base.php
| 1 | <?php |
| 2 | |
| 3 | /** |
| 4 | * All the code shared between WP.com Highlander and Jetpack Highlander |
| 5 | */ |
| 6 | class Highlander_Comments_Base { |
| 7 | function __construct() { |
| 8 | $this->setup_globals(); |
| 9 | $this->setup_actions(); |
| 10 | $this->setup_filters(); |
| 11 | } |
| 12 | |
| 13 | /** |
| 14 | * Set any global variables or class variables |
| 15 | * @since JetpackComments (1.4) |
| 16 | */ |
| 17 | protected function setup_globals() {} |
| 18 | |
| 19 | /** |
| 20 | * Setup actions for methods in this class |
| 21 | * @since JetpackComments (1.4) |
| 22 | */ |
| 23 | protected function setup_actions() { |
| 24 | // Before a comment is posted |
| 25 | add_action( 'pre_comment_on_post', array( $this, 'allow_logged_out_user_to_comment_as_external' ) ); |
| 26 | |
| 27 | // After a comment is posted |
| 28 | add_action( 'comment_post', array( $this, 'set_comment_cookies' ) ); |
| 29 | } |
| 30 | |
| 31 | /** |
| 32 | * Setup filters for methods in this class |
| 33 | * @since JetpackComments (1.4) |
| 34 | */ |
| 35 | protected function setup_filters() { |
| 36 | add_filter( 'comments_array', array( $this, 'comments_array' ) ); |
| 37 | add_filter( 'preprocess_comment', array( $this, 'allow_logged_in_user_to_comment_as_guest' ), 0 ); |
| 38 | } |
| 39 | |
| 40 | /** |
| 41 | * Is this a Highlander POST request? |
| 42 | * Optionally restrict to one or more credentials slug (facebook, twitter, ...) |
| 43 | * |
| 44 | * @param string Comment credentials slug |
| 45 | * @param ... |
| 46 | * @return false|string false if it's not a Highlander POST request. The matching credentials slug if it is. |
| 47 | */ |
| 48 | function is_highlander_comment_post( ...$args ) { |
| 49 | if ( empty( $_POST['hc_post_as'] ) ) { |
| 50 | return false; |
| 51 | } |
| 52 | |
| 53 | if ( $args ) { |
| 54 | foreach ( $args as $id_source ) { |
| 55 | if ( $id_source === $_POST['hc_post_as'] ) { |
| 56 | return $id_source; |
| 57 | } |
| 58 | } |
| 59 | return false; |
| 60 | } |
| 61 | |
| 62 | return is_string( $_POST['hc_post_as'] ) && in_array( $_POST['hc_post_as'], $this->id_sources ) ? $_POST['hc_post_as'] : false; |
| 63 | } |
| 64 | |
| 65 | /** |
| 66 | * Signs an array of scalars with the self-hosted blog's Jetpack Token |
| 67 | * |
| 68 | * @param array $parameters |
| 69 | * @param string $key |
| 70 | * @return string HMAC |
| 71 | */ |
| 72 | static function sign_remote_comment_parameters( $parameters, $key ) { |
| 73 | unset( |
| 74 | $parameters['sig'], // Don't sign the signature |
| 75 | $parameters['replytocom'] // This parameter is unsigned - it changes dynamically as the comment form moves from parent comment to parent comment |
| 76 | ); |
| 77 | |
| 78 | ksort( $parameters ); |
| 79 | |
| 80 | $signing = array(); |
| 81 | foreach ( $parameters as $k => $v ) { |
| 82 | if ( ! is_scalar( $v ) ) { |
| 83 | return new WP_Error( 'invalid_input', __( 'Invalid request', 'jetpack' ), array( 'status' => 400 ) ); |
| 84 | } |
| 85 | |
| 86 | $signing[] = "{$k}={$v}"; |
| 87 | } |
| 88 | |
| 89 | return hash_hmac( 'sha1', implode( ':', $signing ), $key ); |
| 90 | } |
| 91 | |
| 92 | /* |
| 93 | * After commenting as a guest while logged in, the user needs to see both: |
| 94 | * |
| 95 | * ( user_id = blah AND comment_approved = 0 ) |
| 96 | * and |
| 97 | * ( comment_author_email = blah AND comment_approved = 0 ) |
| 98 | * |
| 99 | * Core only does the first since the user is logged in. |
| 100 | * |
| 101 | * Add the second to the comments array. |
| 102 | */ |
| 103 | function comments_array( $comments ) { |
| 104 | global $wpdb, $post; |
| 105 | |
| 106 | $commenter = $this->get_current_commenter(); |
| 107 | |
| 108 | if ( ! $commenter['user_id'] ) { |
| 109 | return $comments; |
| 110 | } |
| 111 | |
| 112 | if ( ! $commenter['comment_author'] ) { |
