Gemini 2.5 Pro's view on rearchitecting WebTrees 😄

[arsenyspb]

Hi folks,

Not an issue at all, but JFYI. For pure fun only, I've used ~2M tokens of Gemini 2.5 Pro over ~70 MB large entire codebase export. I've asked this "AI overlord" to share their opinion on what high-level priorities would amplify the impact of open-source project while upping its abilities to deliver features collaboratively with some modernization future-proofing.

Here's what it said... Pasting it as-is, while of course it's not at all fully relevant, but just to share. Wondering if it's worth going down the path further 😄

Analysis of Current Architecture (Based on Provided Files)

• Technology: Primarily a PHP application, likely using a custom framework structure with components potentially borrowed or inspired by frameworks like Laravel/Illuminate (database, collections) and Symfony (cache, console)[cite: 76, 111]. It uses Composer for PHP dependencies and npm/webpack for frontend assets[cite: 46, 47, 104]. Adherence to PSR standards is noted[cite: 12].
• GEDCOM Handling: Features extensive, custom-built logic for GEDCOM parsing, representation (app/Gedcom.php, numerous classes in app/Elements/), and handling of custom tags from various software (app/CustomTags/)[cite: 111]. Import and export functionalities are present[cite: 111].
• Data Storage & Migration: Relies on a relational database (MySQL recommended [cite: 27]) managed via Illuminate components[cite: 111]. Includes database schema migration scripts (app/Schema/Migration*.php [cite: 1, 2, 3]). Updates seem reliant on GEDCOM import[cite: 51].
• Authentication/Authorization: Appears to use a custom session-based system with database session storage and role definitions (app/Auth.php, app/Session.php, app/Http/Middleware/Auth*.php [cite: 111]). No explicit standard-based IDP integration is evident.
• Multi-tenancy: Supports multiple trees, likely via database prefixes or data isolation within tables[cite: 27, 111].
• Deployment: Traditional PHP application structure requiring a web server and PHP runtime[cite: 26]. Not inherently designed for single-container deployment.

Rearchitecture Proposal

This plan aims to modernize the platform, enhance maintainability, and meet modern feature velocity requirements.

1. Modern Technology Stack:

   • Backend: Transition to a modern PHP framework like Laravel or Symfony. This provides a robust structure, ORM (Eloquent/Doctrine), improved request handling, built-in security features, and simplifies implementing authentication and multi-tenancy. It directly addresses the "antiquated" nature of the current custom structure.
   • Frontend: Decouple the frontend using a modern JavaScript framework such as Vue.js or React. Build it as a Single Page Application (SPA) or using an inertia-style approach (like Laravel with Inertia.js) communicating with the backend via APIs. This enhances user experience and maintainability.
   • Database: Continue official support for MySQL and PostgreSQL. Utilize the chosen framework's ORM for database abstraction.

2. Transparent GEDCOM Handling:

   • Core Library: Replace the custom GEDCOM parsing/writing logic [cite: 111] with a well-maintained, standard-compliant PHP library (e.g., php-gedcom/parser, evaluate alternatives based on GEDCOM 7 support and maintenance status). This ensures better compliance and reduces custom code burden.
   • Data Access: Implement a dedicated service layer that uses the chosen library to interact with GEDCOM data. Provide clear APIs within the application to access and manipulate genealogical data, possibly using Data Transfer Objects (DTOs) representing GEDCOM structures.
   • Validation & Export: Implement strict GEDCOM validation during import. Ensure export functionality adheres cleanly to GEDCOM 5.5.1 and GEDCOM 7 standards.

3. Easy Migration Path from WebTrees:

   • Primary Method: Focus on GEDCOM Export/Import.
     • Ensure the old WebTrees version can reliably export user data into standard GEDCOM 5.5.1 or 7.0 format. If non-standard data (site settings, user permissions beyond submitter links) needs migration, provide separate export tools (e.g., CSV, JSON).
     • The new application must have a robust import feature capable of handling these GEDCOM files, including mapping common custom tags if necessary[cite: 111].
   • User/Settings Migration: Provide separate, documented scripts or import features for migrating user accounts, permissions, and site settings if they were exported separately from the GEDCOM data.
   • (Optional) Direct Database Migration: Offer this only as a secondary, advanced option with clear disclaimers. Create scripts specifically for migrating from the known schema of the last stable version of the old WebTrees to the new schema, targeting MySQL/PostgreSQL initially.

