Duplicate code is one of the most pungent code smells. A rule that is often used is to re-structure code once it is duplicated in three or more places.
Common duplication problems, and corresponding solutions are:
Complex classes like Publicize_Base often do a lot of different things. To break such a class down, we need to identify a cohesive component within that class. A common approach to find such a component is to look for fields/methods that share the same prefixes, or suffixes. You can also have a look at the cohesion graph to spot any un-connected, or weakly-connected components.
Once you have determined the fields that belong together, you can apply the Extract Class refactoring. If the component makes sense as a sub-class, Extract Subclass is also a candidate, and is often faster.
While breaking up the class, it is a good idea to analyze how other classes use Publicize_Base, and based on these observations, apply Extract Interface, too.
| 1 | <?php |
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| 7 | abstract class Publicize_Base { |
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| 8 | |||
| 9 | /** |
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| 10 | * Services that are currently connected to the given user |
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| 11 | * through publicize. |
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| 12 | */ |
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| 13 | public $connected_services = array(); |
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| 14 | |||
| 15 | /** |
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| 16 | * Services that are supported by publicize. They don't |
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| 17 | * necessarily need to be connected to the current user. |
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| 18 | */ |
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| 19 | public $services; |
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| 20 | |||
| 21 | /** |
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| 22 | * key names for post meta |
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| 23 | */ |
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| 24 | public $ADMIN_PAGE = 'wpas'; |
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| 25 | public $POST_MESS = '_wpas_mess'; |
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| 26 | |||
| 27 | /** |
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| 28 | * Post meta key for flagging when the post is a tweetstorm. |
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| 29 | * |
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| 30 | * @var string |
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| 31 | */ |
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| 32 | public $POST_TWEETSTORM = '_wpas_is_tweetstorm'; |
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| 33 | |||
| 34 | public $POST_SKIP = '_wpas_skip_'; // connection id appended to indicate that a connection should NOT be publicized to |
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| 35 | public $POST_DONE = '_wpas_done_'; // connection id appended to indicate a connection has already been publicized to |
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| 36 | public $USER_AUTH = 'wpas_authorize'; |
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| 37 | public $USER_OPT = 'wpas_'; |
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| 38 | public $PENDING = '_publicize_pending'; // ready for Publicize to do its thing |
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| 39 | public $POST_SERVICE_DONE = '_publicize_done_external'; // array of external ids where we've Publicized |
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| 40 | |||
| 41 | /** |
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| 42 | * default pieces of the message used in constructing the |
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| 43 | * content pushed out to other social networks |
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| 44 | */ |
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| 45 | |||
| 46 | public $default_prefix = ''; |
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| 47 | public $default_message = '%title%'; |
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| 48 | public $default_suffix = ' '; |
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| 49 | |||
| 50 | /** |
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| 51 | * What WP capability is require to create/delete global connections? |
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| 52 | * All users with this cap can un-globalize all other global connections, and globalize any of their own |
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| 53 | * Globalized connections cannot be unselected by users without this capability when publishing |
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| 54 | */ |
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| 55 | public $GLOBAL_CAP = 'publish_posts'; |
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| 56 | |||
| 57 | /** |
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| 58 | * Sets up the basics of Publicize |
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| 59 | */ |
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| 60 | function __construct() { |
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| 136 | |||
| 137 | /* |
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| 138 | * Services: Facebook, Twitter, etc. |
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| 139 | */ |
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| 140 | |||
| 141 | /** |
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| 142 | * Get services for the given blog and user. |
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| 143 | * |
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| 144 | * Can return all available services or just the ones with an active connection. |
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| 145 | * |
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| 146 | * @param string $filter |
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| 147 | * 'all' (default) - Get all services available for connecting |
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| 148 | * 'connected' - Get all services currently connected |
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| 149 | * @param false|int $_blog_id The blog ID. Use false (default) for the current blog |
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| 150 | * @param false|int $_user_id The user ID. Use false (default) for the current user |
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| 151 | * @return array |
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| 152 | */ |
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| 153 | abstract function get_services( $filter = 'all', $_blog_id = false, $_user_id = false ); |
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| 154 | |||
| 155 | function can_connect_service( $service_name ) { |
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| 158 | |||
| 159 | /** |
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| 160 | * Does the given user have a connection to the service on the given blog? |
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| 161 | * |
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| 162 | * @param string $service_name 'facebook', 'twitter', etc. |
