Preference Storage example

/* eslint-disable @typescript-eslint/no-explicit-any */

class PreferenceManager {
    private _preferences: Map<string, Preference>;

    constructor() {
        this._preferences = new Map();
        for (let i: number = 0; i <= localStorage.length; i++) {
            const key = localStorage.key(i);
            if (key != null && key.startsWith('preference_')) {
                this._preferences.set(key.replace('preference_', ''), Preference.load(key));
            }
        }
    }

    list() {
        const a = [];
        this._preferences.forEach((v, k) => {
            a.push({ name: k, value: v.value });
        });
        return a;
    }

    set(key: string, value: any) {
        const name = 'preference_' + key.replace('preference_', '');
        if (this.get(name) == null) {
            this._preferences.set(key, new Preference(name, value));
        }
    }

    get(key: string) {
        return this._preferences.get(key);
    }
}

class Preference {
    private _name: string;
    private _value: any;
    constructor(name: string, value: any) {
        this._name = 'preference_' + name.replace('preference_', '');
        this._value = value;
        this.save();
    }

    public static load(name: string) {
        const val = localStorage.getItem('preference_' + name.replace('preference_', ''));
        if (val != null) return new this(name, JSON.parse(val));
    }

    private save() {
        localStorage.removeItem(this._name);
        localStorage.setItem(this._name, JSON.stringify(this._value));
    }

    set value(value: any) {
        this._value = value;
        this.save();
    }

    get value() {
        return this._value;
    }
}

export default PreferenceManager;