Add bookmarks (#7107)

* Add backend support for bookmarks

Bookmarks behave like favourites, except they aren't shared with other
users and do not have an associated counter.

* Add spec for bookmark endpoints

* Add front-end support for bookmarks

* Introduce OAuth scopes for bookmarks

* Add bookmarks to archive takeout

* Fix migration

* Coding style fixes

* Fix rebase issue

* Update bookmarked_statuses to latest UI changes

* Update bookmark actions to properly reflect status changes in state

* Add bookmarks item to single-column layout

* Make active bookmarks red

spec/controllers/api/v1/statuses/bookmarks_controller_spec.rb

@@ -0,0 +1,57 @@
+# frozen_string_literal: true
+
+require 'rails_helper'
+
+describe Api::V1::Statuses::BookmarksController do
+  render_views
+
+  let(:user)  { Fabricate(:user, account: Fabricate(:account, username: 'alice')) }
+  let(:app)   { Fabricate(:application, name: 'Test app', website: 'http://testapp.com') }
+  let(:token) { Fabricate(:accessible_access_token, resource_owner_id: user.id, scopes: 'write:bookmarks', application: app) }
+
+  context 'with an oauth token' do
+    before do
+      allow(controller).to receive(:doorkeeper_token) { token }
+    end
+
+    describe 'POST #create' do
+      let(:status) { Fabricate(:status, account: user.account) }
+
+      before do
+        post :create, params: { status_id: status.id }
+      end
+
+      it 'returns http success' do
+        expect(response).to have_http_status(:success)
+      end
+
+      it 'updates the bookmarked attribute' do
+        expect(user.account.bookmarked?(status)).to be true
+      end
+
+      it 'return json with updated attributes' do
+        hash_body = body_as_json
+
+        expect(hash_body[:id]).to eq status.id.to_s
+        expect(hash_body[:bookmarked]).to be true
+      end
+    end
+
+    describe 'POST #destroy' do
+      let(:status) { Fabricate(:status, account: user.account) }
+
+      before do
+        Bookmark.find_or_create_by!(account: user.account, status: status)
+        post :destroy, params: { status_id: status.id }
+      end
+
+      it 'returns http success' do
+        expect(response).to have_http_status(:success)
+      end
+
+      it 'updates the bookmarked attribute' do
+        expect(user.account.bookmarked?(status)).to be false
+      end
+    end
+  end
+end