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| 163 | * @param false|int $_blog_id The blog ID. Use false (default) for the current blog |
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| 164 | * @param false|int $_user_id The user ID. Use false (default) for the current user |
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| 165 | * @return bool |
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| 166 | */ |
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| 167 | function is_enabled( $service_name, $_blog_id = false, $_user_id = false ) { |
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| 177 | |||
| 178 | /** |
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| 179 | * Generates a connection URL. |
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| 180 | * |
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| 181 | * This is the URL, which, when visited by the user, starts the authentication |
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| 182 | * process required to forge a connection. |
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| 183 | * |
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| 184 | * @param string $service_name 'facebook', 'twitter', etc. |
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| 185 | * @return string |
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| 186 | */ |
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| 187 | abstract function connect_url( $service_name ); |
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| 188 | |||
| 189 | /** |
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| 190 | * Generates a Connection refresh URL. |
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| 191 | * |
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| 192 | * This is the URL, which, when visited by the user, re-authenticates their |
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| 193 | * connection to the service. |
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| 194 | * |
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| 195 | * @param string $service_name 'facebook', 'twitter', etc. |
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| 196 | * @return string |
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| 197 | */ |
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| 198 | abstract function refresh_url( $service_name ); |
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| 199 | |||
| 200 | /** |
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| 201 | * Generates a disconnection URL. |
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| 202 | * |
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| 203 | * This is the URL, which, when visited by the user, breaks their connection |
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| 204 | * with the service. |
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| 205 | * |
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| 206 | * @param string $service_name 'facebook', 'twitter', etc. |
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| 207 | * @param string $connection_id Connection ID |
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| 208 | * @return string |
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| 209 | */ |
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| 210 | abstract function disconnect_url( $service_name, $connection_id ); |
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| 211 | |||
| 212 | /** |
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| 213 | * Returns a display name for the Service |
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| 214 | * |
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| 215 | * @param string $service_name 'facebook', 'twitter', etc. |
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| 216 | * @return string |
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| 217 | */ |
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| 218 | public static function get_service_label( $service_name ) { |
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| 235 | |||
| 236 | /* |
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| 237 | * Connections: For each Service, there can be multiple connections |
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| 238 | * for a given user. For example, one user could be connected to Twitter |
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| 239 | * as both @jetpack and as @wordpressdotcom |
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| 240 | * |
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| 241 | * For historical reasons, Connections are represented as an object |
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| 242 | * on WordPress.com and as an array in Jetpack. |
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| 243 | */ |
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| 244 | |||
| 245 | /** |
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| 246 | * Get the active Connections of a Service |
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| 247 | * |
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| 248 | * @param string $service_name 'facebook', 'twitter', etc. |
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| 249 | * @param false|int $_blog_id The blog ID. Use false (default) for the current blog |
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| 250 | * @param false|int $_user_id The user ID. Use false (default) for the current user |
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| 251 | * @return false|object[]|array[] false if no connections exist |
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| 252 | */ |
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| 253 | abstract function get_connections( $service_name, $_blog_id = false, $_user_id = false ); |
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| 254 | |||
| 255 | /** |
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| 256 | * Get a single Connection of a Service |
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| 257 | * |
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| 258 | * @param string $service_name 'facebook', 'twitter', etc. |
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| 259 | * @param string $connection_id Connection ID |
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| 260 | * @param false|int $_blog_id The blog ID. Use false (default) for the current blog |
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| 261 | * @param false|int $_user_id The user ID. Use false (default) for the current user |
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| 262 | * @return false|object[]|array[] false if no connections exist |
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| 263 | */ |
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| 264 | abstract function get_connection( $service_name, $connection_id, $_blog_id = false, $_user_id = false ); |
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| 265 | |||
| 266 | /** |
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| 267 | * Get the Connection ID. |
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| 268 | * |
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| 269 | * Note that this is different than the Connection's uniqueid. |
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| 270 | * |
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| 271 | * Via a quirk of history, ID is globally unique and unique_id |