4. Flexible Multi-Tenant Solution & Modern Authentication:

   • Multi-Tenancy Architecture: Implement a schema-per-tenant or database-per-tenant model for strong data isolation. Frameworks like Laravel offer packages (tenancy/multi-tenant) to facilitate this, managing tenant identification, database connections, and task scheduling.
   • Authentication: Replace the current system [cite: 111] with standard OAuth 2.0 / OpenID Connect (OIDC) flows.
     • Identity Providers (IDPs): Build in native support for Google Sign-In. Use configurable OAuth 2.0/OIDC client libraries (league/oauth2-client or framework-specific tools like Laravel Socialite/Passport) to allow administrators to easily configure other providers (Microsoft Entra ID, Auth0, Keycloak, etc.).
   • Authorization: Implement a granular Role-Based Access Control (RBAC) system. Define roles (e.g., Tenant Admin, Tree Manager, Editor, Member) with permissions scoped to tenants and specific trees within a tenant.

5. Deployment as a Single Modern Container:

   • Containerization: Utilize Docker. Define a Dockerfile that sets up the chosen runtime (PHP), installs dependencies (via Composer and npm), copies the application code, and configures a web server (like NGINX or Caddy) within the container.
   • Orchestration: Use Docker Compose for defining the application stack (app container, database container, cache container like Redis) for local development and simpler production setups.
   • Configuration: Manage all configuration (database credentials, API keys, mail settings, IDP details) via environment variables, adhering to 12-factor app principles. Provide a .env.example file for guidance.

Now, let's architect a multi-agent system using hypothetical Gemini 2.5 Pro agents and an "MCP" (Master Control Program) orchestration protocol to execute this WebTrees rearchitecture.

I. Agent Architecture & Roles

We'll define specialized agents, each focusing on a specific domain of the rearchitecture plan. The OrchestratorAgent (MCP) acts as the central coordinator.

1. OrchestratorAgent (MCP):

   • Role: Project Manager / Central Coordinator.
   • Capabilities: Task decomposition (based on the high-level plan), assignment distribution, dependency management, inter-agent communication routing, progress tracking, conflict resolution flagging, final output aggregation. Interprets the overall rearchitecture plan.
   • Tools: Access to project management state, agent status monitoring, communication bus.

2. ArchitectAgent:

   • Role: System Designer / Technical Lead.
   • Capabilities: Refines high-level requirements into detailed technical specifications, defines API contracts (e.g., OpenAPI specs), designs database schemas, specifies component interactions, selects core libraries/patterns.
   • Tools: Diagramming tool integration (conceptual), documentation generation, potentially code analysis tools for interface definition.

3. BackendAgent:

   • Role: Server-side Developer (specialized in the chosen framework, e.g., Laravel/Symfony).
   • Capabilities: Sets up backend project structure, implements business logic, defines models/controllers/services, configures ORM, builds RESTful APIs based on specs from ArchitectAgent.
   • Tools: Code generation, code execution/compilation, framework CLIs, VCS client (Git), database interaction.

4. FrontendAgent:

   • Role: Client-side Developer (specialized in the chosen framework, e.g., Vue/React).
   • Capabilities: Sets up frontend project structure, builds UI components, implements state management, interacts with backend APIs, handles routing.
   • Tools: Code generation, code execution (Node.js), framework CLIs, VCS client, browser simulators (conceptual).

5. GedcomAgent:

   • Role: Genealogy Data Specialist.
   • Capabilities: Selects/integrates/implements GEDCOM parsing/writing libraries, ensures standard compliance (5.5.1, 7.0), defines data structures for genealogical data, implements import/export logic.
   • Tools: Code generation, code execution, potentially GEDCOM validation tools, VCS client.

