65 lines
3.0 KiB
JavaScript
65 lines
3.0 KiB
JavaScript
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'use strict';
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var _createClass = function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }();
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function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
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function _possibleConstructorReturn(self, call) { if (!self) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return call && (typeof call === "object" || typeof call === "function") ? call : self; }
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function _inherits(subClass, superClass) { if (typeof superClass !== "function" && superClass !== null) { throw new TypeError("Super expression must either be null or a function, not " + typeof superClass); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, enumerable: false, writable: true, configurable: true } }); if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass; }
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// Not using async/await on purpose to avoid adding regenerator-runtime
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// to lowdb dependencies
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var fs = require('graceful-fs');
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var pify = require('pify');
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var steno = require('steno');
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var Base = require('./Base');
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var readFile = pify(fs.readFile);
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var writeFile = pify(steno.writeFile);
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var FileAsync = function (_Base) {
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_inherits(FileAsync, _Base);
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function FileAsync() {
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_classCallCheck(this, FileAsync);
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return _possibleConstructorReturn(this, (FileAsync.__proto__ || Object.getPrototypeOf(FileAsync)).apply(this, arguments));
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}
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_createClass(FileAsync, [{
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key: 'read',
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value: function read() {
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var _this2 = this;
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// fs.exists is deprecated but not fs.existsSync
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if (fs.existsSync(this.source)) {
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// Read database
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return readFile(this.source, 'utf-8').then(function (data) {
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// Handle blank file
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var trimmed = data.trim();
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return trimmed ? _this2.deserialize(trimmed) : _this2.defaultValue;
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}).catch(function (e) {
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if (e instanceof SyntaxError) {
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e.message = `Malformed JSON in file: ${_this2.source}\n${e.message}`;
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}
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throw e;
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});
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} else {
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// Initialize
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return writeFile(this.source, this.serialize(this.defaultValue)).then(function () {
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return _this2.defaultValue;
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});
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}
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}
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}, {
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key: 'write',
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value: function write(data) {
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return writeFile(this.source, this.serialize(data));
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}
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}]);
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return FileAsync;
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}(Base);
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module.exports = FileAsync;
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