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| 272 | * is only unique per site. |
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| 273 | * |
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| 274 | * @param object|array The Connection object (WordPress.com) or array (Jetpack) |
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| 275 | * @return string |
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| 276 | */ |
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| 277 | abstract function get_connection_id( $connection ); |
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| 278 | |||
| 279 | /** |
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| 280 | * Get the Connection unique_id |
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| 281 | * |
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| 282 | * Note that this is different than the Connections ID. |
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| 283 | * |
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| 284 | * Via a quirk of history, ID is globally unique and unique_id |
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| 285 | * is only unique per site. |
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| 286 | * |
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| 287 | * @param object|array The Connection object (WordPress.com) or array (Jetpack) |
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| 288 | * @return string |
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| 289 | */ |
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| 290 | abstract function get_connection_unique_id( $connection ); |
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| 291 | |||
| 292 | /** |
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| 293 | * Get the Connection's Meta data |
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| 294 | * |
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| 295 | * @param object|array Connection |
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| 296 | * @return array Connection Meta |
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| 297 | */ |
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| 298 | abstract function get_connection_meta( $connection ); |
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| 299 | |||
| 300 | /** |
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| 301 | * Disconnect a Connection |
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| 302 | * |
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| 303 | * @param string $service_name 'facebook', 'twitter', etc. |
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| 304 | * @param string $connection_id Connection ID |
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| 305 | * @param false|int $_blog_id The blog ID. Use false (default) for the current blog |
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| 306 | * @param false|int $_user_id The user ID. Use false (default) for the current user |
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| 307 | * @param bool $force_delete Whether to skip permissions checks |
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| 308 | * @return false|void False on failure. Void on success. |
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| 309 | */ |
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| 310 | abstract function disconnect( $service_name, $connection_id, $_blog_id = false, $_user_id = false, $force_delete = false ); |
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| 311 | |||
| 312 | /** |
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| 313 | * Globalizes a Connection |
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| 314 | * |
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| 315 | * @param string $connection_id Connection ID |
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| 316 | * @return bool Falsey on failure. Truthy on success. |
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| 317 | */ |
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| 318 | abstract function globalize_connection( $connection_id ); |
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| 319 | |||
| 320 | /** |
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| 321 | * Unglobalizes a Connection |
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| 322 | * |
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| 323 | * @param string $connection_id Connection ID |
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| 324 | * @return bool Falsey on failure. Truthy on success. |
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| 325 | */ |
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| 326 | abstract function unglobalize_connection( $connection_id ); |
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| 327 | |||
| 328 | /** |
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| 329 | * Returns an external URL to the Connection's profile |
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| 330 | * |
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| 331 | * @param string $service_name 'facebook', 'twitter', etc. |
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| 332 | * @param object|array The Connection object (WordPress.com) or array (Jetpack) |
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| 333 | * @return false|string False on failure. URL on success. |
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| 334 | */ |
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| 335 | function get_profile_link( $service_name, $connection ) { |
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| 371 | |||
| 372 | /** |
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| 373 | * Returns a display name for the Connection |
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| 374 | * |
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| 375 | * @param string $service_name 'facebook', 'twitter', etc. |
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| 376 | * @param object|array The Connection object (WordPress.com) or array (Jetpack) |
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| 377 | * @return string |
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| 378 | */ |
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| 379 | function get_display_name( $service_name, $connection ) { |
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| 395 | |||
| 396 | /** |
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| 397 | * Whether the user needs to select additional options after connecting |
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| 398 | * |
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| 399 | * @param string $service_name 'facebook', 'twitter', etc. |
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| 400 | * @param object|array The Connection object (WordPress.com) or array (Jetpack) |
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| 401 | * @return bool |
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| 402 | */ |
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| 403 | function show_options_popup( $service_name, $connection ) { |
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| 426 | |||
| 427 | /** |
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| 428 | * Whether the Connection is "valid" wrt Facebook's requirements. |
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| 429 | * |
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| 430 | * Must be connected to a Page (not a Profile). |
