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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| 3 | abstract class Publicize_Base { |
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| 4 | |||
| 5 | /** |
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| 6 | * Services that are currently connected to the given user |
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| 7 | * through publicize. |
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| 8 | */ |
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| 9 | public $connected_services = array(); |
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| 10 | |||
| 11 | /** |
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| 12 | * Services that are supported by publicize. They don't |
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| 13 | * necessarily need to be connected to the current user. |
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| 14 | */ |
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| 15 | public $services; |
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| 16 | |||
| 17 | /** |
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| 18 | * key names for post meta |
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| 19 | */ |
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| 20 | public $ADMIN_PAGE = 'wpas'; |
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| 21 | public $POST_MESS = '_wpas_mess'; |
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| 22 | public $POST_SKIP = '_wpas_skip_'; // connection id appended to indicate that a connection should NOT be publicized to |
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| 23 | public $POST_DONE = '_wpas_done_'; // connection id appended to indicate a connection has already been publicized to |
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| 24 | public $USER_AUTH = 'wpas_authorize'; |
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| 25 | public $USER_OPT = 'wpas_'; |
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| 26 | public $PENDING = '_publicize_pending'; // ready for Publicize to do its thing |
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| 27 | public $POST_SERVICE_DONE = '_publicize_done_external'; // array of external ids where we've Publicized |
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| 28 | |||
| 29 | /** |
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| 30 | * default pieces of the message used in constructing the |
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| 31 | * content pushed out to other social networks |
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| 32 | */ |
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| 33 | |||
| 34 | public $default_prefix = ''; |
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| 35 | public $default_message = '%title%'; |
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| 36 | public $default_suffix = ' '; |
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| 37 | |||
| 38 | /** |
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| 39 | * What WP capability is require to create/delete global connections? |
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| 40 | * All users with this cap can un-globalize all other global connections, and globalize any of their own |
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| 41 | * Globalized connections cannot be unselected by users without this capability when publishing |
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| 42 | */ |
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| 43 | public $GLOBAL_CAP = 'edit_others_posts'; |
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| 44 | |||
| 45 | /** |
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| 46 | * Sets up the basics of Publicize |
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| 47 | */ |
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| 48 | function __construct() { |
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| 123 | |||
| 124 | /* |
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| 125 | * Services: Facebook, Twitter, etc. |
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| 126 | */ |
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| 127 | |||
| 128 | /** |
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| 129 | * Get services for the given blog and user. |
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| 130 | * |
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| 131 | * Can return all available services or just the ones with an active connection. |
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| 132 | * |
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| 133 | * @param string $filter |
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| 134 | * 'all' (default) - Get all services available for connecting |
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| 135 | * 'connected' - Get all services currently connected |
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| 136 | * @param false|int $_blog_id The blog ID. Use false (default) for the current blog |
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| 137 | * @param false|int $_user_id The user ID. Use false (default) for the current user |
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| 138 | * @return array |
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| 139 | */ |
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| 140 | abstract function get_services( $filter = 'all', $_blog_id = false, $_user_id = false ); |
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| 141 | |||
| 142 | /** |
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| 143 | * Does the given user have a connection to the service on the given blog? |
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| 144 | * |
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| 145 | * @param string $service_name 'facebook', 'twitter', etc. |
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| 146 | * @param false|int $_blog_id The blog ID. Use false (default) for the current blog |
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| 147 | * @param false|int $_user_id The user ID. Use false (default) for the current user |
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| 148 | * @return bool |
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| 149 | */ |
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| 150 | function is_enabled( $service_name, $_blog_id = false, $_user_id = false ) { |
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| 160 | |||
| 161 | /** |
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| 162 | * Generates a connection URL. |
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| 163 | * |
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| 164 | * This is the URL, which, when visited by the user, starts the authentication |
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| 165 | * process required to forge a connection. |
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| 166 | * |
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| 167 | * @param string $service_name 'facebook', 'twitter', etc. |
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| 168 | * @return string |
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| 169 | */ |
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| 170 | abstract function connect_url( $service_name ); |
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| 171 | |||
| 172 | /** |
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| 173 | * Generates a Connection refresh URL. |
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| 174 | * |
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| 175 | * This is the URL, which, when visited by the user, re-authenticates their |
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| 176 | * connection to the service. |
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| 177 | * |
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| 178 | * @param string $service_name 'facebook', 'twitter', etc. |
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| 179 | * @return string |
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| 180 | */ |
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| 181 | abstract function refresh_url( $service_name ); |
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| 182 | |||
| 183 | /** |
