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| 1 | <?php |
| 2 | /** |
| 3 | * Holiday Snow |
| 4 | * Adds falling snow to a blog for a season. |
| 5 | * |
| 6 | * @since 6.1.0 |
| 7 | * |
| 8 | * @package automattic/jetpack-mu-wpcom |
| 9 | */ |
| 10 | |
| 11 | namespace Automattic\Jetpack\Jetpack_Mu_Wpcom; |
| 12 | |
| 13 | /** |
| 14 | * Holiday Snow (admin and frontend). |
| 15 | */ |
| 16 | class Holiday_Snow { |
| 17 | /** |
| 18 | * Option names. |
| 19 | */ |
| 20 | private const OPTION_ENABLED = 'jetpack_holiday_snow_enabled'; |
| 21 | private const OPTION_GRID_WIDTH = 'jetpack_holiday_snow_grid_width'; |
| 22 | private const OPTION_DENSITY = 'jetpack_holiday_snow_density'; |
| 23 | private const OPTION_SPEED = 'jetpack_holiday_snow_speed'; |
| 24 | |
| 25 | /** |
| 26 | * Settings config; defined in init(). |
| 27 | * |
| 28 | * @var array<string, array> |
| 29 | */ |
| 30 | private static $holiday_snow_config = array(); |
| 31 | |
| 32 | /** |
| 33 | * Cached value for snow enabled option. |
| 34 | * |
| 35 | * @var bool|null |
| 36 | */ |
| 37 | private static $is_snow_enabled_cache = null; |
| 38 | |
| 39 | /** |
| 40 | * Get a config array safely, ensuring config is initialized. |
| 41 | * |
| 42 | * @since 6.9.0 |
| 43 | * |
| 44 | * @param string $option_name The option name. |
| 45 | * @return array|null The config array or null if not initialized. |
| 46 | */ |
| 47 | private static function get_config( $option_name ) { |
| 48 | // Ensure config is initialized. |
| 49 | if ( empty( self::$holiday_snow_config ) ) { |
| 50 | return null; |
| 51 | } |
| 52 | |
| 53 | if ( ! isset( self::$holiday_snow_config[ $option_name ] ) ) { |
| 54 | return null; |
| 55 | } |
| 56 | |
| 57 | return self::$holiday_snow_config[ $option_name ]; |
| 58 | } |
| 59 | |
| 60 | /** |
| 61 | * Get the hemisphere setting, automatically detected from timezone. |
| 62 | * Attempts to detect hemisphere from the site's timezone location data. |
| 63 | * Falls back to Northern hemisphere if detection is not possible |
| 64 | * e.g., UTC or offset-based timezones). |
| 65 | * |
| 66 | * @since 6.9.0 |
| 67 | * |
| 68 | * @return string 'south' or 'north'. |
| 69 | */ |
| 70 | private static function get_hemisphere_setting() { |
| 71 | $hemisphere = 'north'; |
| 72 | $timezone = wp_timezone(); |
| 73 | |
| 74 | /* |
| 75 | * Get location data from the timezone object. |
| 76 | * This only works for named timezones (e.g., "Europe/Budapest"), not offsets. |
| 77 | */ |
| 78 | $location = $timezone->getLocation(); |
| 79 | |
| 80 | if ( $location && isset( $location['latitude'] ) ) { |
| 81 | $latitude = (float) $location['latitude']; |
| 82 | |
| 83 | /* |
| 84 | * Latitude > 0 = Northern hemisphere, < 0 = Southern hemisphere. |
| 85 | */ |
| 86 | if ( $latitude < 0 ) { |
| 87 | $hemisphere = 'south'; |
| 88 | } |
| 89 | } |
| 90 | |
| 91 | /** |
| 92 | * Filter the detected hemisphere setting. |
| 93 | * Allows overriding the automatic hemisphere detection from timezone. |
| 94 | * |
| 95 | * @since 6.9.0 |
| 96 | * |
| 97 | * @param string $hemisphere The detected hemisphere. Either 'north' or 'south'. |
| 98 | */ |
| 99 | $hemisphere = apply_filters( 'jetpack_holiday_snow_hemisphere', $hemisphere ); |
| 100 | |
| 101 | if ( ! in_array( $hemisphere, array( 'north', 'south' ), true ) ) { |
| 102 | $hemisphere = 'north'; |
| 103 | } |
| 104 | |
| 105 | return $hemisphere; |
| 106 | } |
| 107 | |
| 108 | /** |
| 109 | * Check if it is the holiday snow season, based on hemisphere and date. |
| 110 | * |
| 111 | * The hemisphere is automatically detected from the site's timezone. |
| 112 | * If detection is not possible, fallback to Northern hemisphere. |
| 113 | * Northern hemisphere: shows from 1 December through 6 January. |
| 114 | * Southern hemisphere: shows from 1 June through 6 July. |
| 115 | * |
| 116 | * @return bool |
| 117 | */ |
| 118 | public static function is_snow_season() { |
| 119 | $is_snow_season = false; |
| 120 | $today = time(); |
| 121 | |
| 122 | $hemisphere = self::get_hemisphere_setting(); |
| 123 | if ( 'south' === $hemisphere ) { |
| 124 | $first_snow_day = mktime( 0, 0, 0, 6, 1 ); |
| 125 | $last_snow_day = mktime( 0, 0, 0, 7, 7 ); |
| 126 | // Southern hemisphere: June 1 - July 7 (doesn't span year boundary, use AND) |
| 127 | if ( $today >= $first_snow_day && $today < $last_snow_day ) { |
| 128 | $is_snow_season = true; |
| 129 | } |
| 130 | } else { |
| 131 | $first_snow_day = mktime( 0, 0, 0, 12, 1 ); |
| 132 | $last_snow_day = mktime( 0, 0, 0, 1, 7 ); |
| 133 | // Northern hemisphere: Dec 1 - Jan 7 (spans year boundary, use OR) |
| 134 | if ( $today >= $first_snow_day || $today < $last_snow_day ) { |
| 135 | $is_snow_season = true; |
| 136 | } |
| 137 | } |
| 138 | |
| 139 | /** |
| 140 | * Filter to check if it is the snow season. |
| 141 | * It allows to change the start and end dates of the season, |
| 142 | * for regions where the holiday season may be different. |
| 143 | * |
| 144 | * @since 6.1.0 |
| 145 | * |
| 146 | * @param bool $is_holiday_snow_season Is it the snow season? |
| 147 | */ |
| 148 | return apply_filters( 'jetpack_is_holiday_snow_season', $is_snow_season ); |
| 149 | } |
| 150 | |
| 151 | /** |
| 152 | * Check if the snow is enabled. |
| 153 | * |
| 154 | * @return bool |
| 155 | */ |
| 156 | public static function is_snow_enabled() { |
| 157 | if ( null === self::$is_snow_enabled_cache ) { |
| 158 | self::$is_snow_enabled_cache = (bool) get_option( self::OPTION_ENABLED ); |
| 159 | } |
| 160 | return self::$is_snow_enabled_cache; |
| 161 | } |
| 162 | |
| 163 | /** |
| 164 | * Register the hooks. |
| 165 | * |
| 166 | * @return void |
| 167 | */ |
| 168 | public static function init() { |
| 169 | self::$holiday_snow_config = array( |
| 170 | self::OPTION_ENABLED => array( |
| 171 | 'default' => false, |
| 172 | 'type' => 'boolean', |
| 173 | 'description' => __( 'Show falling snow on my site.', 'jetpack-mu-wpcom' ), |
| 174 | 'label' => __( 'Enable Holiday Snow', 'jetpack-mu-wpcom' ), |
| 175 | ), |
| 176 | self::OPTION_GRID_WIDTH => array( |
| 177 | 'default' => 600, |
| 178 | 'min' => 100, |
| 179 | 'max' => 1000, |
| 180 | 'step' => 10, |
| 181 | 'type' => 'integer', |
| 182 | 'description' => __( 'How wide a grid of snow is.', 'jetpack-mu-wpcom' ), |
| 183 | 'label' => __( 'Snow Grid Width', 'jetpack-mu-wpcom' ), |
| 184 | 'hidden' => true, // Disabled for now, as it's used in a SCSS for loop |
| 185 | ), |