| 113 | return $comments; |
| 114 | } |
| 115 | |
| 116 | $in_moderation_comments = $wpdb->get_results( |
| 117 | $wpdb->prepare( |
| 118 | "SELECT * FROM `$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() */", |
| 119 | $post->ID, |
| 120 | wp_specialchars_decode( $commenter['comment_author'], ENT_QUOTES ), |
| 121 | $commenter['comment_author_email'] |
| 122 | ) |
| 123 | ); |
| 124 | |
| 125 | if ( ! $in_moderation_comments ) { |
| 126 | return $comments; |
| 127 | } |
| 128 | |
| 129 | // @todo ZOMG this is a bad idea |
| 130 | $comments = array_merge( $comments, $in_moderation_comments ); |
| 131 | usort( $comments, array( $this, 'sort_comments_by_comment_date_gmt' ) ); |
| 132 | |
| 133 | return $comments; |
| 134 | } |
| 135 | |
| 136 | /** |
| 137 | * Comment sort comparator: comment_date_gmt |
| 138 | * |
| 139 | * @since JetpackComments (1.4) |
| 140 | * @param object $a |
| 141 | * @param object $b |
| 142 | * @return int |
| 143 | */ |
| 144 | public function sort_comments_by_comment_date_gmt( $a, $b ) { |
| 145 | if ( $a->comment_date_gmt == $b->comment_date_gmt ) { |
| 146 | return 0; |
| 147 | } |
| 148 | |
| 149 | return $a->comment_date_gmt < $b->comment_date_gmt ? -1 : 1; |
| 150 | } |
| 151 | |
| 152 | /** |
| 153 | * Get the current commenter's information from their cookie |
| 154 | * |
| 155 | * @since JetpackComments (1.4) |
| 156 | * @return array Commenters information from cookie |
| 157 | */ |
| 158 | protected function get_current_commenter() { |
| 159 | // Defaults |
| 160 | $user_id = 0; |
| 161 | $comment_author = ''; |
| 162 | $comment_author_email = ''; |
| 163 | $comment_author_url = ''; |
| 164 | |
| 165 | if ( isset( $_COOKIE[ 'comment_author_' . COOKIEHASH ] ) ) { |
| 166 | $comment_author = $_COOKIE[ 'comment_author_' . COOKIEHASH ]; |
| 167 | } |
| 168 | |
| 169 | if ( isset( $_COOKIE[ 'comment_author_email_' . COOKIEHASH ] ) ) { |
| 170 | $comment_author_email = $_COOKIE[ 'comment_author_email_' . COOKIEHASH ]; |
| 171 | } |
| 172 | |
| 173 | if ( isset( $_COOKIE[ 'comment_author_url_' . COOKIEHASH ] ) ) { |
| 174 | $comment_author_url = $_COOKIE[ 'comment_author_url_' . COOKIEHASH ]; |
| 175 | } |
| 176 | |
| 177 | if ( is_user_logged_in() ) { |
| 178 | $user = wp_get_current_user(); |
| 179 | $user_id = $user->ID; |
| 180 | } |
| 181 | |
| 182 | return compact( 'comment_author', 'comment_author_email', 'comment_author_url', 'user_id' ); |
| 183 | } |
| 184 | |
| 185 | /** |
| 186 | * Allows a logged out user to leave a comment as a facebook or twitter credentialed user. |
| 187 | * Overrides WordPress' core comment_registration option to treat these commenters as "registered" (verified) users. |
| 188 | * |
| 189 | * @since JetpackComments (1.4) |
| 190 | * @return If no |
| 191 | */ |
| 192 | function allow_logged_out_user_to_comment_as_external() { |
| 193 | if ( ! $this->is_highlander_comment_post( 'facebook', 'twitter', 'googleplus' ) ) { |
| 194 | return; |
| 195 | } |
| 196 | |
| 197 | add_filter( 'pre_option_comment_registration', '__return_zero' ); |
| 198 | add_filter( 'pre_option_require_name_email', '__return_zero' ); |
| 199 | } |
| 200 | |
| 201 | /** |
| 202 | * Allow a logged in user to post as a guest, FB, or twitter credentialed request. |
| 203 | * Bypasses WordPress' core overrides that force a logged in user to comment as that user. |
| 204 | * Respects comment_registration option. |
| 205 | * |
| 206 | * @since JetpackComments (1.4) |
| 207 | * @param array $comment_data |
| 208 | * @return int |
| 209 | */ |
| 210 | function allow_logged_in_user_to_comment_as_guest( $comment_data ) { |
| 211 | // Bail if user registration is allowed |
| 212 | if ( get_option( 'comment_registration' ) ) { |
| 213 | return $comment_data; |
| 214 | } |
| 215 | |
| 216 | // Bail if user is not logged in or not a post request |