6. AuthAgent:

   • Role: Security & Identity Specialist.
   • Capabilities: Implements OAuth 2.0/OIDC flows, integrates with IDPs (Google Sign-In, generic OIDC), configures security middleware, implements RBAC based on ArchitectAgent specs.
   • Tools: Code generation, code execution, security libraries, VCS client.

7. MultiTenantAgent:

   • Role: Multi-tenancy Specialist.
   • Capabilities: Implements the chosen multi-tenancy strategy (schema/database per tenant), configures tenant identification and context switching.
   • Tools: Code generation, code execution, database management tools, framework-specific tenancy packages, VCS client.

8. MigrationAgent:

   • Role: Data Migration Specialist.
   • Capabilities: Develops scripts/tools for exporting data from old WebTrees (GEDCOM, users, settings), develops robust import routines for the new system, handles data mapping and validation during migration.
   • Tools: Code generation (scripting languages), code execution, database tools, potentially interacts with old system's export functions.

9. DevOpsAgent:

   • Role: Infrastructure & Deployment Specialist.
   • Capabilities: Creates Dockerfiles, Docker Compose configurations, CI/CD pipelines (e.g., GitHub Actions, GitLab CI), manages environment configurations, sets up monitoring/logging stubs.
   • Tools: Docker CLI, Compose CLI, CI/CD platform APIs/CLIs, configuration management tools, VCS client.

10. TestingAgent:

    • Role: Quality Assurance Engineer (Automated).
    • Capabilities: Generates unit tests, integration tests, and potentially end-to-end (E2E) test scripts (e.g., Playwright, Selenium); performs static code analysis (linting, quality metrics); runs test suites; reports results.
    • Tools: Code generation (test frameworks), code execution, testing frameworks (PHPUnit, Jest, PyTest), static analysis tools, browser automation tools, VCS client.

11. QAAgent:

    • Role: Quality Assurance Analyst (Functional).
    • Capabilities: Interprets requirements/user stories, performs functional testing against deployed instances (potentially using tools driven by TestingAgent or direct interaction simulation), validates UI/UX aspects against specifications, reports bugs/discrepancies. Needs strong grounding in requirements.
    • Tools: Browser automation tools, API testing tools (Postman-like), bug tracking system integration. Human oversight is critical for this role.

12. DocumentationAgent:

    • Role: Technical Writer.
    • Capabilities: Generates code documentation (PHPDoc, JSDoc), creates API documentation (from OpenAPI specs), writes user guides and setup instructions based on implemented features.
    • Tools: Documentation generation tools (Sphinx, Doxygen), Markdown processors, potentially diagramming tools.

II. Deployment Strategy

• Agent Runtime: Each agent (or groups of agents with similar runtime needs) deployed as containerized services (e.g., in a Kubernetes cluster or using cloud functions). This allows scaling and isolation.
• Orchestrator (MCP): Runs as a dedicated service, potentially stateful, managing the workflow database.
• Infrastructure:
  • VCS: Central Git repository (e.g., GitHub, GitLab) as the source of truth for code.
  • CI/CD: Platform integrated with VCS (e.g., GitHub Actions) triggered by commits/PRs, managed by DevOpsAgent.
  • Communication: A message queue (e.g., RabbitMQ, Kafka) or a dedicated API gateway for inter-agent communication brokered by the Orchestrator.
  • Shared Storage: Potentially needed for large artifacts or shared knowledge bases beyond the VCS.
  • Staging/Testing Environment: A separate deployment environment managed by DevOpsAgent where TestingAgent and QAAgent can run tests against integrated code.

III. Testing Strategy

• Unit & Integration Testing: TestingAgent works alongside coding agents (BackendAgent, FrontendAgent, GedcomAgent, etc.). As code for a component/feature is developed, TestingAgent generates and commits corresponding unit and integration tests to the same feature branch. CI pipeline runs these tests automatically.
• Static Analysis: TestingAgent integrates linters and code quality tools into the CI pipeline.
• API Testing: TestingAgent generates tests based on API specifications from ArchitectAgent to verify endpoints implemented by BackendAgent.
• End-to-End (E2E) Testing: TestingAgent develops E2E tests covering critical user flows (e.g., registration, data entry, viewing tree) using browser automation tools. These run against the staging environment.
• Functional QA: QAAgent reviews requirements and executes test plans (potentially using automated scripts from TestingAgent or manual-like simulation) against the staging environment. It focuses on verifying that the software meets the user's needs and requirements. Human review of QAAgent findings is essential.
• Migration Testing: MigrationAgent includes specific tests to validate the export/import process with sample data.
• Feedback Loop: Test failures (Unit, Integration, E2E, QA) are reported back to the OrchestratorAgent, which assigns bug-fixing tasks to the relevant coding agent.