| 186 | self::OPTION_DENSITY => array( |
| 187 | 'default' => 10, |
| 188 | 'min' => 1, |
| 189 | 'max' => 30, |
| 190 | 'step' => 1, |
| 191 | 'type' => 'integer', |
| 192 | 'description' => __( 'How many snowflakes appear on the screen at a given time.', 'jetpack-mu-wpcom' ), |
| 193 | 'label' => __( 'Snow Density', 'jetpack-mu-wpcom' ), |
| 194 | 'hidden' => true, // Disabled for now, as it's used in a SCSS for loop |
| 195 | ), |
| 196 | self::OPTION_SPEED => array( |
| 197 | 'default' => 9, |
| 198 | 'min' => 1, |
| 199 | 'max' => 20, |
| 200 | 'step' => 1, |
| 201 | 'type' => 'integer', |
| 202 | 'description' => __( 'How long it takes for a snowflake to get to the bottom of the screen. The lower the number, the faster it goes.', 'jetpack-mu-wpcom' ), |
| 203 | 'label' => __( 'Snow Speed', 'jetpack-mu-wpcom' ), |
| 204 | ), |
| 205 | ); |
| 206 | |
| 207 | // Only show settings if it's snow season. |
| 208 | if ( ! self::is_snow_season() ) { |
| 209 | return; |
| 210 | } |
| 211 | |
| 212 | add_filter( 'site_settings_endpoint_get', array( __CLASS__, 'add_option_api' ) ); |
| 213 | add_filter( 'rest_api_update_site_settings', array( __CLASS__, 'update_option_api' ), 10, 2 ); |
| 214 | add_action( 'update_option_' . self::OPTION_ENABLED, array( __CLASS__, 'holiday_snow_option_updated' ) ); |
| 215 | add_action( 'admin_init', array( __CLASS__, 'register_settings' ) ); |
| 216 | |
| 217 | if ( self::is_snow_enabled() ) { |
| 218 | add_action( 'wp_footer', array( __CLASS__, 'holiday_snow_markup' ) ); |
| 219 | add_action( 'wp_enqueue_scripts', array( __CLASS__, 'holiday_snow_script' ) ); |
| 220 | } |
| 221 | } |
| 222 | |
| 223 | /** |
| 224 | * Add the snowstorm markup to the footer. |
| 225 | * |
| 226 | * @return void |
| 227 | * @since 6.1.0 |
| 228 | */ |
| 229 | public static function holiday_snow_markup() { |
| 230 | // Get the snow speed option, fallback to default if not set. |
| 231 | // Use hardcoded default (9) if config is not initialized yet. |
| 232 | $speed_config = self::get_config( self::OPTION_SPEED ); |
| 233 | $default_speed = $speed_config ? $speed_config['default'] : 9; |
| 234 | $snow_speed = get_option( self::OPTION_SPEED, $default_speed ); |
| 235 | |
| 236 | // Sanitize the value, using config if available, otherwise use hardcoded defaults. |
| 237 | if ( $speed_config ) { |
| 238 | $snow_speed = self::sanitize_option( $snow_speed, $speed_config ); |
| 239 | } else { |
| 240 | // Fallback sanitization if config not initialized: ensure it's between 1-20, default to 9. |
| 241 | $snow_speed = (int) $snow_speed; |
| 242 | if ( $snow_speed < 1 || $snow_speed > 20 ) { |
| 243 | $snow_speed = 9; |
| 244 | } |
| 245 | } |
| 246 | |
| 247 | echo '<div id="jetpack-holiday-snow" style="--jetpack-holiday-snow-speed: ' . (int) $snow_speed . 's;" ></div>'; |
| 248 | } |
| 249 | |
| 250 | /** |
| 251 | * Enqueue the snowstorm CSS on the frontend. |
| 252 | * |
| 253 | * @return void |
| 254 | */ |
| 255 | public static function holiday_snow_script() { |
| 256 | if ( |
| 257 | /** |
| 258 | * Allow short-circuiting the snow, even when enabled on the site in settings. |
| 259 | * |
| 260 | * @since 6.1.0 |
| 261 | * |
| 262 | * @param bool true Whether to show the snow. |
| 263 | */ |
| 264 | ! apply_filters( 'jetpack_holiday_chance_of_snow', true ) |
| 265 | ) { |
| 266 | return; |
| 267 | } |
| 268 | |
| 269 | /** |
| 270 | * Fires when the snow is falling. |
| 271 | * |
| 272 | * @since 6.1.0 |
| 273 | */ |
| 274 | do_action( 'jetpack_stats_extra', 'holiday_snow', 'snowing' ); |
| 275 | |
| 276 | wp_enqueue_style( |
| 277 | 'holiday-snow', |
| 278 | plugins_url( 'build/holiday-snow/holiday-snow.css', \Automattic\Jetpack\Jetpack_Mu_Wpcom::BASE_FILE ), |
| 279 | array(), |
| 280 | \Automattic\Jetpack\Jetpack_Mu_Wpcom::PACKAGE_VERSION |
| 281 | ); |
| 282 | } |
| 283 | |
| 284 | /** |
| 285 | * Add the option to the v1 API site settings endpoint. |
| 286 | * |
| 287 | * @param array $settings A single site's settings. |
| 288 | * @return array |
| 289 | */ |
| 290 | public static function add_option_api( $settings ) { |
| 291 | foreach ( self::$holiday_snow_config as $option_name => $option_config ) { |
| 292 | $value = get_option( $option_name, $option_config['default'] ); |
| 293 | $settings[ $option_name ] = self::sanitize_option( $value, $option_config ); |
| 294 | } |
| 295 | return $settings; |
| 296 | } |
| 297 | |
| 298 | /** |
| 299 | * Update settings via public-api.wordpress.com. |
| 300 | * |
| 301 | * @param array $input Associative array of site settings to be updated. |
| 302 | * Cast and filtered based on documentation. |
| 303 | * @param array $unfiltered_input Associative array of site settings to be updated. |
| 304 | * Neither cast nor filtered. Contains raw input. |
| 305 | * @return array |
| 306 | */ |
| 307 | public static function update_option_api( $input, $unfiltered_input ) { |
| 308 | foreach ( self::$holiday_snow_config as $option_name => $option_config ) { |
| 309 | if ( isset( $unfiltered_input[ $option_name ] ) ) { |
| 310 | $input[ $option_name ] = self::sanitize_option( $unfiltered_input[ $option_name ], $option_config ); |
| 311 | } |
| 312 | } |
| 313 | return $input; |
| 314 | } |
| 315 | |
| 316 | /** |
| 317 | * Registers the settings section and fields. |
| 318 | * |
| 319 | * @return void |
| 320 | */ |
| 321 | public static function register_settings() { |
| 322 | foreach ( self::$holiday_snow_config as $option_name => $option_config ) { |
| 323 | if ( 'boolean' === $option_config['type'] ) { |
| 324 | $sanitize_callback = 'boolval'; |
| 325 | } elseif ( 'integer' === $option_config['type'] ) { |
| 326 | $sanitize_callback = function ( $value ) use ( $option_config ) { |
| 327 | return self::sanitize_option_within_int_range( $value, $option_config ); |
| 328 | }; |
| 329 | } else { |
| 330 | // This shouldn't ever happen, but let's be careful anyway. |
| 331 | continue; |
| 332 | } |
| 333 | register_setting( |
| 334 | 'general', |
| 335 | $option_name, |
| 336 | array( |
| 337 | 'type' => $option_config['type'], |
| 338 | 'description' => esc_attr( $option_config['description'] ), |
| 339 | 'show_in_rest' => true, |
| 340 | 'default' => $option_config['default'], |
| 341 | 'sanitize_callback' => $sanitize_callback, |
| 342 | ) |
| 343 | ); |
| 344 | |
| 345 | // Hide settings as desired. |
| 346 | if ( ! empty( $option_config['hidden'] ) ) { |
| 347 | continue; |
| 348 | } |
| 349 | |
| 350 | add_settings_field( |
| 351 | $option_name, |
| 352 | esc_attr( $option_config['label'] ), |
| 353 | function () use ( $option_name, $option_config ) { |
| 354 | $value = get_option( $option_name, $option_config['default'] ); |
| 355 | if ( 'boolean' === $option_config['type'] ) { |
| 356 | printf( |
| 357 | '<input type="checkbox" name="%1$s" id="%1$s" value="1" %2$s /><label for="%1$s">%3$s</label>', |
| 358 | esc_attr( $option_name ), |
| 359 | checked( $value, true, false ), |
| 360 | esc_html( $option_config['description'] ) |
| 361 | ); |
| 362 | } elseif ( 'integer' === $option_config['type'] ) { |
| 363 | printf( |
| 364 | '<input type="number" name="%1$s" id="%1$s" value="%2$d" min="%3$d" max="%4$d" step="%5$d" />', |
| 365 | esc_attr( $option_name ), |
| 366 | (int) $value, |
| 367 | (int) $option_config['min'], |
| 368 | (int) $option_config['max'], |
| 369 | (int) $option_config['step'] |
| 370 | ); |
| 371 | printf( |
| 372 | '<p>%s</p>', |
| 373 | esc_html( $option_config['description'] ) |
| 374 | ); |
| 375 | printf( |
| 376 | '<p>%s</p>', |
| 377 | // translators: %s is the default snow speed value. |
| 378 | esc_html( sprintf( __( 'Default: %s', 'jetpack-mu-wpcom' ), $option_config['default'] ) ) |
| 379 | ); |
| 380 | } |
| 381 | }, |
| 382 | 'general', |
| 383 | 'default', |
| 384 | array( |
| 385 | 'label_for' => $option_name, |
| 386 | ) |
| 387 | ); |
| 388 | } |
| 389 | } |
| 390 | |
| 391 | /** |
| 392 | * Fires whenever the holiday snow option is updated. |
| 393 | * Used to gather stats about modified options. |
| 394 | * |
| 395 | * @return void |
| 396 | */ |
| 397 | public static function holiday_snow_option_updated() { |
| 398 | /** This action is already documented in modules/widgets/gravatar-profile.php */ |
| 399 | do_action( 'jetpack_stats_extra', 'holiday_snow', 'toggle' ); |
| 400 | } |
| 401 | |
| 402 | /** |
| 403 | * Sanitize a single option value using config. |
| 404 | * |
| 405 | * @param mixed $value The option value to sanitize. |
| 406 | * @param array $config Option config array. |
| 407 | * @return bool|int|null Sanitized value, or null if an unknown type. |
| 408 | */ |
| 409 | public static function sanitize_option( $value, $config ) { |
| 410 | if ( 'boolean' === $config['type'] ) { |
| 411 | return (bool) $value; |
| 412 | } elseif ( 'integer' === $config['type'] ) { |
| 413 | return self::sanitize_option_within_int_range( $value, $config ); |
| 414 | } |
| 415 | // this shouldn't ever happen, but just in case... |
| 416 | return null; |
| 417 | } |
| 418 | |
| 419 | /** |
| 420 | * Sanitize a value to be within a given min/max range, falling back to default as needed. |
| 421 | * Assumes 'min', 'max', and 'default' always exist in $config. |
| 422 | * |
| 423 | * @param mixed $value The value to sanitize. |
| 424 | * @param array $config Option config array. |
| 425 | * @return int The sanitized value, or default if out of range. |
| 426 | */ |
| 427 | public static function sanitize_option_within_int_range( $value, $config ) { |
| 428 | $value = (int) $value; |
| 429 | if ( $value < $config['min'] || $value > $config['max'] ) { |
| 430 | return $config['default']; |
| 431 | } |
| 432 | return $value; |
| 433 | } |
| 434 | } |