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| 431 | * (Also returns true if we're in the middle of the connection process) |
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| 432 | * |
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| 433 | * @param object|array The Connection object (WordPress.com) or array (Jetpack) |
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| 434 | * @return bool |
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| 435 | */ |
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| 436 | function is_valid_facebook_connection( $connection ) { |
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| 444 | |||
| 445 | /** |
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| 446 | * LinkedIn needs to be reauthenticated to use v2 of their API. |
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| 447 | * If it's using LinkedIn old API, it's an 'invalid' connection |
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| 448 | * |
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| 449 | * @param object|array The Connection object (WordPress.com) or array (Jetpack) |
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| 450 | * @return bool |
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| 451 | */ |
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| 452 | function is_invalid_linkedin_connection( $connection ) { |
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| 457 | |||
| 458 | /** |
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| 459 | * Whether the Connection currently being connected |
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| 460 | * |
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| 461 | * @param object|array The Connection object (WordPress.com) or array (Jetpack) |
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| 462 | * @return bool |
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| 463 | */ |
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| 464 | function is_connecting_connection( $connection ) { |
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| 469 | |||
| 470 | /** |
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| 471 | * AJAX Handler to run connection tests on all Connections |
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| 472 | * @return void |
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| 473 | */ |
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| 474 | function test_publicize_conns() { |
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| 477 | |||
| 478 | /** |
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| 479 | * Run connection tests on all Connections |
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| 480 | * |
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| 481 | * @return array { |
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| 482 | * Array of connection test results. |
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| 483 | * |
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| 484 | * @type string 'connectionID' Connection identifier string that is unique for each connection |
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| 485 | * @type string 'serviceName' Slug of the connection's service (facebook, twitter, ...) |
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| 486 | * @type bool 'connectionTestPassed' Whether the connection test was successful |
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| 487 | * @type string 'connectionTestMessage' Test success or error message |
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| 488 | * @type bool 'userCanRefresh' Whether the user can re-authenticate their connection to the service |
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| 489 | * @type string 'refreshText' Message instructing user to re-authenticate their connection to the service |
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| 490 | * @type string 'refreshURL' URL, which, when visited by the user, re-authenticates their connection to the service. |
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| 491 | * @type string 'unique_id' ID string representing connection |
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| 492 | * } |
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| 493 | */ |
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| 494 | function get_publicize_conns_test_results() { |
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| 560 | |||
| 561 | /** |
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| 562 | * Run the connection test for the Connection |
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| 563 | * |
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| 564 | * @param string $service_name 'facebook', 'twitter', etc. |
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| 565 | * @param object|array The Connection object (WordPress.com) or array (Jetpack) |
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| 566 | * @return WP_Error|true WP_Error on failure. True on success |
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| 567 | */ |
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| 568 | abstract function test_connection( $service_name, $connection ); |
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| 569 | |||
| 570 | /** |
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| 571 | * Retrieves current list of connections and applies filters. |
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| 572 | * |
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| 573 | * Retrieves current available connections and checks if the connections |
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| 574 | * have already been used to share current post. Finally, the checkbox |
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| 575 | * form UI fields are calculated. This function exposes connection form |
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| 576 | * data directly as array so it can be retrieved for static HTML generation |
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| 577 | * or JSON consumption. |
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| 578 | * |
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| 579 | * @since 6.7.0 |
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| 580 | * |
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| 581 | * @param integer $selected_post_id Optional. Post ID to query connection status for. |
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| 582 | * |
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| 583 | * @return array { |
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| 584 | * Array of UI setup data for connection list form. |
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| 585 | * |
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| 586 | * @type string 'unique_id' ID string representing connection |
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| 587 | * @type string 'service_name' Slug of the connection's service (facebook, twitter, ...) |
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| 588 | * @type string 'service_label' Service Label (Facebook, Twitter, ...) |
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| 589 | * @type string 'display_name' Connection's human-readable Username: "@jetpack" |
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| 590 | * @type bool 'enabled' Default value for the connection (e.g., for a checkbox). |
