Knock Ruby library

Knock API access for applications written in Ruby.

Documentation

See the documentation for Ruby usage examples.

Installation

gem install knockapi

Configuration

To use the library you must provide a secret API key, provided in the Knock dashboard.

You can set it as an environment variable:

KNOCK_API_KEY="sk_12345"

Or, you may set the key yourself in an initializer:

# /config/initializers/knock.rb
Knock.key = 'sk_12345'

Usage

Identifying users

require "knock"

Knock.key = "sk_12345"

Knock::Users.identify(
  id: "jhammond",
  data: {
    name: "John Hammond",
    email: "jhammond@ingen.net",
  }
)

Sending notifies (triggering workflows)

require "knock"

Knock.key = "sk_12345"

# The key of the workflow (from Knock dashboard)
Knock::Workflows.trigger(
  key: "dinosaurs-loose",
  # user id of who performed the action
  actor: "dnedry",
  # list of user ids for who should receive the notif
  recipients: ["jhammond", "agrant", "imalcolm", "esattler"],
  # data payload to send through
  data: {
    type: "trex",
    priority: 1,
  },
  # an optional key to provide to cancel a notify
  cancellation_key: trigger_alert.id,
)

Retrieving users

require "knock"

Knock.key = "sk_12345"

Knock::Users.get(id: "jhammond")

Deleting users

require "knock"

Knock.key = "sk_12345"

Knock::Users.delete(id: "jhammond")

Preferences

require "knock"
Knock.key = "sk_12345"

# Set an entire preference set
Knock::Users.set_preferences(
  user_id: "jhammond",
  channel_types: { email: true, sms: false },
  workflows: {
    'dinosaurs-loose': {
      channel_types: { email: false, in_app_feed: false }
    }
  }
)

# Get an entire preference set
Knock::Users.get_preferences(user_id: "jhammond")

Getting and setting channel data

require "knock"
Knock.key = "sk_12345"

# Set channel data for an APNS
Knock::Users.set_channel_data(
  id: "jhammond",
  channel_id: KNOCK_APNS_CHANNEL_ID,
  channel_data: {
    'tokens': [apns_token]
  }
)

# Get channel data for the APNS channel
Knock::Users.get_channel_data(user_id: "jhammond", channel_id: KNOCK_APNS_CHANNEL_ID)

Cancelling workflows

require "knock"
Knock.key = "sk_12345"

Knock::Workflows.cancel(
  key: "dinosaurs-loose",
  cancellation_key: trigger_alert.id,
  # Optionally, you can provide recipients to cancel for
  recipients: ["jhammond"]
)

Signing JWTs

You can use the jwt gem to sign JWTs easily. You will need to generate an environment specific signing key, which you can find in the Knock dashboard.

If you're using a signing token you will need to pass this to your client to perform authentication. You can read more about clientside authentication here.

require 'jwt'

secret = ENV['KNOCK_SIGNING_KEY']
now = Time.now.to_i

payload = {
  # The subject of the token
  sub: 'jhammond',
  # When the token was issued
  iat: now,
  # Expire the token in 1 week
  exp: now + (24 * 7 * 3600)
}

JWT.encode(payload, secret, 'RS256')