48 lines
1.9 KiB
JavaScript
48 lines
1.9 KiB
JavaScript
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const electron = require('electron')
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const path = require('path')
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const fs = require('fs')
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class Store {
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constructor(opts) {
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// Renderer process has to get `app` module via `remote`, whereas the main process can get it directly
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// app.getPath('userData') will return a string of the user's app data directory path.
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const userDataPath = (electron.app || electron.remote.app).getPath('userData')
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// We'll use the `configName` property to set the file name and path.join to bring it all together as a string
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this.path = path.join(userDataPath, opts.configName + '.json')
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this.data = parseDataFile(this.path, opts.defaults)
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this.data = Object.assign(opts.defaults, this.data)
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}
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// This will just return the property on the `data` object
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get(key) {
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return this.data[key]
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}
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// ...and this will set it
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set(key, val) {
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this.data[key] = val
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// Wait, I thought using the node.js' synchronous APIs was bad form?
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// We're not writing a server so there's not nearly the same IO demand on the process
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// Also if we used an async API and our app was quit before the asynchronous write had a chance to complete,
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// we might lose that data. Note that in a real app, we would try/catch this.
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fs.writeFileSync(this.path, JSON.stringify(this.data))
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}
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}
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function parseDataFile(filePath, defaults) {
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// We'll try/catch it in case the file doesn't exist yet, which will be the case on the first application run.
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// `fs.readFileSync` will return a JSON string which we then parse into a Javascript object
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try {
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return JSON.parse(fs.readFileSync(filePath))
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} catch(error) {
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// if there was some kind of error, return the passed in defaults instead.
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return defaults
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}
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}
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// expose the class
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module.exports = Store
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