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<?php
/**
 * The base constants and defaults for LiteSpeed Cache.
 *
 * Defines all option keys, default values, and helper methods shared across the plugin.
 *
 * @since 3.7
 * @package LiteSpeed
 */

namespace LiteSpeed;

defined('WPINC') || exit();

/**
 * Class Base
 *
 * Core definitions and helpers shared across LiteSpeed Cache.
 */
class Base extends Root {

// This is redundant since v3.0
	// New conf items are `litespeed.key`
	const OPTION_NAME = 'litespeed-cache-conf';

const _CACHE = '_cache'; // final cache status from setting

// -------------------------------------------------- ##
	// --------------       General     ----------------- ##
	// -------------------------------------------------- ##
	const _VER           = '_version'; // Not set-able
	const HASH           = 'hash'; // Not set-able
	const O_AUTO_UPGRADE = 'auto_upgrade';
	const O_API_KEY      = 'api_key'; // Deprecated since v6.4. TODO: Will drop after v8 (still need to keep for v7 upgrade conf usage as v6.5.4 has a major user base)
	const O_SERVER_IP    = 'server_ip';
	const O_GUEST        = 'guest';
	const O_GUEST_OPTM   = 'guest_optm';
	const O_NEWS         = 'news';
	const O_GUEST_UAS    = 'guest_uas';
	const O_GUEST_IPS    = 'guest_ips';

// -------------------------------------------------- ##
	// --------------       Cache       ----------------- ##
	// -------------------------------------------------- ##
	const O_CACHE                = 'cache';
	const O_CACHE_PRIV           = 'cache-priv';
	const O_CACHE_COMMENTER      = 'cache-commenter';
	const O_CACHE_REST           = 'cache-rest';
	const O_CACHE_PAGE_LOGIN     = 'cache-page_login';
	const O_CACHE_RES            = 'cache-resources'; // Deprecated since v7.2. TODO: Drop after v7.5
	const O_CACHE_MOBILE         = 'cache-mobile';
	const O_CACHE_MOBILE_RULES   = 'cache-mobile_rules';
	const O_CACHE_BROWSER        = 'cache-browser';
	const O_CACHE_EXC_USERAGENTS = 'cache-exc_useragents';
	const O_CACHE_EXC_COOKIES    = 'cache-exc_cookies';
	const O_CACHE_EXC_QS         = 'cache-exc_qs';
	const O_CACHE_EXC_CAT        = 'cache-exc_cat';
	const O_CACHE_EXC_TAG        = 'cache-exc_tag';
	const O_CACHE_FORCE_URI      = 'cache-force_uri';
	const O_CACHE_FORCE_PUB_URI  = 'cache-force_pub_uri';
	const O_CACHE_PRIV_URI       = 'cache-priv_uri';
	const O_CACHE_EXC            = 'cache-exc';
	const O_CACHE_EXC_ROLES      = 'cache-exc_roles';
	const O_CACHE_DROP_QS        = 'cache-drop_qs';
	const O_CACHE_TTL_PUB        = 'cache-ttl_pub';
	const O_CACHE_TTL_PRIV       = 'cache-ttl_priv';
	const O_CACHE_TTL_FRONTPAGE  = 'cache-ttl_frontpage';
	const O_CACHE_TTL_FEED       = 'cache-ttl_feed';
	const O_CACHE_TTL_REST       = 'cache-ttl_rest';
	const O_CACHE_TTL_STATUS     = 'cache-ttl_status';
	const O_CACHE_TTL_BROWSER    = 'cache-ttl_browser';
	const O_CACHE_AJAX_TTL       = 'cache-ajax_ttl';
	const O_CACHE_LOGIN_COOKIE   = 'cache-login_cookie';
	const O_CACHE_VARY_COOKIES   = 'cache-vary_cookies';
	const O_CACHE_VARY_GROUP     = 'cache-vary_group';

// -------------------------------------------------- ##
	// --------------       Purge       ----------------- ##
	// -------------------------------------------------- ##
	const O_PURGE_ON_UPGRADE                   = 'purge-upgrade';
	const O_PURGE_STALE                        = 'purge-stale';
	const O_PURGE_POST_ALL                     = 'purge-post_all';
	const O_PURGE_POST_FRONTPAGE               = 'purge-post_f';
	const O_PURGE_POST_HOMEPAGE                = 'purge-post_h';
	const O_PURGE_POST_PAGES                   = 'purge-post_p';
	const O_PURGE_POST_PAGES_WITH_RECENT_POSTS = 'purge-post_pwrp';
	const O_PURGE_POST_AUTHOR                  = 'purge-post_a';
	const O_PURGE_POST_YEAR                    = 'purge-post_y';
	const O_PURGE_POST_MONTH                   = 'purge-post_m';
	const O_PURGE_POST_DATE                    = 'purge-post_d';
	const O_PURGE_POST_TERM                    = 'purge-post_t'; // include category|tag|tax
	const O_PURGE_POST_POSTTYPE                = 'purge-post_pt';
	const O_PURGE_TIMED_URLS                   = 'purge-timed_urls';
	const O_PURGE_TIMED_URLS_TIME              = 'purge-timed_urls_time';
	const O_PURGE_HOOK_ALL                     = 'purge-hook_all';

// -------------------------------------------------- ##
	// --------------        ESI        ----------------- ##
	// -------------------------------------------------- ##
	const O_ESI                = 'esi';
	const O_ESI_CACHE_ADMBAR   = 'esi-cache_admbar';
	const O_ESI_CACHE_COMMFORM = 'esi-cache_commform';
	const O_ESI_NONCE          = 'esi-nonce';

// -------------------------------------------------- ##
	// --------------     Utilities     ----------------- ##
	// -------------------------------------------------- ##
	const O_UTIL_INSTANT_CLICK = 'util-instant_click';
	const O_UTIL_NO_HTTPS_VARY = 'util-no_https_vary';

// -------------------------------------------------- ##
	// --------------       Debug       ----------------- ##
	// -------------------------------------------------- ##
	const O_DEBUG_DISABLE_ALL = 'debug-disable_all';
	const O_DEBUG             = 'debug';
	const O_DEBUG_IPS         = 'debug-ips';
	const O_DEBUG_LEVEL       = 'debug-level';
	const O_DEBUG_FILESIZE    = 'debug-filesize';
	const O_DEBUG_COOKIE      = 'debug-cookie'; // For backwards compatibility, will drop after v7.0
	const O_DEBUG_COLLAPSE_QS = 'debug-collapse_qs';
	const O_DEBUG_COLLAPS_QS  = 'debug-collapse_qs'; // For backwards compatibility, will drop after v6.5
	const O_DEBUG_INC         = 'debug-inc';
	const O_DEBUG_EXC         = 'debug-exc';
	const O_DEBUG_EXC_STRINGS = 'debug-exc_strings';

// -------------------------------------------------- ##
	// --------------      DB Optm      ----------------- ##
	// -------------------------------------------------- ##
	const O_DB_OPTM_REVISIONS_MAX = 'db_optm-revisions_max';
	const O_DB_OPTM_REVISIONS_AGE = 'db_optm-revisions_age';

// -------------------------------------------------- ##
	// --------------     HTML Optm     ----------------- ##
	// -------------------------------------------------- ##
	const O_OPTM_CSS_MIN                 = 'optm-css_min';
	const O_OPTM_CSS_COMB                = 'optm-css_comb';
	const O_OPTM_CSS_COMB_EXT_INL        = 'optm-css_comb_ext_inl';
	const O_OPTM_UCSS                    = 'optm-ucss';
	const O_OPTM_UCSS_INLINE             = 'optm-ucss_inline';
	const O_OPTM_UCSS_SELECTOR_WHITELIST = 'optm-ucss_whitelist';
	const O_OPTM_UCSS_FILE_EXC_INLINE    = 'optm-ucss_file_exc_inline';
	const O_OPTM_UCSS_EXC                = 'optm-ucss_exc';
	const O_OPTM_CSS_EXC                 = 'optm-css_exc';
	const O_OPTM_JS_MIN                  = 'optm-js_min';
	const O_OPTM_JS_COMB                 = 'optm-js_comb';
	const O_OPTM_JS_COMB_EXT_INL         = 'optm-js_comb_ext_inl';
	const O_OPTM_JS_DELAY_INC            = 'optm-js_delay_inc';
	const O_OPTM_JS_EXC                  = 'optm-js_exc';
	const O_OPTM_HTML_MIN                = 'optm-html_min';
	const O_OPTM_HTML_LAZY               = 'optm-html_lazy';
	const O_OPTM_HTML_SKIP_COMMENTS      = 'optm-html_skip_comment';
	const O_OPTM_QS_RM                   = 'optm-qs_rm';
	const O_OPTM_GGFONTS_RM              = 'optm-ggfonts_rm';
	const O_OPTM_CSS_ASYNC               = 'optm-css_async';
	const O_OPTM_CCSS_PER_URL            = 'optm-ccss_per_url';
	const O_OPTM_CCSS_SEP_POSTTYPE       = 'optm-ccss_sep_posttype';
	const O_OPTM_CCSS_SEP_URI            = 'optm-ccss_sep_uri';
	const O_OPTM_CCSS_SELECTOR_WHITELIST = 'optm-ccss_whitelist';
	const O_OPTM_CSS_ASYNC_INLINE        = 'optm-css_async_inline';
	const O_OPTM_CSS_FONT_DISPLAY        = 'optm-css_font_display';
	const O_OPTM_JS_DEFER                = 'optm-js_defer';
	const O_OPTM_LOCALIZE                = 'optm-localize';
	const O_OPTM_LOCALIZE_DOMAINS        = 'optm-localize_domains';
	const O_OPTM_EMOJI_RM                = 'optm-emoji_rm';
	const O_OPTM_NOSCRIPT_RM             = 'optm-noscript_rm';
	const O_OPTM_GGFONTS_ASYNC           = 'optm-ggfonts_async';
	const O_OPTM_EXC_ROLES               = 'optm-exc_roles';
	const O_OPTM_CCSS_CON                = 'optm-ccss_con';
	const O_OPTM_JS_DEFER_EXC            = 'optm-js_defer_exc';
	const O_OPTM_GM_JS_EXC               = 'optm-gm_js_exc';
	const O_OPTM_DNS_PREFETCH            = 'optm-dns_prefetch';
	const O_OPTM_DNS_PREFETCH_CTRL       = 'optm-dns_prefetch_ctrl';
	const O_OPTM_DNS_PRECONNECT          = 'optm-dns_preconnect';
	const O_OPTM_EXC                     = 'optm-exc';
	const O_OPTM_GUEST_ONLY              = 'optm-guest_only';

// -------------------------------------------------- ##
	// --------------   Object Cache    ----------------- ##
	// -------------------------------------------------- ##
	const O_OBJECT                       = 'object';
	const O_OBJECT_KIND                  = 'object-kind';
	const O_OBJECT_HOST                  = 'object-host';
	const O_OBJECT_PORT                  = 'object-port';
	const O_OBJECT_LIFE                  = 'object-life';
	const O_OBJECT_PERSISTENT            = 'object-persistent';
	const O_OBJECT_ADMIN                 = 'object-admin';
	const O_OBJECT_TRANSIENTS            = 'object-transients';
	const O_OBJECT_DB_ID                 = 'object-db_id';
	const O_OBJECT_USER                  = 'object-user';
	const O_OBJECT_PSWD                  = 'object-pswd';
	const O_OBJECT_GLOBAL_GROUPS         = 'object-global_groups';
	const O_OBJECT_NON_PERSISTENT_GROUPS = 'object-non_persistent_groups';

// -------------------------------------------------- ##
	// --------------   Discussion      ----------------- ##
	// -------------------------------------------------- ##
	const O_DISCUSS_AVATAR_CACHE     = 'discuss-avatar_cache';
	const O_DISCUSS_AVATAR_CRON      = 'discuss-avatar_cron';
	const O_DISCUSS_AVATAR_CACHE_TTL = 'discuss-avatar_cache_ttl';

// -------------------------------------------------- ##
	// --------------        Media      ----------------- ##
	// -------------------------------------------------- ##
	const O_MEDIA_PRELOAD_FEATURED           = 'media-preload_featured'; // Deprecated since v6.2. TODO: Will drop after v6.5
	const O_MEDIA_LAZY                       = 'media-lazy';
	const O_MEDIA_LAZY_PLACEHOLDER           = 'media-lazy_placeholder';
	const O_MEDIA_PLACEHOLDER_RESP           = 'media-placeholder_resp';
	const O_MEDIA_PLACEHOLDER_RESP_COLOR     = 'media-placeholder_resp_color';
	const O_MEDIA_PLACEHOLDER_RESP_SVG       = 'media-placeholder_resp_svg';
	const O_MEDIA_LQIP                       = 'media-lqip';
	const O_MEDIA_LQIP_QUAL                  = 'media-lqip_qual';
	const O_MEDIA_LQIP_MIN_W                 = 'media-lqip_min_w';
	const O_MEDIA_LQIP_MIN_H                 = 'media-lqip_min_h';
	const O_MEDIA_PLACEHOLDER_RESP_ASYNC     = 'media-placeholder_resp_async';
	const O_MEDIA_IFRAME_LAZY                = 'media-iframe_lazy';
	const O_MEDIA_ADD_MISSING_SIZES          = 'media-add_missing_sizes';
	const O_MEDIA_LAZY_EXC                   = 'media-lazy_exc';
	const O_MEDIA_LAZY_CLS_EXC               = 'media-lazy_cls_exc';
	const O_MEDIA_LAZY_PARENT_CLS_EXC        = 'media-lazy_parent_cls_exc';
	const O_MEDIA_IFRAME_LAZY_CLS_EXC        = 'media-iframe_lazy_cls_exc';
	const O_MEDIA_IFRAME_LAZY_PARENT_CLS_EXC = 'media-iframe_lazy_parent_cls_exc';
	const O_MEDIA_LAZY_URI_EXC               = 'media-lazy_uri_exc';
	const O_MEDIA_LQIP_EXC                   = 'media-lqip_exc';
	const O_MEDIA_VPI                        = 'media-vpi';
	const O_MEDIA_VPI_CRON                   = 'media-vpi_cron';
	const O_IMG_OPTM_JPG_QUALITY             = 'img_optm-jpg_quality';
	const O_MEDIA_AUTO_RESCALE_ORI           = 'media-auto_rescale_ori';

// -------------------------------------------------- ##
	// --------------     Image Optm    ----------------- ##
	// -------------------------------------------------- ##
	const O_IMG_OPTM_AUTO                = 'img_optm-auto';
	const O_IMG_OPTM_CRON                = 'img_optm-cron'; // @Deprecated since v7.0 TODO: remove after v7.5
	const O_IMG_OPTM_ORI                 = 'img_optm-ori';
	const O_IMG_OPTM_RM_BKUP             = 'img_optm-rm_bkup';
	const O_IMG_OPTM_WEBP                = 'img_optm-webp';
	const O_IMG_OPTM_LOSSLESS            = 'img_optm-lossless';
	const O_IMG_OPTM_SIZES_SKIPPED       = 'img_optm-sizes_skipped';
	const O_IMG_OPTM_EXIF                = 'img_optm-exif';
	const O_IMG_OPTM_WEBP_ATTR           = 'img_optm-webp_attr';
	const O_IMG_OPTM_WEBP_REPLACE_SRCSET = 'img_optm-webp_replace_srcset';

// -------------------------------------------------- ##
	// --------------       Crawler     ----------------- ##
	// -------------------------------------------------- ##
	const O_CRAWLER                = 'crawler';
	const O_CRAWLER_USLEEP         = 'crawler-usleep'; // @Deprecated since v7.0 TODO: remove after v7.5
	const O_CRAWLER_RUN_DURATION   = 'crawler-run_duration'; // @Deprecated since v7.0 TODO: remove after v7.5
	const O_CRAWLER_RUN_INTERVAL   = 'crawler-run_interval'; // @Deprecated since v7.0 TODO: remove after v7.5
	const O_CRAWLER_CRAWL_INTERVAL = 'crawler-crawl_interval';
	const O_CRAWLER_THREADS        = 'crawler-threads'; // @Deprecated since v7.0 TODO: remove after v7.5
	const O_CRAWLER_TIMEOUT        = 'crawler-timeout'; // @Deprecated since v7.0 TODO: remove after v7.5
	const O_CRAWLER_LOAD_LIMIT     = 'crawler-load_limit';
	const O_CRAWLER_SITEMAP        = 'crawler-sitemap';
	const O_CRAWLER_DROP_DOMAIN    = 'crawler-drop_domain'; // @Deprecated since v7.0 TODO: remove after v7.5
	const O_CRAWLER_MAP_TIMEOUT    = 'crawler-map_timeout'; // @Deprecated since v7.0 TODO: remove after v7.5
	const O_CRAWLER_ROLES          = 'crawler-roles';
	const O_CRAWLER_COOKIES        = 'crawler-cookies';

// -------------------------------------------------- ##
	// --------------        Misc       ----------------- ##
	// -------------------------------------------------- ##
	const O_MISC_HEARTBEAT_FRONT      = 'misc-heartbeat_front';
	const O_MISC_HEARTBEAT_FRONT_TTL  = 'misc-heartbeat_front_ttl';
	const O_MISC_HEARTBEAT_BACK       = 'misc-heartbeat_back';
	const O_MISC_HEARTBEAT_BACK_TTL   = 'misc-heartbeat_back_ttl';
	const O_MISC_HEARTBEAT_EDITOR     = 'misc-heartbeat_editor';
	const O_MISC_HEARTBEAT_EDITOR_TTL = 'misc-heartbeat_editor_ttl';

// -------------------------------------------------- ##
	// --------------        CDN        ----------------- ##
	// -------------------------------------------------- ##
	const O_CDN                  = 'cdn';
	const O_CDN_ORI              = 'cdn-ori';
	const O_CDN_ORI_DIR          = 'cdn-ori_dir';
	const O_CDN_EXC              = 'cdn-exc';
	const O_CDN_QUIC             = 'cdn-quic'; // No more a visible setting since v7
	const O_CDN_CLOUDFLARE       = 'cdn-cloudflare';
	const O_CDN_CLOUDFLARE_EMAIL = 'cdn-cloudflare_email';
	const O_CDN_CLOUDFLARE_KEY   = 'cdn-cloudflare_key';
	const O_CDN_CLOUDFLARE_NAME  = 'cdn-cloudflare_name';
	const O_CDN_CLOUDFLARE_ZONE  = 'cdn-cloudflare_zone';
	const O_CDN_CLOUDFLARE_CLEAR = 'cdn-cloudflare_clear';
	const O_CDN_MAPPING          = 'cdn-mapping';
	const O_CDN_ATTR             = 'cdn-attr';
	const O_QC_NAMESERVERS       = 'qc-nameservers';
	const O_QC_CNAME             = 'qc-cname';

// -------------------------------------------------- ##
	// --------------      OptimaX      ----------------- ##
	// -------------------------------------------------- ##
	const O_OPTIMAX = 'optimax';

const NETWORK_O_USE_PRIMARY = 'use_primary_settings';

const DEBUG_TMP_DISABLE = 'debug-disable_tmp';

/*** Other consts ***/
	const O_GUIDE = 'litespeed-guide'; // Array of each guidance tag as key, step as val //xx todo: may need to remove

// Server variables
	const ENV_CRAWLER_USLEEP             = 'CRAWLER_USLEEP';
	const ENV_CRAWLER_LOAD_LIMIT         = 'CRAWLER_LOAD_LIMIT';
	const ENV_CRAWLER_LOAD_LIMIT_ENFORCE = 'CRAWLER_LOAD_LIMIT_ENFORCE';

const CRWL_COOKIE_NAME = 'name';
	const CRWL_COOKIE_VALS = 'vals';

const CDN_MAPPING_URL      = 'url';
	const CDN_MAPPING_INC_IMG  = 'inc_img';
	const CDN_MAPPING_INC_CSS  = 'inc_css';
	const CDN_MAPPING_INC_JS   = 'inc_js';
	const CDN_MAPPING_FILETYPE = 'filetype';

const VAL_OFF = 0;
	const VAL_ON  = 1;
	const VAL_ON2 = 2;

/* This is for API hook usage */
	const IMG_OPTM_BM_ORI      = 1; // @Deprecated since v7.0
	const IMG_OPTM_BM_WEBP     = 2; // @Deprecated since v7.0
	const IMG_OPTM_BM_LOSSLESS = 4; // @Deprecated since v7.0
	const IMG_OPTM_BM_EXIF     = 8; // @Deprecated since v7.0
	const IMG_OPTM_BM_AVIF     = 16; // @Deprecated since v7.0

/**
	 * Site related options (Will not overwrite other sites' config).
	 *
	 * @var string[]
	 */
	protected static $single_site_options = [
		self::O_CRAWLER,
		self::O_CRAWLER_SITEMAP,
		self::O_CDN,
		self::O_CDN_ORI,
		self::O_CDN_ORI_DIR,
		self::O_CDN_EXC,
		self::O_CDN_CLOUDFLARE,
		self::O_CDN_CLOUDFLARE_EMAIL,
		self::O_CDN_CLOUDFLARE_KEY,
		self::O_CDN_CLOUDFLARE_NAME,
		self::O_CDN_CLOUDFLARE_ZONE,
		self::O_CDN_CLOUDFLARE_CLEAR,
		self::O_CDN_MAPPING,
		self::O_CDN_ATTR,
		self::O_QC_NAMESERVERS,
		self::O_QC_CNAME,
	];

/**
	 * Default options for single-site installs.
	 *
	 * @var array<string,mixed>
	 */
	protected static $_default_options = [
		self::_VER => '',
		self::HASH => '',
		self::O_API_KEY => '',
		self::O_AUTO_UPGRADE => false,
		self::O_SERVER_IP => '',
		self::O_GUEST => false,
		self::O_GUEST_OPTM => false,
		self::O_NEWS => false,
		self::O_GUEST_UAS => [],
		self::O_GUEST_IPS => [],

// Cache
		self::O_CACHE => false,
		self::O_CACHE_PRIV => false,
		self::O_CACHE_COMMENTER => false,
		self::O_CACHE_REST => false,
		self::O_CACHE_PAGE_LOGIN => false,
		self::O_CACHE_MOBILE => false,
		self::O_CACHE_MOBILE_RULES => [],
		self::O_CACHE_BROWSER => false,
		self::O_CACHE_EXC_USERAGENTS => [],
		self::O_CACHE_EXC_COOKIES => [],
		self::O_CACHE_EXC_QS => [],
		self::O_CACHE_EXC_CAT => [],
		self::O_CACHE_EXC_TAG => [],
		self::O_CACHE_FORCE_URI => [],
		self::O_CACHE_FORCE_PUB_URI => [],
		self::O_CACHE_PRIV_URI => [],
		self::O_CACHE_EXC => [],
		self::O_CACHE_EXC_ROLES => [],
		self::O_CACHE_DROP_QS => [],
		self::O_CACHE_TTL_PUB => 0,
		self::O_CACHE_TTL_PRIV => 0,
		self::O_CACHE_TTL_FRONTPAGE => 0,
		self::O_CACHE_TTL_FEED => 0,
		self::O_CACHE_TTL_REST => 0,
		self::O_CACHE_TTL_BROWSER => 0,
		self::O_CACHE_TTL_STATUS => [],
		self::O_CACHE_LOGIN_COOKIE => '',
		self::O_CACHE_AJAX_TTL => [],
		self::O_CACHE_VARY_COOKIES => [],
		self::O_CACHE_VARY_GROUP => [],

// Purge
		self::O_PURGE_ON_UPGRADE => false,
		self::O_PURGE_STALE => false,
		self::O_PURGE_POST_ALL => false,
		self::O_PURGE_POST_FRONTPAGE => false,
		self::O_PURGE_POST_HOMEPAGE => false,
		self::O_PURGE_POST_PAGES => false,
		self::O_PURGE_POST_PAGES_WITH_RECENT_POSTS => false,
		self::O_PURGE_POST_AUTHOR => false,
		self::O_PURGE_POST_YEAR => false,
		self::O_PURGE_POST_MONTH => false,
		self::O_PURGE_POST_DATE => false,
		self::O_PURGE_POST_TERM => false,
		self::O_PURGE_POST_POSTTYPE => false,
		self::O_PURGE_TIMED_URLS => [],
		self::O_PURGE_TIMED_URLS_TIME => '',
		self::O_PURGE_HOOK_ALL => [],

// ESI
		self::O_ESI => false,
		self::O_ESI_CACHE_ADMBAR => false,
		self::O_ESI_CACHE_COMMFORM => false,
		self::O_ESI_NONCE => [],

// Util
		self::O_UTIL_INSTANT_CLICK => false,
		self::O_UTIL_NO_HTTPS_VARY => false,

// Debug
		self::O_DEBUG_DISABLE_ALL => false,
		self::O_DEBUG => false,
		self::O_DEBUG_IPS => [],
		self::O_DEBUG_LEVEL => false,
		self::O_DEBUG_FILESIZE => 0,
		self::O_DEBUG_COLLAPSE_QS => false,
		self::O_DEBUG_INC => [],
		self::O_DEBUG_EXC => [],
		self::O_DEBUG_EXC_STRINGS => [],

// DB Optm
		self::O_DB_OPTM_REVISIONS_MAX => 0,
		self::O_DB_OPTM_REVISIONS_AGE => 0,

// HTML Optm
		self::O_OPTM_CSS_MIN => false,
		self::O_OPTM_CSS_COMB => false,
		self::O_OPTM_CSS_COMB_EXT_INL => false,
		self::O_OPTM_UCSS => false,
		self::O_OPTM_UCSS_INLINE => false,
		self::O_OPTM_UCSS_SELECTOR_WHITELIST => [],
		self::O_OPTM_UCSS_FILE_EXC_INLINE => [],
		self::O_OPTM_UCSS_EXC => [],
		self::O_OPTM_CSS_EXC => [],
		self::O_OPTM_JS_MIN => false,
		self::O_OPTM_JS_COMB => false,
		self::O_OPTM_JS_COMB_EXT_INL => false,
		self::O_OPTM_JS_DELAY_INC => [],
		self::O_OPTM_JS_EXC => [],
		self::O_OPTM_HTML_MIN => false,
		self::O_OPTM_HTML_LAZY => [],
		self::O_OPTM_HTML_SKIP_COMMENTS => [],
		self::O_OPTM_QS_RM => false,
		self::O_OPTM_GGFONTS_RM => false,
		self::O_OPTM_CSS_ASYNC => false,
		self::O_OPTM_CCSS_PER_URL => false,
		self::O_OPTM_CCSS_SEP_POSTTYPE => [],
		self::O_OPTM_CCSS_SEP_URI => [],
		self::O_OPTM_CCSS_SELECTOR_WHITELIST => [],
		self::O_OPTM_CSS_ASYNC_INLINE => false,
		self::O_OPTM_CSS_FONT_DISPLAY => false,
		self::O_OPTM_JS_DEFER => false,
		self::O_OPTM_EMOJI_RM => false,
		self::O_OPTM_NOSCRIPT_RM => false,
		self::O_OPTM_GGFONTS_ASYNC => false,
		self::O_OPTM_EXC_ROLES => [],
		self::O_OPTM_CCSS_CON => '',
		self::O_OPTM_JS_DEFER_EXC => [],
		self::O_OPTM_GM_JS_EXC => [],
		self::O_OPTM_DNS_PREFETCH => [],
		self::O_OPTM_DNS_PREFETCH_CTRL => false,
		self::O_OPTM_DNS_PRECONNECT => [],
		self::O_OPTM_EXC => [],
		self::O_OPTM_GUEST_ONLY => false,

// Object
		self::O_OBJECT => false,
		self::O_OBJECT_KIND => false,
		self::O_OBJECT_HOST => '',
		self::O_OBJECT_PORT => 0,
		self::O_OBJECT_LIFE => 0,
		self::O_OBJECT_PERSISTENT => false,
		self::O_OBJECT_ADMIN => false,
		self::O_OBJECT_TRANSIENTS => false,
		self::O_OBJECT_DB_ID => 0,
		self::O_OBJECT_USER => '',
		self::O_OBJECT_PSWD => '',
		self::O_OBJECT_GLOBAL_GROUPS => [],
		self::O_OBJECT_NON_PERSISTENT_GROUPS => [],

// Discuss
		self::O_DISCUSS_AVATAR_CACHE => false,
		self::O_DISCUSS_AVATAR_CRON => false,
		self::O_DISCUSS_AVATAR_CACHE_TTL => 0,
		self::O_OPTM_LOCALIZE => false,
		self::O_OPTM_LOCALIZE_DOMAINS => [],

// Media
		self::O_MEDIA_LAZY => false,
		self::O_MEDIA_LAZY_PLACEHOLDER => '',
		self::O_MEDIA_PLACEHOLDER_RESP => false,
		self::O_MEDIA_PLACEHOLDER_RESP_COLOR => '',
		self::O_MEDIA_PLACEHOLDER_RESP_SVG => '',
		self::O_MEDIA_LQIP => false,
		self::O_MEDIA_LQIP_QUAL => 0,
		self::O_MEDIA_LQIP_MIN_W => 0,
		self::O_MEDIA_LQIP_MIN_H => 0,
		self::O_MEDIA_PLACEHOLDER_RESP_ASYNC => false,
		self::O_MEDIA_IFRAME_LAZY => false,
		self::O_MEDIA_ADD_MISSING_SIZES => false,
		self::O_MEDIA_LAZY_EXC => [],
		self::O_MEDIA_LAZY_CLS_EXC => [],
		self::O_MEDIA_LAZY_PARENT_CLS_EXC => [],
		self::O_MEDIA_IFRAME_LAZY_CLS_EXC => [],
		self::O_MEDIA_IFRAME_LAZY_PARENT_CLS_EXC => [],
		self::O_MEDIA_LAZY_URI_EXC => [],
		self::O_MEDIA_LQIP_EXC => [],
		self::O_MEDIA_VPI => false,
		self::O_MEDIA_VPI_CRON => false,
		self::O_MEDIA_AUTO_RESCALE_ORI => false,

// Image Optm
		self::O_IMG_OPTM_AUTO => false,
		self::O_IMG_OPTM_ORI => false,
		self::O_IMG_OPTM_RM_BKUP => false,
		self::O_IMG_OPTM_WEBP => false,
		self::O_IMG_OPTM_LOSSLESS => false,
		self::O_IMG_OPTM_SIZES_SKIPPED => [],
		self::O_IMG_OPTM_EXIF => false,
		self::O_IMG_OPTM_WEBP_ATTR => [],
		self::O_IMG_OPTM_WEBP_REPLACE_SRCSET => false,
		self::O_IMG_OPTM_JPG_QUALITY => 0,

// Crawler
		self::O_CRAWLER => false,
		self::O_CRAWLER_CRAWL_INTERVAL => 0,
		self::O_CRAWLER_LOAD_LIMIT => 0,
		self::O_CRAWLER_SITEMAP => '',
		self::O_CRAWLER_ROLES => [],
		self::O_CRAWLER_COOKIES => [],

// Misc
		self::O_MISC_HEARTBEAT_FRONT => false,
		self::O_MISC_HEARTBEAT_FRONT_TTL => 0,
		self::O_MISC_HEARTBEAT_BACK => false,
		self::O_MISC_HEARTBEAT_BACK_TTL => 0,
		self::O_MISC_HEARTBEAT_EDITOR => false,
		self::O_MISC_HEARTBEAT_EDITOR_TTL => 0,

// CDN
		self::O_CDN => false,
		self::O_CDN_ORI => [],
		self::O_CDN_ORI_DIR => [],
		self::O_CDN_EXC => [],
		self::O_CDN_QUIC => false,
		self::O_CDN_CLOUDFLARE => false,
		self::O_CDN_CLOUDFLARE_EMAIL => '',
		self::O_CDN_CLOUDFLARE_KEY => '',
		self::O_CDN_CLOUDFLARE_NAME => '',
		self::O_CDN_CLOUDFLARE_ZONE => '',
		self::O_CDN_CLOUDFLARE_CLEAR => false,
		self::O_CDN_MAPPING => [],
		self::O_CDN_ATTR => [],

self::O_QC_NAMESERVERS => '',
		self::O_QC_CNAME => '',

self::DEBUG_TMP_DISABLE => 0,
	];

/**
	 * Default options for multisite (site-level options stored network-wide).
	 *
	 * @var array<string,mixed>
	 */
	protected static $_default_site_options = [
		self::_VER => '',
		self::O_CACHE => false,
		self::NETWORK_O_USE_PRIMARY => false,
		self::O_AUTO_UPGRADE => false,
		self::O_GUEST => false,

self::O_CACHE_BROWSER => false,
		self::O_CACHE_MOBILE => false,
		self::O_CACHE_MOBILE_RULES => [],
		self::O_CACHE_DROP_QS => [],
		self::O_CACHE_LOGIN_COOKIE => '',
		self::O_CACHE_VARY_COOKIES => [],
		self::O_CACHE_EXC_COOKIES => [],
		self::O_CACHE_EXC_USERAGENTS => [],
		self::O_CACHE_TTL_BROWSER => 0,

self::O_PURGE_ON_UPGRADE => false,

self::O_OBJECT => false,
		self::O_OBJECT_KIND => false,
		self::O_OBJECT_HOST => '',
		self::O_OBJECT_PORT => 0,
		self::O_OBJECT_LIFE => 0,
		self::O_OBJECT_PERSISTENT => false,
		self::O_OBJECT_ADMIN => false,
		self::O_OBJECT_TRANSIENTS => false,
		self::O_OBJECT_DB_ID => 0,
		self::O_OBJECT_USER => '',
		self::O_OBJECT_PSWD => '',
		self::O_OBJECT_GLOBAL_GROUPS => [],
		self::O_OBJECT_NON_PERSISTENT_GROUPS => [],

self::O_IMG_OPTM_WEBP => false,
	];

/**
	 * Multi-switch options: option ID => max state (int).
	 * NOTE: all the val of following items will be int while not bool
	 *
	 * @var array<string,int>
	 */
	protected static $_multi_switch_list = [
		self::O_DEBUG => 2,
		self::O_OPTM_JS_DEFER => 2,
		self::O_IMG_OPTM_WEBP => 2,
	];

/**
	 * Correct the option type.
	 *
	 * TODO: add similar network func
	 *
	 * @since 3.0.3
	 *
	 * @param mixed  $val          Incoming value.
	 * @param string $id           Option ID.
	 * @param bool   $is_site_conf Whether using site-level defaults.
	 * @return mixed
	 */
	protected function type_casting( $val, $id, $is_site_conf = false ) {
		$default_v = ! $is_site_conf ? self::$_default_options[ $id ] : self::$_default_site_options[ $id ];
		if ( is_bool( $default_v ) ) {
			if ( 'true' === $val ) {
				$val = true;
			}
			if ( 'false' === $val ) {
				$val = false;
			}

$max = $this->_conf_multi_switch( $id );
			if ( $max ) {
				$val  = (int) $val;
				$val %= $max + 1;
			} else {
				$val = (bool) $val;
			}
		} elseif ( is_array( $default_v ) ) {
			// from textarea input
			if ( ! is_array( $val ) ) {
				$val = Utility::sanitize_lines( $val, $this->_conf_filter( $id ) );
			}
		} elseif ( ! is_string( $default_v ) ) {
			$val = (int) $val;
		} else {
			// Check if the string has a limit set
			$val = $this->_conf_string_val( $id, $val );
		}

return $val;
	}

/**
	 * Load default network settings from data.ini
	 *
	 * @since 3.0
	 * @return array<string,mixed>
	 */
	public function load_default_site_vals() {
		// Load network_default.json
		if ( file_exists( LSCWP_DIR . 'data/const.network_default.json' ) ) {
			$default_ini_cfg = json_decode( File::read( LSCWP_DIR . 'data/const.network_default.json' ), true );
			foreach ( self::$_default_site_options as $k => $v ) {
				if ( ! array_key_exists( $k, $default_ini_cfg ) ) {
					continue;
				}

// Parse value in ini file
				$ini_v = $this->type_casting( $default_ini_cfg[ $k ], $k, true );

if ( $ini_v === $v ) {
					continue;
				}

self::$_default_site_options[ $k ] = $ini_v;
			}
		}

self::$_default_site_options[ self::_VER ] = Core::VER;

return self::$_default_site_options;
	}

/**
	 * Load default values from default.json
	 *
	 * @since 3.0
	 * @access public
	 * @return array<string,mixed>
	 */
	public function load_default_vals() {
		// Load default.json
		if ( file_exists( LSCWP_DIR . 'data/const.default.json' ) ) {
			$default_ini_cfg = json_decode( File::read( LSCWP_DIR . 'data/const.default.json' ), true );
			foreach ( self::$_default_options as $k => $v ) {
				if ( ! array_key_exists( $k, $default_ini_cfg ) ) {
					continue;
				}

// Parse value in ini file
				$ini_v = $this->type_casting( $default_ini_cfg[ $k ], $k );

// NOTE: Multiple lines value must be stored as array
				/**
				 * Special handler for CDN_mapping
				 *
				 * Format in .ini:
				 *      [cdn-mapping]
				 *      url[0] = 'https://example.com/'
				 *      inc_js[0] = true
				 *      filetype[0] = '.css
				 *                     .js
				 *                     .jpg'
				 *
				 * format out:
				 *      [0] = [ 'url' => 'https://example.com', 'inc_js' => true, 'filetype' => [ '.css', '.js', '.jpg' ] ]
				 */
				if ( self::O_CDN_MAPPING === $k ) {
					$mapping_fields = [
						self::CDN_MAPPING_URL,
						self::CDN_MAPPING_INC_IMG,
						self::CDN_MAPPING_INC_CSS,
						self::CDN_MAPPING_INC_JS,
						self::CDN_MAPPING_FILETYPE, // Array
					];
					$ini_v2         = [];
					foreach ( $ini_v[ self::CDN_MAPPING_URL ] as $k2 => $v2 ) {
						// $k2 is numeric
						$this_row = [];
						foreach ( $mapping_fields as $v3 ) {
							$this_v = ! empty( $ini_v[ $v3 ][ $k2 ] ) ? $ini_v[ $v3 ][ $k2 ] : false;
							if ( self::CDN_MAPPING_URL === $v3 ) {
								if ( empty( $this_v ) ) {
									$this_v = '';
								}
							}
							if ( self::CDN_MAPPING_FILETYPE === $v3 ) {
								$this_v = $this_v ? Utility::sanitize_lines( $this_v ) : []; // Note: Since v3.0 its already an array
							}
							$this_row[ $v3 ] = $this_v;
						}
						$ini_v2[ $k2 ] = $this_row;
					}
					$ini_v = $ini_v2;
				}

if ( $ini_v === $v ) {
					continue;
				}

self::$_default_options[ $k ] = $ini_v;
			}
		}

// Load internal default vals
		// Setting the default bool to int is also to avoid type casting override it back to bool
		self::$_default_options[ self::O_CACHE ] = is_multisite() ? self::VAL_ON2 : self::VAL_ON; // For multi site, default is 2 (Use Network Admin Settings). For single site, default is 1 (Enabled).

// Load default vals containing variables
		if ( ! self::$_default_options[ self::O_CDN_ORI_DIR ] ) {
			self::$_default_options[ self::O_CDN_ORI_DIR ] = LSCWP_CONTENT_FOLDER . "\nwp-includes";
			self::$_default_options[ self::O_CDN_ORI_DIR ] = explode( "\n", self::$_default_options[ self::O_CDN_ORI_DIR ] );
			self::$_default_options[ self::O_CDN_ORI_DIR ] = array_map( 'trim', self::$_default_options[ self::O_CDN_ORI_DIR ] );
		}

// Set security key if not initialized yet
		if ( ! self::$_default_options[ self::HASH ] ) {
			self::$_default_options[ self::HASH ] = Str::rrand( 32 );
		}

self::$_default_options[ self::_VER ] = Core::VER;

return self::$_default_options;
	}

/**
	 * Format the string value.
	 *
	 * @since 3.0
	 *
	 * @param string $id  Option ID.
	 * @param mixed  $val Value.
	 * @return string
	 */
	protected function _conf_string_val( $id, $val ) {
		return (string) $val;
	}

/**
	 * If the switch setting is a triple value or not.
	 *
	 * @since 3.0
	 *
	 * @param string $id Option ID.
	 * @return int|false
	 */
	protected function _conf_multi_switch( $id ) {
		if ( ! empty( self::$_multi_switch_list[ $id ] ) ) {
			return self::$_multi_switch_list[ $id ];
		}

if ( self::O_CACHE === $id && is_multisite() ) {
			return self::VAL_ON2;
		}

return false;
	}

/**
	 * Append a new multi switch max limit for the bool option.
	 *
	 * @since 3.0
	 *
	 * @param string $id Option ID.
	 * @param int    $v  Max state.
	 * @return void
	 */
	public static function set_multi_switch( $id, $v ) {
		self::$_multi_switch_list[ $id ] = $v;
	}

/**
	 * Generate const name based on $id.
	 *
	 * @since 3.0
	 *
	 * @param string $id Option ID.
	 * @return string
	 */
	public static function conf_const( $id ) {
		return 'LITESPEED_CONF__' . strtoupper( str_replace( '-', '__', $id ) );
	}

/**
	 * Filter to be used when saving setting.
	 *
	 * @since 3.0
	 *
	 * @param string $id Option ID.
	 * @return string|false
	 */
	protected function _conf_filter( $id ) {
		$filters = [
			self::O_MEDIA_LAZY_EXC => 'uri',
			self::O_DEBUG_INC => 'relative',
			self::O_DEBUG_EXC => 'relative',
			self::O_MEDIA_LAZY_URI_EXC => 'relative',
			self::O_CACHE_PRIV_URI => 'relative',
			self::O_PURGE_TIMED_URLS => 'relative',
			self::O_CACHE_FORCE_URI => 'relative',
			self::O_CACHE_FORCE_PUB_URI => 'relative',
			self::O_CACHE_EXC => 'relative',
			// self::O_OPTM_CSS_EXC     => 'uri', // Need to comment out for inline & external CSS
			// self::O_OPTM_JS_EXC          => 'uri',
			self::O_OPTM_EXC => 'relative',
			self::O_OPTM_CCSS_SEP_URI => 'uri',
			// self::O_OPTM_JS_DEFER_EXC    => 'uri',
			self::O_OPTM_DNS_PREFETCH => 'domain',
			self::O_CDN_ORI => 'noprotocol,trailingslash', // `Original URLs`
			// self::O_OPTM_LOCALIZE_DOMAINS    => 'noprotocol', // `Localize Resources`
			// self::   => '',
			// self::   => '',
		];

if ( ! empty( $filters[ $id ] ) ) {
			return $filters[ $id ];
		}

return false;
	}

/**
	 * If the setting changes worth a purge or not.
	 *
	 * @since 3.0
	 *
	 * @param string $id Option ID.
	 * @return bool
	 */
	protected function _conf_purge( $id ) {
		$check_ids = [
			self::O_MEDIA_LAZY_URI_EXC,
			self::O_OPTM_EXC,
			self::O_CACHE_PRIV_URI,
			self::O_PURGE_TIMED_URLS,
			self::O_CACHE_FORCE_URI,
			self::O_CACHE_FORCE_PUB_URI,
			self::O_CACHE_EXC,
		];

return in_array( $id, $check_ids, true );
	}

/**
	 * If the setting changes worth a purge ALL or not.
	 *
	 * @since 3.0
	 *
	 * @param string $id Option ID.
	 * @return bool
	 */
	protected function _conf_purge_all( $id ) {
		$check_ids = [ self::O_CACHE, self::O_ESI, self::O_DEBUG_DISABLE_ALL, self::NETWORK_O_USE_PRIMARY ];

return in_array( $id, $check_ids, true );
	}

/**
	 * If the setting is a password or not.
	 *
	 * @since 3.0
	 *
	 * @param string $id Option ID.
	 * @return bool
	 */
	protected function _conf_pswd( $id ) {
		$check_ids = [ self::O_CDN_CLOUDFLARE_KEY, self::O_OBJECT_PSWD ];

return in_array( $id, $check_ids, true );
	}

/**
	 * If the setting is cron related or not.
	 *
	 * @since 3.0
	 *
	 * @param string $id Option ID.
	 * @return bool
	 */
	protected function _conf_cron( $id ) {
		$check_ids = [ self::O_OPTM_CSS_ASYNC, self::O_MEDIA_PLACEHOLDER_RESP_ASYNC, self::O_DISCUSS_AVATAR_CRON, self::O_IMG_OPTM_AUTO, self::O_CRAWLER ];

return in_array( $id, $check_ids, true );
	}

/**
	 * If the setting changes worth a purge, return the tag.
	 *
	 * @since 3.0
	 *
	 * @param string $id Option ID.
	 * @return string|false
	 */
	protected function _conf_purge_tag( $id ) {
		$check_ids = [
			self::O_CACHE_PAGE_LOGIN => Tag::TYPE_LOGIN,
		];

if ( ! empty( $check_ids[ $id ] ) ) {
			return $check_ids[ $id ];
		}

return false;
	}

/**
	 * Generate server vars.
	 *
	 * @since 2.4.1
	 *
	 * @return array<string,mixed> Map of constant name => value|null.
	 */
	public function server_vars() {
		$consts      = [
			'WP_SITEURL',
			'WP_HOME',
			'WP_CONTENT_DIR',
			'SHORTINIT',
			'LSCWP_CONTENT_DIR',
			'LSCWP_CONTENT_FOLDER',
			'LSCWP_DIR',
			'LITESPEED_TIME_OFFSET',
			'LITESPEED_SERVER_TYPE',
			'LITESPEED_CLI',
			'LITESPEED_ALLOWED',
			'LITESPEED_ON',
			'LSWCP_TAG_PREFIX',
			'COOKIEHASH',
		];
		$server_vars = [];
		foreach ( $consts as $v ) {
			$server_vars[ $v ] = defined( $v ) ? constant( $v ) : null;
		}

return $server_vars;
	}
}