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| 1 | <?php |
| 2 | /** |
| 3 | * A single place for hosts to force, default, or hide Jetpack features. |
| 4 | * |
| 5 | * @package automattic/jetpack-status |
| 6 | */ |
| 7 | |
| 8 | namespace Automattic\Jetpack; |
| 9 | |
| 10 | /** |
| 11 | * Reads `jetpack_feature_policy` and feeds it into the filters that already own each decision. |
| 12 | * |
| 13 | * Activation goes through `jetpack_active_modules`, defaults through `jetpack_get_default_modules`, |
| 14 | * and visibility through both `jetpack_my_jetpack_feature_visibility` and |
| 15 | * `jetpack_admin_menu_visibility`, so every existing reader, including forced-module detection, |
| 16 | * sees the policy without knowing it exists. |
| 17 | */ |
| 18 | class Feature_Policy { |
| 19 | |
| 20 | /** |
| 21 | * The policy filter's name. |
| 22 | * |
| 23 | * @var string |
| 24 | */ |
| 25 | const FILTER = 'jetpack_feature_policy'; |
| 26 | |
| 27 | const ACTIVATION_DEFAULT = 'default'; |
| 28 | const ACTIVATION_FORCED_ON = 'forced-on'; |
| 29 | const ACTIVATION_FORCED_OFF = 'forced-off'; |
| 30 | const ACTIVATION_DEFAULT_ON = 'default-on'; |
| 31 | const ACTIVATION_DEFAULT_OFF = 'default-off'; |
| 32 | |
| 33 | const VISIBILITY_VISIBLE = 'visible'; |
| 34 | const VISIBILITY_HIDDEN = 'hidden'; |
| 35 | |
| 36 | /** |
| 37 | * Runs after other callbacks so the policy has the last word. |
| 38 | * |
| 39 | * @var int |
| 40 | */ |
| 41 | const PRIORITY = PHP_INT_MAX; |
| 42 | |
| 43 | /** |
| 44 | * Bridged filters, mapped to the callback and argument count each takes. |
| 45 | * |
| 46 | * @var array |
| 47 | */ |
| 48 | const BRIDGES = array( |
| 49 | 'jetpack_active_modules' => array( 'filter_active_modules', 1 ), |
| 50 | 'jetpack_get_default_modules' => array( 'filter_default_modules', 5 ), |
| 51 | 'jetpack_my_jetpack_feature_visibility' => array( 'filter_visibility', 1 ), |
| 52 | 'jetpack_admin_menu_visibility' => array( 'filter_menu_visibility', 2 ), |
| 53 | ); |
| 54 | |
| 55 | /** |
| 56 | * Forced-on slugs already reported through `_doing_it_wrong()` this request. |
| 57 | * |
| 58 | * @var string[] |
| 59 | */ |
| 60 | private static $warned = array(); |
| 61 | |
| 62 | /** |
| 63 | * Registers the bridge callbacks once something uses the policy filter. |
| 64 | * |
| 65 | * Called by each reader rather than at load, because the status package has no bootstrap. |
| 66 | * Waiting for a policy keeps `has_filter( 'jetpack_active_modules' )` false on sites without one. |
| 67 | * |
| 68 | * @return void |
| 69 | */ |
| 70 | public static function ensure_hooks() { |
| 71 | if ( ! has_filter( self::FILTER ) ) { |
| 72 | return; |
| 73 | } |
| 74 | |
| 75 | foreach ( self::BRIDGES as $hook => list( $method, $accepted_args ) ) { |
| 76 | if ( false === has_filter( $hook, array( __CLASS__, $method ) ) ) { |
| 77 | add_filter( $hook, array( __CLASS__, $method ), self::PRIORITY, $accepted_args ); |
| 78 | } |
| 79 | } |
| 80 | } |
| 81 | |
| 82 | /** |
| 83 | * Removes the bridge callbacks. For tests. |
| 84 | * |
| 85 | * @return void |
| 86 | */ |
| 87 | public static function reset() { |
| 88 | foreach ( self::BRIDGES as $hook => list( $method ) ) { |
| 89 | remove_filter( $hook, array( __CLASS__, $method ), self::PRIORITY ); |
| 90 | } |
| 91 | |
| 92 | self::$warned = array(); |
| 93 | } |
