feat: Read-only users (#1955)

* Introduce isViewer field

* Update policies

* Make users read-only feature

* Remove not demoting current user validation

* Update tests

* Catch the unhandled promise rejection

* Hide unnecessary ui elements for read-only user

* Update app/scenes/Settings/People.js

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

* Remove redundant logic for admin only policies

* Use can logic

* Update snapshot

* Remove lint error

* Update snapshot

* Minor fix

* Update app/menus/UserMenu.js

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

* Update server/api/users.js

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

* Update app/components/DocumentListItem.js

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

* Update app/stores/UsersStore.js

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

* Use useCurrentTeam hook in functional component

* Update translation

* Update ternary

* Remove punctuation

* Move the functions to User model

* Update share policy and shareMenu

* Rename makeAdmin to promote

* Create updateCounts function and Rank enum

* Update tests

* Remove enum

* Use async await, remove enum and create computed accessor

* Remove unused variable

* Fix lint issues

* Hide templates

* Create shared/types and use rank type from it

* Delete shared/utils/rank type file

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

server/api/users.test.js

@@ -264,6 +264,40 @@ describe("#users.demote", () => {
     expect(body).toMatchSnapshot();
   });
 
+  it("should demote an admin to viewer", async () => {
+    const { admin, user } = await seed();
+    await user.update({ isAdmin: true }); // Make another admin
+
+    const res = await server.post("/api/users.demote", {
+      body: {
+        token: admin.getJwtToken(),
+        id: user.id,
+        to: "Viewer",
+      },
+    });
+    const body = await res.json();
+
+    expect(res.status).toEqual(200);
+    expect(body).toMatchSnapshot();
+  });
+
+  it("should demote an admin to member", async () => {
+    const { admin, user } = await seed();
+    await user.update({ isAdmin: true }); // Make another admin
+
+    const res = await server.post("/api/users.demote", {
+      body: {
+        token: admin.getJwtToken(),
+        id: user.id,
+        to: "Member",
+      },
+    });
+    const body = await res.json();
+
+    expect(res.status).toEqual(200);
+    expect(body).toMatchSnapshot();
+  });
+
   it("should not demote admins if only one available", async () => {
     const admin = await buildAdmin();