This script uses the Zendesk REST API v2 to update triggers.

update_zendesk_triggers_over_rest.rb

require 'yaml'
require 'json'
require 'httparty'

class Zendesk
  include HTTParty
  base_uri "https://zendeskinstance.zendesk.com/api/v2"
  headers 'Content-Type' => "application/json"
#  debug_output $stderr
  
  def initialize
    @config = load_config
  end

  def find_correct_triggers
    all_triggers = []
    next_url = "/triggers.json"
    until next_url.nil?
      page = fetch(next_url)
      all_triggers += page["triggers"]
      next_url = page["next_page"]
    end
    
    subsection_triggers = all_triggers.select { |t| t["title"].start_with?("Sub-section: ") }
  end

  def save_trigger(trigger)
    # new_trigger = { id: trigger["id"], conditions: trigger["conditions"] }
    body = { trigger: trigger }.to_json
    options_with_body = options.merge(body: body)
    self.class.put("/triggers/#{trigger["id"]}.json", options_with_body)
  end

  protected
  def load_config
    YAML.load_file('config/zendesk.yml')['production']
  end

  def options
    { basic_auth: { username: @config["username"], password: @config["password"] } }
  end

  def fetch(url)
    url.gsub!("https://govuk.zendesk.com/api/v2") if url.start_with?("http")
    JSON.parse(self.class.get(url, options).body)
  end
end

class Trigger
  PREFIX = "url: https://www.gov.uk"

  def initialize(zendesk, trigger)
    @zendesk = zendesk
    @trigger = trigger
  end

  def update
    if update_needed?
      puts "Updating #{@trigger["title"]}"
      @trigger["conditions"]["any"].each do |condition|
        # puts "[#{condition["value"]}] => [#{new_string(condition["value"])}]"
        condition["value"] = new_string(condition["value"])
      end
      @zendesk.save_trigger(@trigger)
    else
      puts "Ignoring #{@trigger["title"]}"
    end
  end

  protected
  def new_string(old_string)
    new_str = PREFIX.clone
    new_str += "/" unless old_string.start_with?("/")
    new_str + old_string
  end

  def update_needed?
    @trigger["conditions"]["any"].none? {|condition| condition["value"].start_with?(PREFIX) }
  end
end

zd = Zendesk.new
section_subsection_triggers = zd.find_correct_triggers

section_subsection_triggers.each do |trigger|
  Trigger.new(zd, trigger).update
end