Rspec stubs for goCardless API integration

address_lookup_helpers.rb

# frozen_string_literal: true

module AddressLookupHelpers
  def stub_gc_create_subscription_url(amount, subscription_id, day)
    response_body = { subscriptions: subscription_response_body }.to_json

    stub_request(:post, "https://api.gocardless.com/subscriptions")
        .with(body: { subscriptions: subscription_params(amount, subscription_id, day) })
        .to_return(status: 200, body: response_body, headers: json_headers)
  end

  def stub_gc_cancel_subscription_url(subscription_id)
    response_body = { subscriptions: cancel_subscription_response_body }.to_json

    stub_request(:post, "https://api.gocardless.com/subscriptions/#{subscription_id}/actions/cancel")
        .with(body: { data: {} })
        .to_return(status: 200, body: response_body, headers: json_headers)
  end

  def stub_gc_create_payment_url(amount, invoice_number)
    response_body = { payments: payment_response_body }.to_json

    stub_request(:post, "https://api.gocardless.com/payments")
        .with(body: { payments: payment_params(amount, invoice_number) })
        .to_return(status: 200, body: response_body, headers: json_headers)
  end

  def stub_gc_completion_url
    response_body = { redirect_flows: completion_response_body }.to_json

    stub_request(:post, "https://api.gocardless.com/redirect_flows/mandate_id/actions/complete")
      .with(body: {})
      .to_return(status: 200, body: response_body, headers: json_headers)
  end

  def stub_gc_redirect_url(user, redirect_url)
    response_body = { redirect_flows: redirect_response_body }.to_json

    stub_request(:post, "https://api.gocardless.com/redirect_flows")
      .with(body: { redirect_flows: body_params(user, redirect_url) })
      .to_return(status: 200, body: response_body, headers: json_headers)
  end

  def stub_gc_cancel_mandate_url(mandate_id)
    response_body = { mandates: cancel_mandate_response_body }.to_json

    stub_request(:post, "https://api.gocardless.com/mandates/#{mandate_id}/actions/cancel")
        .with(body: { data: {} })
        .to_return(status: 200, body: response_body, headers: json_headers)
  end

  def stub_gc_cancel_mandate_fails_url(mandate_id)
    response_body = { error: cancel_mandate_fails_body }.to_json

    stub_request(:post, "https://api.gocardless.com/mandates/#{mandate_id}/actions/cancel")
        .with(body: { data: {} })
        .to_return(status: 404, body: response_body, headers: json_headers)
  end

  def json_headers
    { 'Content-Type' => 'application/json' }
  end

  def payment_response_body
    {
      id: "PM0002",
      status: "confirmed",
      created_at: Time.zone.now
    }
  end

  def subscription_response_body
    {
      id: "SB0001",
      status: "subscription_created",
      created_at: Time.zone.now
    }
  end

  def cancel_subscription_response_body
    {
      status: "subscription_cancelled",
      created_at: Time.zone.now
    }
  end

  def cancel_mandate_response_body
    {
      status: "mandate_cancelled",
      created_at: Time.zone.now
    }
  end

  def cancel_mandate_fails_body
    {
      type: 'invalid_state',
      code: 404,
      errors: [
        {
          message: 'A resource could not be found',
          reason: 'resource_not_found',
          links: {
          }
        }
      ]
    }
  end

  def completion_response_body
    {
      links: {
        mandate: "mandate_id"
      },
      confirmation_url: "http://confimation.url"
    }
  end

  def redirect_response_body
    {
      confirmation_url: 'confirmation_url-input',
      created_at: 'created_at-input',
      description: 'description-input',
      id: 'id-input',
      links: 'links-input',
      redirect_url: "https://pay.gocardless.com/flow/RE-Dummy",
      scheme: 'scheme-input',
      session_token: nil,
      success_redirect_url: "https://pay.gocardless.com/flow/RE-Dummy"
    }
  end

  def payment_params(amount, invoice_number)
    {
      amount: amount,
      currency: "GBP",
      links: {
        mandate: nil
      },
      metadata: {
        invoice_number: invoice_number
      }
    }
  end

  def subscription_params(amount, subscription_id, day)
    {
      amount: amount,
      currency: "GBP",
      interval_unit: 'monthly',
      day_of_month: day,
      links: {
        mandate: nil
      }
    }
  end

  def body_params(user, redirect_url)
    {
      description: "fflow",
      session_token: nil,
      success_redirect_url: redirect_url,
      prefilled_customer: {
        given_name: user.first_name,
        family_name: user.last_name,
        email: user.email
      }
    }
  end
end