require 'spec_helper'

describe Gitlab::OAuth::User, lib: true do
  let(:oauth_user) { Gitlab::OAuth::User.new(auth_hash) }
  let(:gl_user) { oauth_user.gl_user }
  let(:uid) { 'my-uid' }
  let(:provider) { 'my-provider' }
  let(:auth_hash) { OmniAuth::AuthHash.new(uid: uid, provider: provider, info: info_hash) }
  let(:info_hash) do
    {
      nickname: '-john+gitlab-ETC%.git@gmail.com',
      name: 'John',
      email: 'john@mail.com'
    }
  end
  let(:ldap_user) { Gitlab::LDAP::Person.new(Net::LDAP::Entry.new, 'ldapmain') }

  describe '#persisted?' do
    let!(:existing_user) { create(:omniauth_user, extern_uid: 'my-uid', provider: 'my-provider') }

    it "finds an existing user based on uid and provider (facebook)" do
      expect( oauth_user.persisted? ).to be_truthy
    end

    it 'returns false if user is not found in database' do
      allow(auth_hash).to receive(:uid).and_return('non-existing')
      expect( oauth_user.persisted? ).to be_falsey
    end
  end

  describe '#save' do
    def stub_omniauth_config(messages)
      allow(Gitlab.config.omniauth).to receive_messages(messages)
    end

    def stub_ldap_config(messages)
      allow(Gitlab::LDAP::Config).to receive_messages(messages)
    end

    let(:provider) { 'twitter' }

    describe 'signup' do
      shared_examples 'to verify compliance with allow_single_sign_on' do
        context 'provider is marked as external' do
          it 'marks user as external' do
            stub_omniauth_config(allow_single_sign_on: ['twitter'], external_providers: ['twitter'])
            oauth_user.save
            expect(gl_user).to be_valid
            expect(gl_user.external).to be_truthy
          end
        end

        context 'provider was external, now has been removed' do
          it 'does not mark external user as internal' do
            create(:omniauth_user, extern_uid: 'my-uid', provider: 'twitter', external: true)
            stub_omniauth_config(allow_single_sign_on: ['twitter'], external_providers: ['facebook'])
            oauth_user.save
            expect(gl_user).to be_valid
            expect(gl_user.external).to be_truthy
          end
        end

        context 'provider is not external' do
          context 'when adding a new OAuth identity' do
            it 'does not promote an external user to internal' do
              user = create(:user, email: 'john@mail.com', external: true)
              user.identities.create(provider: provider, extern_uid: uid)

              oauth_user.save
              expect(gl_user).to be_valid
              expect(gl_user.external).to be_truthy
            end
          end
        end

        context 'with new allow_single_sign_on enabled syntax' do
          before { stub_omniauth_config(allow_single_sign_on: ['twitter']) }

          it "creates a user from Omniauth" do
            oauth_user.save

            expect(gl_user).to be_valid
            identity = gl_user.identities.first
            expect(identity.extern_uid).to eql uid
            expect(identity.provider).to eql 'twitter'
          end
        end

        context "with old allow_single_sign_on enabled syntax" do
          before { stub_omniauth_config(allow_single_sign_on: true) }

          it "creates a user from Omniauth" do
            oauth_user.save

            expect(gl_user).to be_valid
            identity = gl_user.identities.first
            expect(identity.extern_uid).to eql uid
            expect(identity.provider).to eql 'twitter'
          end
        end

        context 'with new allow_single_sign_on disabled syntax' do
          before { stub_omniauth_config(allow_single_sign_on: []) }
          it 'throws an error' do
            expect{ oauth_user.save }.to raise_error StandardError
          end
        end

        context 'with old allow_single_sign_on disabled (Default)' do
          before { stub_omniauth_config(allow_single_sign_on: false) }
          it 'throws an error' do
            expect{ oauth_user.save }.to raise_error StandardError
          end
        end
      end

      context "with auto_link_ldap_user disabled (default)" do
        before { stub_omniauth_config(auto_link_ldap_user: false) }
        include_examples "to verify compliance with allow_single_sign_on"
      end

      context "with auto_link_ldap_user enabled" do
        before { stub_omniauth_config(auto_link_ldap_user: true) }

        context "and no LDAP provider defined" do
          before { stub_ldap_config(providers: []) }

          include_examples "to verify compliance with allow_single_sign_on"
        end

        context "and at least one LDAP provider is defined" do
          before { stub_ldap_config(providers: %w(ldapmain)) }

          context "and a corresponding LDAP person" do
            before do
              allow(ldap_user).to receive(:uid) { uid }
              allow(ldap_user).to receive(:username) { uid }
              allow(ldap_user).to receive(:email) { ['johndoe@example.com', 'john2@example.com'] }
              allow(ldap_user).to receive(:dn) { 'uid=user1,ou=People,dc=example' }
            end

            context "and no account for the LDAP user" do
              it "creates a user with dual LDAP and omniauth identities" do
                allow(Gitlab::LDAP::Person).to receive(:find_by_uid).and_return(ldap_user)

                oauth_user.save

                expect(gl_user).to be_valid
                expect(gl_user.username).to eql uid
                expect(gl_user.email).to eql 'johndoe@example.com'
                expect(gl_user.identities.length).to eql 2
                identities_as_hash = gl_user.identities.map { |id| { provider: id.provider, extern_uid: id.extern_uid } }
                expect(identities_as_hash).to match_array(
                  [ { provider: 'ldapmain', extern_uid: 'uid=user1,ou=People,dc=example' },
                    { provider: 'twitter', extern_uid: uid }
                  ])
              end
            end

