wp-prometheus/src/Installer.php

<?php
/**
 * Plugin installer class.
 *
 * @package WP_Prometheus
 */

namespace Magdev\WpPrometheus;

// Prevent direct file access.
if ( ! defined( 'ABSPATH' ) ) {
    exit;
}

/**
 * Installer class.
 *
 * Handles plugin activation, deactivation, and uninstallation.
 */
final class Installer {

    /**
     * Plugin activation.
     *
     * @return void
     */
    public static function activate(): void {
        // Set default options.
        self::set_default_options();

        // Flush rewrite rules for the metrics endpoint.
        flush_rewrite_rules();

        // Store activation time for reference.
        update_option( 'wp_prometheus_activated', time() );
    }

    /**
     * Plugin deactivation.
     *
     * @return void
     */
    public static function deactivate(): void {
        // Flush rewrite rules.
        flush_rewrite_rules();
    }

    /**
     * Plugin uninstallation.
     *
     * @return void
     */
    public static function uninstall(): void {
        // Remove all plugin options.
        $options = array(
            'wp_prometheus_activated',
            'wp_prometheus_license_key',
            'wp_prometheus_license_server_url',
            'wp_prometheus_license_server_secret',
            'wp_prometheus_license_status',
            'wp_prometheus_license_data',
            'wp_prometheus_license_last_check',
            'wp_prometheus_auth_token',
            'wp_prometheus_enable_default_metrics',
            'wp_prometheus_enabled_metrics',
            'wp_prometheus_runtime_metrics',
        );

        foreach ( $options as $option ) {
            delete_option( $option );
        }

        // Remove transients.
        delete_transient( 'wp_prometheus_license_check' );
    }

    /**
     * Set default plugin options.
     *
     * @return void
     */
    private static function set_default_options(): void {
        // Generate a random auth token if not set.
        if ( ! get_option( 'wp_prometheus_auth_token' ) ) {
            update_option( 'wp_prometheus_auth_token', wp_generate_password( 32, false ) );
        }

        // Enable default metrics by default.
        if ( false === get_option( 'wp_prometheus_enable_default_metrics' ) ) {
            update_option( 'wp_prometheus_enable_default_metrics', 1 );
        }

        // Default enabled metrics.
        if ( false === get_option( 'wp_prometheus_enabled_metrics' ) ) {
            update_option( 'wp_prometheus_enabled_metrics', array(
                'wordpress_info',
                'wordpress_users_total',
                'wordpress_posts_total',
                'wordpress_comments_total',
                'wordpress_plugins_total',
            ) );
        }
    }
}