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Edit File: abstract-uwp-privacy.php

<?php
/**
 * Abstract privacy class.
 */

defined( 'ABSPATH' ) || exit;

/**
 * Abstract class that is intended to be extended by
 * specific privacy class. It handles the display
 * of the privacy message of the privacy id to the admin,
 * privacy data to be exported and privacy data to be deleted.
 */
abstract class UsersWP_Abstract_Privacy {
    /**
     * This is the name of this object type.
     *
     * @var string
     */
    public $name;

/**
     * This is a list of exporters.
     *
     * @var array
     */
    protected $exporters = array();

/**
     * This is a list of erasers.
     *
     * @var array
     */
    protected $erasers = array();

/**
     * Constructor
     *
     * @param string $name Plugin identifier.
     */
    public function __construct( $name = '' ) {
        $this->name = $name;
        $this->init();
    }

/**
     * Hook in events.
     */
    protected function init() {
        add_action( 'admin_init', array( $this, 'add_privacy_message' ) );
        // Register data exporters
        add_filter( 'wp_privacy_personal_data_exporters', array( $this, 'register_exporters' ), 10 );
        // Register data erasers
        add_filter( 'wp_privacy_personal_data_erasers', array( $this, 'register_erasers' ) );
    }

/**
     * Adds the privacy message on userswp privacy page.
     */
    public function add_privacy_message() {
        if ( function_exists( 'wp_add_privacy_policy_content' ) ) {
            $content = $this->get_privacy_message();

if ( $content ) {
                wp_add_privacy_policy_content( $this->name, $this->get_privacy_message() );
            }
        }
    }

/**
     * Gets the message of the privacy to display.
     * To be overloaded by the implementor.
     *
     * @return string
     */
    public function get_privacy_message() {
        return '';
    }

/**
     * Integrate this exporter implementation within the WordPress core exporters.
     *
     * @param array $exporters List of exporter callbacks.
     * @return array
     */
    public function register_exporters( $exporters = array() ) {
        foreach ( $this->exporters as $id => $exporter ) {
            $exporters[ $id ] = $exporter;
        }
        return $exporters;
    }

/**
     * Integrate this eraser implementation within the WordPress core erasers.
     *
     * @param array $erasers List of eraser callbacks.
     * @return array
     */
    public function register_erasers( $erasers = array() ) {
        foreach ( $this->erasers as $id => $eraser ) {
            $erasers[ $id ] = $eraser;
        }
        return $erasers;
    }

/**
     * Add exporter to list of exporters.
     *
     * @param string $id       ID of the Exporter.
     * @param string $name     Exporter name.
     * @param string $callback Exporter callback.
     *
     * @return array
     */
    public function add_exporter( $id, $name, $callback ) {
        $this->exporters[ $id ] = array(
            'exporter_friendly_name' => $name,
            'callback'               => $callback,
        );
        return $this->exporters;
    }

/**
     * Add eraser to list of erasers.
     *
     * @param string $id       ID of the Eraser.
     * @param string $name     Exporter name.
     * @param string $callback Exporter callback.
     *
     * @return array
     */
    public function add_eraser( $id, $name, $callback ) {
        $this->erasers[ $id ] = array(
            'eraser_friendly_name' => $name,
            'callback'             => $callback,
        );
        return $this->erasers;
    }
}

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