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import React from 'dom-chef';
import select from 'select-dom';
import tinyVersionCompare from 'tiny-version-compare';
import features from '../libs/features';
import fetchDom from '../libs/fetch-dom';
import * as icons from '../libs/icons';
import {isSingleTagPage} from '../libs/page-detect';
import {getRepoPath, getRepoURL, parseTag} from '../libs/utils';
type TagDetails = {
element: HTMLElement;
commit: string;
tag: string;
version: string;
namespace: string;
};
async function getNextPage(): Promise<DocumentFragment> {
const nextPageLink = select<HTMLAnchorElement>('.pagination a:last-child');
if (nextPageLink) {
return fetchDom(nextPageLink.href);
}
if (isSingleTagPage()) {
const [, tag = ''] = getRepoPath()!.split('releases/tag/', 2); // Already URL-encoded
return fetchDom(`/${getRepoURL()}/tags?after=${tag}`);
}
return new DocumentFragment();
}
function parseTags(element: HTMLElement): TagDetails {
const {pathname: tagUrl} = select<HTMLAnchorElement>('[href*="/releases/tag/"]', element)!;
const tag = /\/releases\/tag\/(.*)/.exec(tagUrl)![1];
return {
element,
tag,
commit: select('[href*="/commit/"]', element)!.textContent!.trim(),
...parseTag(decodeURIComponent(tag)) // `version`, `namespace`
};
}
async function init(): Promise<void | false> {
if (select.exists('.blankslate')) {
return false;
}
const tagsSelectors = [
// https://github.com/facebook/react/releases (release in releases list)
'.release',
// https://github.com/facebook/react/releases?after=v16.7.0 (tags in releases list)
'.release-main-section .commit',
// https://github.com/facebook/react/tags (tags list)
'.Box-row .commit'
].join();
// Look for tags in the current page and the next page
const pages = [document, await getNextPage()];
const allTags = select.all(tagsSelectors, pages).map(parseTags);
for (const [index, container] of allTags.entries()) {
const previousTag = getPreviousTag(index, allTags);
if (previousTag) {
// Signed releases include on mobile include a "Verified" <details> inside the `ul`. `li:last-of-type` excludes it.
// Example: https://github.com/tensorflow/tensorflow/releases?after=v1.12.0-rc1
for (const lastLink of select.all('.list-style-none > li:last-of-type', container.element)) {
lastLink.after(
<li className={lastLink.className}>
<a
className="muted-link tooltipped tooltipped-n"
aria-label={'See changes since ' + decodeURIComponent(previousTag)}
href={`/${getRepoURL()}/compare/${previousTag}...${allTags[index].tag}`}
>
{icons.diff()} Changelog
</a>
</li>
);
// `lastLink` is no longer the last link, so it shouldn't push our new link away.
// Same page as before: https://github.com/tensorflow/tensorflow/releases?after=v1.12.0-rc1
lastLink.classList.remove('flex-auto');
}
}
}
}
const getPreviousTag = (current: number, allTags: TagDetails[]): string | undefined => {
let unmatchedNamespaceTag: string | undefined;
for (let next = current + 1; next < allTags.length; next++) {
// Find a version on a different commit, if there are multiple tags on the same one
if (allTags[next].commit === allTags[current].commit) {
continue;
}
// Find an earlier version
if (tinyVersionCompare(allTags[current].version, allTags[next].version) < 1) {
continue;
}
if (allTags[current].namespace === allTags[next].namespace) {
return allTags[next].tag;
}
// If no matching namespace is found, just use the next one
if (!unmatchedNamespaceTag) {
unmatchedNamespaceTag = allTags[next].tag;
}
}
return unmatchedNamespaceTag;
};
features.add({
id: __featureName__,
description: 'Adds a link to an automatic changelog for each tag/release.',
screenshot: 'https://user-images.githubusercontent.com/1402241/57081611-ad4a7180-6d27-11e9-9cb6-c54ec1ac18bb.png',
include: [
features.isReleasesOrTags
],
load: features.onAjaxedPages,
init
});
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