48 lines
		
	
	
		
			1.1 KiB
		
	
	
	
		
			PHP
		
	
	
	
	
	
			
		
		
	
	
			48 lines
		
	
	
		
			1.1 KiB
		
	
	
	
		
			PHP
		
	
	
	
	
	
<?php
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namespace Activitypub\Handler;
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use Activitypub\Collection\Users;
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use Activitypub\Collection\Followers;
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/**
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 * Handle Undo requests
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 */
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class Undo {
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	/**
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	 * Initialize the class, registering WordPress hooks
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	 */
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	public static function init() {
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		\add_action(
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			'activitypub_inbox_undo',
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			array( self::class, 'handle_undo' )
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		);
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	}
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	/**
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	 * Handle "Unfollow" requests
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	 *
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	 * @param array $activity The JSON "Undo" Activity
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	 * @param int   $user_id  The ID of the ID of the WordPress User
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	 */
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	public static function handle_undo( $activity ) {
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		if (
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			isset( $activity['object']['type'] ) &&
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			'Follow' === $activity['object']['type'] &&
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			isset( $activity['object']['object'] ) &&
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			filter_var( $activity['object']['object'], FILTER_VALIDATE_URL )
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		) {
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			$user = Users::get_by_resource( $activity['object']['object'] );
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			if ( ! $user || is_wp_error( $user ) ) {
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				// If we can not find a user,
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				// we can not initiate a follow process
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				return;
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			}
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			$user_id = $user->get__id();
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			Followers::remove_follower( $user_id, $activity['actor'] );
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		}
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	}
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}
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