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| 591 | * @type bool 'done' Has this connection already been publicized to? |
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| 592 | * @type bool 'toggleable' Is the user allowed to change the value for the connection? |
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| 593 | * @type bool 'global' Is this connection a global one? |
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| 594 | * } |
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| 595 | */ |
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| 596 | public function get_filtered_connection_data( $selected_post_id = null ) { |
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| 731 | |||
| 732 | /** |
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| 733 | * Checks if post has already been shared by Publicize in the past. |
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| 734 | * |
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| 735 | * @since 6.7.0 |
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| 736 | * |
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| 737 | * @param integer $post_id Optional. Post ID to query connection status for: will use current post if missing. |
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| 738 | * |
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| 739 | * @return bool True if post has already been shared by Publicize, false otherwise. |
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| 740 | */ |
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| 741 | abstract public function post_is_done_sharing( $post_id = null ); |
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| 742 | |||
| 743 | /** |
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| 744 | * Retrieves full list of available Publicize connection services. |
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| 745 | * |
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| 746 | * Retrieves current available publicize service connections |
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| 747 | * with associated labels and URLs. |
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| 748 | * |
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| 749 | * @since 6.7.0 |
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| 750 | * |
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| 751 | * @return array { |
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| 752 | * Array of UI service connection data for all services |
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| 753 | * |
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| 754 | * @type string 'name' Name of service. |
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| 755 | * @type string 'label' Display label for service. |
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| 756 | * @type string 'url' URL for adding connection to service. |
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| 757 | * } |
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| 758 | */ |
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| 759 | function get_available_service_data() { |
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| 773 | |||
| 774 | /* |
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| 775 | * Site Data |
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| 776 | */ |
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| 777 | |||
| 778 | function user_id() { |
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| 781 | |||
| 782 | function blog_id() { |
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| 785 | |||
| 786 | /* |
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| 787 | * Posts |
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| 788 | */ |
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| 789 | |||
| 790 | /** |
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| 791 | * Checks old and new status to see if the post should be flagged as |
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| 792 | * ready to Publicize. |
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| 793 | * |
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| 794 | * Attached to the `transition_post_status` filter. |
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| 795 | * |
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| 796 | * @param string $new_status |
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| 797 | * @param string $old_status |
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| 798 | * @param WP_Post $post |
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| 799 | * @return void |
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| 800 | */ |
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| 801 | abstract function flag_post_for_publicize( $new_status, $old_status, $post ); |
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| 802 | |||
| 803 | /** |
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| 804 | * Ensures the Post internal post-type supports `publicize` |
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| 805 | * |
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| 806 | * This feature support flag is used by the REST API. |
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| 807 | */ |
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| 808 | function add_post_type_support() { |
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| 811 | |||
| 812 | /** |
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| 813 | * Register the Publicize Gutenberg extension |
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| 814 | */ |
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| 815 | function register_gutenberg_extension() { |
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| 826 | |||
| 827 | /** |
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| 828 | * Can the current user access Publicize Data. |
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| 829 | * |
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| 830 | * @param int $post_id. 0 for general access. Post_ID for specific access. |
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| 831 | * @return bool |
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| 832 | */ |
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| 833 | function current_user_can_access_publicize_data( $post_id = 0 ) { |
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| 851 | |||
| 852 | /** |
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| 853 | * Auth callback for the protected ->POST_MESS post_meta |
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| 854 | * |
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| 855 | * @param bool $allowed |
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| 856 | * @param string $meta_key |
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| 857 | * @param int $object_id Post ID |
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| 858 | * @return bool |
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| 859 | */ |
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| 860 | function message_meta_auth_callback( $allowed, $meta_key, $object_id ) { |
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| 863 | |||
| 864 | /** |
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| 865 | * Registers the post_meta for use in the REST API. |
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| 866 | * |
