Elep

<?php
defined( 'ABSPATH' ) or die();

if ( ! class_exists( 'burst_summary' ) ) {
	class burst_summary {
		function __construct() {
			add_action( 'burst_every_hour', array( $this, 'update_summary_table_today' ) );
			add_filter( 'burst_do_action', array( $this, 'refresh_data' ), 10, 3 );
			if ( defined( 'BURST_RESTART_SUMMARY_UPGRADE' ) && BURST_RESTART_SUMMARY_UPGRADE ) {
				$this->restart_update_summary_table_alltime();
			}
		}

/**
		 * @param array           $data
		 * @param string          $action
		 * @param WP_REST_Request $request
		 *
		 * @return array
		 */
		public function refresh_data( array $output, string $action, $data ): array {
			if ( ! burst_user_can_manage() ) {
				return $output;
			}

if ( $action === 'refresh_data' ) {
				$this->update_summary_table();
				$output['success'] = true;
			}

return $output;
		}

/**
		 * Check if all items are summary data
		 *
		 * @param array $items
		 *
		 * @return bool
		 */
		public function is_summary_data( array $items, array $filters, int $end ): bool {
			if ( ! empty( $filters ) ) {
				return false;
			}

// if end is today, we can't be sure that the data is complete, so we don't use summary data.
			$today_end = BURST()->statistics->convert_date_to_unix( date( 'Y-m-d' ) . ' 23:59:59' );
			if ( $end === $today_end ) {
				return false;
			}

$summary_items = [
				'page_url',
				'sessions',
				'pageviews',
				'bounce_rate',
				'visitors',
				'first_time_visitors',
				'bounces',
				'avg_time_on_page',
			];
			foreach ( $items as $item ) {
				if ( ! in_array( $item, $summary_items, true ) ) {
					return false;
				}
			}
			return true;
		}

/**
		 * Restart the summary table update
		 *
		 * @return void
		 */
		public function restart_update_summary_table_alltime() {
			global $wpdb;

$table_names = array( $wpdb->prefix . 'burst_summary' );

foreach ( $table_names as $table_name ) {
				if ( $wpdb->get_var( "SHOW TABLES LIKE '$table_name'" ) === $table_name ) {
					$wpdb->query( "TRUNCATE TABLE $table_name" );
				}
			}

update_option( 'burst_db_upgrade_summary_table', true, false );
			delete_option( 'burst_summary_table_upgrade_days_offset' );
		}

/**
		 * Check if the summary upgrade has been completed
		 *
		 * @return bool
		 */
		public function upgrade_completed() {
			// if option set to never use summary tables, return false for upgrade completed.
			if ( defined( 'BURST_DONT_USE_SUMMARY_TABLE' ) ) {
				return false;
			}
			return ! get_option( 'burst_db_upgrade_summary_table' );
		}

/**
		 * Upgrade the data to summary table, progressing over all days until the last one is completed
		 *
		 * @return void
		 */
		public function upgrade_summary_table_alltime() {
			global $wpdb;
			$first_statistics_date_unix = $wpdb->get_var( "select min(time) from {$wpdb->prefix}burst_statistics" ); // 1644260876
			// convert unix to date and back to unix, to ensure that the date is at the start of the day, for comparison purposes
			$first_statistics_date = BURST()->statistics->convert_unix_to_date( $first_statistics_date_unix ); // 2022-02-07
			// calculate days offset from first_statistics_date to today
			$first_statistics_date_unix = strtotime( $first_statistics_date );
			$today                      = BURST()->statistics->convert_unix_to_date( strtotime( 'today' ) );
			$max_days_offset            = ( strtotime( $today ) - $first_statistics_date_unix ) / DAY_IN_SECONDS;
			// round to integer
			$max_days_offset = round( $max_days_offset, 0 );
			// if the offset is negative, set it to 0
			$max_days_offset     = $max_days_offset < 0 ? 0 : $max_days_offset;
			$current_days_offset = (int) get_option( 'burst_summary_table_upgrade_days_offset', 0 );
			// check if the oldest summary date is more recent than the oldest statistics date
			// we ensure that it will always run for today, by running if offset = 0.
			if ( $max_days_offset >= $current_days_offset ) {
				for ( $i = 0; $i < 30; $i++ ) {
					$success = $this->update_summary_table( $current_days_offset );
					// if failed, exit, and try again later
					if ( ! $success ) {
						return;
					}
					// if successful, increment days offset
					++$current_days_offset;
				}

update_option( 'burst_summary_table_upgrade_days_offset', $current_days_offset, false );
			} else {
				// completed
				delete_option( 'burst_db_upgrade_summary_table' );
			}
		}

/**
		 * Run scheduled to update today's summary data
		 *
		 * @return void
		 */
		public function update_summary_table_today() {
			// we want to update for yesterday at least once on the next day, to ensure completeness. If completed, continue with normal update process
			if ( ! $this->summary_table_updated_yesterday() ) {
				$this->update_summary_table( 1 );
			}

// update for today
			$this->update_summary_table();
		}

/**
		 * Check if yesterday's summary was marked as completed
		 *
		 * @return bool
		 */
		private function summary_table_updated_yesterday(): bool {
			global $wpdb;
			$yesterday = BURST()->statistics->convert_unix_to_date( strtotime( 'yesterday' ) );
			$completed = $wpdb->get_var( $wpdb->prepare( "select completed from {$wpdb->prefix}burst_summary where date = %s", $yesterday ) );
			return (bool) $completed;
		}

public function summary_sql( $date_start, $date_end, $select_array, $group_by = '', $order_by = '', $limit = '', $date_modifiers = false ) {
			$date_start = BURST()->statistics->convert_unix_to_date( $date_start );
			$date_end   = BURST()->statistics->convert_unix_to_date( $date_end );

global $wpdb;

