<?php
/**
 * BP_Export base class
 *
 * @package BuddyBoss\GDPR
 * @since BuddyBoss 1.0.0
 */

// Exit if accessed directly.
defined( 'ABSPATH' ) || exit;

/**
 * Class BP_Export
 *
 * @since BuddyBoss 1.0.0
 */
abstract class BP_Export {

	protected $exporter_name   = '';
	protected $exporter_label  = '';
	protected $items_per_batch = 50;

	/**
	 * @param $name
	 * @param $label
	 *
	 * @since BuddyBoss 1.0.0
	 */
	function setup( $name, $label ) {

		$this->exporter_name  = $name;
		$this->exporter_label = $label;

		// Global Filter.
		$this->items_per_batch = apply_filters( 'buddyboss_bp_gdpr_item_per_batch', $this->items_per_batch );
		// Specific Filter.
		$this->items_per_batch = apply_filters( 'buddyboss_bp_gdpr_item_per_batch_{$name}', $this->items_per_batch );

		$this->hooks();

	}

	/**
	 * Register erase and export hooks.
	 *
	 * @since BuddyBoss 1.0.0
	 */
	function hooks() {
		add_filter( 'wp_privacy_personal_data_exporters', array( $this, 'register_exporter' ), 10 );
		add_filter( 'wp_privacy_personal_data_erasers', array( $this, 'register_eraser' ), 10 );
	}

	/**
	 * Register exporter callback.
	 *
	 * @param $exporters
	 *
	 * @since BuddyBoss 1.0.0
	 *
	 * @return mixed
	 */
	function register_exporter( $exporters ) {

		$exporters[ $this->exporter_name ] = array(
			'exporter_friendly_name' => $this->exporter_label,
			'callback'               => array( $this, 'process_export_callback' ),
		);

		return $exporters;
	}

	/**
	 * Register delete callback.
	 *
	 * @param $erasers
	 *
	 * @since BuddyBoss 1.0.0
	 *
	 * @return mixed
	 */
	function register_eraser( $erasers ) {

		$erasers[ $this->exporter_name ] = array(
			'eraser_friendly_name' => $this->exporter_label,
			'callback'             => array( $this, 'process_eraser_callback' ),
		);

		return $erasers;
	}

	/**
	 * Process export callback.
	 *
	 * @param     $email_address
	 * @param int           $page
	 *
	 * @since BuddyBoss 1.0.0
	 *
	 * @return array
	 */
	function process_export_callback( $email_address, $page = 1 ) {

		$user = get_user_by( 'email', $email_address );

		/**
		 * @todo add title/description
		 *
		 * @since BuddyBoss 1.0.0
		 */
		do_action( 'buddyboss_bp_gdpr_pre_exporter_callback', $email_address, $page, $user );

		return $this->process_data( $user, $page, $email_address );
	}

	/**
	 * Process delete callback
	 *
	 * @param     $email_address
	 * @param int           $page
	 *
	 * @since BuddyBoss 1.0.0
	 *
	 * @return mixed
	 */
	function process_eraser_callback( $email_address, $page = 1 ) {

		$user = get_user_by( 'email', $email_address );

		/**
		 * @todo add title/description
		 *
		 * @since BuddyBoss 1.0.0
		 */
		do_action( 'buddyboss_bp_gdpr_pre_eraser_callback', $email_address, $page, $user );

		return $this->process_erase( $user, $page, $email_address );

	}

	/**
	 * Fallback.
	 *
	 * @param      $user
	 * @param      $page
	 * @param bool $email_address
	 *
	 * @since BuddyBoss 1.0.0
	 * @ignore
	 * @return array
	 */
	function process_data( $user, $page, $email_address ) {
		return $this->response( array(), true );
	}

	/**
	 * Fallback.
	 *
	 * @param      $user
	 * @param      $page
	 * @param bool $email_address
	 *
	 * @since BuddyBoss 1.0.0
	 * @ignore
	 * @return array
	 */
	function process_erase( $user, $page, $email_address ) {
		return $this->response_erase( false, true );
	}

	/**
	 * Export data response.
	 *
	 * @param array $export_data
	 * @param bool  $done
	 *
	 * @since BuddyBoss 1.0.0
	 *
	 * @return array
	 */
	function response( $export_data = array(), $done = false ) {
		return array(
			'data' => $export_data,
			'done' => $done,
		);
	}

	/**
	 * Delete data response.
	 *
	 * @param bool  $item_removed
	 * @param bool  $done
	 * @param array $messages
	 * @param bool  $items_retained
	 *
	 * @since BuddyBoss 1.0.0
	 *
	 * @return array
	 */
	function response_erase( $item_removed = true, $done = false, $messages = array(), $items_retained = false ) {
		return array(
			'items_removed'  => $item_removed,
			'items_retained' => $items_retained,
			'messages'       => $messages,
			'done'           => $done,
		);
	}

	/**
	 * Convert serialized meta to readable data.
	 *
	 * @param $value
	 *
	 * @since BuddyBoss 1.0.0
	 *
	 * @return string
	 */
	function easy_readable( $value ) {

		if ( ! is_serialized( $value ) && ! is_array( $value ) && ! is_object( $value ) ) {
			return $value;
		}

		$value = maybe_serialize( $value );

		return wp_json_encode( $value, JSON_PRETTY_PRINT );

	}

}