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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
window.MozXULElement?.insertFTLIfNeeded("toolkit/global/mozSupportLink.ftl");
/**
* An extension of the anchor element that helps create links to Mozilla's
* support documentation. This should be used for SUMO links only - other "Learn
* more" links can use the regular anchor element.
*
* @tagname moz-support-link
* @attribute {string} support-page - Short-hand string from SUMO to the specific support page.
* @attribute {string} utm-content - UTM parameter for a URL, if it is an AMO URL.
* @attribute {string} data-l10n-id - Fluent ID used to generate the text content.
*/
export default class MozSupportLink extends HTMLAnchorElement {
static SUPPORT_URL = "https://www.mozilla.org/";
static get observedAttributes() {
return ["support-page", "utm-content"];
}
/**
* Handles setting up the SUPPORT_URL preference getter.
* Without this, the tests for this component may not behave
* as expected.
* @private
* @memberof MozSupportLink
*/
#register() {
if (window.document.nodePrincipal?.isSystemPrincipal) {
// eslint-disable-next-line no-shadow
let { XPCOMUtils } = window.XPCOMUtils
? window
: ChromeUtils.importESModule(
"resource://gre/modules/XPCOMUtils.sys.mjs"
);
XPCOMUtils.defineLazyPreferenceGetter(
MozSupportLink,
"SUPPORT_URL",
"app.support.baseURL",
"",
null,
val => Services.urlFormatter.formatURL(val)
);
} else if (!window.IS_STORYBOOK) {
MozSupportLink.SUPPORT_URL = window.RPMGetFormatURLPref(
"app.support.baseURL"
);
}
}
connectedCallback() {
this.#register();
this.#setHref();
this.setAttribute("target", "_blank");
this.addEventListener("click", this);
if (
!this.getAttribute("data-l10n-id") &&
!this.getAttribute("data-l10n-name") &&
!this.childElementCount
) {
document.l10n.setAttributes(this, "moz-support-link-text");
}
document.l10n.translateFragment(this);
}
disconnectedCallback() {
this.removeEventListener("click", this);
}
handleEvent(e) {
if (e.type == "click") {
if (window.openTrustedLinkIn) {
let where = whereToOpenLink(e, false, true);
if (where == "current") {
where = "tab";
}
e.preventDefault();
openTrustedLinkIn(this.href, where);
}
}
}
attributeChangedCallback(attrName) {
if (attrName === "support-page" || attrName === "utm-content") {
this.#setHref();
}
}
#setHref() {
let supportPage = this.getAttribute("support-page") ?? "";
let base = MozSupportLink.SUPPORT_URL + supportPage;
this.href = this.hasAttribute("utm-content")
? formatUTMParams(this.getAttribute("utm-content"), base)
: base;
}
}
customElements.define("moz-support-link", MozSupportLink, { extends: "a" });
/**
* Adds UTM parameters to a given URL, if it is an AMO URL.
*
* @param {string} contentAttribute
* Identifies the part of the UI with which the link is associated.
* @param {string} url
* @returns {string}
* The url with UTM parameters if it is an AMO URL.
* Otherwise the url in unmodified form.
*/
export function formatUTMParams(contentAttribute, url) {
if (!contentAttribute) {
return url;
}
let parsedUrl = new URL(url);
let domain = `.${parsedUrl.hostname}`;
if (
!domain.endsWith(".mozilla.org") &&
// For testing: addons-dev.allizom.org and addons.allizom.org
!domain.endsWith(".allizom.org")
) {
return url;
}
parsedUrl.searchParams.set("utm_source", "firefox-browser");
parsedUrl.searchParams.set("utm_medium", "firefox-browser");
parsedUrl.searchParams.set("utm_content", contentAttribute);
return parsedUrl.href;
}
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