Add more granular OAuth scopes (#7929)

* Add more granular OAuth scopes

* Add human-readable descriptions of the new scopes

* Ensure new scopes look good on the app UI

* Add tests

* Group scopes in screen and color-code dangerous ones

* Fix wrong extra scope

spec/controllers/api/v1/domain_blocks_controller_spec.rb

@@ -4,14 +4,24 @@ RSpec.describe Api::V1::DomainBlocksController, type: :controller do
   render_views
 
   let(:user)  { Fabricate(:user, account: Fabricate(:account, username: 'alice')) }
-  let(:token) { Fabricate(:accessible_access_token, resource_owner_id: user.id, scopes: 'follow') }
+  let(:token) { Fabricate(:accessible_access_token, resource_owner_id: user.id, scopes: scopes) }
 
   before do
     user.account.block_domain!('example.com')
     allow(controller).to receive(:doorkeeper_token) { token }
   end
 
+  shared_examples 'forbidden for wrong scope' do |wrong_scope|
+    let(:scopes) { wrong_scope }
+
+    it 'returns http forbidden' do
+      expect(response).to have_http_status(403)
+    end
+  end
+
   describe 'GET #show' do
+    let(:scopes) { 'read:blocks' }
+
     before do
       get :show, params: { limit: 1 }
     end
@@ -23,9 +33,13 @@ RSpec.describe Api::V1::DomainBlocksController, type: :controller do
     it 'returns blocked domains' do
       expect(body_as_json.first).to eq 'example.com'
     end
+
+    it_behaves_like 'forbidden for wrong scope', 'write:statuses'
   end
 
   describe 'POST #create' do
+    let(:scopes) { 'write:blocks' }
+
     before do
       post :create, params: { domain: 'example.org' }
     end
@@ -37,9 +51,13 @@ RSpec.describe Api::V1::DomainBlocksController, type: :controller do
     it 'creates a domain block' do
       expect(user.account.domain_blocking?('example.org')).to be true
     end
+
+    it_behaves_like 'forbidden for wrong scope', 'write:statuses'
   end
 
   describe 'DELETE #destroy' do
+    let(:scopes) { 'write:blocks' }
+
     before do
       delete :destroy, params: { domain: 'example.com' }
     end
@@ -51,5 +69,7 @@ RSpec.describe Api::V1::DomainBlocksController, type: :controller do
     it 'deletes a domain block' do
       expect(user.account.domain_blocking?('example.com')).to be false
     end
+
+    it_behaves_like 'forbidden for wrong scope', 'write:statuses'
   end
 end