<?php
/**
 * ActivityPub Class.
 *
 * @package Activitypub
 */

namespace Activitypub;

use Activitypub\Collection\Followers;
use Activitypub\Collection\Following;
use Activitypub\Collection\Remote_Posts;
use Activitypub\OAuth\Client;

/**
 * ActivityPub Class.
 *
 * @author Matthias Pfefferle
 */
class Activitypub {
	/**
	 * Initialize the class, registering WordPress hooks.
	 */
	public static function init() {
		\add_action( 'init', array( self::class, 'theme_compat' ), 11 );
		\add_action( 'init', array( self::class, 'register_user_meta' ), 11 );

		\add_action( 'wp_trash_post', array( self::class, 'trash_post' ), 1 );
		\add_action( 'untrash_post', array( self::class, 'untrash_post' ), 1 );

		\add_action( 'user_register', array( self::class, 'user_register' ) );

		\add_action( 'activitypub_add_user_block', array( Followers::class, 'remove_blocked_actors' ), 10, 3 );
		\add_action( 'activitypub_add_user_block', array( Following::class, 'remove_blocked_actors' ), 10, 3 );
	}

	/**
	 * Activation Hook.
	 *
	 * @param bool $network_wide Whether to activate the plugin for all sites in the network or just the current site.
	 */
	public static function activate( $network_wide ) {
		self::flush_rewrite_rules();
		Scheduler::register_schedules();

		\add_filter( 'pre_wp_update_comment_count_now', array( Comment::class, 'pre_wp_update_comment_count_now' ), 5, 3 );
		Migration::update_comment_counts();

		if ( \is_multisite() && $network_wide && ! \wp_is_large_network() ) {
			$sites = \get_sites( array( 'fields' => 'ids' ) );
			foreach ( $sites as $site ) {
				\switch_to_blog( $site );
				self::flush_rewrite_rules();
				\restore_current_blog();
			}
		}
	}

	/**
	 * Deactivation Hook.
	 *
	 * @param bool $network_wide Whether to deactivate the plugin for all sites in the network or just the current site.
	 */
	public static function deactivate( $network_wide ) {
		self::flush_rewrite_rules();
		Scheduler::deregister_schedules();

		\remove_filter( 'pre_wp_update_comment_count_now', array( Comment::class, 'pre_wp_update_comment_count_now' ), 5 );
		Migration::update_comment_counts( 2000 );

		if ( \is_multisite() && $network_wide && ! \wp_is_large_network() ) {
			$sites = \get_sites( array( 'fields' => 'ids' ) );
			foreach ( $sites as $site ) {
				\switch_to_blog( $site );
				self::flush_rewrite_rules();
				\restore_current_blog();
			}
		}
	}

	/**
	 * Uninstall Hook.
	 */
	public static function uninstall() {
		Scheduler::deregister_schedules();

		\remove_filter( 'pre_wp_update_comment_count_now', array( Comment::class, 'pre_wp_update_comment_count_now' ), 5 );
		Migration::update_comment_counts( 2000 );

		Remote_Posts::delete_all();
		Tombstone::delete_all();
		Client::delete_all();

		Options::delete();
	}

	/**
	 * Store permalink in meta, to send delete Activity.
	 *
	 * @param string $post_id The Post ID.
	 */
	public static function trash_post( $post_id ) {
		\add_post_meta(
			$post_id,
			'_activitypub_canonical_url',
			\get_permalink( $post_id ),
			true
		);
	}

	/**
	 * Delete permalink from meta.
	 *
	 * @param string $post_id The Post ID.
	 */
	public static function untrash_post( $post_id ) {
		\delete_post_meta( $post_id, '_activitypub_canonical_url' );
	}

	/**
	 * Flush rewrite rules.
	 */
	public static function flush_rewrite_rules() {
		Router::add_rewrite_rules();
		\flush_rewrite_rules();
	}

	/**
	 * Add rewrite rules.
	 *
	 * @deprecated 7.5.0 Use {@see Router::add_rewrite_rules()}.
	 */
	public static function add_rewrite_rules() {
		_deprecated_function( __FUNCTION__, '7.5.0', '\Activitypub\Router::add_rewrite_rules()' );

		Router::add_rewrite_rules();
	}

	/**
	 * Theme compatibility stuff.
	 */
	public static function theme_compat() {
		// We assume that you want to use Post-Formats when enabling the setting.
		if ( 'wordpress-post-format' === \get_option( 'activitypub_object_type', ACTIVITYPUB_DEFAULT_OBJECT_TYPE ) ) {
			if ( ! get_theme_support( 'post-formats' ) ) {
				// Add support for the Aside, Gallery Post Formats...
				add_theme_support(
					'post-formats',
					array(
						'gallery',
						'status',
						'image',
						'video',
						'audio',
					)
				);
			}
		}
	}

	/**
	 * Add the 'activitypub' capability to users who can publish posts.
	 *
	 * @param int $user_id User ID.
	 */
	public static function user_register( $user_id ) {
		if ( \user_can( $user_id, 'publish_posts' ) ) {
			$user = \get_user_by( 'id', $user_id );
			$user->add_cap( 'activitypub' );
		}
	}

	/**
	 * Register user meta.
	 */
	public static function register_user_meta() {
		$blog_prefix = $GLOBALS['wpdb']->get_blog_prefix();

		\register_meta(
			'user',
			$blog_prefix . 'activitypub_also_known_as',
			array(
				'type'              => 'array',
				'description'       => 'An array of URLs that the user is known by.',
				'single'            => true,
				'default'           => array(),
				'sanitize_callback' => array( Sanitize::class, 'identifier_list' ),
			)
		);