$sql_array = [
				'bounce_rate'         => 'sum(bounces) / count(sessions) * 100 as bounce_rate',
				'pageviews'           => 'sum(pageviews) as pageviews',
				'visitors'            => 'sum(visitors) as visitors',
				'sessions'            => 'sum(sessions) as sessions',
				'first_time_visitors' => 'sum(first_time_visitors) as first_time_visitors',
				'bounces'             => 'sum(bounces) as bounces',
				'avg_time_on_page'    => 'AVG(avg_time_on_page) as avg_time_on_page',
			];
			$select    = [];
			foreach ( $select_array as $select_item ) {
				if ( isset( $sql_array[ $select_item ] ) ) {
					$select[] = $sql_array[ $select_item ];
				}
			}

$select[]   = $date_modifiers ? "DATE_FORMAT(date, '{$date_modifiers['sql_date_format']}') as period" : 'page_url';
			$sql        = implode( ', ', $select );
			$date_start = esc_sql( $date_start );
			$date_end   = esc_sql( $date_end );
			$sql        = "select $sql from {$wpdb->prefix}burst_summary where date>='$date_start' AND date<='$date_end'";

// page_urls include unique visitors, which overlap with the same unique visitors from other page_urls.
			// we can't just sum up all unique visitors from all page_urls, so if the page_url is not a selector, we get the day total.
			if ( ! in_array( 'page_url', $select_array, true ) ) {
				$sql .= " AND page_url='burst_day_total'";
			} else {
				$sql .= " AND page_url!='burst_day_total'";
			}

if ( ! empty( $group_by ) ) {
				$sql .= ' group by ' . $group_by;
			}

if ( ! empty( $order_by ) ) {
				$sql .= ' order by ' . $order_by;
			}

if ( ! empty( $limit ) ) {
				$sql .= ' ' . $limit;
			}
			return $sql;
		}

/**
		 * Update the summary table for one day.
		 *
		 * @param int $days_offset
		 */
		public function update_summary_table( int $days_offset = 0 ): bool {
			if ( get_transient( 'burst_updating_summary_table' ) ) {
				return false;
			}
			set_transient( 'burst_updating_summary_table', 5 * MINUTE_IN_SECONDS );
			global $wpdb;
			$today = BURST()->statistics->convert_unix_to_date( strtotime( 'today' ) );
			// deduct days offset in days
			if ( $days_offset > 0 ) {
				$today = BURST()->statistics->convert_unix_to_date( strtotime( $today . ' -' . $days_offset . ' days' ) );
			}
			// get start of today in unix
			$date_start = BURST()->statistics->convert_date_to_unix( $today . ' 00:00:00' );
			// get end of today in unix
			$date_end = BURST()->statistics->convert_date_to_unix( $today . ' 23:59:59' );
			// get today's date
			// get the summary from the statistics table
			$select_sql = BURST()->statistics->get_sql_table_raw(
				$date_start,
				$date_end,
				array(
					'pageviews',
					'visitors',
					'first_time_visitors',
					'page_url',
					'bounces',
					'sessions',
					'avg_time_on_page',
				),
				array(),
				'page_url'
			);
			// if this is the update for yesterday or before, mark it as completed
			$completed  = $days_offset !== 0 ? 1 : 0;
			$update_sql = $wpdb->prepare(
				"INSERT INTO {$wpdb->prefix}burst_summary (date, page_url, sessions, pageviews, visitors, first_time_visitors, bounces, avg_time_on_page, completed)
							SELECT
							    %s AS date,
							    source.page_url,
							    source.sessions,
							    source.pageviews,
							    source.visitors,
							    source.first_time_visitors,
							    source.bounces,
							    source.avg_time_on_page,
								%s AS completed
							FROM (
							    $select_sql
							) AS source
							ON DUPLICATE KEY UPDATE
							    date = date,
							    page_url = source.page_url,
							    sessions = source.sessions,
							    pageviews = source.pageviews,
							    visitors = source.visitors,
							    first_time_visitors = COALESCE(source.first_time_visitors, 0),
							    bounces = source.bounces,
							    avg_time_on_page = source.avg_time_on_page,
							    completed = completed;",
				$today,
				$completed
			);
			$wpdb->query( $update_sql );

// we also create the day total for this day.
			$select_sql = BURST()->statistics->get_sql_table_raw(
				$date_start,
				$date_end,
				array(
					'pageviews',
					'visitors',
					'first_time_visitors',
					'bounces',
					'sessions',
					'avg_time_on_page',
				)
			);
			$update_sql = $wpdb->prepare(
				"INSERT INTO {$wpdb->prefix}burst_summary (date, page_url, sessions, pageviews, visitors, first_time_visitors, bounces, avg_time_on_page, completed)
							SELECT
							    %s AS date,
							    'burst_day_total' as page_url,
							    source.sessions,
							    source.pageviews,
							    source.visitors,
							    source.first_time_visitors,
							    source.bounces,
							    source.avg_time_on_page,
								%s AS completed
							FROM (
							    $select_sql
							) AS source
							ON DUPLICATE KEY UPDATE
							    date = date,
							    page_url = page_url,
							    sessions = source.sessions,
							    pageviews = source.pageviews,
							    visitors = source.visitors,
							    first_time_visitors = COALESCE(source.first_time_visitors, 0),
							    bounces = source.bounces,
							    avg_time_on_page = COALESCE(source.avg_time_on_page, 0),
							    completed = completed;",
				$today,
				$completed
			);

$wpdb->query( $update_sql );

delete_transient( 'burst_updating_summary_table' );
			return true;
		}
	}
}