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Editing: ViewLoggerEndpoint.php

<?php
namespace WordPressPopularPosts\Rest;

use WordPressPopularPosts\Helper;

class ViewLoggerEndpoint extends Endpoint {

/**
     * Registers the endpoint(s).
     *
     * @since   5.3.0
     */
    public function register()
    {
        $version = '2';
        $namespace = 'wordpress-popular-posts/v' . $version;

/** @TODO: This endpoint has been superseeded by /views, please remove */
        register_rest_route('wordpress-popular-posts/v1', '/popular-posts', [
            [
                'methods'             => \WP_REST_Server::CREATABLE,
                'callback'            => [$this, 'update_views_count'],
                'permission_callback' => '__return_true',
                'args'                => $this->get_tracking_params(),
            ]
        ]);

register_rest_route($namespace, '/views/(?P<id>[\d]+)', [
            [
                'methods'             => \WP_REST_Server::READABLE,
                'callback'            => [$this, 'get_views_count'],
                'permission_callback' => '__return_true',
                'args'                => $this->get_views_params(),
            ]
        ]);

register_rest_route($namespace, '/views/(?P<id>[\d]+)', [
            [
                'methods'             => \WP_REST_Server::CREATABLE,
                'callback'            => [$this, 'update_views_count'],
                'permission_callback' => '__return_true',
                'args'                => $this->get_tracking_params(),
            ]
        ]);
    }

/**
     * Returs the views count of a post/page.
     *
     * @since   7.0.0
     *
     * @param   \WP_REST_Request    $request  Full details about the request.
     * @return  string                        Views count string.
     */
    public function get_views_count($request) {
        $post_id = $request->get_param('id');
        $range = in_array( $request->get_param('range'), ['last24hours', 'last7days', 'last30days', 'all', 'custom'] ) ? $request->get_param('range') : 'all';
        $time_unit = in_array( $request->get_param('time_unit'), ['minute', 'hour', 'day', 'week', 'month'] ) ? $request->get_param('time_unit') : 'hour';
        $time_quantity = $request->get_param('time_quantity');
        $include_views_text = 1 == $request->get_param('include_views_text') ? 1 : 0;

$views_count_shortcode = '[wpp_views_count post_id=' . $post_id . ' include_views_text=' . $include_views_text . ' range="' . $range . '"';

if ( 'custom' == $range ) {
            $views_count_shortcode .= ' time_unit="' . $time_unit . '" time_quantity=' . $time_quantity;
        }

$views_count_shortcode .= ']';

$response['text'] = do_shortcode($views_count_shortcode);

return new \WP_REST_Response( $response, 200 );
    }

/**
     * Updates the views count of a post / page.
     *
     * @since   4.1.0
     *
     * @param   \WP_REST_Request    $request Full details about the request.
     * @return  string
     */
    public function update_views_count($request) {
        global $wpdb;

/** @TODO: Remove this check once the /v1/popular-posts is removed */
        if ( false !== strpos($request->get_route(), '/v1/popular-posts') ) {
            $post_ID = $request->get_param('wpp_id');
            // Throw warning to let developers know that
            // the /v1/popular-posts endpoint is going away
            trigger_error('The /wordpress-popular-posts/v1/popular-posts POST endpoint has been deprecated, please POST to /wordpress-popular-posts/v2/views/[ID] instead.', E_USER_WARNING);
        }
        else {
            $post_ID = $request->get_param('id');
        }

$sampling = $request->get_param('sampling');
        $sampling_rate = $request->get_param('sampling_rate');

// Sampling settings from database
        $_sampling = $this->config['tools']['sampling']['active'];
        $_sampling_rate = $this->config['tools']['sampling']['rate'];

// Let's make sure that sampling settings we got
        // on this request are what we expect
        $sampling = $sampling != $_sampling ? $_sampling : $sampling;
        $sampling_rate = $sampling_rate != $_sampling_rate ? $_sampling_rate : $sampling_rate;

$table = $wpdb->prefix . 'popularposts';
        $wpdb->show_errors();

// Get translated object ID
        $post_ID = $this->translate->get_object_id(
            $post_ID,
            get_post_type($post_ID),
            true,
            $this->translate->get_default_language()
        );

