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Persistent Storage

Useful library for dealing with the storage.

此脚本不应直接安装，它是一个供其他脚本使用的外部库。如果您需要使用该库，请在脚本元属性加入：// @require https://update.cn-greasyfork.org/scripts/476018/1255634/Persistent%20Storage.js 

  1. // ==UserScript==
  2. // @name Persistent Storage
  3. // @namespace https://rafaelgssa.gitlab.io/monkey-scripts
  4. // @version 3.0.2
  5. // @author rafaelgssa
  6. // @description Useful library for dealing with the storage.
  7. // @match *://*/*
  8. // @require https://greasemonkey.github.io/gm4-polyfill/gm4-polyfill.js
  9. // @require https://greasyfork.org/scripts/405813-monkey-utils/code/Monkey%20Utils.js
  10. // @grant GM_setValue
  11. // @grant GM_getValue
  12. // @grant GM_deleteValue
  13. // @grant GM_setValue
  14. // @grant GM_getValue
  15. // @grant GM_deleteValue
  16. // ==/UserScript==
  17.  
  18. /* global Utils */
  19.  
  20. /**
  21.  * @typedef {Record<string, unknown> & StorageValuesBase} StorageValues
  22.  *
  23.  * @typedef {Object} StorageValuesBase
  24.  * @property {Record<string, unknown>} settings
  25.  */
  26.  
  27. // eslint-disable-next-line
  28. const PersistentStorage = (() => {
  29. 	let _id = '';
  30.  
  31. 	const _defaultValues = /** @type {StorageValues} */ ({
  32. 		settings: {},
  33. 	});
  34.  
  35. 	const _cache = /** @type {StorageValues} */ ({
  36. 		settings: {},
  37. 	});
  38.  
  39. 	/**
  40. 	 * Initializes the storage.
  41. 	 * @param {string} id The ID to use for the local storage.
  42. 	 * @param {Partial<StorageValues>} [defaultValues] Any default values to set.
  43. 	 * @returns {Promise<void>}
  44. 	 */
  45. 	const init = (id, defaultValues) => {
  46. 		_id = id;
  47. 		if (defaultValues) {
  48. 			for (const [key, value] of Object.entries(defaultValues)) {
  49. 				setDefaultValue(key, value);
  50. 			}
  51. 		}
  52. 		return _updateCache('settings');
  53. 	};
  54.  
  55. 	/**
  56. 	 * Sets a default value.
  57. 	 * @param {string} key The key of the default value to set.
  58. 	 * @param {unknown} value The default value to set.
  59. 	 */
  60. 	const setDefaultValue = (key, value) => {
  61. 		_defaultValues[key] = value;
  62. 	};
  63.  
  64. 	/**
  65. 	 * Sets a value in the storage.
  66. 	 * @param {string} key The key of the value to set.
  67. 	 * @param {unknown} value The value to set.
  68. 	 * @returns {Promise<void>}
  69. 	 */
  70. 	const setValue = (key, value) => {
  71. 		const stringifiedValue = JSON.stringify(value);
  72. 		GM_setValue(key, stringifiedValue);
  73. 		_cache[key] = value;
  74. 	};
  75.  
  76. 	/**
  77. 	 * Gets a value from the cache.
  78. 	 * @param {string} key The key of the value to get.
  79. 	 * @param {boolean} [updateCache] Whether to update the cache with the storage or not.
  80. 	 * @returns {Promise<unknown>} The value.
  81. 	 */
  82. 	const getValue = (key, updateCache = false) => {
  83. 		if (!Utils.isSet(_cache[key]) || updateCache) {
  84. 			_updateCache(key);
  85. 		}
  86. 		return _cache[key];
  87. 	};
  88.  
  89. 	/**
  90. 	 * Updates a value in the cache with the storage.
  91. 	 * @param {string} key The key of the value to update.
  92. 	 * @returns {Promise<void>}
  93. 	 */
  94. 	const _updateCache = (key) => {
  95. 		let value = GM_getValue(key);
  96. 		if (typeof value === 'string') {
  97. 			try {
  98. 				value = JSON.parse(value);
  99. 			} catch (err) {
  100. 				// Value is already parsed, just ignore.
  101. 			}
  102. 		}
  103. 		_cache[key] = Utils.isSet(value) ? value : _defaultValues[key];
  104. 	};
  105.  
  106. 	/**
  107. 	 * Deletes a value from the storage.
  108. 	 * @param {string} key The key of the value to delete.
  109. 	 * @returns {Promise<void>}
  110. 	 */
  111. 	const deleteValue = (key) => {
  112. 		GM_deleteValue(key);
  113. 		delete _cache[key];
  114. 	};
  115.  
  116. 	/**
