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84 lines
1.9 KiB
JavaScript
84 lines
1.9 KiB
JavaScript
'use strict';
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const itype = require('itype/legacy');
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const jonny = require('jonny');
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const exec = require('execon');
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/* приватный переключатель возможности работы с кэшем */
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let Allowed;
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/**
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* allow Storage usage
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*/
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module.exports.setAllowed = (isAllowed) => {
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Allowed = isAllowed;
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};
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/** remove element */
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module.exports.remove = (item, callback) => {
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if (Allowed)
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localStorage.removeItem(item);
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exec(callback, null, Allowed);
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return module.exports;
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};
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module.exports.removeMatch = (string, callback) => {
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const reg = RegExp('^' + string + '.*$');
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const test = (a) => reg.test(a);
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const remove = (a) => localStorage.removeItem(a);
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Object.keys(localStorage)
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.filter(test)
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.forEach(remove);
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exec(callback);
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return module.exports;
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};
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/** если доступен localStorage и
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* в нём есть нужная нам директория -
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* записываем данные в него
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*/
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module.exports.set = (name, data, callback) => {
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let str, error;
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if (itype.object(data))
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str = jonny.stringify(data);
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if (Allowed && name)
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error = exec.try(() => {
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localStorage.setItem(name, str || data);
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});
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exec(callback, error);
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return module.exports;
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},
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/** Если доступен Storage принимаем из него данные*/
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module.exports.get = (name, callback) => {
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let ret;
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if (Allowed)
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ret = localStorage.getItem(name);
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exec(callback, null, ret);
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return module.exports;
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},
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/** функция чистит весь кэш для всех каталогов*/
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module.exports.clear = (callback) => {
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const ret = Allowed;
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if (ret)
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localStorage.clear();
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exec(callback, null, ret);
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return module.exports;
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};
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