Sample Lua block creates a Farm Event to run a Sequence

Playing with the new ‘Lua sandbox’ block for Sequences this code was inspired by a use case mentioned by @mdingena in this recent topic.

This Lua block uses the env() function to retrieve 2 user-defined Key-Value pairs

  • ‘recovery_sequence_id’ is the Id of an existing Sequence that the new Farm Event will execute
  • ‘recovery_start_time’ is the (ISO 8601 formatted) start time for the new Farm Event

Setup your env K-V pairs by using the Settings helper env as mentioned in recent release notes, or, add a Lua block to the primary Sequence which just creates those parameters by using Lua env( 'key-name', 'value').

--
-- Lua block to create a Farm Event to run a specified Sequence
--

-- Fetch our current Web App API token value

tokens = 'https://my.farm.bot/api/tokens'
headers = {['Content-Type']='application/json'}
creds = {
  user = {
    email='your-email-configured-in-the-web-app',
    password='your-password-for-your-my.farm.bot-account'
  }
}
request = {
  url=tokens,
  headers=headers,
  method='POST',
  body=json.encode(creds)
}

res, err = http(request)

if err then
  send_message('warn', 'error '..inspect(err), "toast")
else
  token = json.decode(res.body)['token']['encoded']

  -- Create a Farm Event to run required Sequence
  -- Assume Env knows Sequence Id and Time offset

  farm_event = {
    executable_id = env('recovery_sequence_id'),
    executable_type = 'Sequence',
    ['repeat'] = '1',
    start_time = env('recovery_start_time'),
    time_unit = 'never'
  }
  farm_events = 'https://my.farm.bot/api/farm_events'
  headers = {
    ['Content-Type']='application/json',
    ['Authorization']='Bearer '..token
  }
  request = {
    url=farm_events,
    headers=headers,
    method='POST',
    body=json.encode(farm_event)
  }
  
    res, err = http(request)

  if err then
    send_message('warn', 'error '..inspect(err), "toast")
  else
    send_message(
      'success',
      "Farm Event created :: " .. inspect(json.decode(res.body)),
      'email'
      )
  end
  
end
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