  117. 	 * Sets a value in the local storage.
  118. 	 * @param {string} key The key of the value to set.
  119. 	 * @param {unknown} value The value to set.
  120. 	 */
  121. 	const setLocalValue = (key, value) => {
  122. 		const stringifiedValue = JSON.stringify(value);
  123. 		window.localStorage.setItem(`${_id}_${key}`, stringifiedValue);
  124. 		_cache[key] = value;
  125. 	};
  126.  
  127. 	/**
  128. 	 * Gets a value from the cache.
  129. 	 * @param {string} key The key of the value to get.
  130. 	 * @param {boolean} [updateCache] Whether to update the cache with the local storage or not.
  131. 	 * @returns {unknown} The value.
  132. 	 */
  133. 	const getLocalValue = (key, updateCache = false) => {
  134. 		if (!Utils.isSet(_cache[key]) || updateCache) {
  135. 			_updateLocalCache(key);
  136. 		}
  137. 		return _cache[key];
  138. 	};
  139.  
  140. 	/**
  141. 	 * Updates a value in the cache with the local storage.
  142. 	 * @param {string} key The key of the value to update.
  143. 	 */
  144. 	const _updateLocalCache = (key) => {
  145. 		let value = window.localStorage.getItem(`${_id}_${key}`);
  146. 		if (typeof value === 'string') {
  147. 			try {
  148. 				value = JSON.parse(value);
  149. 			} catch (err) {
  150. 				// Value is already parsed, just ignore.
  151. 			}
  152. 		}
  153. 		_cache[key] = Utils.isSet(value) ? value : _defaultValues[key];
  154. 	};
  155.  
  156. 	/**
  157. 	 * Deletes a value from the local storage.
  158. 	 * @param {string} key The key of the value to delete.
  159. 	 */
  160. 	const deleteLocalValue = (key) => {
  161. 		window.localStorage.removeItem(`${_id}_${key}`);
  162. 		delete _cache[key];
  163. 	};
  164.  
  165. 	/**
  166. 	 * Sets a default setting.
  167. 	 * @param {string} key The key of the default setting to set.
  168. 	 * @param {unknown} setting The default setting to set.
  169. 	 */
  170. 	const setDefaultSetting = (key, setting) => {
  171. 		_defaultValues.settings[key] = setting;
  172. 	};
  173.  
  174. 	/**
  175. 	 * Sets a setting in the cache.
  176. 	 * @param {string} key The key of the setting to set.
  177. 	 * @param {unknown} setting The setting to set.
  178. 	 */
  179. 	const setSetting = (key, setting) => {
  180. 		_cache.settings[key] = setting;
  181. 	};
  182.  
  183. 	/**
  184. 	 * Gets a setting from the cache.
  185. 	 * @param {string} key The key of the setting to get.
  186. 	 * @param {boolean} [updateCache] Whether to update the settings cache with the storage or not.
  187. 	 * @returns {Promise<unknown>} The setting.
  188. 	 */
  189. 	const getSetting = (key, updateCache = false) => {
  190. 		if (isSettingsEmpty() || !Utils.isSet(_cache.settings[key]) || updateCache) {
  191. 			_updateCache('settings');
  192. 		}
  193. 		return _cache.settings[key];
  194. 	};
  195.  
  196. 	/**
  197. 	 * Deletes a setting from the cache.
  198. 	 * @param {string} key The key of the setting to delete.
  199. 	 */
  200. 	const deleteSetting = (key) => {
  201. 		delete _cache.settings[key];
  202. 	};
  203.  
  204. 	/**
  205. 	 * Saves the settings from the cache.
  206. 	 * @returns {Promise<void>}
  207. 	 */
  208. 	const saveSettings = () => {
  209. 		return setValue('settings', _cache.settings);
  210. 	};
  211.  
  212. 	/**
  213. 	 * Checks if the settings cache is empty.
  214. 	 * @returns {boolean} Whether the settings cache is empty or not.
  215. 	 */
  216. 	const isSettingsEmpty = () => {
  217. 		return Object.keys(_cache.settings).length === 0;
  218. 	};
  219.  
  220. 	return {
  221. 		init,
  222. 		setDefaultValue,
  223. 		setValue,
  224. 		getValue,
  225. 		deleteValue,
  226. 		setLocalValue,
  227. 		getLocalValue,
  228. 		deleteLocalValue,
  229. 		setDefaultSetting,
  230. 		setSetting,
  231. 		getSetting,
  232. 		deleteSetting,
  233. 		saveSettings,
  234. 		isSettingsEmpty,
  235. 	};
  236. })();