README

Enterprise-grade media file replacement, safe staging, and SEO-preservation for Drupal 11.

The LEAP File Manager solves the "Versioned Filename" problem in Drupal Core. By default, when you replace a file in Drupal, it creates a new file record (e.g., image_0.jpg), which destroys SEO backlinks and results in stale assets on the disk.

This module provides a robust orchestrator that performs physical file overwrites, allowing you to update media content while maintaining 100% identical URLs for SEO longevity.

✨ Key Features

• SEO Preservation: Physically overwrites existing files to maintain identical URLs.
• Safe Staging: Replacement files are stored in a secure, non-public directory until the Media entity is officially Published.
• "Chameleon" UI: Injects a custom replacement upload container directly into standard Media forms.
• Surgical Lockdown: Prevents editors from accidentally deleting "Live" files via the standard Drupal widget.
• Dual-Engine Transfer: Hot-swaps between DrupalNativeTransfer (for private stream wrappers) and ManualTransfer (native PHP logic for Docker/DDEV/Restricted environments).
• Auto Cache-Busting: Appends a persistent ?v=[mtime] timestamp to images and document links to force browser/CDN refreshes without a hard refresh.
• Ghost File Protection: A 3-layer defense system that prevents physical file deletion if the replacement file is missing from the server.
• Metadata Merging: Automatically flushes stale image dimensions and focal point data during replacement to ensure native thumbnail regeneration.

🛠️ Requirements

• Drupal: ^11.3
• PHP: >=8.3
• Modules: media, file, content_moderation (optional but recommended).

🚀 Installation & Setup

1. Enable the Module:

   ddev drush en leap_file_manager

2. Apply the Fields Recipe: The module uses a "Double-Key" opt-in system. It will not touch any media type unless it has the internal tracker field attached. Run the provided recipe to attach these fields to your bundles:

   ddev drush recipe modules/custom/leap_file_manager/recipes/leap_file_manager

3. Configure Storage: Go to /admin/config/media/leap-file-manager to choose whether to use the private:// stream wrapper or a custom public fallback directory for staged drafts.

🏗️ Architecture & Logic

1. The "Double-Key" Opt-in (isManaged)

The module is designed to be non-intrusive. It evaluates every media entity via the isManaged() method:

• Key 1: Does the Media bundle have the field_leap_staged_file tracker?
• Key 2: Does the Media bundle have a valid physical file source field (e.g., Image or File)?

If both keys aren't present, the module bails out, allowing standard Drupal behavior to take over.

2. Field Definitions

3. The "Chameleon" Form UI

When editing a managed Media entity, the MediaFormHandler performs a "Surgical Lockdown":

• The Remove button on the original file widget is hidden.
• The Alt/Title fields are made non-required at the widget level to allow saves during replacement.
• A "Replace File" details container is injected at the bottom of the source field.

4. The 3-Layer Ghost File Defense

To prevent accidental data loss (deleting the old file when the new one is missing), the module implements:

1. The Shield: Form validation blocks the "Publish" action if the staged file is missing from the disk.
2. The Safety Net: The orchestrator reorders operations to move the new file before deleting the old one.
3. The Broom: If a move fails, the orchestrator detaches the broken FID from the entity to prevent a loop of errors.

👨‍💻 Developer Information

Custom Strategies

The module uses the Strategy Pattern to handle different media types.

• ImageStrategy: Handles dimension clearing (width/height) and Image Style flushing.
• FileStrategy: Handles generic thumbnails and icons for PDFs/Documents.

Transfer Engines

• DrupalNativeTransfer: Uses FileRepository::move. Best for sites with a properly configured private:// system and standard directory permissions.
• ManualTransfer: Uses native PHP rename() and direct SQL updates. This is the "Sledgehammer" engine designed to bypass brittle stream wrapper permission issues in heavily restricted or deeply nested public-folder environments.

Cache Busting

The module implements hook_preprocess_image and hook_preprocess_file_link. It calculates the physical filemtime of the source file and appends it as a query string (?v=12345). This ensures that as soon as a file is replaced, every visitor to the site sees the updated version immediately.

🛡️ License

This module is part of the Splash Frog Ecosystem, the Drupal Ecosystem, and is provided under the GPL-2.0-or-later License.