first publish

src/index.ts

@@ -0,0 +1,57 @@
+import { readFileSync, writeFileSync, lstatSync } from 'fs'
+import { resolve } from 'path'
+import yaml from 'yaml'
+
+type AllowedYamlTypes = string | number | boolean
+type AllowedTypes = AllowedYamlTypes | AllowedYamlTypes[]
+
+export default class Memento {
+	private readonly file: string
+	private state: any
+
+	constructor(file: string) {
+		this.file = resolve(file)
+		try {
+			this.read()
+		} catch (e) {
+			this.state = {}
+			this.save()
+		}
+	}
+
+	public get<AllowedTypes>(setting: string, defaultValue: AllowedTypes | undefined = undefined): AllowedTypes {
+		const props = setting.split('.')
+		let root = this.state
+		try {
+			for (const prop of props)
+				root = root[prop]
+		} catch (e) {
+		}
+		if (root) return root
+		if (defaultValue) {
+			// @ts-ignore
+			this.set(setting, defaultValue)
+			return defaultValue
+		}
+		throw new Error('Could not load the setting')
+	}
+
+	public set(setting: string, value: AllowedTypes): void {
+		const props = setting.split('.')
+		let root = this.state
+		for (const prop of props.slice(0, -1)) {
+			if (typeof root[prop] !== 'object') root[prop] = {}
+			root = root[prop]
+		}
+		root[props[props.length - 1]] = value
+		this.save()
+	}
+
+	private read() {
+		this.state = yaml.parse(readFileSync(this.file, 'utf-8'))
+	}
+
+	private save() {
+		writeFileSync(this.file, yaml.stringify(this.state), 'utf-8')
+	}
+}