Check that an invite link is valid before bypassing approval mode (mastodon#10657)

* Check that an invite link is valid before bypassing approval mode

Fixes mastodon#10656

* Add tests

* Only consider valid invite links in registration controller

* fixup

Author: ClearlyClaire

app/controllers/auth/registrations_controller.rb

@@ -91,7 +91,8 @@ def set_body_classes
   end
 
   def set_invite
-    @invite = invite_code.present? ? Invite.find_by(code: invite_code) : nil
+    invite = invite_code.present? ? Invite.find_by(code: invite_code) : nil
+    @invite = invite&.valid_for_use? ? invite : nil
   end
 
   def determine_layout

app/models/user.rb

@@ -114,7 +114,7 @@ def confirmed?
   end
 
   def invited?
-    invite_id.present?
+    invite_id.present? && invite.valid_for_use?
   end
 
   def disable!

spec/controllers/auth/registrations_controller_spec.rb

@@ -107,6 +107,89 @@
       end
     end
 
+    context 'approval-based registrations without invite' do
+      around do |example|
+        registrations_mode = Setting.registrations_mode
+        example.run
+        Setting.registrations_mode = registrations_mode
+      end
+
+      subject do
+        Setting.registrations_mode = 'approved'
+        request.headers["Accept-Language"] = accept_language
+        post :create, params: { user: { account_attributes: { username: 'test' }, email: 'test@example.com', password: '12345678', password_confirmation: '12345678' } }
+      end
+
+      it 'redirects to login page' do
+        subject
+        expect(response).to redirect_to new_user_session_path
+      end
+
+      it 'creates user' do
+        subject
+        user = User.find_by(email: 'test@example.com')
+        expect(user).to_not be_nil
+        expect(user.locale).to eq(accept_language)
+        expect(user.approved).to eq(false)
+      end
+    end
+
+    context 'approval-based registrations with expired invite' do
+      around do |example|
+        registrations_mode = Setting.registrations_mode
+        example.run
+        Setting.registrations_mode = registrations_mode
+      end
+
+      subject do
+        Setting.registrations_mode = 'approved'
+        request.headers["Accept-Language"] = accept_language
+        invite = Fabricate(:invite, max_uses: nil, expires_at: 1.hour.ago)
+        post :create, params: { user: { account_attributes: { username: 'test' }, email: 'test@example.com', password: '12345678', password_confirmation: '12345678', 'invite_code': invite.code } }
+      end
+
+      it 'redirects to login page' do
+        subject
+        expect(response).to redirect_to new_user_session_path
+      end
+
+      it 'creates user' do
+        subject
+        user = User.find_by(email: 'test@example.com')
+        expect(user).to_not be_nil
+        expect(user.locale).to eq(accept_language)
+        expect(user.approved).to eq(false)
+      end
+    end
+
+    context 'approval-based registrations with valid invite' do
+      around do |example|
+        registrations_mode = Setting.registrations_mode
+        example.run
+        Setting.registrations_mode = registrations_mode
+      end
+
+      subject do
+        Setting.registrations_mode = 'approved'
+        request.headers["Accept-Language"] = accept_language
+        invite = Fabricate(:invite, max_uses: nil, expires_at: 1.hour.from_now)
+        post :create, params: { user: { account_attributes: { username: 'test' }, email: 'test@example.com', password: '12345678', password_confirmation: '12345678', 'invite_code': invite.code } }
+      end
+
+      it 'redirects to login page' do
+        subject
+        expect(response).to redirect_to new_user_session_path
+      end
+
+      it 'creates user' do
+        subject
+        user = User.find_by(email: 'test@example.com')
+        expect(user).to_not be_nil
+        expect(user.locale).to eq(accept_language)
+        expect(user.approved).to eq(true)
+      end
+    end
+
     it 'does nothing if user already exists' do
       Fabricate(:user, account: Fabricate(:account, username: 'test'))
       subject