feat(linear): Support refresh tokens and migrate legacy OAuth tokens (#13721)
Linear is deprecating long-lived OAuth2 access tokens (valid for 10 years) in favor of short-lived access tokens with refresh tokens. Starting October 1, 2025, all new OAuth2 apps will default to refresh tokens. Linear will no longer issue long-lived access tokens. Please read more details [here](https://linear.app/developers/oauth-2-0-authentication#migrate-to-using-refresh-tokens) We currently use long-lived tokens in our Linear integration (valid for up to 10 years). To remain compatible, this PR ensures compatibility by supporting refresh-token-based auth and migrating existing legacy tokens. Fixes https://linear.app/chatwoot/issue/CW-5541/migrate-linear-oauth2-integration-to-support-refresh-tokens
This commit is contained in:
Muhsin Keloth
178
spec/lib/integrations/linear/access_token_service_spec.rb
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178
spec/lib/integrations/linear/access_token_service_spec.rb
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require 'rails_helper'
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describe Integrations::Linear::AccessTokenService do
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let(:account) { create(:account) }
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let(:client_id) { 'linear_client_id' }
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let(:client_secret) { 'linear_client_secret' }
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before do
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allow(GlobalConfigService).to receive(:load).and_call_original
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allow(GlobalConfigService).to receive(:load).with('LINEAR_CLIENT_ID', nil).and_return(client_id)
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allow(GlobalConfigService).to receive(:load).with('LINEAR_CLIENT_SECRET', nil).and_return(client_secret)
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end
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describe '#access_token' do
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context 'when access token is still valid' do
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let(:hook) do
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create(
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:integrations_hook,
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:linear,
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account: account,
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access_token: 'valid_access_token',
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settings: {
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refresh_token: 'refresh_token',
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token_type: 'Bearer',
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scope: 'read,write',
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expires_on: 30.minutes.from_now.utc.to_s
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}
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)
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end
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it 'returns the current access token' do
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stub_request(:post, 'https://api.linear.app/oauth/token')
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.to_return(status: 200, body: {}.to_json, headers: { 'Content-Type' => 'application/json' })
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stub_request(:post, 'https://api.linear.app/oauth/migrate_old_token')
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.to_return(status: 200, body: {}.to_json, headers: { 'Content-Type' => 'application/json' })
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service = described_class.new(hook: hook)
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expect(service.access_token).to eq('valid_access_token')
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expect(WebMock).not_to have_requested(:post, 'https://api.linear.app/oauth/token')
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expect(WebMock).not_to have_requested(:post, 'https://api.linear.app/oauth/migrate_old_token')
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end
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end
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context 'when access token is expired and refresh token is present' do
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let(:hook) do
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create(
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:integrations_hook,
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:linear,
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account: account,
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access_token: 'expired_access_token',
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settings: {
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refresh_token: 'old_refresh_token',
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token_type: 'Bearer',
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scope: 'read,write',
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expires_on: 1.hour.ago.utc.to_s
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}
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)
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end
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it 'refreshes the token and persists new values' do
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stub_request(:post, 'https://api.linear.app/oauth/token')
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.to_return(
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status: 200,
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body: {
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access_token: 'new_access_token',
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refresh_token: 'new_refresh_token',
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token_type: 'Bearer',
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expires_in: 7200,
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scope: 'read,write'
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}.to_json,
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headers: { 'Content-Type' => 'application/json' }
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)
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service = described_class.new(hook: hook)
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expect(service.access_token).to eq('new_access_token')
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hook.reload
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expect(hook.access_token).to eq('new_access_token')
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expect(hook.settings['refresh_token']).to eq('new_refresh_token')
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expect(hook.settings['expires_in']).to eq(7200)
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expect(hook.settings['expires_on']).to be_present
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end
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it 'falls back to latest persisted token on refresh failure' do
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stub_request(:post, 'https://api.linear.app/oauth/token')
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.to_return(status: 401, body: { error: 'invalid_grant' }.to_json, headers: { 'Content-Type' => 'application/json' })
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Integrations::Hook.find(hook.id).update!(access_token: 'rotated_access_token')
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service = described_class.new(hook: hook)
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expect(service.access_token).to eq('rotated_access_token')
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end
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it 'does not overwrite the existing token on malformed success response' do
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stub_request(:post, 'https://api.linear.app/oauth/token')
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.to_return(
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status: 200,
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body: {
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refresh_token: 'new_refresh_token',
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token_type: 'Bearer',
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expires_in: 7200,
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scope: 'read,write'
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}.to_json,
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headers: { 'Content-Type' => 'application/json' }
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)
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service = described_class.new(hook: hook)
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expect(service.access_token).to eq('expired_access_token')
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hook.reload
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expect(hook.access_token).to eq('expired_access_token')
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expect(hook.settings['refresh_token']).to eq('old_refresh_token')
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end
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end
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context 'when refresh token is missing and legacy migration is applicable' do
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let(:hook) do
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create(
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:integrations_hook,
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:linear,
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account: account,
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access_token: 'legacy_access_token',
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settings: {
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token_type: 'Bearer',
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scope: 'read,write'
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}
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)
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end
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it 'migrates the legacy token and persists refresh token data' do
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stub_request(:post, 'https://api.linear.app/oauth/migrate_old_token')
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.to_return(
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status: 200,
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body: {
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access_token: 'migrated_access_token',
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refresh_token: 'migrated_refresh_token',
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token_type: 'Bearer',
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expires_in: 7200,
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scope: 'read,write'
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}.to_json,
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headers: { 'Content-Type' => 'application/json' }
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)
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service = described_class.new(hook: hook)
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expect(service.access_token).to eq('migrated_access_token')
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hook.reload
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expect(hook.access_token).to eq('migrated_access_token')
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expect(hook.settings['refresh_token']).to eq('migrated_refresh_token')
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expect(hook.settings['expires_in']).to eq(7200)
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expect(hook.settings['expires_on']).to be_present
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end
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it 'does not overwrite the existing token on malformed migration success response' do
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stub_request(:post, 'https://api.linear.app/oauth/migrate_old_token')
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.to_return(
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status: 200,
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body: {
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refresh_token: 'migrated_refresh_token',
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token_type: 'Bearer',
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expires_in: 7200,
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scope: 'read,write'
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}.to_json,
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headers: { 'Content-Type' => 'application/json' }
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)
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service = described_class.new(hook: hook)
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expect(service.access_token).to eq('legacy_access_token')
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hook.reload
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expect(hook.access_token).to eq('legacy_access_token')
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expect(hook.settings['token_type']).to eq('Bearer')
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end
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end
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end
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end
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