            context "and LDAP user has an account already" do
              let!(:existing_user) { create(:omniauth_user, email: 'john@example.com', extern_uid: 'uid=user1,ou=People,dc=example', provider: 'ldapmain', username: 'john') }
              it "adds the omniauth identity to the LDAP account" do
                allow(Gitlab::LDAP::Person).to receive(:find_by_uid).and_return(ldap_user)

                oauth_user.save

                expect(gl_user).to be_valid
                expect(gl_user.username).to eql 'john'
                expect(gl_user.email).to eql 'john@example.com'
                expect(gl_user.identities.length).to eql 2
                identities_as_hash = gl_user.identities.map { |id| { provider: id.provider, extern_uid: id.extern_uid } }
                expect(identities_as_hash).to match_array(
                  [ { provider: 'ldapmain', extern_uid: 'uid=user1,ou=People,dc=example' },
                    { provider: 'twitter', extern_uid: uid }
                  ])
              end
            end

            context 'when an LDAP person is not found by uid' do
              it 'tries to find an LDAP person by DN and adds the omniauth identity to the user' do
                allow(Gitlab::LDAP::Person).to receive(:find_by_uid).and_return(nil)
                allow(Gitlab::LDAP::Person).to receive(:find_by_dn).and_return(ldap_user)

                oauth_user.save

                identities_as_hash = gl_user.identities.map { |id| { provider: id.provider, extern_uid: id.extern_uid } }
                expect(identities_as_hash)
                  .to match_array(
                    [
                      { provider: 'ldapmain', extern_uid: 'uid=user1,ou=People,dc=example' },
                      { provider: 'twitter', extern_uid: uid }
                    ]
                  )
              end
            end
          end

          context "and no corresponding LDAP person" do
            before { allow(Gitlab::LDAP::Person).to receive(:find_by_uid).and_return(nil) }

            include_examples "to verify compliance with allow_single_sign_on"
          end
        end
      end
    end

    describe 'blocking' do
      let(:provider) { 'twitter' }
      before { stub_omniauth_config(allow_single_sign_on: ['twitter']) }

      context 'signup with omniauth only' do
        context 'dont block on create' do
          before { stub_omniauth_config(block_auto_created_users: false) }

          it do
            oauth_user.save
            expect(gl_user).to be_valid
            expect(gl_user).not_to be_blocked
          end
        end

        context 'block on create' do
          before { stub_omniauth_config(block_auto_created_users: true) }

          it do
            oauth_user.save
            expect(gl_user).to be_valid
            expect(gl_user).to be_blocked
          end
        end
      end

      context 'signup with linked omniauth and LDAP account' do
        before do
          stub_omniauth_config(auto_link_ldap_user: true)
          allow(ldap_user).to receive(:uid) { uid }
          allow(ldap_user).to receive(:username) { uid }
          allow(ldap_user).to receive(:email) { ['johndoe@example.com', 'john2@example.com'] }
          allow(ldap_user).to receive(:dn) { 'uid=user1,ou=People,dc=example' }
          allow(oauth_user).to receive(:ldap_person).and_return(ldap_user)
        end

        context "and no account for the LDAP user" do
          context 'dont block on create (LDAP)' do
            before { allow_any_instance_of(Gitlab::LDAP::Config).to receive_messages(block_auto_created_users: false) }

            it do
              oauth_user.save
              expect(gl_user).to be_valid
              expect(gl_user).not_to be_blocked
            end
          end

          context 'block on create (LDAP)' do
            before { allow_any_instance_of(Gitlab::LDAP::Config).to receive_messages(block_auto_created_users: true) }

            it do
              oauth_user.save
              expect(gl_user).to be_valid
              expect(gl_user).to be_blocked
            end
          end
        end

        context 'and LDAP user has an account already' do
          let!(:existing_user) { create(:omniauth_user, email: 'john@example.com', extern_uid: 'uid=user1,ou=People,dc=example', provider: 'ldapmain', username: 'john') }

          context 'dont block on create (LDAP)' do
            before { allow_any_instance_of(Gitlab::LDAP::Config).to receive_messages(block_auto_created_users: false) }

            it do
              oauth_user.save
              expect(gl_user).to be_valid
              expect(gl_user).not_to be_blocked
            end
          end

          context 'block on create (LDAP)' do
            before { allow_any_instance_of(Gitlab::LDAP::Config).to receive_messages(block_auto_created_users: true) }

            it do
              oauth_user.save
              expect(gl_user).to be_valid
              expect(gl_user).not_to be_blocked
            end
          end
        end
      end

      context 'sign-in' do
        before do
          oauth_user.save
          oauth_user.gl_user.activate
        end

        context 'dont block on create' do
          before { stub_omniauth_config(block_auto_created_users: false) }

          it do
            oauth_user.save
            expect(gl_user).to be_valid
            expect(gl_user).not_to be_blocked
          end
        end

        context 'block on create' do
          before { stub_omniauth_config(block_auto_created_users: true) }

          it do
            oauth_user.save
            expect(gl_user).to be_valid
            expect(gl_user).not_to be_blocked
          end
        end

        context 'dont block on create (LDAP)' do
          before { allow_any_instance_of(Gitlab::LDAP::Config).to receive_messages(block_auto_created_users: false) }

          it do
            oauth_user.save
            expect(gl_user).to be_valid
            expect(gl_user).not_to be_blocked
          end
        end

        context 'block on create (LDAP)' do
          before { allow_any_instance_of(Gitlab::LDAP::Config).to receive_messages(block_auto_created_users: true) }

          it do
            oauth_user.save
            expect(gl_user).to be_valid
            expect(gl_user).not_to be_blocked
          end
        end
      end
    end
  end
end
