<?php

/**
 * Index WP MySQL For Speed
 *
 * @author: Oliver Jones, Rick James
 * @copyright: 2022 Oliver Jones
 * @license GPL-2.0-or-later
 *
 * @wordpress-plugin0
 * Plugin Name: Index WP MySQL For Speed
 * Plugin URI:  https://plumislandmedia.org/index-wp-mysql-for-speed/
 * Description: Speed up your WordPress site by adding high-performance keys (database indexes) to your MySQL database tables.
 * Version:           1.4.15
 * Requires at least: 5.2
 * Tested up to:      6.4.2
 * Requires PHP:      5.6
 * Author:       OllieJones, rjasdfiii
 * Author URI:   https://github.com/OllieJones
 * License:      GPL v2 or later
 * License URI:  https://www.gnu.org/licenses/gpl-2.0.html
 * Github Plugin URI: https://github.com/OllieJones/index-wp-mysql-for-speed
 * Primary Branch: main
 * Text Domain:  index-wp-mysql-for-speed
 * Domain Path:  /languages
 * Network:      true
 * Tags:         database, index, key, mysql, wp-cli
 */

/** current version number  */
define( 'index_wp_mysql_for_speed_VERSION_NUM', '1.4.15' );
define( 'index_mysql_for_speed_major_version', 1.4 );
define( 'index_mysql_for_speed_inception_major_version', 1.3 );
define( 'index_mysql_for_speed_inception_wp_version', '5.8.3' );
define( 'index_mysql_for_speed_inception_wp_db_version', 49752 );
define( 'index_mysql_for_speed_log', null );

/* set up some handy globals */
define( 'index_wp_mysql_for_speed_PLUGIN_NAME', trim( dirname( plugin_basename( __FILE__ ) ), '/' ) );
define( 'index_wp_mysql_for_speed_stats_endpoint', 'https://upload.plumislandmedia.net/wp-json/plumislandmedia/v1/upload' );
define( 'index_wp_mysql_for_speed_monitor', 'imfsQueryMonitor' );
define( 'index_wp_mysql_for_speed_querytag', '*imfs-query-tag*' );
/* version 32814 was the advent of utfmb4 */
define( 'index_wp_mysql_for_speed_first_compatible_db_version', 32814 );
define( 'index_wp_mysql_for_speed_last_compatible_db_version', 0 ); /*tested up to 56657 */

define( 'index_wp_mysql_for_speed_help_site', 'https://plumislandmedia.net/index-wp-mysql-for-speed/' );

register_activation_hook( __FILE__, 'index_wp_mysql_for_speed_activate' );
register_deactivation_hook( __FILE__, 'index_wp_mysql_for_speed_deactivate' );

add_action( 'init', 'index_wp_mysql_for_speed_do_everything' );

function index_wp_mysql_for_speed_do_everything( ) {

//  define( 'INDEX_WP_MYSQL_FOR_SPEED_TEST', true ); /*tested up to 53932 */
  if ( defined ('INDEX_WP_MYSQL_FOR_SPEED_TEST') && INDEX_WP_MYSQL_FOR_SPEED_TEST) {
    require_once( plugin_dir_path( __FILE__ ) . 'tests/test-update-filter.php' );
  }
  /* admin page activation */
  $admin = is_admin();
  if ( $admin ) {
    $userCanLoad = is_multisite() ? is_super_admin() : current_user_can( 'activate_plugins' );
    if ( $userCanLoad ) {
      /* recent install or upgrade ? */
      if ( index_wp_mysql_for_speed_plugin_updated() ) {
        index_wp_mysql_for_speed_activate_mu_plugin();
      }
      $nag = index_wp_mysql_for_speed_nag();
      index_wp_mysql_for_speed_require( $nag );
      add_filter( 'plugin_action_links_' . plugin_basename( __FILE__ ), 'index_wp_mysql_for_speed_action_link' );
    }
  }
  /* wp-cli interface activation */
  if ( defined( 'WP_CLI' ) && WP_CLI ) {
    require_once( plugin_dir_path( __FILE__ ) . 'code/cli.php' );
    index_wp_mysql_for_speed_require();
  }
}

