feat: Add Google Calendar Embed

app/embeds/GoogleCalendar.js

@@ -0,0 +1,37 @@
+// @flow
+import * as React from "react";
+import Image from "components/Image";
+import Frame from "./components/Frame";
+
+const URL_REGEX = new RegExp("^https?://calendar.google.com/calendar/(.*)$");
+
+type Props = {|
+  attrs: {|
+    href: string,
+    matches: string[],
+  |},
+|};
+
+export default class GoogleCalendar extends React.Component<Props> {
+  static ENABLED = [URL_REGEX];
+
+  render() {
+    return (
+      <Frame
+        {...this.props}
+        src={this.props.attrs.href}
+        icon={
+          <Image
+            src="/images/google-calendar.png"
+            alt="Google Calendar Icon"
+            width={16}
+            height={16}
+          />
+        }
+        canonicalUrl={this.props.attrs.href}
+        title="Google Calendar"
+        border
+      />
+    );
+  }
+}

app/embeds/GoogleCalendar.test.js

@@ -0,0 +1,19 @@
+/* eslint-disable flowtype/require-valid-file-annotation */
+import GoogleCalendar from "./GoogleCalendar";
+
+describe("GoogleCalendar", () => {
+  const match = GoogleCalendar.ENABLED[0];
+  test("to be enabled on share link", () => {
+    expect(
+      "https://calendar.google.com/calendar/embed?src=tom%40outline.com&ctz=America%2FSao_Paulo".match(
+        match
+      )
+    ).toBeTruthy();
+  });
+
+  test("to not be enabled elsewhere", () => {
+    expect("https://calendar.google.com/calendar".match(match)).toBe(null);
+    expect("https://calendar.google.com".match(match)).toBe(null);
+    expect("https://www.google.com".match(match)).toBe(null);
+  });
+});