virtfusion-whmcs-module/CLAUDE.md

CLAUDE.md

This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.

Project Overview

VirtFusion Direct Provisioning Module for WHMCS — a PHP module that integrates WHMCS with the VirtFusion control panel API for automated VPS provisioning, management, and client self-service. No build system or package manager; the module is pure PHP installed by copying modules/servers/VirtFusionDirect/ into a WHMCS installation.

Development & Testing

There is no automated test suite, linter, or build step. Testing is manual:

• Test connection: WHMCS Admin → System Settings → Servers → Test Connection button
• Dry run validation: VirtFusionDirect_validateServerConfig() tests configuration without creating a server
• Module logging: WHMCS Admin → Utilities → Logs → Module Log captures all API calls and responses
• Server object viewer: Admin services tab shows full JSON response from VirtFusion API

Development Rules

• Error handling: Always use try...catch blocks around API calls, database operations, and any code that may throw exceptions. Never let exceptions bubble up unhandled to the user. Log caught exceptions via Log::insert().
• Ownership validation: Every client-facing action MUST verify service ownership via validateUserOwnsService() before performing any operation. Server IDs must be cross-referenced against the authenticated client to prevent cross-customer data access.
• Security: All input must be validated server-side. Never trust client-side validation alone. Cast IDs to (int), validate strings with regex, escape output with htmlspecialchars().
• Control flow: Every $vf->output() call in switch cases must be followed by break. Do not rely on exit() inside output() for flow control.
• HTTP methods: Read-only operations use GET. State-mutating operations (power, rebuild, rename, password reset, credit, VNC toggle) use POST with data in the request body.
• Caching: Use the Cache class for slow-changing API responses. Never cache real-time data (server status, VNC sessions, login tokens) or mutation responses.

Release Process

Releases are triggered by pushing a git tag:

git tag v1.1.0
git push origin v1.1.0

The publish-release.yml workflow creates a GitHub/Gitea release with auto-generated notes from the commit log. Use conventional commits for clear changelogs:

• fix: → patch-level change
• feat: → feature addition
• refactor: → code improvement without behavior change

Architecture

Namespace: WHMCS\Module\Server\VirtFusionDirect

Entry Points

File	Purpose
VirtFusionDirect.php	WHMCS module interface — non-namespaced functions (VirtFusionDirect_CreateAccount(), etc.) that delegate to library classes
client.php	Client-facing AJAX API — authenticated by WHMCS session + service ownership validation. POST for mutations, GET for reads.
admin.php	Admin-facing AJAX API — requires WHMCS admin authentication
hooks.php	WHMCS hooks — checkout validation (OS selection), OS gallery + SSH key UI injection, slider UI for configurable options

Core Classes (in lib/)

Class	Role
Module	Base class with API integration, auth checks, and all feature methods (power, network, VNC, backup, resource, self-service, traffic, rename, password reset). Contains resolveServiceContext() for DRY service lookups and groupOsTemplates() for shared OS category logic.
ModuleFunctions	Extends Module. Service lifecycle: create, suspend, unsuspend, terminate, change package, usage updates, client area rendering.
ConfigureService	Extends Module. Order-time operations: package discovery, OS template fetching, server build initialization, SSH key retrieval and creation.
Database	Static methods for mod_virtfusion_direct table operations and WHMCS DB queries. Auto-creates/migrates schema on first use.
Curl	HTTP client wrapper with Bearer token auth, SSL verification, 30s timeout. Methods: get, post, put, patch, delete. Single-use — each instance makes one request.
Cache	Two-tier caching: Redis (if ext-redis available) with atomic filesystem fallback. TTLs: OS templates 10min, traffic/backups 2min, packages 10min.
ServerResource	Transforms VirtFusion API response into flat key-value format for Smarty templates.
AdminHTML	Static methods generating admin services tab HTML (server ID editor, JSON viewer, action buttons).
Log	Thin wrapper around WHMCS module logging.

Class Hierarchy

ModuleFunctions and ConfigureService both extend Module. Most business logic lives in Module — it handles API calls, auth, validation, and all feature-specific operations. The resolveServiceContext() method provides a standardized way to look up service → WHMCS service → control panel → curl client in a single call, eliminating boilerplate across all API methods.