/**
 * Figure out whether user hasn't yet added or updated indexes.
 * Doing anything on the highperf index page clears this.
 * We check for plugin major version updates and wp database version updates.
 * @return string|false
 */
function index_wp_mysql_for_speed_nag() {
  global $wp_version, $wp_db_version;
  $result = false;
  if ( ! wp_doing_ajax() ) {
    $imfsPage       = get_option( 'ImfsPage' );
    $majorVersion   = ( $imfsPage !== false && isset( $imfsPage['majorVersion'] ) && is_numeric( $imfsPage['majorVersion'] ) )
      ? floatval( $imfsPage['majorVersion'] ) : index_mysql_for_speed_inception_major_version;
    $savedWpVersion = ( $imfsPage !== false && isset( $imfsPage['wp_version'] ) ) ? $imfsPage['wp_version'] : index_mysql_for_speed_inception_wp_version;
    $savedDbVersion = ( $imfsPage !== false && isset( $imfsPage['wp_db_version'] ) ) ? $imfsPage['wp_db_version'] : index_mysql_for_speed_inception_wp_db_version;
    if ( ! $imfsPage ) {
      $result = 'add';
    } else if ( $wp_db_version != $savedDbVersion ) {
      $result = 'version_update';
    } else if ( $majorVersion !== index_mysql_for_speed_major_version ) {
      $result = 'update';
    }
  }

  return $result;
}

/**
 * Is the plugin or the installation recently updated?
 * @return bool
 */
function index_wp_mysql_for_speed_plugin_updated() {
  global $wp_version, $wp_db_version;
  if ( ! wp_doing_ajax() ) {
    $imfsPage = get_option( 'ImfsPage' );

    $savedPluginVersion = ( $imfsPage !== false && isset( $imfsPage['plugin_version'] ) ) ? $imfsPage['plugin_version'] : '';
    $savedWpVersion     = ( $imfsPage !== false && isset( $imfsPage['wp_version'] ) ) ? $imfsPage['wp_version'] : '';
    $savedDbVersion     = ( $imfsPage !== false && isset( $imfsPage['wp_db_version'] ) ) ? $imfsPage['wp_db_version'] : '';

    return ( index_wp_mysql_for_speed_VERSION_NUM !== $savedPluginVersion )
           || ( $wp_version !== $savedWpVersion )
           || ( $wp_db_version !== $savedDbVersion );
  }
  return false;
}

add_action( 'init', 'index_wp_mysql_for_speed_monitor', 0 );

function index_wp_mysql_for_speed_monitor() {
  /* monitoring code ... as light as possible when not monitoring. */
  $monval = get_option( index_wp_mysql_for_speed_monitor );
  if ( $monval ) {
    if ( $monval->stoptime > time() ) {
      $admin = is_admin();
      if ( ( ( $monval->targets & 1 ) !== 0 && $admin ) || ( ( $monval->targets & 2 ) !== 0 && ! $admin ) ) {
        if ( $monval->samplerate === 1.0 || rand() <= $monval->samplerate * getrandmax() ) {
          require_once( plugin_dir_path( __FILE__ ) . 'code/querymon.php' );
          new ImfsMonitor( $monval, 'capture' );
        }
      }
    } else {
      require_once( plugin_dir_path( __FILE__ ) . 'code/querymon.php' );
      $m = new ImfsMonitor( $monval, 'nocapture' );
      $m->completeMonitoring();
      update_option( index_wp_mysql_for_speed_monitor, null, true );
    }
  }
  //}
  /* wp-cli interface activation */
  if ( defined( 'WP_CLI' ) && WP_CLI ) {
    require_once( plugin_dir_path( __FILE__ ) . 'code/cli.php' );
    index_wp_mysql_for_speed_require();
  }
}

