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Example code of dandoetech/laravel-bff

Informations about the package laravel-bff

Laravel BFF

Pre-release — Architecture by senior tech lead, implementation largely AI-assisted with human review. Not fully reviewed. Architecture may change before v1.0.0.

Serves frontend-ready UI metadata from the Resource Registry via REST endpoints. Applies policy-based capabilities and visibility rules so the frontend knows what the current user can see and do.

Installation

The service provider is auto-discovered. Publish the config:

Requires dandoetech/laravel-resource-registry.

Quick Start

With resources defined and registered, the metadata endpoints are available immediately:

List Response

Single Resource Response

Computed fields (like category_name) appear as read-only table columns, excluded from forms.

Decorator Chain

Metadata flows through a decorator chain before reaching the frontend:

  1. DefaultMetadataBuilder — derives widgets, table, forms, actions from the resource definition
  2. VisibilityDecorator — applies visibility rules (e.g., hide audit fields from non-admins)
  3. PolicyDecorator — evaluates user permissions, adds capabilities, marks/removes fields

Visibility Rules

Implement VisibilityRuleInterface to filter metadata based on runtime context:

Register in config:

Policy Evaluator

The default GatePolicyEvaluator uses Laravel Gates to check permissions:

Results are injected into extensions.capabilities. Fields with edit: false are marked read-only; fields with view: false are removed entirely.

Swap the evaluator by implementing PolicyEvaluatorInterface:

Configuration

config/ddt_bff.php:

To scope metadata to authenticated users, add auth middleware to the route group in your app.

API Overview

Class Purpose
BffServiceProvider Binds decorated MetadataProviderInterface, registers routes
MetadataController index() lists resources, show() returns full metadata
PolicyDecorator Adds capabilities from policy evaluator, enforces field-level access
VisibilityDecorator Applies visibility rules in sequence
GatePolicyEvaluator Default evaluator using Laravel Gates
PolicyEvaluatorInterface Contract for custom auth adapters
VisibilityRuleInterface Contract for custom visibility rules

Testing

License

MIT

All versions of laravel-bff with dependencies

PHP Build Version
Package Version
Requires php Version ^8.2
illuminate/auth Version ^11.0 || ^12.0
illuminate/cache Version ^11.0 || ^12.0
illuminate/contracts Version ^11.0 || ^12.0
illuminate/http Version ^11.0 || ^12.0
illuminate/routing Version ^11.0 || ^12.0
illuminate/support Version ^11.0 || ^12.0
dandoetech/bff-metadata Version ^0.1 || ^0.2
dandoetech/resource-registry Version ^0.1 || ^0.2
dandoetech/laravel-resource-registry Version ^0.1 || ^0.2
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