content/plugins/media-folder-pro/media-folder-pro.php
    - wp-content/plugins/media-folder-pro/includes/class-taxonomy.php
    - wp-content/plugins/media-folder-pro/includes/class-ajax-handler.php
    - wp-content/plugins/media-folder-pro/assets/css/admin.css
    - wp-content/plugins/media-folder-pro/assets/js/folder-tree.js
  modified: []

key-decisions:
  - "Plugin renamed to media-folder-pro (user request)"
  - "Author set to Project Pro (https://www.project-pro.pl)"
  - "Vanilla JS instead of jQuery for tree UI"
  - "MFP_ prefix for all classes and constants"

patterns-established:
  - "MFP_Taxonomy centralizes all taxonomy operations"
  - "MFP_Ajax_Handler with nonce + capability check on every endpoint"
  - "Assets loaded only on upload.php and media-new.php"
  - "CustomEvent 'mfp-folder-selected' for cross-component communication"

duration: ~15min
started: 2026-03-28
completed: 2026-03-28
---

# Phase 1 Plan 01: Plugin Foundation + Taxonomy Summary

**WordPress plugin "Media Folder Pro" with hierarchical media_folder taxonomy, 5 AJAX CRUD endpoints, and vanilla JS folder tree sidebar UI.**

## Performance

| Metric | Value |
|--------|-------|
| Duration | ~15min |
| Tasks | 3 completed |
| Files created | 5 |

## Acceptance Criteria Results

| Criterion | Status | Notes |
|-----------|--------|-------|
| AC-1: Plugin aktywuje sie bez bledow | Pass | Plugin header, taxonomy registration, autoload — all correct |
| AC-2: CRUD folderow dziala przez AJAX | Pass | 5 endpoints with nonce verification + capability check |
| AC-3: Drzewko folderow renderuje sie poprawnie | Pass | Sidebar with tree, context menu, inline rename, expand/collapse |

## Accomplishments

- Custom taxonomy `media_folder` registered for `attachment` post type (hierarchical, hidden UI, REST enabled)
- 5 AJAX endpoints: create, rename, delete, move, get_folders — all with security checks
- Folder tree sidebar with context menu (right-click), inline rename, expand/collapse, active state

## Files Created/Modified

| File | Change | Purpose |
|------|--------|---------|
| `wp-content/plugins/media-folder-pro/media-folder-pro.php` | Created | Main plugin file — singleton, hooks, asset loading |
| `wp-content/plugins/media-folder-pro/includes/class-taxonomy.php` | Created | MFP_Taxonomy — register, get_folder_tree, folder_has_children, would_create_cycle |
| `wp-content/plugins/media-folder-pro/includes/class-ajax-handler.php` | Created | MFP_Ajax_Handler — 5 AJAX endpoints with validation |
| `wp-content/plugins/media-folder-pro/assets/css/admin.css` | Created | Sidebar layout, tree styles, context menu, responsive |
| `wp-content/plugins/media-folder-pro/assets/js/folder-tree.js` | Created | Vanilla JS folder tree — CRUD, context menu, inline edit |

## Decisions Made

| Decision | Rationale | Impact |
|----------|-----------|--------|
| Plugin renamed to media-folder-pro | User request | All references use MFP_ prefix |
| Author: Project Pro | User request | Plugin header and URI set |
| Vanilla JS (no jQuery) | Modern, no dependency | Simpler, lighter bundle |
| Empty-folder-only delete | Safety — prevent accidental data loss | Users must move content before deleting |

## Deviations from Plan

### Summary

| Type | Count | Impact |
|------|-------|--------|
| Scope changes | 1 | Plugin name change — no functional impact |

**Total impact:** Naming only, no functional deviation.

### Details

1. **Plugin renamed** from `rm2-media-folders` to `media-folder-pro` per user request during APPLY. All class prefixes changed from `RM2_Media_Folders_` to `MFP_`.

## Issues Encountered

None

## Next Phase Readiness

**Ready:**
- Taxonomy registered and operational
- AJAX infrastructure in place (all endpoints working)
- Folder tree UI renders with full CRUD
- `mfp-folder-selected` CustomEvent dispatched on folder click (Phase 2 hooks here)
- CSS sidebar pushes main content via `margin-left`

**Concerns:**
- Folder filtering not yet connected to WP media query (Phase 2 scope)
- Drag & drop not implemented (Phase 2 scope)
- No i18n .pot file generated yet (Phase 4)

**Blockers:**
- None

---
*Phase: 01-media-folders-plugin, Plan: 01*
*Completed: 2026-03-28*