Zaikio::Webhooks

Gem that enables you to easily subscribe to Zaikio's webhooks. It also enables other gems to subscribe to events.

Installation

1. Add this line to your application's Gemfile:

gem 'zaikio-webhooks'

And then execute:

$ bundle

Or install it yourself as:

$ gem install zaikio-webhook

2. Configure the gem:

# config/initializers/zaikio_webhooks.rb

Zaikio::Webhooks.configure do |config|
  config.register_client :my_app do |my_app|
    my_app.shared_secret = "test-secret"
  end

  config.register_client :my_other_app do |my_other_app|
    my_other_app.shared_secret = "test-secret"
  end
end

3. Mount Engine

mount Zaikio::Webhooks::Engine => "/zaikio/webhook"

The final webhook URL will be:

https://mydomain.de/zaikio/webhook/:client_name

4. Configure ActiveJob

It is recommended to configure background processing, if not all events are performed immediately. Read the ActiveJob Rails Guide for more details.

5. Setup Custom Jobs

Every webhook callback expects one job. The job receives the event with useful attributes:

class AddMachineJob < ApplicationJob
  def perform(event)
    event.id # UUID
    event.name # directory.machine_added
    event.subject_type # Organization
    event.subject_id # UUID of the subject
    event.link # optional URL
    event.payload # Hash with the payload data
    event.created_at # DateTime
    event.received_at # DateTime
  end
end

6. Add Webhook URL to Zaikio Hub

Login to Zaikio Hub and go to your Apps and go to Edit App and add your webhook URL e.g. https://mydomain.de/zaikio/webhook/my_app_name.

Now you should receive all events you subscribed to.

7. Usage

When everything is set up you can register events with custom jobs, using the Zaikio::Webhooks.on function. This is idempotent and can be safely re-executed.

We can setup an initializer like so:

# config/initializers/zaikio_webhooks.rb

# We need to add this special wrapper here because we're referencing autoloaded constants
# (RevokeAccessTokenJob, AddMachineJob) at boot time. For more information, see:
# https://guides.rubyonrails.org/autoloading_and_reloading_constants.html#autoloading-when-the-application-boots
Rails.application.reloader.to_prepare do
  # Perform job immediately, for all clients
  Zaikio::Webhooks.on "directory.revoked_access_token", RevokeAccessTokenJob,
                      perform_now: true
  # Only for a specific client
  Zaikio::Webhooks.on "directory.machine_added", AddMachineJob,
                      client_name: :my_app, options: { custom_keyword_argument_for_job: "value" }
end

Contributing

• Make your changes and submit a pull request for them
• Make sure to update CHANGELOG.md

To release a new version of the gem:

• Update the version in lib/zaikio/webhooks/version.rb
• Update CHANGELOG.md to include the new version and its release date
• Commit and push your changes
• Create a new release on GitHub
• CircleCI will build the Gem package and push it Rubygems for you