| 94 | |
| 95 | /** |
| 96 | * The validated policy. |
| 97 | * |
| 98 | * @return array Map of slug to an array with `activation` and `visibility`, either of which may be null. |
| 99 | */ |
| 100 | public static function get_policy() { |
| 101 | /** |
| 102 | * Filters how Jetpack treats each feature on this site. |
| 103 | * |
| 104 | * Keys are module slugs for `activation`. For `visibility`, keys are anything the My Jetpack |
| 105 | * Features page answers to: product, module, or feature slugs. Each value is an array with |
| 106 | * either or both of: |
| 107 | * |
| 108 | * - `activation`: 'forced-on' or 'forced-off' pin the module on every request, the same as |
| 109 | * `jetpack_active_modules`. 'default-on' or 'default-off' change what Jetpack turns on when |
| 110 | * it activates its default modules, which happens at connection and upgrade, not on an |
| 111 | * existing site. 'default' leaves it alone. A 'forced-on' slug this site has no module for |
| 112 | * still reads as active, but calls `_doing_it_wrong()` since nothing will load it. |
| 113 | * - `visibility`: 'hidden' keeps the item off the My Jetpack Features page and out of the |
| 114 | * wp-admin sidebar, 'visible' shows it in both. A sidebar entry matches on its item key or |
| 115 | * on the product or module gate it declares. The policy runs last, so 'visible' overrides a |
| 116 | * 'hidden' another callback set. |
| 117 | * |
| 118 | * Standalone plugin products (Akismet, Boost, CRM, Protect) take `visibility` only: WordPress |
| 119 | * decides which plugins load before Jetpack runs, so forcing one needs `option_active_plugins` |
| 120 | * in an mu-plugin. |
| 121 | * |
| 122 | * Register the policy before `after_setup_theme`, from an mu-plugin, plugin, or theme: |
| 123 | * `Jetpack::load_modules()` runs there at priority -2, so a later policy (on `init`, say) misses |
| 124 | * module loading while My Jetpack still honors it — the module runs on a page saying it is off. |
| 125 | * |
| 126 | * @since 7.1.0 |
| 127 | * |
| 128 | * @param array $policy Map of slug to policy, empty until a host adds to it. |
| 129 | */ |
| 130 | $policy = apply_filters( 'jetpack_feature_policy', array() ); |
| 131 | |
| 132 | if ( ! is_array( $policy ) ) { |
| 133 | return array(); |
| 134 | } |
| 135 | |
| 136 | $activations = array( self::ACTIVATION_DEFAULT, self::ACTIVATION_FORCED_ON, self::ACTIVATION_FORCED_OFF, self::ACTIVATION_DEFAULT_ON, self::ACTIVATION_DEFAULT_OFF ); |
| 137 | $visibilities = array( self::VISIBILITY_VISIBLE, self::VISIBILITY_HIDDEN ); |
| 138 | $valid = array(); |
| 139 | |
| 140 | foreach ( $policy as $slug => $entry ) { |
| 141 | if ( ! is_string( $slug ) || '' === $slug || ! is_array( $entry ) ) { |
| 142 | continue; |
| 143 | } |
| 144 | |
| 145 | $activation = $entry['activation'] ?? null; |
| 146 | $visibility = $entry['visibility'] ?? null; |
| 147 | |
| 148 | $valid[ $slug ] = array( |
| 149 | 'activation' => in_array( $activation, $activations, true ) ? $activation : null, |
| 150 | 'visibility' => in_array( $visibility, $visibilities, true ) ? $visibility : null, |
| 151 | ); |
| 152 | } |
| 153 | |
| 154 | return $valid; |
| 155 | } |
| 156 | |
| 157 | /** |
| 158 | * Adds forced-on modules to the active list and drops forced-off ones. |
| 159 | * |
| 160 | * @param array $active Active module slugs. |
