294 lines
9 KiB
PHP
294 lines
9 KiB
PHP
<?php
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/**
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* All the code shared between WP.com Highlander and Jetpack Highlander
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*/
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class Highlander_Comments_Base {
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function __construct() {
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$this->setup_globals();
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$this->setup_actions();
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$this->setup_filters();
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}
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/**
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* Set any global variables or class variables
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* @since JetpackComments (1.4)
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*/
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protected function setup_globals() {}
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/**
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* Setup actions for methods in this class
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* @since JetpackComments (1.4)
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*/
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protected function setup_actions() {
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// Before a comment is posted
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add_action( 'pre_comment_on_post', array( $this, 'allow_logged_out_user_to_comment_as_external' ) );
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// After a comment is posted
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add_action( 'comment_post', array( $this, 'set_comment_cookies' ) );
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}
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/**
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* Setup filters for methods in this class
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* @since JetpackComments (1.4)
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*/
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protected function setup_filters() {
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add_filter( 'comments_array', array( $this, 'comments_array' ) );
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add_filter( 'preprocess_comment', array( $this, 'allow_logged_in_user_to_comment_as_guest' ), 0 );
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}
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/**
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* Is this a Highlander POST request?
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* Optionally restrict to one or more credentials slug (facebook, twitter, ...)
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*
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* @param string Comment credentials slug
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* @param ...
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* @return false|string false if it's not a Highlander POST request. The matching credentials slug if it is.
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*/
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function is_highlander_comment_post() {
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if ( empty( $_POST['hc_post_as'] ) ) {
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return false;
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}
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if ( func_num_args() ) {
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foreach ( func_get_args() as $id_source ) {
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if ( $id_source === $_POST['hc_post_as'] ) {
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return $id_source;
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}
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}
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return false;
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}
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return is_string( $_POST['hc_post_as'] ) && in_array( $_POST['hc_post_as'], $this->id_sources ) ? $_POST['hc_post_as'] : false;
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}
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/**
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* Signs an array of scalars with the self-hosted blog's Jetpack Token
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*
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* @param array $parameters
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* @param string $key
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* @return string HMAC
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*/
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static function sign_remote_comment_parameters( $parameters, $key ) {
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unset(
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$parameters['sig'], // Don't sign the signature
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$parameters['replytocom'] // This parameter is unsigned - it changes dynamically as the comment form moves from parent comment to parent comment
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);
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ksort( $parameters );
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$signing = array();
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foreach ( $parameters as $k => $v ) {
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if ( !is_scalar( $v ) ) {
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return new WP_Error( 'invalid_input', __( 'Invalid request', 'jetpack' ) );
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}
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$signing[] = "{$k}={$v}";
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}
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return hash_hmac( 'sha1', implode( ':', $signing ), $key );
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}
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/*
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* After commenting as a guest while logged in, the user needs to see both:
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*
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* ( user_id = blah AND comment_approved = 0 )
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* and
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* ( comment_author_email = blah AND comment_approved = 0 )
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*
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* Core only does the first since the user is logged in.
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*
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* Add the second to the comments array.
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*/
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function comments_array( $comments ) {
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global $wpdb, $post;
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$commenter = $this->get_current_commenter();
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if ( !$commenter['user_id'] )
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return $comments;
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if ( !$commenter['comment_author'] )
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return $comments;
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$in_moderation_comments = $wpdb->get_results( $wpdb->prepare(
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"SELECT * FROM `$wpdb->comments` WHERE `comment_post_ID` = %d AND `user_id` = 0 AND `comment_author` = %s AND `comment_author_email` = %s AND `comment_approved` = '0' ORDER BY `comment_date_gmt` /* Highlander_Comments_Base::comments_array() */",
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$post->ID,
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wp_specialchars_decode( $commenter['comment_author'], ENT_QUOTES ),
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$commenter['comment_author_email']
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) );
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if ( !$in_moderation_comments )
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return $comments;
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// @todo ZOMG this is a bad idea
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$comments = array_merge( $comments, $in_moderation_comments );
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usort( $comments, array( $this, 'sort_comments_by_comment_date_gmt' ) );
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return $comments;
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}
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/**
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* Comment sort comparator: comment_date_gmt
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*
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* @since JetpackComments (1.4)
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* @param object $a
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* @param object $b
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* @return int
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*/
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public function sort_comments_by_comment_date_gmt( $a, $b ) {
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if ( $a->comment_date_gmt == $b->comment_date_gmt ) {
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return 0;
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}
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return $a->comment_date_gmt < $b->comment_date_gmt ? -1 : 1;
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}
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/**
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* Get the current commenter's information from their cookie
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*
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* @since JetpackComments (1.4)
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* @return array Commenters information from cookie
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*/
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protected function get_current_commenter() {
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// Defaults
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$user_id = 0;
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$comment_author = '';
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$comment_author_email = '';
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$comment_author_url = '';
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if ( isset( $_COOKIE['comment_author_' . COOKIEHASH] ) ) {
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$comment_author = $_COOKIE['comment_author_' . COOKIEHASH];
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}
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if ( isset( $_COOKIE['comment_author_email_' . COOKIEHASH] ) ) {
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$comment_author_email = $_COOKIE['comment_author_email_' . COOKIEHASH];
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}
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if ( isset( $_COOKIE['comment_author_url_' . COOKIEHASH] ) ) {
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$comment_author_url = $_COOKIE['comment_author_url_' . COOKIEHASH];
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}
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if ( is_user_logged_in() ) {
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$user = wp_get_current_user();
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$user_id = $user->ID;
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}
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return compact( 'comment_author', 'comment_author_email', 'comment_author_url', 'user_id' );
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}
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/**
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* Allows a logged out user to leave a comment as a facebook or twitter credentialed user.
