96 lines
2.1 KiB
JavaScript
96 lines
2.1 KiB
JavaScript
import { ajax } from "discourse/lib/ajax";
|
|
const _loaded = {};
|
|
const _loading = {};
|
|
|
|
function loadWithTag(path, cb) {
|
|
const head = document.getElementsByTagName("head")[0];
|
|
|
|
let finished = false;
|
|
let s = document.createElement("script");
|
|
s.src = path;
|
|
if (Ember.Test) {
|
|
Ember.Test.registerWaiter(() => finished);
|
|
}
|
|
|
|
s.onload = s.onreadystatechange = function(_, abort) {
|
|
finished = true;
|
|
if (
|
|
abort ||
|
|
!s.readyState ||
|
|
s.readyState === "loaded" ||
|
|
s.readyState === "complete"
|
|
) {
|
|
s = s.onload = s.onreadystatechange = null;
|
|
if (!abort) {
|
|
Ember.run(null, cb);
|
|
}
|
|
}
|
|
};
|
|
|
|
head.appendChild(s);
|
|
}
|
|
|
|
export function loadCSS(url) {
|
|
return loadScript(url, { css: true });
|
|
}
|
|
|
|
export default function loadScript(url, opts) {
|
|
// TODO: Remove this once plugins have been updated not to use it:
|
|
if (url === "defer/html-sanitizer-bundle") {
|
|
return Ember.RSVP.Promise.resolve();
|
|
}
|
|
|
|
opts = opts || {};
|
|
|
|
// Scripts should always load from CDN
|
|
// CSS is type text, to accept it from a CDN we would need to handle CORS
|
|
url = opts.css ? Discourse.getURL(url) : Discourse.getURLWithCDN(url);
|
|
|
|
$("script").each((i, tag) => {
|
|
const src = tag.getAttribute("src");
|
|
|
|
if (src && src !== url && !_loading[src]) {
|
|
_loaded[src] = true;
|
|
}
|
|
});
|
|
|
|
return new Ember.RSVP.Promise(function(resolve) {
|
|
// If we already loaded this url
|
|
if (_loaded[url]) {
|
|
return resolve();
|
|
}
|
|
if (_loading[url]) {
|
|
return _loading[url].then(resolve);
|
|
}
|
|
|
|
let done;
|
|
_loading[url] = new Ember.RSVP.Promise(function(_done) {
|
|
done = _done;
|
|
});
|
|
|
|
_loading[url].then(function() {
|
|
delete _loading[url];
|
|
});
|
|
|
|
const cb = function(data) {
|
|
if (opts && opts.css) {
|
|
$("head").append("<style>" + data + "</style>");
|
|
}
|
|
done();
|
|
resolve();
|
|
_loaded[url] = true;
|
|
};
|
|
|
|
if (opts.css) {
|
|
ajax({
|
|
url: url,
|
|
dataType: "text",
|
|
cache: true
|
|
}).then(cb);
|
|
} else {
|
|
// Always load JavaScript with script tag to avoid Content Security Policy inline violations
|
|
loadWithTag(url, cb);
|
|
}
|
|
});
|
|
}
|