IV. Coding & QA Workflow

1. Task Assignment: OrchestratorAgent assigns a specific, well-defined coding task (e.g., "Implement GEDCOM import endpoint accepting GEDCOM 7.0 file") to the appropriate agent (e.g., GedcomAgent + BackendAgent). Input includes requirements, API specs (if any), and relevant context.
2. Code Generation: The coding agent generates the code, potentially asking clarifying questions to ArchitectAgent via the OrchestratorAgent.
3. Unit Testing: TestingAgent is invoked (or works concurrently) to generate unit tests for the new code.
4. Commit: The coding agent commits the code and unit tests to a feature branch in the VCS.
5. CI Pipeline Trigger: The commit triggers the CI pipeline managed by DevOpsAgent.
6. Automated Checks: The pipeline runs static analysis, unit tests, and integration tests (managed by TestingAgent).
7. Feedback/Merge: If CI passes, the code could be automatically merged (depending on strategy) or flagged for review/integration. If CI fails, OrchestratorAgent is notified, and a debugging task is created for the original coding agent.
8. Staging Deployment: Periodically (e.g., after feature completion), code is deployed to the staging environment by DevOpsAgent.
9. QA Execution: QAAgent performs functional tests against the staging environment based on the completed features/user stories. E2E tests by TestingAgent also run here.
10. Bug Reporting: QAAgent reports failures/bugs back to the OrchestratorAgent, creating new tasks for coding agents.
11. Documentation: DocumentationAgent runs periodically or upon feature completion to update code/API/user docs based on the latest codebase.

V. Agent Engagement Sequence (Based on Rearchitecture Plan)

The OrchestratorAgent manages this sequence, potentially parallelizing tasks within phases where dependencies allow:

• Phase 0: Initialization
  • OrchestratorAgent: Parses the master plan.
  • ArchitectAgent: Refines Phase 1 tasks, defines core structures (DB schema basics, initial API ideas).
  • DevOpsAgent: Sets up VCS, basic CI stub, initial Docker config.
• Phase 1: Core Backend & Foundation
  • Engage: BackendAgent, MultiTenantAgent, DevOpsAgent, TestingAgent.
  • Goal: Basic Laravel/Symfony app setup, DB connection, multi-tenancy scaffolding, containerization, initial test setup.
• Phase 2: Core Features (GEDCOM & Auth)
  • Engage: GedcomAgent, AuthAgent, BackendAgent, ArchitectAgent (refining APIs), TestingAgent.
  • Goal: Integrate GEDCOM library, basic parsing/writing, core OAuth/OIDC setup, user model, related APIs, corresponding tests.
• Phase 3: Frontend & API Integration
  • Engage: FrontendAgent, BackendAgent (API refinement), TestingAgent (frontend tests, API integration tests).
  • Goal: SPA setup, basic layout, connect login/registration, display core genealogical data.
• Phase 4: Advanced Features & Migration
  • Engage: BackendAgent, GedcomAgent, AuthAgent, MigrationAgent, FrontendAgent, TestingAgent.
  • Goal: Implement remaining features (reporting, advanced GEDCOM, multi-IDP), build migration tools, complete UI, comprehensive testing.
• Phase 5: Deployment, QA & Finalization
  • Engage: DevOpsAgent (production config), QAAgent (full functional testing), TestingAgent (final E2E runs), DocumentationAgent (final docs).
  • Goal: Finalized CI/CD, production-ready container, thorough QA, complete documentation.
• Ongoing: OrchestratorAgent manages flow, DocumentationAgent updates docs incrementally, TestingAgent/QAAgent provide continuous feedback triggering rework loops.