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* Overrides WordPress' core comment_registration option to treat these commenters as "registered" (verified) users.
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*
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* @since JetpackComments (1.4)
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* @return If no
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*/
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function allow_logged_out_user_to_comment_as_external() {
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if ( !$this->is_highlander_comment_post( 'facebook', 'twitter', 'googleplus' ) ) {
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return;
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}
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add_filter( 'pre_option_comment_registration', '__return_zero' );
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}
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/**
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* Allow a logged in user to post as a guest, FB, or twitter credentialed request.
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* Bypasses WordPress' core overrides that force a logged in user to comment as that user.
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* Respects comment_registration option.
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*
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* @since JetpackComments (1.4)
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* @param array $comment_data
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* @return int
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*/
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function allow_logged_in_user_to_comment_as_guest( $comment_data ) {
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// Bail if user registration is allowed
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if ( get_option( 'comment_registration' ) ) {
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return $comment_data;
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}
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// Bail if user is not logged in or not a post request
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if ( 'POST' != strtoupper( $_SERVER['REQUEST_METHOD'] ) || !is_user_logged_in() ) {
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return $comment_data;
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}
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// Bail if this is not a guest or external service credentialed request
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if ( !$this->is_highlander_comment_post( 'guest', 'facebook', 'twitter', 'googleplus' ) ) {
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return $comment_data;
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}
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$user = wp_get_current_user();
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foreach ( array( 'comment_author' => 'display_name', 'comment_author_email' => 'user_email', 'comment_author_url' => 'user_url' ) as $comment_field => $user_field ) {
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if ( $comment_data[$comment_field] != addslashes( $user->$user_field ) ) {
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return $comment_data; // some other plugin already did something funky
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}
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}
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if ( get_option( 'require_name_email' ) ) {
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if ( 6 > strlen( $_POST['email'] ) || empty( $_POST['author'] ) ) {
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wp_die( __( 'Error: please fill the required fields (name, email).', 'jetpack' ) );
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} elseif ( ! is_email( $_POST['email'] ) ) {
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wp_die( __( 'Error: please enter a valid email address.', 'jetpack' ) );
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}
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}
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$author_change = false;
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foreach ( array( 'comment_author' => 'author', 'comment_author_email' => 'email', 'comment_author_url' => 'url' ) as $comment_field => $post_field ) {
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if ( $comment_data[$comment_field] != $_POST[$post_field] && 'url' != $post_field ) {
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$author_change = true;
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}
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$comment_data[$comment_field] = $_POST[$post_field];
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}
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// Mark as guest comment if name or email were changed
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if ( $author_change ) {
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$comment_data['user_id'] = $comment_data['user_ID'] = 0;
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}
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return $comment_data;
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}
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/**
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* Set the comment cookies or bail if comment is invalid
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*
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* @since JetpackComments (1.4)
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* @param type $comment_id
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* @return If comment is invalid
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*/
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public function set_comment_cookies( $comment_id ) {
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// Get comment and bail if it's invalid somehow
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$comment = get_comment( $comment_id );
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if ( empty( $comment ) || is_wp_error( $comment ) ) {
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return;
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}
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$id_source = $this->is_highlander_comment_post();
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if ( empty( $id_source ) ) {
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return;
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}
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// Set comment author cookies
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if ( ( 'wordpress' != $id_source ) && is_user_logged_in() ) {
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/** This filter is already documented in core/wp-includes/comment-functions.php */
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$comment_cookie_lifetime = apply_filters( 'comment_cookie_lifetime', 30000000 );
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setcookie( 'comment_author_' . COOKIEHASH, $comment->comment_author, time() + $comment_cookie_lifetime, COOKIEPATH, COOKIE_DOMAIN );
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setcookie( 'comment_author_email_' . COOKIEHASH, $comment->comment_author_email, time() + $comment_cookie_lifetime, COOKIEPATH, COOKIE_DOMAIN );
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setcookie( 'comment_author_url_' . COOKIEHASH, esc_url($comment->comment_author_url), time() + $comment_cookie_lifetime, COOKIEPATH, COOKIE_DOMAIN );
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}
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}
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/**
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* Get an avatar from Photon
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*
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* @since JetpackComments (1.4)
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* @param string $url
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* @param int $size
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* @return string
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*/
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protected function photon_avatar( $url, $size ) {
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$size = (int) $size;
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return jetpack_photon_url( $url, array( 'resize' => "$size,$size" ) );
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}
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}
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