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| 184 | * Generates a disconnection URL. |
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| 185 | * |
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| 186 | * This is the URL, which, when visited by the user, breaks their connection |
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| 187 | * with the service. |
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| 188 | * |
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| 189 | * @param string $service_name 'facebook', 'twitter', etc. |
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| 190 | * @param string $connection_id Connection ID |
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| 191 | * @return string |
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| 192 | */ |
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| 193 | abstract function disconnect_url( $service_name, $connection_id ); |
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| 194 | |||
| 195 | /** |
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| 196 | * Returns a display name for the Service |
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| 197 | * |
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| 198 | * @param string $service_name 'facebook', 'twitter', etc. |
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| 199 | * @return string |
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| 200 | */ |
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| 201 | public static function get_service_label( $service_name ) { |
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| 217 | |||
| 218 | /* |
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| 219 | * Connections: For each Service, there can be multiple connections |
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| 220 | * for a given user. For example, one user could be connected to Twitter |
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| 221 | * as both @jetpack and as @wordpressdotcom |
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| 222 | * |
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| 223 | * For historical reasons, Connections are represented as an object |
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| 224 | * on WordPress.com and as an array in Jetpack. |
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| 225 | */ |
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| 226 | |||
| 227 | /** |
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| 228 | * Get the active Connections of a Service |
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| 229 | * |
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| 230 | * @param string $service_name 'facebook', 'twitter', etc. |
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| 231 | * @param false|int $_blog_id The blog ID. Use false (default) for the current blog |
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| 232 | * @param false|int $_user_id The user ID. Use false (default) for the current user |
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| 233 | * @return false|object[]|array[] false if no connections exist |
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| 234 | */ |
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| 235 | abstract function get_connections( $service_name, $_blog_id = false, $_user_id = false ); |
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| 236 | |||
| 237 | /** |
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| 238 | * Get a single Connection of a Service |
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| 239 | * |
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| 240 | * @param string $service_name 'facebook', 'twitter', etc. |
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| 241 | * @param string $connection_id Connection ID |
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| 242 | * @param false|int $_blog_id The blog ID. Use false (default) for the current blog |
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| 243 | * @param false|int $_user_id The user ID. Use false (default) for the current user |
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| 244 | * @return false|object[]|array[] false if no connections exist |
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| 245 | */ |
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| 246 | abstract function get_connection( $service_name, $connection_id, $_blog_id = false, $_user_id = false ); |
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| 247 | |||
| 248 | /** |
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| 249 | * Get the Connection ID. |
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| 250 | * |
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| 251 | * Note that this is different than the Connection's uniqueid. |
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| 252 | * |
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| 253 | * Via a quirk of history, ID is globally unique and unique_id |
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| 254 | * is only unique per site. |
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| 255 | * |
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| 256 | * @param object|array The Connection object (WordPress.com) or array (Jetpack) |
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| 257 | * @return string |
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| 258 | */ |
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| 259 | abstract function get_connection_id( $connection ); |
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| 260 | |||
| 261 | /** |
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| 262 | * Get the Connection unique_id |
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| 263 | * |
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| 264 | * Note that this is different than the Connections ID. |
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| 265 | * |
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| 266 | * Via a quirk of history, ID is globally unique and unique_id |
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| 267 | * is only unique per site. |
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| 268 | * |
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| 269 | * @param object|array The Connection object (WordPress.com) or array (Jetpack) |
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| 270 | * @return string |
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| 271 | */ |
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| 272 | abstract function get_connection_unique_id( $connection ); |
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| 273 | |||
| 274 | /** |
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| 275 | * Get the Connection's Meta data |
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| 276 | * |
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| 277 | * @param object|array Connection |
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| 278 | * @return array Connection Meta |
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| 279 | */ |
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| 280 | abstract function get_connection_meta( $connection ); |
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| 281 | |||
| 282 | /** |
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| 283 | * Disconnect a Connection |
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| 284 | * |
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| 285 | * @param string $service_name 'facebook', 'twitter', etc. |
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| 286 | * @param string $connection_id Connection ID |
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| 287 | * @param false|int $_blog_id The blog ID. Use false (default) for the current blog |
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| 288 | * @param false|int $_user_id The user ID. Use false (default) for the current user |
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| 289 | * @param bool $force_delete Whether to skip permissions checks |
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| 290 | * @return false|void False on failure. Void on success. |
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| 291 | */ |
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| 292 | abstract function disconnect( $service_name, $connection_id, $_blog_id = false, $_user_id = false, $force_delete = false ); |