$now = Helper::now();
        $curdate = Helper::curdate();
        $views = ($sampling)
          ? $sampling_rate
          : 1;

$original_views_count = $views;
        $views = apply_filters('wpp_update_views_count_value', $views, $post_ID, $sampling, $sampling_rate);

if ( ! Helper::is_number($views) || $views <= 0 ) {
            $views = $original_views_count;
        }

// Allow WP themers / coders perform an action
        // before updating views count
        if ( has_action('wpp_pre_update_views') ) {
            do_action('wpp_pre_update_views', $post_ID, $views);
        }

$result1 = false;
        $result2 = false;

$exec_time = 0;
        $start = Helper::microtime_float();

// Store views data in persistent object cache
        if (
            wp_using_ext_object_cache()
            && defined('WPP_CACHE_VIEWS')
            && WPP_CACHE_VIEWS
        ) {

$now_datetime = new \DateTime($now, wp_timezone());
            $timestamp = $now_datetime->getTimestamp();
            $date_time = $now_datetime->format('Y-m-d H:i');
            $date_time_with_seconds = $now_datetime->format('Y-m-d H:i:s');
            $high_accuracy = false;

$key = $high_accuracy ? $timestamp : $date_time;

$wpp_cache = wp_cache_get('_wpp_cache', 'transient');

if ( ! $wpp_cache ) {
                $wpp_cache = [
                    'last_updated' => $date_time_with_seconds,
                    'data' => [
                        $post_ID => [
                            $key => 1
                        ]
                    ]
                ];
            } else {
                if ( ! isset($wpp_cache['data'][$post_ID][$key]) ) {
                    $wpp_cache['data'][$post_ID][$key] = 1;
                } else {
                    $wpp_cache['data'][$post_ID][$key] += 1;
                }
            }

// Update cache
            wp_cache_set('_wpp_cache', $wpp_cache, 'transient', 0);

// How long has it been since the last time we saved to the database?
            $last_update = $now_datetime->diff(new \DateTime($wpp_cache['last_updated'], wp_timezone()));
            $diff_in_minutes = $last_update->days * 24 * 60;
            $diff_in_minutes += $last_update->h * 60;
            $diff_in_minutes += $last_update->i;

// It's been more than 2 minutes, save everything to DB
            if ( $diff_in_minutes > 2 ) {

$query_data = "INSERT INTO {$table}data (`postid`,`day`,`last_viewed`,`pageviews`) VALUES ";
                $query_summary = "INSERT INTO {$table}summary (`postid`,`pageviews`,`view_date`,`view_datetime`) VALUES ";

foreach( $wpp_cache['data'] as $pid => $data ) {
                    $views_count = 0;

foreach( $data as $ts => $cached_views ){
                        $views_count += $cached_views;
                        $ts = Helper::is_timestamp($ts) ? $ts : strtotime($ts);

$query_summary .= $wpdb->prepare('(%d,%d,%s,%s),', [
                            $pid,
                            $cached_views,
                            date('Y-m-d', $ts),
                            date('Y-m-d H:i:s', $ts)
                        ]);
                    }

$query_data .= $wpdb->prepare( '(%d,%s,%s,%s),', [
                        $pid,
                        $date_time_with_seconds,
                        $date_time_with_seconds,
                        $views_count
                    ]);
                }

$query_data = rtrim($query_data, ',') . ' ON DUPLICATE KEY UPDATE pageviews=pageviews+VALUES(pageviews),last_viewed=VALUES(last_viewed);';
                $query_summary = rtrim($query_summary, ',') . ';';

// Clear cache
                $wpp_cache['last_updated'] = $date_time_with_seconds;
                $wpp_cache['data'] = [];
                wp_cache_set('_wpp_cache', $wpp_cache, 'transient', 0);

// Save
                //phpcs:disable WordPress.DB.PreparedSQL.InterpolatedNotPrepared,WordPress.DB.DirectDatabaseQuery.DirectQuery,WordPress.DB.PreparedSQL.NotPrepared -- We already prepared $query_data and $query_summary above
                $result1 = $wpdb->query($query_data);
                $result2 = $wpdb->query($query_summary);
                //phpcs:enable
            }
            else {
                $result1 = true;
                $result2 = true;
            }
        } // Live update to the DB
        else {
            //phpcs:disable WordPress.DB.PreparedSQL.InterpolatedNotPrepared,WordPress.DB.DirectDatabaseQuery.DirectQuery -- $table is safe to use
            // Update all-time table
            $result1 = $wpdb->query($wpdb->prepare(
                "INSERT INTO {$table}data
                (postid, day, last_viewed, pageviews) VALUES (%d, %s, %s, %d)
                ON DUPLICATE KEY UPDATE pageviews = pageviews + %d, last_viewed = %s;",
                $post_ID,
                $now,
                $now,
                $views,
                $views,
                $now
            ));