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| 867 | * Registers for each post type that with `publicize` feature support. |
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| 868 | */ |
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| 869 | function register_post_meta() { |
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| 904 | |||
| 905 | /** |
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| 906 | * Fires when a post is saved, checks conditions and saves state in postmeta so that it |
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| 907 | * can be picked up later by @see ::publicize_post() on WordPress.com codebase. |
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| 908 | * |
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| 909 | * Attached to the `save_post` action. |
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| 910 | * |
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| 911 | * @param int $post_id |
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| 912 | * @param WP_Post $post |
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| 913 | * @return void |
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| 914 | */ |
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| 915 | function save_meta( $post_id, $post ) { |
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| 1071 | |||
| 1072 | /** |
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| 1073 | * Alters the "Post Published" message to include information about where the post |
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| 1074 | * was Publicized to. |
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| 1075 | * |
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| 1076 | * Attached to the `post_updated_messages` filter |
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| 1077 | * |
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| 1078 | * @param string[] $messages |
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| 1079 | * @return string[] |
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| 1080 | */ |
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| 1081 | public function update_published_message( $messages ) { |
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| 1147 | |||
| 1148 | /** |
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| 1149 | * Get the Connections the Post was just Publicized to. |
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| 1150 | * |
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| 1151 | * Only reliable just after the Post was published. |
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| 1152 | * |
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| 1153 | * @param int $post_id |
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| 1154 | * @return string[] Array of Service display name => Connection display name |
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| 1155 | */ |
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| 1156 | function get_publicizing_services( $post_id ) { |
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| 1178 | |||
| 1179 | /** |
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| 1180 | * Is the post Publicize-able? |
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| 1181 | * |
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| 1182 | * Only valid prior to Publicizing a Post. |
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| 1183 | * |
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| 1184 | * @param WP_Post $post |
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| 1185 | * @return bool |
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| 1186 | */ |
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| 1187 | function post_is_publicizeable( $post ) { |
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| 1202 | |||
| 1203 | /** |
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| 1204 | * Is a given post type Publicize-able? |
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| 1205 | * |
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| 1206 | * Not every CPT lends itself to Publicize-ation. Allow CPTs to register by adding their CPT via |
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| 1207 | * the publicize_post_types array filter. |
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| 1208 | * |
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| 1209 | * @param string $post_type The post type to check. |
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| 1210 | * @return bool True if the post type can be Publicized. |
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| 1211 | */ |
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| 1212 | function post_type_is_publicizeable( $post_type ) { |
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| 1218 | |||
| 1219 | /** |
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| 1220 | * Already-published posts should not be Publicized by default. This filter sets checked to |
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| 1221 | * false if a post has already been published. |
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| 1222 | * |
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| 1223 | * Attached to the `publicize_checkbox_default` filter |
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| 1224 | * |
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| 1225 | * @param bool $checked |
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| 1226 | * @param int $post_id |
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| 1227 | * @param string $service_name 'facebook', 'twitter', etc |
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| 1228 | * @param object|array The Connection object (WordPress.com) or array (Jetpack) |
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| 1229 | * @return bool |
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| 1230 | */ |
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| 1231 | function publicize_checkbox_default( $checked, $post_id, $service_name, $connection ) { |
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| 1238 | |||
| 1239 | /* |
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| 1240 | * Util |
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| 1241 | */ |
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| 1242 | |||
| 1243 | /** |
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| 1244 | * Converts a Publicize message template string into a sprintf format string |
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| 1245 | * |
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| 1246 | * @param string[] $args |
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| 1247 | * 0 - The Publicize message template: 'Check out my post: %title% @ %url' |
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| 1248 | * ... - The template tags 'title', 'url', etc. |
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| 1249 | * @return string |
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| 1250 | */ |
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| 1251 | protected static function build_sprintf( $args ) { |
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| 1264 | } |
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| 1265 | |||
| 1269 |
In PHP, under loose comparison (like
==, or!=, orswitchconditions), values of different types might be equal.For
integervalues, zero is a special case, in particular the following results might be unexpected: