55 lines
1.7 KiB
TypeScript
55 lines
1.7 KiB
TypeScript
import { throttle } from "lodash";
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import type { GlobalSettings } from "../interface";
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import { BasicEventEmitter } from "../utils/eventEmitter";
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import { A4_HEIGHT, A4_WIDTH } from "../constants";
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function defaultGlobalSetting(): GlobalSettings {
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return {
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DPI: 96,
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scale: 1,
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paperHeight: A4_HEIGHT,
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paperWidth: A4_WIDTH,
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grid: "none",
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landscape: false,
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};
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}
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export class GlobalSettingsHandler {
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private STORAGE_SETTINGS_KEY = "settings";
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public readonly emitter = new BasicEventEmitter<{
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"settings-update": [];
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}>();
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private _settings: GlobalSettings = defaultGlobalSetting();
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private store!: LocalForage;
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async init(store: LocalForage) {
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this.store = store;
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this._settings = (await this.store.getItem<GlobalSettings>(this.STORAGE_SETTINGS_KEY)) || this._settings;
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}
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setSettings(settings: Partial<GlobalSettings>) {
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const entries = Object.entries(settings);
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let emitUpdate = false;
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for (const [key, value] of entries) {
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const diff = (this._settings as any)[key] !== value;
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(this._settings as any)[key] = value;
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if (diff) {
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emitUpdate = true;
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}
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}
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if (emitUpdate) {
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this.emitter.emit("settings-update");
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this.save();
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}
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}
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async clear() {
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this._settings = defaultGlobalSetting();
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await this.store.setItem(this.STORAGE_SETTINGS_KEY, this._settings);
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}
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get settings() {
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return { ...this._settings };
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}
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private save = throttle(async () => {
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await this.store.setItem(this.STORAGE_SETTINGS_KEY, this._settings);
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}, 1000);
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}
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