feat: Embed Google Drive (#1804)

* implement google drive extension

* add current logo of google drive

* fix issue when posting gdrive links which are already a preview

* always only show the preview

* Add bottom bar to get to original url for Google Drive embeds

Co-authored-by: Tom Moor <tom.moor@gmail.com>

app/embeds/GoogleDrive.test.js

@@ -0,0 +1,39 @@
+/* eslint-disable flowtype/require-valid-file-annotation */
+import GoogleDrive from "./GoogleDrive";
+
+describe("GoogleDrive", () => {
+  const match = GoogleDrive.ENABLED[0];
+  test("to be enabled on share link", () => {
+    expect(
+      "https://drive.google.com/file/d/1ohkOgmE8MiNx68u6ynBfYkgjeKu_x3ZK/view?usp=sharing".match(
+        match
+      )
+    ).toBeTruthy();
+    expect(
+      "https://drive.google.com/file/d/1ohkOgmE8MiNx68u6ynBfYkgjeKu_x3ZK/preview?usp=sharing".match(
+        match
+      )
+    ).toBeTruthy();
+  });
+
+  test("to not be enabled elsewhere", () => {
+    expect(
+      "https://drive.google.com/file/d/1ohkOgmE8MiNx68u6ynBfYkgjeKu_x3ZK/view".match(
+        match
+      )
+    ).toBe(null);
+    expect(
+      "https://drive.google.com/file/d/1ohkOgmE8MiNx68u6ynBfYkgjeKu_x3ZK/preview".match(
+        match
+      )
+    ).toBe(null);
+    expect(
+      "https://drive.google.com/file/d/1ohkOgmE8MiNx68u6ynBfYkgjeKu_x3ZK/view?usp=restricted".match(
+        match
+      )
+    ).toBeTruthy();
+    expect("https://drive.google.com/file".match(match)).toBe(null);
+    expect("https://drive.google.com".match(match)).toBe(null);
+    expect("https://www.google.com".match(match)).toBe(null);
+  });
+});