73 lines
1.7 KiB
TypeScript
73 lines
1.7 KiB
TypeScript
/**
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* @fileoverview
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* Core storage related APIs.
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*
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* @author mebjas <minhazav@gmail.com>
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*
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* The word "QR Code" is registered trademark of DENSO WAVE INCORPORATED
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* http://www.denso-wave.com/qrcode/faqpatent-e.html
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*/
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interface PersistedData {
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hasPermission: boolean;
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lastUsedCameraId: string | null;
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}
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class PersistedDataFactory {
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static createDefault(): PersistedData {
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return {
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hasPermission: false,
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lastUsedCameraId: null
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};
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}
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}
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export class PersistedDataManager {
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private data: PersistedData = PersistedDataFactory.createDefault();
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private static LOCAL_STORAGE_KEY: string = "HTML5_QRCODE_DATA";
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constructor() {
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let data = localStorage.getItem(PersistedDataManager.LOCAL_STORAGE_KEY);
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if (!data) {
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this.reset();
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} else {
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this.data = JSON.parse(data);
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}
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}
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public hasCameraPermissions(): boolean {
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return this.data.hasPermission;
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}
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public getLastUsedCameraId(): string | null {
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return this.data.lastUsedCameraId;
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}
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public setHasPermission(hasPermission: boolean) {
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this.data.hasPermission = hasPermission;
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this.flush();
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}
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public setLastUsedCameraId(lastUsedCameraId: string) {
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this.data.lastUsedCameraId = lastUsedCameraId;
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this.flush();
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}
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public resetLastUsedCameraId() {
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this.data.lastUsedCameraId = null;
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this.flush();
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}
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public reset() {
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this.data = PersistedDataFactory.createDefault();
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this.flush();
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}
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private flush(): void {
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localStorage.setItem(
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PersistedDataManager.LOCAL_STORAGE_KEY,
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JSON.stringify(this.data));
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}
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}
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