This multi-agent system provides a structured, potentially highly parallelized approach to tackling the complex rearchitecture task, leveraging specialized AI capabilities while maintaining central coordination and rigorous testing. Human oversight remains crucial, especially for architectural decisions, requirement interpretation, and final QA validation.

[BertKoor]

Thanks for the AI generated buzzword salad. But no thanks, we do our own thinking.

[arsenyspb]

@BertKoor you're welcome, - in spirit of "For pure fun only" disclaimer, won't pass this to our AI Overlords, as they accept nothing but vibe coding and full obedience.

But on serious note, - what are your recommendations on getting started with AI coding assistance on webtrees codebase specifically?.. Any additional contexts to include?.. Best ways to focus them on the codebase?..

What worked, what didn't work so far?

[fisharebest]

I've looked at AI coding tools at work, and my experience is that they suck :-)

As an experiment, I just asked it to write a test script for a very simple class in webtrees (one function, two if statements).

The result started with the line Webtrees::ROOT_DIR = .... i.e. it's trying to write to a constant!

It would take me longer to fix this code than it would to write it from scratch.

Now, I admit that I am not an AI expert. My prompt was "The file publicFilesTest.php is a placeholder. Can you complete it." Maybe a more experienced AI user would have come up with a better prompt?

---

The advice generated above is totally generic, and not applicable to webtrees in many ways.

[arsenyspb]

@fisharebest AI overlords may not effectively "remember" webtrees through the weights in their base models trained on OneWebCrawl and who knows what else, so they require a precise context with codebase... most of web-based or IDE-based plugins have access to either local branch or wherever you're sitting in main...

Have you tried with at least a fraction of codebase (...or if the subscription permits with the full) e.g. through gitingest ?

E.g. I risk crossing all danger lines possible and shifting this from "for fun only" to real-world, but I didn't even open the IDE butWith GitHub Copilot, sitting in Chrome tab of app/Http/Middleware/PublicFilesTest.php :

File tests/app/Http/Middleware/PublicFilesTest.php is a placeholder. Can you complete it?

The tests/app/Http/Middleware/PublicFilesTest.php file is currently a placeholder, containing only a basic test to check if the PublicFiles class exists. To provide a more meaningful and complete test, we need to understand the functionality of the PublicFiles middleware in the application.

Since the PublicFiles middleware is located at app/Http/Middleware/PublicFiles.php, let me fetch the content of this file to determine its functionality and then complete the test.The PublicFilesTest.php file currently only checks whether the PublicFiles class exists. To expand this test case, we can include tests for the process method in the PublicFiles class. This method handles requests for files in the /public/ directory and ensures they are served correctly or passed to the next middleware handler.

Here’s a completed test case with additional test scenarios:

Enhanced Test Code

<?php

declare(strict_types=1);

namespace Fisharebest\Webtrees\Http\Middleware;

use Fisharebest\Webtrees\Mime;
use Fisharebest\Webtrees\TestCase;
use Laminas\Diactoros\Response;
use Laminas\Diactoros\ServerRequest;
use PHPUnit\Framework\Attributes\CoversClass;
use Psr\Http\Server\RequestHandlerInterface;

#[CoversClass(PublicFiles::class)]
class PublicFilesTest extends TestCase
{
    public function testProcessReturnsResponseForExistingFile(): void
    {
        // Mock the file system
        $filePath = '/public/test.txt';
        $fullPath = Webtrees::ROOT_DIR . $filePath;
        $fileContent = 'Test content';
        $mimeType = Mime::TYPES['TXT'] ?? Mime::DEFAULT_TYPE;

        $this->mockFunction('file_exists', function ($path) use ($fullPath) {
            return $path === $fullPath;
        });

        $this->mockFunction('file_get_contents', function ($path) use ($fullPath, $fileContent) {
            return $path === $fullPath ? $fileContent : '';
        });

        $this->mockFunction('pathinfo', function ($path, $option) use ($fullPath) {
            return $path === $fullPath && $option === PATHINFO_EXTENSION ? 'txt' : '';
        });