| 217 | if ( 'POST' != strtoupper( $_SERVER['REQUEST_METHOD'] ) || ! is_user_logged_in() ) { |
| 218 | return $comment_data; |
| 219 | } |
| 220 | |
| 221 | // Bail if this is not a guest or external service credentialed request |
| 222 | if ( ! $this->is_highlander_comment_post( 'guest', 'facebook', 'twitter', 'googleplus' ) ) { |
| 223 | return $comment_data; |
| 224 | } |
| 225 | |
| 226 | $user = wp_get_current_user(); |
| 227 | |
| 228 | foreach ( array( |
| 229 | 'comment_author' => 'display_name', |
| 230 | 'comment_author_email' => 'user_email', |
| 231 | 'comment_author_url' => 'user_url', |
| 232 | ) as $comment_field => $user_field ) { |
| 233 | if ( $comment_data[ $comment_field ] != addslashes( $user->$user_field ) ) { |
| 234 | return $comment_data; // some other plugin already did something funky |
| 235 | } |
| 236 | } |
| 237 | |
| 238 | if ( get_option( 'require_name_email' ) ) { |
| 239 | if ( 6 > strlen( $_POST['email'] ) || empty( $_POST['author'] ) ) { |
| 240 | wp_die( __( 'Error: please fill the required fields (name, email).', 'jetpack' ), 400 ); |
| 241 | } elseif ( ! is_email( $_POST['email'] ) ) { |
| 242 | wp_die( __( 'Error: please enter a valid email address.', 'jetpack' ), 400 ); |
| 243 | } |
| 244 | } |
| 245 | |
| 246 | $author_change = false; |
| 247 | foreach ( array( |
| 248 | 'comment_author' => 'author', |
| 249 | 'comment_author_email' => 'email', |
| 250 | 'comment_author_url' => 'url', |
| 251 | ) as $comment_field => $post_field ) { |
| 252 | if ( $comment_data[ $comment_field ] != $_POST[ $post_field ] && 'url' != $post_field ) { |
| 253 | $author_change = true; |
| 254 | } |
| 255 | $comment_data[ $comment_field ] = $_POST[ $post_field ]; |
| 256 | } |
| 257 | |
| 258 | // Mark as guest comment if name or email were changed |
| 259 | if ( $author_change ) { |
| 260 | $comment_data['user_id'] = $comment_data['user_ID'] = 0; |
| 261 | } |
| 262 | |
| 263 | return $comment_data; |
| 264 | } |
| 265 | |
| 266 | /** |
| 267 | * Set the comment cookies or bail if comment is invalid |
| 268 | * |
| 269 | * @since JetpackComments (1.4) |
| 270 | * @param type $comment_id |
| 271 | * @return If comment is invalid |
| 272 | */ |
| 273 | public function set_comment_cookies( $comment_id ) { |
| 274 | // Get comment and bail if it's invalid somehow |
| 275 | $comment = get_comment( $comment_id ); |
| 276 | if ( empty( $comment ) || is_wp_error( $comment ) ) { |
| 277 | return; |
| 278 | } |
| 279 | |
| 280 | $id_source = $this->is_highlander_comment_post(); |
| 281 | if ( empty( $id_source ) ) { |
| 282 | return; |
| 283 | } |
| 284 | |
| 285 | // Set comment author cookies |
| 286 | // phpcs:ignore WordPress.WP.CapitalPDangit |
| 287 | if ( ( 'wordpress' != $id_source ) && is_user_logged_in() ) { |
| 288 | /** This filter is already documented in core/wp-includes/comment-functions.php */ |
| 289 | $comment_cookie_lifetime = apply_filters( 'comment_cookie_lifetime', 30000000 ); |
| 290 | setcookie( 'comment_author_' . COOKIEHASH, $comment->comment_author, time() + $comment_cookie_lifetime, COOKIEPATH, COOKIE_DOMAIN ); |
| 291 | setcookie( 'comment_author_email_' . COOKIEHASH, $comment->comment_author_email, time() + $comment_cookie_lifetime, COOKIEPATH, COOKIE_DOMAIN ); |
| 292 | setcookie( 'comment_author_url_' . COOKIEHASH, esc_url( $comment->comment_author_url ), time() + $comment_cookie_lifetime, COOKIEPATH, COOKIE_DOMAIN ); |
| 293 | } |
| 294 | } |
| 295 | |
| 296 | /** |
| 297 | * Get an avatar from Photon |
| 298 | * |
| 299 | * @since JetpackComments (1.4) |
| 300 | * @param string $url |
| 301 | * @param int $size |
| 302 | * @return string |
| 303 | */ |
| 304 | protected function photon_avatar( $url, $size ) { |
| 305 | $size = (int) $size; |
| 306 | |
| 307 | return jetpack_photon_url( $url, array( 'resize' => "$size,$size" ) ); |
| 308 | } |
| 309 | } |
| 310 |