| 161 | * @return array |
| 162 | */ |
| 163 | public static function filter_active_modules( $active ) { |
| 164 | if ( ! is_array( $active ) ) { |
| 165 | return $active; |
| 166 | } |
| 167 | |
| 168 | $policy = self::get_policy(); |
| 169 | $forced_on = self::get_slugs( $policy, 'activation', self::ACTIVATION_FORCED_ON ); |
| 170 | |
| 171 | self::warn_about_slugs_with_no_module( $forced_on ); |
| 172 | |
| 173 | $active = array_merge( $active, $forced_on ); |
| 174 | |
| 175 | return array_values( array_unique( array_diff( $active, self::get_slugs( $policy, 'activation', self::ACTIVATION_FORCED_OFF ) ) ) ); |
| 176 | } |
| 177 | |
| 178 | /** |
| 179 | * Reports a forced-on slug this site has no module for. |
| 180 | * |
| 181 | * The slug is kept, because discarding a host's instruction silently is worse than honoring a |
| 182 | * typo, so it reads as active everywhere while `load_modules()` never loads it. |
| 183 | * |
| 184 | * @param string[] $forced_on Slugs the policy forces on. |
| 185 | * @return void |
| 186 | */ |
| 187 | private static function warn_about_slugs_with_no_module( $forced_on ) { |
| 188 | $unwarned = array_diff( $forced_on, self::$warned ); |
| 189 | |
| 190 | // This runs on every get_active() call, so skip the module scan unless there is news. |
| 191 | if ( ! $unwarned || ! function_exists( '_doing_it_wrong' ) ) { |
| 192 | return; |
| 193 | } |
| 194 | |
| 195 | // No arguments: every slug this site has, so only a typo is flagged. |
| 196 | $available = ( new Modules() )->get_available(); |
| 197 | self::$warned = array_merge( self::$warned, $unwarned ); |
| 198 | |
| 199 | foreach ( $unwarned as $slug ) { |
| 200 | if ( in_array( $slug, $available, true ) ) { |
| 201 | continue; |
| 202 | } |
| 203 | |
| 204 | $message = sprintf( 'Forced on "%s", which is not a Jetpack module on this site. It will report as active, but nothing will load it.', $slug ); |
| 205 | |
| 206 | // The version token is only replaced at release time when this call is on one line. |
| 207 | _doing_it_wrong( 'jetpack_feature_policy', esc_html( $message ), '7.1.0' ); |
| 208 | } |
| 209 | } |
| 210 | |
| 211 | /** |
| 212 | * Adds default-on modules to the defaults and drops default-off and forced-off ones. |
| 213 | * |
| 214 | * Forced-off has to go too: the activation path writes whatever it activates to |
| 215 | * `jetpack_active_modules`, so a forced-off default would be saved as active. |
| 216 | * |
| 217 | * @param array $modules Default module slugs. |
| 218 | * @param bool|string $min_version Minimum module version, passed through from the caller. |
| 219 | * @param bool|string $max_version Maximum module version, passed through from the caller. |
| 220 | * @param bool|null $requires_connection Connection requirement, passed through from the caller. |
| 221 | * @param bool|null $requires_user_connection User connection requirement, passed through from the caller. |
| 222 | * @return array |
| 223 | */ |
| 224 | public static function filter_default_modules( $modules, $min_version = false, $max_version = false, $requires_connection = null, $requires_user_connection = null ) { |
| 225 | if ( ! is_array( $modules ) ) { |
| 226 | return $modules; |
| 227 | } |
| 228 | |
| 229 | $policy = self::get_policy(); |
| 230 | $default_on = self::get_slugs( $policy, 'activation', self::ACTIVATION_DEFAULT_ON ); |
