7 files changed, 163 insertions, 18 deletions
diff --git a/src/api/version.ts b/src/api/version.ts
new file mode 100644
index 0000000..eb8a86c
--- /dev/null
+++ b/src/api/version.ts
@@ -0,0 +1,26 @@
+import { getURLAndInit } from 'src/misc/request-helper';
+import { ClashAPIConfig } from 'src/types';
+
+type VersionData = {
+  version: string;
+  premium?: boolean;
+};
+
+export async function fetchVersion(
+  endpoint: string,
+  apiConfig: ClashAPIConfig
+): Promise<VersionData> {
+  let json = { rules: [] };
+  try {
+    const { url, init } = getURLAndInit(apiConfig);
+    const res = await fetch(url + endpoint, init);
+    if (res.ok) {
+      json = await res.json();
+    }
+  } catch (err) {
+    // log and ignore
+    // eslint-disable-next-line no-console
+    console.log(`failed to fetch ${endpoint}`, err);
+  }
+  return json;
+}
diff --git a/src/components/Root.js b/src/components/Root.js
index 7b0ae04..f0a67ec 100644
--- a/src/components/Root.js
+++ b/src/components/Root.js
@@ -3,6 +3,7 @@ import './Root.css';
 import React, { Suspense } from 'react';
 import { HashRouter as Router, Route, Routes } from 'react-router-dom';
 import { RecoilRoot } from 'recoil';
+import { About } from 'src/components/about/About';
 
 import { actions, initialState } from '../store';
 import APIDiscovery from './APIDiscovery';
@@ -41,6 +42,7 @@ const routes = [
   ['logs', '/logs', <Logs />],
   ['proxies', '/proxies', <Proxies />],
   ['rules', '/rules', <Rules />],
+  ['about', '/about', <About />],
   __DEV__ ? ['style', '/style', <StyleGuide />] : false,
 ].filter(Boolean);
 
diff --git a/src/components/SideBar.js b/src/components/SideBar.js
index 05f6eba..29724ae 100644
--- a/src/components/SideBar.js
+++ b/src/components/SideBar.js
@@ -2,7 +2,7 @@ import cx from 'clsx';
 import { motion } from 'framer-motion';
 import PropTypes from 'prop-types';
 import React from 'react';
-// import { Command, Activity, Globe, Link2, Settings, File } from 'react-feather';
+import { Info } from 'react-feather';
 import {
   FcAreaChart,
   FcDocument,
@@ -16,7 +16,6 @@ import { Link, useLocation } from 'react-router-dom';
 import { getTheme, switchTheme } from '../store/app';
 import s from './SideBar.module.css';
 import { connect } from './StateProvider';
-import SvgYacd from './SvgYacd';
 
 const { useCallback } = React;
 
@@ -115,9 +114,17 @@ function SideBar({ dispatch, theme }) {
           />
         ))}
       </div>
-      <button className={s.themeSwitchContainer} onClick={switchThemeHooked}>
-        {theme === 'light' ? <MoonA /> : <Sun />}
-      </button>
+      <div className={s.footer}>
+        <button
+          className={cx(s.iconWrapper, s.themeSwitchContainer)}
+          onClick={switchThemeHooked}
+        >
+          {theme === 'light' ? <MoonA /> : <Sun />}
+        </button>
+        <Link to="/about" className={s.iconWrapper}>
+          <Info size={20} />
+        </Link>
+      </div>
     </div>
   );
 }
diff --git a/src/components/SideBar.module.css b/src/components/SideBar.module.css
index af91f75..275a007 100644
--- a/src/components/SideBar.module.css
+++ b/src/components/SideBar.module.css
@@ -68,34 +68,44 @@
   }
 }
 
-.themeSwitchContainer {
-  --sz: 40px;
-
-  @media (max-width: 768px) {
-    display: none;
-  }
-
+.footer {
   position: absolute;
   bottom: 10px;
   left: 50%;
   transform: translateX(-50%);
+}
+
+@media (max-width: 768px) {
+  .footer {
+    display: none;
+  }
+}
+
+.iconWrapper {
+  --sz: 40px;
+
   width: var(--sz);
   height: var(--sz);
   display: flex;
   justify-content: center;
   align-items: center;
 
+  padding: 5px;
   color: var(--color-text);
+  border-radius: 100%;
+  border: 1px solid transparent;
+}
+.iconWrapper:hover {
+  opacity: 0.6;
+}
+.iconWrapper:focus {
+  border-color: var(--color-focus-blue);
+}
 
-  padding: 5px;
+.themeSwitchContainer {
   appearance: none;
   outline: none;
   user-select: none;
   background: none;
   cursor: pointer;
-  border: 1px solid transparent;
-  border-radius: 100%;
-  &:focus {
-    border-color: var(--color-focus-blue);
-  }
 }
diff --git a/src/components/about/About.module.css b/src/components/about/About.module.css
new file mode 100644
index 0000000..632b3ee
--- /dev/null
+++ b/src/components/about/About.module.css
@@ -0,0 +1,18 @@
+.root {
+  padding: 6px 15px;
+  @media (--breakpoint-not-small) {
+    padding: 10px 40px;
+  }
+}
+
+.mono {
+  font-family: var(--font-mono);
+}
+
+.link {
+  color: var(--color-text-secondary);
+  display: inline-flex;
+}
+.link:hover {
+  color: var(--color-text-highlight);
+}
diff --git a/src/components/about/About.tsx b/src/components/about/About.tsx
new file mode 100644
index 0000000..7648934
--- /dev/null
+++ b/src/components/about/About.tsx
@@ -0,0 +1,78 @@
+import * as React from 'react';
+import { GitHub } from 'react-feather';
+import { useQuery } from 'react-query';
+import { fetchVersion } from 'src/api/version';
+import ContentHeader from 'src/components/ContentHeader';
+import { connect } from 'src/components/StateProvider';
+import { getClashAPIConfig } from 'src/store/app';
+import { ClashAPIConfig } from 'src/types';
+
+import s from './About.module.css';
+
+type Props = { apiConfig: ClashAPIConfig };
+
+function Version({
+  name,
+  link,
+  version,
+}: {
+  name: string;
+  link: string;
+  version: string;
+}) {
+  return (
+    <div className={s.root}>
+      <h2>{name}</h2>
+      <p>
+        <span>Version </span>
+        <span className={s.mono}>{version}</span>
+      </p>
+      <p>
+        <a
+          className={s.link}
+          href={link}
+          target="_blank"
+          rel="noopener noreferrer"
+        >
+          <GitHub size={20} />
+          <span>Source</span>
+        </a>
+      </p>
+    </div>
+  );
+}
+
+function AboutImpl(props: Props) {
+  const { data: version } = useQuery(
+    ['/version', props.apiConfig],
+    fetchVersion,
+    {
+      suspense: true,
+    }
+  );
+  console.log(version);
+
+  return (
+    <>
+      <ContentHeader title="About" />
+      {version ? (
+        <Version
+          name="Clash"
+          version={version.version}
+          link="https://github.com/Dreamacro/clash"
+        />
+      ) : null}
+      <Version
+        name="Yacd"
+        version={__VERSION__}
+        link="https://github.com/haishanh/yacd"
+      />
+    </>
+  );
+}
+
+const mapState = (s) => ({
+  apiConfig: getClashAPIConfig(s),
+});
+
+export const About = connect(mapState)(AboutImpl);
diff --git a/src/custom.d.ts b/src/custom.d.ts
index 9041f77..e60e225 100644
--- a/src/custom.d.ts
+++ b/src/custom.d.ts
@@ -3,3 +3,7 @@ declare module '*.module.css' {
   const classes: { [key: string]: string };
   export default classes;
 }
+
+// webpack definePlugin replacing variables
+declare const __VERSION__: string;
+declare const __DEV__: string;