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| 293 | |||
| 294 | /** |
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| 295 | * Globalizes a Connection |
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| 296 | * |
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| 297 | * @param string $connection_id Connection ID |
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| 298 | * @return bool Falsey on failure. Truthy on success. |
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| 299 | */ |
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| 300 | abstract function globalize_connection( $connection_id ); |
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| 301 | |||
| 302 | /** |
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| 303 | * Unglobalizes a Connection |
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| 304 | * |
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| 305 | * @param string $connection_id Connection ID |
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| 306 | * @return bool Falsey on failure. Truthy on success. |
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| 307 | */ |
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| 308 | abstract function unglobalize_connection( $connection_id ); |
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| 309 | |||
| 310 | /** |
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| 311 | * Returns an external URL to the Connection's profile |
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| 312 | * |
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| 313 | * @param string $service_name 'facebook', 'twitter', etc. |
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| 314 | * @param object|array The Connection object (WordPress.com) or array (Jetpack) |
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| 315 | * @return false|string False on failure. URL on success. |
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| 316 | */ |
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| 317 | function get_profile_link( $service_name, $connection ) { |
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| 357 | |||
| 358 | /** |
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| 359 | * Returns a display name for the Connection |
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| 360 | * |
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| 361 | * @param string $service_name 'facebook', 'twitter', etc. |
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| 362 | * @param object|array The Connection object (WordPress.com) or array (Jetpack) |
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| 363 | * @return string |
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| 364 | */ |
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| 365 | function get_display_name( $service_name, $connection ) { |
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| 381 | |||
| 382 | /** |
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| 383 | * Whether the user needs to select additional options after connecting |
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| 384 | * |
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| 385 | * @param string $service_name 'facebook', 'twitter', etc. |
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| 386 | * @param object|array The Connection object (WordPress.com) or array (Jetpack) |
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| 387 | * @return bool |
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| 388 | */ |
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| 389 | function show_options_popup( $service_name, $connection ) { |
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| 412 | |||
| 413 | /** |
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| 414 | * Whether the Connection is "valid" wrt Facebook's requirements. |
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| 415 | * |
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| 416 | * Must be connected to a Page (not a Profile). |
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| 417 | * (Also returns true if we're in the middle of the connection process) |
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| 418 | * |
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| 419 | * @param object|array The Connection object (WordPress.com) or array (Jetpack) |
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| 420 | * @return bool |
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| 421 | */ |
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| 422 | function is_valid_facebook_connection( $connection ) { |
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| 430 | |||
| 431 | /** |
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| 432 | * Whether the Connection currently being connected |
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| 433 | * |
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| 434 | * @param object|array The Connection object (WordPress.com) or array (Jetpack) |
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| 435 | * @return bool |
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| 436 | */ |
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| 437 | function is_connecting_connection( $connection ) { |
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| 442 | |||
| 443 | /** |
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| 444 | * AJAX Handler to run connection tests on all Connections |
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| 445 | * @return void |
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| 446 | */ |
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| 447 | function test_publicize_conns() { |
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| 450 | |||
| 451 | /** |
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| 452 | * Run connection tests on all Connections |
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| 453 | * |
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| 454 | * @return array { |
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| 455 | * Array of connection test results. |
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| 456 | * |
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| 457 | * @type string 'connectionID' Connection identifier string that is unique for each connection |
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| 458 | * @type string 'serviceName' Slug of the connection's service (facebook, twitter, ...) |
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| 459 | * @type bool 'connectionTestPassed' Whether the connection test was successful |
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| 460 | * @type string 'connectionTestMessage' Test success or error message |
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| 461 | * @type bool 'userCanRefresh' Whether the user can re-authenticate their connection to the service |
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| 462 | * @type string 'refreshText' Message instructing user to re-authenticate their connection to the service |
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| 463 | * @type string 'refreshURL' URL, which, when visited by the user, re-authenticates their connection to the service. |
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| 464 | * @type string 'unique_id' ID string representing connection |
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| 465 | * } |
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| 466 | */ |
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| 467 | function get_publicize_conns_test_results() { |
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| 526 | |||
| 527 | /** |
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| 528 | * Run the connection test for the Connection |
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| 529 | * |
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| 530 | * @param string $service_name 'facebook', 'twitter', etc. |
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| 531 | * @param object|array The Connection object (WordPress.com) or array (Jetpack) |
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| 532 | * @return WP_Error|true WP_Error on failure. True on success |
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| 533 | */ |
