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import React from 'dom-chef';
import cache from 'webext-storage-cache';
import select from 'select-dom';
import pFilter from 'p-filter';
import onetime from 'onetime';
import features from '../libs/features';
import {isRepoWithAccess} from '../libs/page-detect';
import {getRepoURL, getUsername} from '../libs/utils';
const getCacheKey = onetime((): string => `forked-to:${getUsername()}@${findForkedRepo() || getRepoURL()}`);
async function save(forks: string[]): Promise<void> {
if (forks.length === 0) {
return cache.delete(getCacheKey());
}
return cache.set(getCacheKey(), forks, 10);
}
function saveAllForks(): void {
const forks = select
.all('details-dialog[src*="/fork"] .octicon-repo-forked')
.map(({nextSibling}) => nextSibling!.textContent!.trim());
save(forks);
}
function findForkedRepo(): string | undefined {
const forkSourceElement = select<HTMLAnchorElement>('.fork-flag:not(.rgh-forked) a');
if (forkSourceElement) {
return forkSourceElement.pathname.slice(1);
}
return undefined;
}
async function validateFork(repo: string): Promise<boolean> {
const response = await fetch(location.origin + '/' + repo, {method: 'HEAD'});
return response.ok;
}
async function updateForks(forks: string[]): Promise<void> {
// Don't validate current page: it exists; it won't be shown in the list; it will be added later anyway
const validForks = await pFilter(forks.filter(fork => fork !== getRepoURL()), validateFork);
// Add current repo to cache if it's a fork
if (isRepoWithAccess() && findForkedRepo()) {
save([...validForks, getRepoURL()].sort(undefined));
} else {
save(validForks);
}
}
async function init(): Promise<void> {
select('details-dialog[src*="/fork"] include-fragment')!
.addEventListener('load', saveAllForks);
const forks = await cache.get<string[]>(getCacheKey());
if (forks) {
const pageHeader = select('.pagehead h1.public')!;
for (const fork of forks.filter(fork => fork !== getRepoURL())) {
pageHeader.append(
<span className="fork-flag rgh-forked">
forked to <a href={`/${fork}`}>{fork}</a>
</span>
);
}
}
// Validate cache after showing links once, to make it faster
await updateForks(forks || []);
}
features.add({
id: __featureName__,
description: 'Your repo forks are shown under the repo title',
screenshot: 'https://user-images.githubusercontent.com/55841/60543588-f5c9df80-9d16-11e9-8667-52ff16b2cb16.png',
include: [
features.isRepo
],
load: features.onAjaxedPages,
init
});
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