---
phase: 03-media-modal
plan: 01
subsystem: media
tags: [wordpress, media-modal, backbone-extend, upload-hook, wp-uploader]

requires:
  - phase: 02-media-library-grid
    provides: MFP_Media_Query filter, mfp_assign_media endpoint
provides:
  - Folder dropdown in wp.media modal
  - Modal filtering via backbone props
  - Auto-assign uploads to active folder
  - mfp_upload_to_folder lightweight endpoint
affects: [04-polish-ux]

tech-stack:
  added: []
  patterns: [wp.media.view.AttachmentsBrowser.extend, wp.Uploader.queue hook, modal close hook, foldersCache pattern]

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

key-decisions:
  - "Extend AttachmentsBrowser.prototype.createToolbar — call original then add dropdown"
  - "Flat <select> dropdown instead of full tree in modal — lightweight, less DOM"
  - "Hierarchical indent via em-space prefix in option labels"
  - "Cache folders per modal open, invalidate on close"
  - "Dual upload hook: wp.Uploader.queue + Attachment.sync override for reliability"
  - "enqueue_modal_assets on all admin pages except upload.php (handled separately)"

patterns-established:
  - "mfp-folder-changed CustomEvent for cross-module sync"
  - "Modal close → foldersCache invalidation + counter refresh"
  - "Inline script registration (wp_register_script false) for mfpData on non-media pages"

duration: ~10min
started: 2026-03-28
completed: 2026-03-28
---

# Phase 3 Plan 01: Media Upload Modal Integration Summary

**Folder dropdown filter in wp.media modal with auto-assign on upload, using AttachmentsBrowser.extend and wp.Uploader hooks.**

## Performance

| Metric | Value |
|--------|-------|
| Duration | ~10min |
| Tasks | 2 completed |
| Files created | 1 |
| Files modified | 4 |

## Acceptance Criteria Results

| Criterion | Status | Notes |
|-----------|--------|-------|
| AC-1: Dropdown folderow widoczny w modalu | Pass | AttachmentsBrowser toolbar extended with select |
| AC-2: Filtrowanie mediow w modalu | Pass | library.props.set via same MFP_Media_Query filter |
| AC-3: Przypisanie folderu przy uploadzie | Pass | wp.Uploader.queue + Attachment.sync hooks |

## Accomplishments

- Extended `wp.media.view.AttachmentsBrowser.createToolbar` to inject folder dropdown
- Hierarchical folder list with em-space indent and counts in dropdown options
- Upload auto-assign via dual hooks (wp.Uploader.queue change:status + Attachment.sync)
- `mfp_upload_to_folder` lightweight single-file endpoint
- Modal close triggers `mfp-folder-changed` event → folder-tree.js refreshes counters
- `enqueue_modal_assets()` loads on all admin pages where media-views is present

## Files Created/Modified

| File | Change | Purpose |
|------|--------|---------|
| `assets/js/modal-integration.js` | Created | Modal dropdown, filtering, upload auto-assign, close sync |
| `includes/class-ajax-handler.php` | Modified | Added mfp_upload_to_folder endpoint |
| `assets/js/folder-tree.js` | Modified | Added mfp-folder-changed listener |
| `assets/css/admin.css` | Modified | Modal dropdown styles |
| `media-folder-pro.php` | Modified | enqueue_modal_assets + modal JS enqueue on upload.php |

## Decisions Made

| Decision | Rationale | Impact |
|----------|-----------|--------|
| Extend prototype vs filter hook | More reliable, works across all modal instances | Robust integration |
| Flat select vs tree in modal | Modal space is limited, select is native WP pattern | Consistent UX |
| Dual upload hooks | Different WP versions trigger differently | Reliable across WP 6.0+ |

## Deviations from Plan

None — plan executed exactly as written.

## Issues Encountered

None

## Next Phase Readiness

**Ready:**
- Full modal integration operational
- All 7 AJAX endpoints in place
- Core feature set complete for MVP
- Phase 4 can focus purely on UX polish

**Concerns:**
- List view (table mode) still unhandled
- No keyboard navigation in modal dropdown

**Blockers:**
- None

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