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| 534 | abstract function test_connection( $service_name, $connection ); |
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| 535 | |||
| 536 | /** |
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| 537 | * Retrieves current list of connections and applies filters. |
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| 538 | * |
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| 539 | * Retrieves current available connections and checks if the connections |
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| 540 | * have already been used to share current post. Finally, the checkbox |
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| 541 | * form UI fields are calculated. This function exposes connection form |
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| 542 | * data directly as array so it can be retrieved for static HTML generation |
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| 543 | * or JSON consumption. |
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| 544 | * |
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| 545 | * @since 6.7.0 |
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| 546 | * |
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| 547 | * @param integer $selected_post_id Optional. Post ID to query connection status for. |
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| 548 | * |
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| 549 | * @return array { |
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| 550 | * Array of UI setup data for connection list form. |
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| 551 | * |
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| 552 | * @type string 'unique_id' ID string representing connection |
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| 553 | * @type string 'service_name' Slug of the connection's service (facebook, twitter, ...) |
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| 554 | * @type string 'service_label' Service Label (Facebook, Twitter, ...) |
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| 555 | * @type string 'display_name' Connection's human-readable Username: "@jetpack" |
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| 556 | * @type bool 'enabled' Default value for the connection (e.g., for a checkbox). |
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| 557 | * @type bool 'done' Has this connection already been publicized to? |
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| 558 | * @type bool 'toggleable' Is the user allowed to change the value for the connection? |
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| 559 | * @type bool 'global' Is this connection a global one? |
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| 560 | * } |
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| 561 | */ |
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| 562 | public function get_filtered_connection_data( $selected_post_id = null ) { |
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| 697 | |||
| 698 | /** |
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| 699 | * Checks if post has already been shared by Publicize in the past. |
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| 700 | * |
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| 701 | * @since 6.7.0 |
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| 702 | * |
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| 703 | * @param integer $post_id Optional. Post ID to query connection status for: will use current post if missing. |
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| 704 | * |
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| 705 | * @return bool True if post has already been shared by Publicize, false otherwise. |
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| 706 | */ |
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| 707 | abstract public function post_is_done_sharing( $post_id = null ); |
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| 708 | |||
| 709 | /** |
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| 710 | * Retrieves full list of available Publicize connection services. |
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| 711 | * |
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| 712 | * Retrieves current available publicize service connections |
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| 713 | * with associated labels and URLs. |
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| 714 | * |
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| 715 | * @since 6.7.0 |
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| 716 | * |
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| 717 | * @return array { |
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| 718 | * Array of UI service connection data for all services |
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| 719 | * |
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| 720 | * @type string 'name' Name of service. |
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| 721 | * @type string 'label' Display label for service. |
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| 722 | * @type string 'url' URL for adding connection to service. |
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| 723 | * } |
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| 724 | */ |
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| 725 | function get_available_service_data() { |
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| 739 | |||
| 740 | /* |
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| 741 | * Site Data |
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| 742 | */ |
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| 743 | |||
| 744 | function user_id() { |
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| 747 | |||
| 748 | function blog_id() { |
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| 751 | |||
| 752 | /* |
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| 753 | * Posts |
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| 754 | */ |
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| 755 | |||
| 756 | /** |
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| 757 | * Checks old and new status to see if the post should be flagged as |
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| 758 | * ready to Publicize. |
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| 759 | * |
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| 760 | * Attached to the `transition_post_status` filter. |
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| 761 | * |
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| 762 | * @param string $new_status |
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| 763 | * @param string $old_status |
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| 764 | * @param WP_Post $post |
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| 765 | * @return void |
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| 766 | */ |
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| 767 | abstract function flag_post_for_publicize( $new_status, $old_status, $post ); |
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| 768 | |||
| 769 | /** |
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| 770 | * Ensures the Post internal post-type supports `publicize` |
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| 771 | * |
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| 772 | * This feature support flag is used by the REST API. |
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| 773 | */ |
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| 774 | function add_post_type_support() { |
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| 777 | |||
| 778 | /** |
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| 779 | * Can the current user access Publicize Data. |
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| 780 | * |
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| 781 | * @param int $post_id. 0 for general access. Post_ID for specific access. |
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| 782 | * @return bool |
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| 783 | */ |
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| 784 | function current_user_can_access_publicize_data( $post_id = 0 ) { |