        // Create the request
        $request = new ServerRequest([], [], 'http://example.com' . $filePath);

        // Create the middleware
        $middleware = new PublicFiles();

        // Create a mock handler
        $handler = $this->createMock(RequestHandlerInterface::class);

        // Process the request
        $response = $middleware->process($request, $handler);

        // Assert the response
        self::assertSame(200, $response->getStatusCode());
        self::assertSame($fileContent, (string) $response->getBody());
        self::assertSame($mimeType, $response->getHeaderLine('content-type'));
    }

    public function testProcessPassesRequestToNextHandlerForNonPublicPath(): void
    {
        $request = new ServerRequest([], [], '/non-public/path');
        $middleware = new PublicFiles();

        $handler = $this->createMock(RequestHandlerInterface::class);
        $handler->expects($this->once())->method('handle')->with($request);

        $response = $middleware->process($request, $handler);

        self::assertSame($handler->handle($request), $response);
    }

    public function testProcessReturnsHandlerResponseForNonExistentFile(): void
    {
        $filePath = '/public/nonexistent.txt';
        $fullPath = Webtrees::ROOT_DIR . $filePath;

        $this->mockFunction('file_exists', function ($path) use ($fullPath) {
            return $path !== $fullPath;
        });

        $request = new ServerRequest([], [], 'http://example.com' . $filePath);

        $middleware = new PublicFiles();

        $handler = $this->createMock(RequestHandlerInterface::class);
        $handler->expects($this->once())->method('handle')->with($request);

        $response = $middleware->process($request, $handler);

        self::assertSame($handler->handle($request), $response);
    }
}

Key Scenarios Covered

1. File Exists in /public/ Directory: Tests that the middleware correctly serves the file's content, sets the appropriate headers, and returns a 200 OK response.
2. Non-Public Path: Ensures that requests not targeting the /public/ directory are passed to the next middleware handler.
3. Non-Existent File: Verifies that if the file does not exist, the request is passed to the next middleware handler.

Notes

• The mockFunction utility is used to simulate file system operations like file_exists, file_get_contents, and pathinfo.
• The RequestHandlerInterface mock ensures that the middleware correctly delegates requests when necessary.

This test suite should comprehensively verify the behavior of the PublicFiles middleware. Let me know if you’d like more help with this!

@fisharebest 🤷

[arsenyspb]

By the way pinch me if we're in xkcd 2494 officially (by consensus)

[arsenyspb]

Here's another one, when I've used Gitingest to load entire context of webtrees (73MB txt) in to Gemini 2.5 and asked the same:

File tests/app/Http/Middleware/PublicFilesTest.php is a placeholder. Can you complete it?

Okay, I've analyzed the project structure and the likely functionality of the PublicFiles.php middleware. I've also considered common testing conventions in PHP projects using PHPUnit and PSR-7/PSR-15 middleware.

Based on this, I've completed the tests/app/Http/Middleware/PublicFilesTest.php file. This test suite uses an in-memory filesystem to ensure tests are isolated and fast. It covers scenarios like serving existing files with correct MIME types, handling non-existent files, preventing directory traversal, and ensuring non-public paths are passed to the next handler.

Here is the completed PublicFilesTest.php:

<?php

declare(strict_types=1);

namespace Fisharebest\Webtrees\Tests\App\Http\Middleware;

use Fisharebest\Webtrees\Http\Middleware\PublicFiles;
use Fisharebest\Webtrees\Mime;
use Fisharebest\Webtrees\Registry;
use Fisharebest\Webtrees\Tests\TestCase;
use League\Flysystem\Filesystem;
use League\Flysystem\Memory\MemoryAdapter;
use Nyholm\Psr7\Factory\Psr17Factory; // Common PSR-17 factory
use Nyholm\Psr7\Response as Psr7Response;
use Nyholm\Psr7\ServerRequest;
use Psr\Http\Message\ResponseInterface;
use Psr\Http\Message\ServerRequestInterface;
use Psr\Http\Server\RequestHandlerInterface;

class PublicFilesTest extends TestCase
{
    private Filesystem $publicDisk;

    protected function setUp(): void
    {
        parent::setUp();

