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import { Inject, Injectable, TransferState } from '@angular/core';
import { COOKIE_CONSENT_OPTIONS } from 'ish-core/configurations/injection-keys';
import { COOKIE_CONSENT_VERSION } from 'ish-core/configurations/state-keys';
import { CookieConsentSettings } from 'ish-core/models/cookies/cookies.model';
import { browserNameVersion } from 'ish-core/utils/browser-detection';
import { InjectSingle } from 'ish-core/utils/injection';
interface CookiesOptions {
path?: string;
domain?: string;
expires?: string | Date;
secure?: boolean;
httpOnly?: boolean;
sameSite?: 'Lax' | 'Strict' | 'None';
}
/**
* The Cookies Service handles any interaction of the PWA with cookies.
* Implementation is mostly transferred from the 'ngx-utils-cookies-port' library (https://github.com/junekpavel/ngx-utils-cookies-port).
* in addition it provides methods for the cookie consent handling.
*/
@Injectable({ providedIn: 'root' })
export class CookiesService {
constructor(
@Inject(COOKIE_CONSENT_OPTIONS) private cookieConsentOptions: InjectSingle<typeof COOKIE_CONSENT_OPTIONS>,
private transferState: TransferState,
@Inject(APP_BASE_HREF) private baseHref: string,
@Inject(DOCUMENT) private document: Document
) {}
get(key: string): string {
return !SSR ? (this.cookiesReader()[key] as string) : undefined;
}
remove(key: string, options?: CookiesOptions) {
if (!SSR) {
this.cookiesWriter()(key, undefined, options);
}
}
put(key: string, value: string, options?: CookiesOptions) {
if (!SSR) {
this.cookiesWriter()(key, value, options);
}
}
/**
* Saves the given cookie consent options settings together with the current cookie consent version
* to a users cookie named 'cookieConsent' and reloads the PWA application with the new settings.
*
* @param options The selected cookie consent options that should be enabled.
*/
setCookiesConsentFor(options: string[]) {
const cookieConsentVersion = this.transferState.get<number>(COOKIE_CONSENT_VERSION, 1);
this.deleteAllCookies();
this.put('cookieConsent', JSON.stringify({ enabledOptions: options, version: cookieConsentVersion }), {
expires: new Date(new Date().setFullYear(new Date().getFullYear() + 1)),
});
window.location.reload();
}
setCookiesConsentForAll() {
this.setCookiesConsentFor(Object.keys(this.cookieConsentOptions.options));
}
/**
* Check if consent was given for {option}.
*
* @param option The cookie consent option of interest.
* @returns 'true' if the user has given the consent for the requested option, 'false' otherwise.
*/
cookieConsentFor(option: string): boolean {
if (!SSR) {
const cookieConsentSettings = JSON.parse(this.get('cookieConsent') || 'null') as CookieConsentSettings;
return cookieConsentSettings?.enabledOptions ? cookieConsentSettings.enabledOptions.includes(option) : false;
} else {
return false;
}
}
/**
* Deletes all cookies except for the ones configured as 'allowedCookies' in the environments cookie consent options.
*/
private deleteAllCookies() {
const allCookies = this.cookiesReader();
for (const cookie in allCookies) {
Iif (!this.cookieConsentOptions?.allowedCookies.includes(cookie)) {
this.cookiesWriter()(cookie, undefined);
}
}
}
private cookiesReader(): { [key: string]: unknown } {
let lastCookies: { [key: string]: unknown } = {};
let lastCookieString = '';
let cookiesArray: string[];
let cookie: string;
let i: number;
let index: number;
let name: string;
const currentCookieString = this.document.cookie || '';
if (currentCookieString !== lastCookieString) {
lastCookieString = currentCookieString;
cookiesArray = lastCookieString.split('; ');
lastCookies = {};
for (i = 0; i < cookiesArray.length; i++) {
cookie = cookiesArray[i];
index = cookie.indexOf('=');
if (index > 0) {
name = decodeURIComponent(cookie.substring(0, index));
if (!lastCookies[name]) {
const cookieValue = decodeURIComponent(cookie.substring(index + 1));
if (cookieValue) {
lastCookies[name] = cookieValue;
}
}
}
}
}
return lastCookies;
}
private cookiesWriter(): (name: string, value: string | undefined, options?: CookiesOptions) => void {
return (name, value, options?) => {
this.document.cookie = this.buildCookieString(name, value, options);
};
}
// eslint-disable-next-line complexity
private buildCookieString(name: string, value: string | undefined, opts: CookiesOptions = {}): string {
let path = opts.path;
if (!path) {
path = this.baseHref;
}
let expires = opts.expires;
if (!value) {
expires = 'Thu, 01 Jan 1970 00:00:00 GMT';
}
if (typeof expires === 'string') {
expires = new Date(expires);
}
// fix for Safari 14 not keeping 'SameSite=Strict' cookies when redirecting to a payment provider etc.
Iif (browserNameVersion() === 'Safari 14' && opts.sameSite !== 'None') {
opts.sameSite = 'Lax';
}
let str = `${encodeURIComponent(name)}=${encodeURIComponent(value || '')}`;
str += `;path=${path}`;
str += opts.domain ? `;domain=${opts.domain}` : '';
str += expires ? `;expires=${expires.toUTCString()}` : '';
// if in an iframe set cookies always with SameSite=None, otherwise set the given SameSite, default to SameSite=Strict
str += `;SameSite=${window.parent !== window ? 'None' : opts.sameSite || 'Strict'}`;
// if in http mode (should only be in development) or if explicitly set to false do not set the cookie secure, default to secure
// eslint-disable-next-line @typescript-eslint/no-unnecessary-boolean-literal-compare
str += window.location.protocol === 'http:' || opts.secure === false ? '' : ';secure';
const cookiesLength = str.length + 1;
Iif (cookiesLength > 4096) {
// eslint-disable-next-line no-console
console.log(`Cookie \'${name}\' possibly not set or overflowed because it was too
large (${cookiesLength} > 4096 bytes)!`);
}
return str;
}
}
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