# Changelog

All notable changes to this project will be documented in this file.

The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).

## [0.2.0] - 2026-02-02

### Added

- WooCommerce integration metrics (when WooCommerce is active):
  - `wordpress_woocommerce_products_total` - Products by status and type
  - `wordpress_woocommerce_orders_total` - Orders by status
  - `wordpress_woocommerce_revenue_total` - Revenue (all time, today, month)
  - `wordpress_woocommerce_customers_total` - Customers (registered, guest)
- Cron job metrics:
  - `wordpress_cron_events_total` - Scheduled cron events by hook
  - `wordpress_cron_overdue_total` - Number of overdue cron events
  - `wordpress_cron_next_run_timestamp` - Unix timestamp of next scheduled cron
- Transient cache metrics:
  - `wordpress_transients_total` - Transients by type (total, with_expiration, persistent, expired)
- WooCommerce metrics section in settings (only visible when WooCommerce is active)
- Support for WooCommerce HPOS (High-Performance Order Storage)

### Changed

- Updated Help tab with new metrics reference

## [0.1.1] - 2026-02-02

### Changed

- Reorganized settings page with tabbed interface (License, Metrics, Help tabs)
- Moved Prometheus configuration help to dedicated Help tab
- Separated static and runtime metrics in settings with descriptions
- Added admin CSS for improved tab styling

### Added

- New Help tab with endpoint information, curl examples, and metrics reference table
- Custom code examples section in Help tab

## [0.1.0] - 2026-02-02

### Added

- HTTP request metrics:
  - `wordpress_http_requests_total` - Counter of HTTP requests by method, status code, and endpoint
  - `wordpress_http_request_duration_seconds` - Histogram of request durations
- Database query metrics:
  - `wordpress_db_queries_total` - Counter of database queries by endpoint
  - `wordpress_db_query_duration_seconds` - Histogram of query durations (requires SAVEQUERIES)
- RuntimeCollector class for collecting metrics during WordPress request lifecycle
- New settings options for enabling/disabling runtime metrics
- Translation files (.pot, .po, .mo) for German (Switzerland)

### Changed

- Metrics are now categorized into static metrics (users, posts, etc.) and runtime metrics (HTTP, database)
- Runtime metrics only collected when explicitly enabled and license is valid

## [0.0.2] - 2026-02-01

### Fixed

- Fixed composer.json dependency version constraint for wc-licensed-product-client (^0.2.2 instead of dev-main)
- Changed minimum-stability back to stable

## [0.0.1] - 2026-02-01

### Added

- Initial plugin structure and bootstrap
- Main plugin class with singleton pattern
- License management integration with wc-licensed-product-client
- Prometheus metrics collector with default WordPress metrics:
  - `wordpress_info` - WordPress installation information
  - `wordpress_users_total` - Total users by role
  - `wordpress_posts_total` - Total posts by type and status
  - `wordpress_comments_total` - Total comments by status
  - `wordpress_plugins_total` - Total plugins by status
- Authenticated `/metrics` endpoint with Bearer token
- Admin settings page under Settings > Metrics
- Extensibility via `wp_prometheus_collect_metrics` action hook
- Gitea CI/CD pipeline for automated releases
- Comprehensive documentation (README.md, PLAN.md, CLAUDE.md)

### Security

- Bearer token authentication for metrics endpoint
- Nonce verification for all AJAX requests
- Capability checks for admin operations
- Input sanitization and output escaping