		\register_meta(
			'user',
			$blog_prefix . 'activitypub_hide_social_graph',
			array(
				'type'              => 'integer',
				'description'       => 'Hide Followers and Followings on Profile.',
				'single'            => true,
				'default'           => 0,
				'sanitize_callback' => 'absint',
				'show_in_rest'      => true,
			)
		);

		\register_meta(
			'user',
			$blog_prefix . 'activitypub_old_host_data',
			array(
				'description' => 'Actor object for the user on the old host.',
				'single'      => true,
			)
		);

		\register_meta(
			'user',
			$blog_prefix . 'activitypub_moved_to',
			array(
				'type'              => 'string',
				'description'       => 'The new URL of the user.',
				'single'            => true,
				'sanitize_callback' => 'sanitize_url',
			)
		);

		\register_meta(
			'user',
			$blog_prefix . 'activitypub_description',
			array(
				'type'              => 'string',
				'description'       => 'The user description.',
				'single'            => true,
				'default'           => '',
				'sanitize_callback' => static function ( $value ) {
					return wp_kses( $value, 'user_description' );
				},
			)
		);

		\register_meta(
			'user',
			$blog_prefix . 'activitypub_icon',
			array(
				'type'              => 'integer',
				'description'       => 'The attachment ID for user profile image.',
				'single'            => true,
				'default'           => 0,
				'sanitize_callback' => 'absint',
			)
		);

		\register_meta(
			'user',
			$blog_prefix . 'activitypub_header_image',
			array(
				'type'              => 'integer',
				'description'       => 'The attachment ID for the user header image.',
				'single'            => true,
				'default'           => 0,
				'sanitize_callback' => 'absint',
			)
		);

		\register_meta(
			'user',
			$blog_prefix . 'activitypub_mailer_new_dm',
			array(
				'type'              => 'integer',
				'description'       => 'Send a notification when someone sends this user a direct message.',
				'single'            => true,
				'sanitize_callback' => 'absint',
			)
		);
		\add_filter( 'get_user_option_activitypub_mailer_new_dm', array( self::class, 'user_options_default' ) );

		\register_meta(
			'user',
			$blog_prefix . 'activitypub_mailer_new_follower',
			array(
				'type'              => 'integer',
				'description'       => 'Send a notification when someone starts to follow this user.',
				'single'            => true,
				'sanitize_callback' => 'absint',
			)
		);
		\add_filter( 'get_user_option_activitypub_mailer_new_follower', array( self::class, 'user_options_default' ) );

		\register_meta(
			'user',
			$blog_prefix . 'activitypub_mailer_new_mention',
			array(
				'type'              => 'integer',
				'description'       => 'Send a notification when someone mentions this user.',
				'single'            => true,
				'sanitize_callback' => 'absint',
			)
		);
		\add_filter( 'get_user_option_activitypub_mailer_new_mention', array( self::class, 'user_options_default' ) );

		\register_meta(
			'user',
			$blog_prefix . 'activitypub_mailer_annual_report',
			array(
				'type'              => 'integer',
				'description'       => 'Send the annual Fediverse Year in Review email.',
				'single'            => true,
				'sanitize_callback' => 'absint',
			)
		);
		\add_filter( 'get_user_option_activitypub_mailer_annual_report', array( self::class, 'user_options_default' ) );

		\register_meta(
			'user',
			$blog_prefix . 'activitypub_mailer_monthly_report',
			array(
				'type'              => 'integer',
				'description'       => 'Send a monthly Fediverse stats report email.',
				'single'            => true,
				'sanitize_callback' => 'absint',
			)
		);

		\register_meta(
			'user',
			'activitypub_show_welcome_tab',
			array(
				'type'              => 'integer',
				'description'       => 'Whether to show the welcome tab.',
				'single'            => true,
				'default'           => 1,
				'sanitize_callback' => 'absint',
			)
		);

		\register_meta(
			'user',
			'activitypub_show_advanced_tab',
			array(
				'type'              => 'integer',
				'description'       => 'Whether to show the advanced tab.',
				'single'            => true,
				'default'           => 0,
				'sanitize_callback' => 'absint',
			)
		);

		// Moderation user meta.
		\register_meta(
			'user',
			'activitypub_blocked_actors',
			array(
				'type'              => 'array',
				'description'       => 'User-specific blocked ActivityPub actors.',
				'single'            => true,
				'default'           => array(),
				'sanitize_callback' => array( Sanitize::class, 'identifier_list' ),
			)
		);

		\register_meta(
			'user',
			'activitypub_blocked_domains',
			array(
				'type'              => 'array',
				'description'       => 'User-specific blocked ActivityPub domains.',
				'single'            => true,
				'default'           => array(),
				'sanitize_callback' => static function ( $value ) {
					return \array_unique( \array_map( array( Sanitize::class, 'host_list' ), $value ) );
				},
			)
		);

		\register_meta(
			'user',
			'activitypub_blocked_keywords',
			array(
				'type'              => 'array',
				'description'       => 'User-specific blocked ActivityPub keywords.',
				'single'            => true,
				'default'           => array(),
				'sanitize_callback' => static function ( $value ) {
					return \array_map( 'sanitize_text_field', $value );
				},
			)
		);
	}

	/**
	 * Set default values for user options.
	 *
	 * @param bool|string $value  Option value.
	 * @return bool|string
	 */
	public static function user_options_default( $value ) {
		if ( false === $value ) {
			return '1';
		}

		return $value;
	}
}