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| 802 | |||
| 803 | /** |
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| 804 | * Auth callback for the protected ->POST_MESS post_meta |
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| 805 | * |
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| 806 | * @param bool $allowed |
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| 807 | * @param string $meta_key |
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| 808 | * @param int $object_id Post ID |
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| 809 | * @return bool |
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| 810 | */ |
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| 811 | function message_meta_auth_callback( $allowed, $meta_key, $object_id ) { |
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| 814 | |||
| 815 | /** |
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| 816 | * Registers the ->POST_MESS post_meta for use in the REST API. |
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| 817 | * |
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| 818 | * Registers for each post type that with `publicize` feature support. |
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| 819 | */ |
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| 820 | function register_post_meta() { |
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| 842 | |||
| 843 | /** |
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| 844 | * Fires when a post is saved, checks conditions and saves state in postmeta so that it |
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| 845 | * can be picked up later by @see ::publicize_post() on WordPress.com codebase. |
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| 846 | * |
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| 847 | * Attached to the `save_post` action. |
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| 848 | * |
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| 849 | * @param int $post_id |
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| 850 | * @param WP_Post $post |
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| 851 | * @return void |
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| 852 | */ |
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| 853 | function save_meta( $post_id, $post ) { |
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| 1008 | |||
| 1009 | /** |
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| 1010 | * Alters the "Post Published" message to include information about where the post |
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| 1011 | * was Publicized to. |
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| 1012 | * |
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| 1013 | * Attached to the `post_updated_messages` filter |
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| 1014 | * |
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| 1015 | * @param string[] $messages |
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| 1016 | * @return string[] |
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| 1017 | */ |
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| 1018 | public function update_published_message( $messages ) { |
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| 1078 | |||
| 1079 | /** |
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| 1080 | * Get the Connections the Post was just Publicized to. |
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| 1081 | * |
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| 1082 | * Only reliable just after the Post was published. |
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| 1083 | * |
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| 1084 | * @param int $post_id |
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| 1085 | * @return string[] Array of Service display name => Connection display name |
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| 1086 | */ |
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| 1087 | function get_publicizing_services( $post_id ) { |
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| 1109 | |||
| 1110 | /** |
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| 1111 | * Is the post Publicize-able? |
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| 1112 | * |
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| 1113 | * Only valid prior to Publicizing a Post. |
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| 1114 | * |
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| 1115 | * @param WP_Post $post |
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| 1116 | * @return bool |
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| 1117 | */ |
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| 1118 | function post_is_publicizeable( $post ) { |
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| 1133 | |||
| 1134 | /** |
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| 1135 | * Is a given post type Publicize-able? |
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| 1136 | * |
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| 1137 | * Not every CPT lends itself to Publicize-ation. Allow CPTs to register by adding their CPT via |
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| 1138 | * the publicize_post_types array filter. |
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| 1139 | * |
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| 1140 | * @param string $post_type The post type to check. |
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| 1141 | * @return bool True if the post type can be Publicized. |
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| 1142 | */ |
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| 1143 | function post_type_is_publicizeable( $post_type ) { |
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| 1149 | |||
| 1150 | /** |
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| 1151 | * Already-published posts should not be Publicized by default. This filter sets checked to |
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| 1152 | * false if a post has already been published. |
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| 1153 | * |
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| 1154 | * Attached to the `publicize_checkbox_default` filter |
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| 1155 | * |
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| 1156 | * @param bool $checked |
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| 1157 | * @param int $post_id |
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| 1158 | * @param string $service_name 'facebook', 'twitter', etc |
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| 1159 | * @param object|array The Connection object (WordPress.com) or array (Jetpack) |
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| 1160 | * @return bool |
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| 1161 | */ |
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| 1162 | function publicize_checkbox_default( $checked, $post_id, $service_name, $connection ) { |
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| 1169 | |||
| 1170 | /* |
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| 1171 | * Util |
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| 1172 | */ |
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| 1173 | |||
| 1174 | /** |
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| 1175 | * Converts a Publicize message template string into a sprintf format string |
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| 1176 | * |
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| 1177 | * @param string[] $args |
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| 1178 | * 0 - The Publicize message template: 'Check out my post: %title% @ %url' |
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| 1179 | * ... - The template tags 'title', 'url', etc. |
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| 1180 | * @return string |
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| 1181 | */ |
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| 1182 | protected static function build_sprintf( $args ) { |
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| 1195 | } |
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| 1196 | |||
| 1211 |
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: