<?php
/**
 * Created by ra.
 * Date: 7/18/2016
 */


class td_analyze_css_css_storage {


	private static $is_shutdown_hooked = false;
	private static $is_local_storage_read = false; // true if we read the loacal storage form db


	private static $local_storage = array();


	static function update($less_or_css, $new_value) {
		// read the cache from db if needed
		self::read_local_storage();


		if (empty($new_value)) {

			if (isset(self::$local_storage)) {
				//echo 'rarara';

				// unset the key
				if (isset(self::$local_storage[$less_or_css])) {
					unset(self::$local_storage[$less_or_css]);
				}

				// double check to see if we have empty keys
				if (empty(self::$local_storage['less']) && empty(self::$local_storage['css'])) {
					self::$local_storage = null;
					//unset (self::$local_storage);
				}
			}


		} else {
			self::$local_storage[$less_or_css] = $new_value;
		}





		// make sure that we hook only once
		if (self::$is_shutdown_hooked === false) {
			add_action('shutdown', array(__CLASS__, 'on_shutdown_save_log'));
			self::$is_shutdown_hooked = true;
		}
	}


	static function get($less_or_css) {
		// read the cache from db if needed
		self::read_local_storage();


		if (!empty(self::$local_storage[$less_or_css])) {
			return self::$local_storage[$less_or_css];
		}

		return '';
	}





	private static function read_local_storage() {
		if (self::$is_local_storage_read === false) {
			self::$local_storage = (array)get_option('td_analyze_css_local_storage');
			self::$is_local_storage_read = true;
		}
	}



	// save the log if needed
	static function on_shutdown_save_log() {
		update_option('td_analyze_css_local_storage', self::$local_storage);
	}
}