function index_wp_mysql_for_speed_require( $nag = false ) {
  require_once( plugin_dir_path( __FILE__ ) . 'code/imsfdb.php' );
  require_once( plugin_dir_path( __FILE__ ) . 'afp/admin-page-framework.php' );
  require_once( plugin_dir_path( __FILE__ ) . 'code/admin.php' );
  require_once( plugin_dir_path( __FILE__ ) . 'code/upload.php' );
  require_once( plugin_dir_path( __FILE__ ) . 'code/querymoncontrol.php' );
  require_once( plugin_dir_path( __FILE__ ) . 'code/notice.php' );
  new ImfsNotice ( $nag );
}

function index_wp_mysql_for_speed_activate() {
  if ( version_compare( get_bloginfo( 'version' ), '5.2', '<' ) ) {
    deactivate_plugins( basename( __FILE__ ) ); /* fail activation */
    return;
  }
  update_option( index_wp_mysql_for_speed_monitor, null, true );
  index_wp_mysql_for_speed_activate_mu_plugin();
}

/** Install the mu plugin to filter DDL.
 * @return void
 */
function index_wp_mysql_for_speed_activate_mu_plugin() {
  try {
    /* install mu-plugin for handling version upgrades to tables */
    $filterName = 'index-wp-mysql-for-speed-update-filter.php';

    $src  = trailingslashit( plugin_dir_path( __FILE__ ) ) . 'code/assets/mu/' . $filterName;
    $dest = trailingslashit( WPMU_PLUGIN_DIR ) . $filterName;

    if ( ! file_exists( $dest ) ) {
      /* Make sure the `mu-plugins` directory exists. It might not in a standard install */
      if ( ! is_dir( WPMU_PLUGIN_DIR ) ) {
        wp_mkdir_p( WPMU_PLUGIN_DIR );
      }

      /* Copy the little must-use plugin to the mu-plugins directory. */
      $result = copy( $src, $dest );
      if ( ! $result ) {
        /* translators: this goes into error_log() */
        error_log( __( 'index-wp-mysql-for-speed: Unable to set up the mu-plugin to filter data definition language when preparing for a WordPress upgrade.', 'index-wp-mysql-for-speed' ) );
      }
    }
  } catch ( Exception $exception ) {
    /* translators: this goes into error_log() */
    error_log( $exception->getMessage() . ': ' . __( 'index-wp-mysql-for-speed: Exception setting up the mu-plugin to filter data definition language when preparing for a WordPress upgrade.', 'index-wp-mysql-for-speed' ) );
  }
}

function index_wp_mysql_for_speed_deactivate() {
  /* clean up emphemeral options */
  delete_option( 'imfsQueryMonitor' );
  delete_option( 'imfsQueryMonitornextMonitorUpdate' );
  delete_option( 'imfsQueryMonitorGather' );
  delete_option( index_wp_mysql_for_speed_monitor );
  /* Delete the mu-plugin for handling upgrades. */
  $filterName = 'index-wp-mysql-for-speed-update-filter.php';
  $dest       = trailingslashit( WPMU_PLUGIN_DIR ) . $filterName;
  if ( file_exists( $dest ) ) {
    if ( ! @unlink( $dest ) ) {
      /* translators: this goes into error_log() */
      error_log( __( 'index-wp-mysql-for-speed: Unable to remove the mu-plugin to filter data definition language.', 'index-wp-mysql-for-speed' ) );
    }
  }
}

/**
 * Add Settings link to this plugin's listing on the Plugins page.
 *
 * @param $actions
 *
 * @return array
 */
function index_wp_mysql_for_speed_action_link( $actions ) {
  /* translators: for settings link on plugin page */
  $name    = __( "Settings", 'index-wp-mysql-for-speed' );
  $mylinks = [
    '<a href="' . admin_url( 'tools.php?page=imfs_settings' ) . '">' . $name . '</a>',
  ];

  return array_merge( $mylinks, $actions );
}

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