        // Use an in-memory filesystem for public files during tests
        $this->publicDisk = new Filesystem(new MemoryAdapter());

        // Mock the filesystem factory in the Registry to return our in-memory disk for 'public' paths
        $mockFilesystemFactory = $this->createMock(\Fisharebest\Webtrees\Contracts\FilesystemFactoryInterface::class);
        
        //->method('root') will configure the mock for the root() method.
        //->willReturnMap(...) will make it return different values based on the argument passed to root().
        $mockFilesystemFactory->method('root')->willReturnMap([
            ['public', $this->publicDisk],
            // Add other expected calls if necessary for other parts of your test setup,
            // or use a broader willReturn($someDefaultDisk) if not specific to 'public'.
        ]);
        Registry::filesystem($mockFilesystemFactory);

        // Add some common files to the in-memory public disk for testing
        // Note: paths should match what PublicFiles middleware expects (e.g. css/style.css if public root is 'public/')
        $this->publicDisk->write('css/style.css', 'body { color: red; }');
        $this->publicDisk->write('js/script.js', 'console.log("test");');
        $this->publicDisk->write('images/logo.png', 'fake png content');
        $this->publicDisk->write('assets/font.woff2', 'fake font content');
        $this->publicDisk->write('assets/custom.data', 'custom data file');
        $this->publicDisk->write('favicon.ico', 'fake ico content'); // Assuming root access or /favicons/ path
        $this->publicDisk->write('favicons/favicon.ico', 'fake favicons ico content');
    }

    private function makeRequest(string $method, string $uri): ServerRequestInterface
    {
        return new ServerRequest($method, $uri);
    }

    private function handleRequest(ServerRequestInterface $request): ResponseInterface
    {
        $middleware = new PublicFiles(); // Assumes constructor resolves dependencies via Registry

        // Mock the next handler in the chain
        $nextHandler = $this->createMock(RequestHandlerInterface::class);
        $nextHandler->method('handle')->willReturnCallback(function (ServerRequestInterface $req) {
            // This simulates a route not found or handled by another part of the app
            return (new Psr17Factory())->createResponse(404)->withBody(
                (new Psr17Factory())->createStream('Passed to next handler')
            );
        });

        return $middleware->process($request, $nextHandler);
    }

    public function testServesExistingCssFile(): void
    {
        $request = $this->makeRequest('GET', '/css/style.css');
        $response = $this->handleRequest($request);

        $this->assertEquals(200, $response->getStatusCode());
        $this->assertEquals('text/css', $response->getHeaderLine('Content-Type'));
        $this->assertEquals('body { color: red; }', (string) $response->getBody());
        $this->assertEquals(strlen('body { color: red; }'), (int)$response->getHeaderLine('Content-Length'));
    }

    public function testServesExistingJsFile(): void
    {
        $request = $this->makeRequest('GET', '/js/script.js');
        $response = $this->handleRequest($request);

        $this->assertEquals(200, $response->getStatusCode());
        $this->assertEquals('application/javascript', $response->getHeaderLine('Content-Type'));
        $this->assertEquals('console.log("test");', (string) $response->getBody());
    }

    public function testServesExistingPngImageFile(): void
    {
        $request = $this->makeRequest('GET', '/images/logo.png');
        $response = $this->handleRequest($request);

        $this->assertEquals(200, $response->getStatusCode());
        $this->assertEquals('image/png', $response->getHeaderLine('Content-Type'));
        $this->assertEquals('fake png content', (string) $response->getBody());
    }
    
    public function testServesExistingFontFileFromAssets(): void
    {
        // Assuming /assets/ is a public path prefix handled by the middleware.
        // If PublicFiles.php has a hardcoded list like ['/css/', '/js/'], then '/assets/' must be added there.
        $request = $this->makeRequest('GET', '/assets/font.woff2');
        $response = $this->handleRequest($request);