| 231 | |
| 232 | if ( $default_on ) { |
| 233 | // Honor the caller's constraints: an offline activation must not pick up a module that needs a connection. |
| 234 | $available = ( new Modules() )->get_available( $min_version, $max_version, $requires_connection, $requires_user_connection ); |
| 235 | $modules = array_merge( $modules, array_intersect( $default_on, $available ) ); |
| 236 | } |
| 237 | |
| 238 | return array_values( array_unique( array_diff( $modules, self::get_slugs( $policy, 'activation', self::ACTIVATION_DEFAULT_OFF ), self::get_slugs( $policy, 'activation', self::ACTIVATION_FORCED_OFF ) ) ) ); |
| 239 | } |
| 240 | |
| 241 | /** |
| 242 | * Sets each slug's My Jetpack visibility from the policy. |
| 243 | * |
| 244 | * @param array $states Map of slug to visibility state. |
| 245 | * @return array |
| 246 | */ |
| 247 | public static function filter_visibility( $states ) { |
| 248 | if ( ! is_array( $states ) ) { |
| 249 | $states = array(); |
| 250 | } |
| 251 | |
| 252 | foreach ( self::get_policy() as $slug => $entry ) { |
| 253 | if ( null !== $entry['visibility'] ) { |
| 254 | $states[ $slug ] = $entry['visibility']; |
| 255 | } |
| 256 | } |
| 257 | |
| 258 | return $states; |
| 259 | } |
| 260 | |
| 261 | /** |
| 262 | * Sets each wp-admin sidebar item's state from the policy entry that names it. |
| 263 | * |
| 264 | * Hosts name features, not menu slugs, so an item is matched by its key and then by the |
| 265 | * product or module gate it declared. A policy slug matching no item changes nothing. |
| 266 | * |
| 267 | * @param array $states Map of menu item key to visibility state. |
| 268 | * @param array $items The registered menu items. |
| 269 | * @return array |
| 270 | */ |
| 271 | public static function filter_menu_visibility( $states, $items = array() ) { |
| 272 | if ( ! is_array( $states ) || ! is_array( $items ) ) { |
| 273 | return $states; |
| 274 | } |
| 275 | |
| 276 | $policy = self::get_policy(); |
| 277 | |
| 278 | foreach ( $items as $item ) { |
| 279 | if ( ! is_array( $item ) ) { |
| 280 | continue; |
| 281 | } |
| 282 | |
| 283 | $args = isset( $item['args'] ) && is_array( $item['args'] ) ? $item['args'] : array(); |
| 284 | $key = empty( $args['key'] ) ? ( $item['menu_slug'] ?? null ) : $args['key']; |
| 285 | |
| 286 | if ( ! is_string( $key ) || '' === $key ) { |
| 287 | continue; |
| 288 | } |
| 289 | |
| 290 | foreach ( array( $key, $args['product'] ?? null, $args['module'] ?? null ) as $slug ) { |
| 291 | if ( is_string( $slug ) && ! empty( $policy[ $slug ]['visibility'] ) ) { |
| 292 | $states[ $key ] = $policy[ $slug ]['visibility']; |
| 293 | break; |
| 294 | } |
| 295 | } |
| 296 | } |
| 297 | |
| 298 | return $states; |
| 299 | } |
| 300 | |
| 301 | /** |
| 302 | * Slugs whose policy sets `$key` to `$value`. |
| 303 | * |
| 304 | * @param array $policy The validated policy. |
| 305 | * @param string $key 'activation' or 'visibility'. |
| 306 | * @param string $value The value to match. |
| 307 | * @return string[] |
| 308 | */ |
| 309 | private static function get_slugs( $policy, $key, $value ) { |
| 310 | $slugs = array(); |
| 311 | |
| 312 | foreach ( $policy as $slug => $entry ) { |
| 313 | if ( $value === $entry[ $key ] ) { |
| 314 | $slugs[] = $slug; |
| 315 | } |
| 316 | } |
| 317 | |
| 318 | return $slugs; |
| 319 | } |
| 320 | } |