ConfigManager

ConfigManager: Manage(Get, set and update) your config with config path simply with a ruleset!
目前為 2022-08-25 提交的版本，檢視最新版本。
此腳本不應該直接安裝，它是一個供其他腳本使用的函式庫。欲使用本函式庫，請在腳本 metadata 寫上： // @require https://update.gf.qytechs.cn/scripts/449583/1085356/ConfigManager.js
發表問題、評論、或檢舉該腳本。
Wrap lines
/* eslint-disable no-multi-spaces */
 
// ==UserScript==
// @name               ConfigManager
// @namespace          ConfigManager
// @version            0.4.1
// @description        ConfigManager: Manage(Get, set and update) your config with config path simply with a ruleset!
// @author             PY-DNG
// @license            GPL-v3
// @grant              GM_setValue
// @grant              GM_getValue
// @grant              GM_listValues
// @grant              GM_deleteValue
// ==/UserScript==
 
function ConfigManager(Ruleset, storage={}) {
	const CM = this;
	const _GM_setValue = storage.GM_setValue || GM_setValue || Err('ConfigManager: could not find GM_setValue');
	const _GM_getValue = storage.GM_getValue || GM_getValue || Err('ConfigManager: could not find GM_getValue');
	const _GM_listValues = storage.GM_listValues || GM_listValues || Err('ConfigManager: could not find GM_listValues');
	const _GM_deleteValue = storage.GM_deleteValue || GM_deleteValue || Err('ConfigManager: could not find GM_deleteValue');
	const ConfigBase = new Proxy({}, {
		get: function(target, property, reciever) {
			return _GM_getValue(property);
		},
		set: function(target, property, value, reciever) {
			return (_GM_setValue(property, value), true);
		},
		has: function(target, property) {
			return _GM_listValues().includes(property);
		}
	});
 
	CM.getConfig = getConfig;
	CM.setConfig = setConfig;
	CM.updateConfig = updateConfig;
	CM.updateAllConfigs = updateAllConfigs;
	CM.readPath = readPath;
	CM.pathExists = pathExists;
	CM.mergePath = mergePath;
	CM.getBaseName = getBaseName;
	CM.Config = new Proxy({}, {
		get: function(target, property, reciever) {
			return makeProxy(_GM_getValue(property), [property]);
 
			function makeProxy(config, path) {
				return isObject(config) ? new Proxy(config, {
					get: function(target, property, reciever) {
						path.push(property);
						return makeProxy(target[property], path);
					},
					set: function(target, property, value, reciever) {
						path.push(property);
						return (setConfig(path, value), true);
					}
				}) : config;
			}
		},
		set: function(target, property, value, reciever) {
			return (_GM_setValue(property, value), true);
		},
		has: function(target, property) {
			return _GM_listValues().includes(property);
		}
	});
	Object.freeze(CM);
 
	// Get config value from path (e.g. 'Users/username/' or ['Users', 12345])
	function getConfig(path) {
		// Split path
		path = arrPath(path);
 
		// Init config if need
		if (!_GM_listValues().includes(path[0])) {
			ConfigBase[path[0]] = Ruleset.defaultValues[path[0]];
		}
 
		// Get config by path
		const target = path.pop();
		let config = readPath(ConfigBase, path);
		return config[target];
	}
 
	// Set config value to path
	function setConfig(path, value) {
		path = arrPath(path);
		const target = path.pop();
 
		if (path.length > 0) {
			const basekey = path.shift();
			const baseobj = ConfigBase[basekey];
			let config = readPath(baseobj, path);
			if (isObject(config)) {
				config[target] = value;
				ConfigBase[basekey] = baseobj;
			} else {
				Err('Attempt to set a property to a non-object value')
			}
		} else {
			ConfigBase[target] = value;
		}
	}
 
	function updateConfig(basename) {
		let updated = false;
 
		// Get updaters and config
		const updaters = Ruleset.updaters.hasOwnProperty(basename) ? Ruleset.updaters[basename] : [];
		const verKey = Ruleset['version-key'];
		const config = getConfig(basename);
 
		// Valid check
		if (Ruleset.ignores.includes(basename)) {
			return false;
		}
		if (!updaters.length) {
			return save();
		}
 
		// Update
		for (let i = (config[verKey] || 0); i < updaters.length; i++) {
			const updater = updaters[i];
			config = updater(config);
			updated = true;
		}
 
		// Set version and save
		return save();
 
		function save() {
			config[verKey] = updaters.length;
			setConfig(basename, config);
			return updated;
		}
	}
 
	function updateAllConfigs() {
		const keys = _GM_listValues();
		keys.forEach((key) => (updateConfig(key)));
	}
 
	function readPath(obj, path) {
		path = arrPath(path);
		while (path.length > 0) {
			const key = path.shift();
			if (isObject(obj) && hasProp(obj, key)) {
				obj = obj[key]
			} else {
				Err('Attempt to read a property that is not exist (reading "' + key + '" in path "' + path + '")')
			}
		}
		return obj;
	}
 
	function pathExists(obj, path) {
		path = arrPath(path);
		while (path.length > 0) {
			const key = path.shift();
			if (isObject(obj) && hasProp(obj, key)) {
				obj = obj[key];
			} else {
				return false;
			}
		}
		return true;
	}
 
	function mergePath() {
		return Array.from(arguments).join('/');
	}
 
	function getBaseName(path) {
		return arrPath(path)[0];
	}
 
	function getPathWithoutBase(path) {
		const p = arrPath(path);
		p.shift();
		return p;
	}
 
	function arrPath(strpath) {
		return Array.isArray(strpath) ? [...strpath] : strpath.split('/');
	}
 
	function isObject(obj) {
		return typeof obj === 'object' && obj !== null;
	}
 
	function hasProp(obj, prop) {
		return obj === ConfigBase ? prop in obj : obj.hasOwnProperty(prop);
	}
 
	// type: [Error, TypeError]
	function Err(msg, type=0) {
		throw new [Error, TypeError][type](msg);
	}
}
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