// Update range (summary) table
            $result2 = $wpdb->query($wpdb->prepare(
                "INSERT INTO {$table}summary
                (postid, pageviews, view_date, view_datetime) VALUES (%d, %d, %s, %s)
                ON DUPLICATE KEY UPDATE pageviews = pageviews + %d, view_datetime = %s;",
                $post_ID,
                $views,
                $curdate,
                $now,
                $views,
                $now
            ));
            //phpcs:enable
        }

$end = Helper::microtime_float();
        $exec_time += round($end - $start, 6);

$response = ['results' => ''];

if ( ! $result1 || ! $result2 ) {
            $response['results'] = 'WPP: failed to update views count!';
            return new \WP_REST_Response($response, 500);
        }

// Allow WP themers / coders perform an action
        // after updating views count
        if ( has_action('wpp_post_update_views') ) {
            do_action('wpp_post_update_views', $post_ID);
        }

$response['results'] = 'WPP: OK. Execution time: ' . $exec_time . ' seconds';
        return new \WP_REST_Response($response, 201);
    }

/**
     * Retrieves the query params for tracking views count.
     *
     * @since 4.1.0
     *
     * @return array Query parameters for tracking views count.
     */
    public function get_tracking_params()
    {
        /** @TODO: Remove wpp_id key once the /v1/popular-posts is removed */
        return [
            'wpp_id' => [
                'description'       => __('The post / page ID.'),
                'type'              => 'integer',
                'default'           => 0,
                'sanitize_callback' => 'absint',
                'validate_callback' => 'rest_validate_request_arg',
            ],
            'id' => [
                'type'              => 'integer',
                'minimum'           => 1,
                'sanitize_callback' => 'absint',
                'validate_callback' => 'rest_validate_request_arg',
            ],
            'sampling' => [
                'description'       => __('Enables Data Sampling.'),
                'type'              => 'integer',
                'default'           => 0,
                'sanitize_callback' => 'absint',
                'validate_callback' => 'rest_validate_request_arg',
            ],
            'sampling_rate' => [
                'description'       => __('Sets the Sampling Rate.'),
                'type'              => 'integer',
                'default'           => 100,
                'sanitize_callback' => 'absint',
                'validate_callback' => 'rest_validate_request_arg',
            ]
        ];
    }

/**
     * Retrieves the query params for getting post/page/cpt views count.
     *
     * @since 7.0.0
     *
     * @return array Query parameters for getting post/page/cpt views count.
     */
    public function get_views_params()
    {
        return [
            'id' => [
                'type'              => 'integer',
                'minimum'           => 1,
                'sanitize_callback' => 'absint',
                'validate_callback' => 'rest_validate_request_arg',
            ],
            'range' => [
                'type'              => 'string',
                'enum'              => ['last24hours', 'last7days', 'last30days', 'all', 'custom'],
                'default'           => 'all',
                'sanitize_callback' => 'sanitize_text_field',
                'validate_callback' => '__return_true'
            ],
            'time_unit' => [
                'type'              => 'string',
                'enum'              => ['minute', 'hour', 'day', 'week', 'month'],
                'default'           => 'hour',
                'sanitize_callback' => 'sanitize_text_field',
                'validate_callback' => 'rest_validate_request_arg',
            ],
            'time_quantity' => [
                'type'              => 'integer',
                'default'           => 24,
                'minimum'           => 1,
                'sanitize_callback' => 'absint',
                'validate_callback' => 'rest_validate_request_arg',
            ],
            'include_views_text' => [
                'type'              => 'integer',
                'default'           => 1,
                'sanitize_callback' => 'absint',
                'validate_callback' => function($param, $request, $key) {
                    return is_numeric($param);
                }
            ],
        ];
    }
}