Client-Side

• templates/overview.tpl — Smarty template for client area (server info, power, network, rebuild with OS gallery, resources with traffic chart, VNC toggle, self-service billing, billing overview, backups timeline, server rename, password reset)
• templates/js/module.js — Vanilla JS + jQuery handling AJAX calls, DOM updates, status badges, power actions, all management UIs. Key helpers: vfUrl() (URL builder), vfShowAlert() (alert display), vfRenderOsGallery() (accordion gallery), vfDrawTrafficChart() (canvas chart)
• templates/js/keygen.js — Client-side SSH Ed25519 key generator using Web Crypto API (loaded on checkout page)
• templates/css/module.css — Cross-theme styles with Bootstrap 3/4/5 dual class support (panel card, panel-body card-body)

Removed Features

• Firewall — Removed (non-functional; rulesets must be created in VirtFusion admin panel)
• IP add/remove buttons — Removed; IPs are managed by VirtFusion during provisioning
• Upgrade/Downgrade link — Removed from resources panel

Data Flow: Server Creation

1. WHMCS calls VirtFusionDirect_CreateAccount() → ModuleFunctions::createAccount()
2. Checks/creates VirtFusion user via external relation ID (WHMCS client ID)
3. Reads configurable options (Package, Location, IPv4, Memory, CPU, Bandwidth, etc.)
4. Dry-run validation → actual API POST to /servers
5. Stores server ID in mod_virtfusion_direct table
6. Updates WHMCS hosting record (IP, username, password, domain)
7. Calls ConfigureService::initServerBuild() with selected OS + SSH key

Custom fields (Initial Operating System, Initial SSH Key) are auto-created by Database::ensureCustomFields() on module load for all products using this module. No manual SQL setup required.

Configurable Option Mapping

Custom option names can be mapped in config/ConfigOptionMapping.php (copy from -example.php). Default mapping keys: packageId, hypervisorId, ipv4, storage, memory, traffic, cpuCores, networkSpeedInbound, networkSpeedOutbound, networkProfile, storageProfile.

Security Patterns

• All PHP files start with if (!defined("WHMCS")) die() to prevent direct access (except entry points using init.php)
• Client endpoints validate WHMCS session AND service ownership before any operation
• API tokens stored encrypted in WHMCS server password field (decrypted via localAPI('DecryptPassword'))
• Input validation: type casting ((int)), regex filtering, filter_var() for IP addresses
• Output escaping: htmlspecialchars() in PHP, $('<span>').text() in jQuery, {escape:'htmlall'} in Smarty
• SSL verification enabled on all API calls (CURLOPT_SSL_VERIFYPEER + CURLOPT_SSL_VERIFYHOST = 2)
• Server rename validated both client-side and server-side with RFC 1123 regex

VirtFusion API Compatibility

• API reference (OpenAPI spec): https://docs.virtfusion.com/api/openapi.yaml
• Base features: VirtFusion v1.7.3+
• VNC console: v6.1.0+
• Resource modification: v6.2.0+
• Self-service billing: Requires self-service feature enabled in VirtFusion
• OS icon path: {baseUrl}/img/logo/{icon_filename} (public, no auth required)

Product Config Options

Option	Name	Description	Default
configoption1	Hypervisor Group ID	VirtFusion hypervisor group for server placement	1
configoption2	Package ID	VirtFusion package defining server resources	1
configoption3	Default IPv4	Number of IPv4 addresses to assign (0-10)	1
configoption4	Self-Service Mode	0=Disabled, 1=Hourly, 2=Resource Packs, 3=Both	0
configoption5	Auto Top-Off Threshold	Credit balance below which auto top-off triggers	0
configoption6	Auto Top-Off Amount	Credit amount to add on auto top-off	100

WHMCS Compatibility

• WHMCS 8.x+ (tested 8.0–8.10)
• PHP 8.0+ with cURL extension
• Redis extension optional (improves caching performance, falls back to filesystem)
• All WHMCS themes supported (Six, Twenty-One, Lagom, custom) via Bootstrap 3/4/5 dual classes