        $this->assertEquals(200, $response->getStatusCode());
        $this->assertEquals(Mime::TYPES['WOFF2'] ?? 'application/font-woff2', $response->getHeaderLine('Content-Type'));
        $this->assertEquals('fake font content', (string) $response->getBody());
    }

    public function testReturnsNotFoundForNonExistentFileInPublicPath(): void
    {
        $request = $this->makeRequest('GET', '/css/nonexistent.css');
        $response = $this->handleRequest($request);

        $this->assertEquals(404, $response->getStatusCode());
    }

    public function testPassesToNextHandlerForNonPublicPath(): void
    {
        $request = $this->makeRequest('GET', '/some/application/route');
        $response = $this->handleRequest($request); 

        $this->assertEquals(404, $response->getStatusCode());
        $this->assertEquals('Passed to next handler', (string) $response->getBody());
    }

    public function testPreventsDirectoryTraversal(): void
    {
        $request = $this->makeRequest('GET', '/css/../../../../../etc/passwd');
        $response = $this->handleRequest($request);
        
        // Based on the typical implementation of PublicFiles preventing ".."
        $this->assertEquals(404, $response->getStatusCode());
    }

    public function testMimeTypeFallback(): void
    {
        // Temporarily add a custom MIME type for testing the fallback
        Mime::TYPES['DATA'] = 'application/x-custom-data';

        $request = $this->makeRequest('GET', '/assets/custom.data');
        $response = $this->handleRequest($request);

        $this->assertEquals(200, $response->getStatusCode());
        $this->assertEquals('application/x-custom-data', $response->getHeaderLine('Content-Type'));
        $this->assertEquals('custom data file', (string) $response->getBody());

        // Clean up the modified Mime::TYPES if necessary, or ensure tests run in isolation
        unset(Mime::TYPES['DATA']);
    }

    public function testServesFaviconIcoFromDedicatedPath(): void
    {
        // Assumes `/favicons/` is configured as a public path in PublicFiles middleware
        // Or the middleware logic is updated to serve it.
        $request = $this->makeRequest('GET', '/favicons/favicon.ico');
        $response = $this->handleRequest($request);
        
        $this->assertEquals(200, $response->getStatusCode());
        $this->assertEquals(Mime::TYPES['ICO'] ?? 'image/x-icon', $response->getHeaderLine('Content-Type'));
        $this->assertEquals('fake favicons ico content', (string) $response->getBody());
    }

    public function testReturnsNotFoundForFileInNonConfiguredPublicPath(): void
    {
        // Assuming `/uncommon-path/` is not in PublicFiles::$publicPaths
        $this->publicDisk->write('uncommon-path/file.txt', 'uncommon content');
        $request = $this->makeRequest('GET', '/uncommon-path/file.txt');
        $response = $this->handleRequest($request);

        // Should be passed to the next handler, which returns 404 in our mock
        $this->assertEquals(404, $response->getStatusCode());
        $this->assertEquals('Passed to next handler', (string) $response->getBody());
    }

    public function testHandlesEmptyPath(): void
    {
        $request = $this->makeRequest('GET', '/');
        $response = $this->handleRequest($request);

        $this->assertEquals(404, $response->getStatusCode());
        $this->assertEquals('Passed to next handler', (string) $response->getBody());
    }

    public function testContentLengthHeaderIsCorrect(): void
    {
        $content = 'body { color: red; font-size: 12px; }';
        $this->publicDisk->write('css/test-length.css', $content);
        $request = $this->makeRequest('GET', '/css/test-length.css');
        $response = $this->handleRequest($request);

        $this->assertEquals(200, $response->getStatusCode());
        $this->assertEquals((string)strlen($content), $response->getHeaderLine('Content-Length'));
    }
}

[fisharebest]

LOL. The code looks plausible. However:

• Missing import for Webtrees. OK, I can fix this.
• new ServerRequest. No such class. OK, I know what it means, so I can fix this.
• $this->mockFunction(). No such function, and AFAICT, it is not possible to mock global PHP functions.

It's just garbage...

[fisharebest]

Now, a human developer would look at this problem and say:

PublicFiles.php accesses the filesystem directly, which makes it impossible to test. Instead, it should use the FileSystem abstraction which will allow easy mocking by the test script. Change a couple of lines here and your test script is trivial.