1 files changed, 84 insertions, 0 deletions
diff --git a/source/features/clean-conversation-filters.tsx b/source/features/clean-conversation-filters.tsx
new file mode 100644
index 00000000..35de266a
--- /dev/null
+++ b/source/features/clean-conversation-filters.tsx
@@ -0,0 +1,84 @@
+import cache from 'webext-storage-cache';
+import select from 'select-dom';
+import elementReady from 'element-ready';
+import * as pageDetect from 'github-url-detection';
+
+import features from '.';
+import * as api from '../github-helpers/api';
+import {getRepositoryInfo, getRepoURL, getRepoGQL} from '../github-helpers';
+
+const hasAnyProjects = cache.function(async (): Promise<boolean> => {
+	const {repository, organization} = await api.v4(`
+		repository(${getRepoGQL()}) {
+			projects { totalCount }
+		}
+		organization(login: "${getRepositoryInfo().owner!}") {
+			projects { totalCount }
+		}
+	`, {
+		allowErrors: true
+	});
+
+	return Boolean(repository.projects.totalCount) && Boolean(organization?.projects?.totalCount);
+}, {
+	maxAge: 3,
+	staleWhileRevalidate: 20,
+	cacheKey: () => `has-projects:${getRepoURL()}`
+});
+
+function getCount(element: HTMLElement): number {
+	return Number(element.textContent!.trim());
+}
+
+async function hideMilestones(): Promise<void> {
+	const milestones = select('[data-selected-links^="repo_milestones"] .Counter')!;
+	if (getCount(milestones) === 0) {
+		select('[data-hotkey="m"]')!.parentElement!.remove();
+	}
+}
+
+async function hasProjects(): Promise<boolean> {
+	const activeProjectsCounter = select('[data-hotkey="g b"] .Counter');
+	if (activeProjectsCounter && getCount(activeProjectsCounter) > 0) {
+		return true;
+	}
+
+	const isOrganization = select.exists('[rel=author][data-hovercard-type="organization"]');
+	if (!activeProjectsCounter && !isOrganization) {
+		// No tab = Projects disabled in repo
+		// No organization = no Projects in organization
+		return false;
+	}
+
+	return hasAnyProjects();
+}
+
+async function hideProjects(): Promise<void> {
+	if (!await hasProjects()) {
+		select('[data-hotkey="p"]')!.parentElement!.remove();
+	}
+}
+
+async function init(): Promise<void | false> {
+	if (!await elementReady('#js-issues-toolbar')) {
+		// Repo has no issues, so no toolbar is shown
+		return false;
+	}
+
+	await Promise.all([
+		hideMilestones(),
+		hideProjects()
+	]);
+}
+
+void features.add({
+	id: __filebasename,
+	description: 'Hides `Projects` and `Milestones` filters in conversation lists if they are empty.',
+	screenshot: 'https://user-images.githubusercontent.com/37769974/59083449-0ef88f80-8915-11e9-8296-68af1ddcf191.png'
+}, {
+	include: [
+		pageDetect.isRepoConversationList
+	],
+	waitForDomReady: false,
+	init
+});