Add administrative webhooks (#18510)

* Add administrative webhooks

* Fix error when webhook is deleted before delivery worker runs

app/models/admin/action_log.rb

@@ -1,4 +1,5 @@
 # frozen_string_literal: true
+
 # == Schema Information
 #
 # Table name: admin_action_logs

app/models/report.rb

@@ -55,6 +55,8 @@ class Report < ApplicationRecord
 
   before_validation :set_uri, only: :create
 
+  after_create_commit :trigger_webhooks
+
   def object_type
     :flag
   end
@@ -143,4 +145,8 @@ class Report < ApplicationRecord
 
     errors.add(:rule_ids, I18n.t('reports.errors.invalid_rules')) unless rules.size == rule_ids&.size
   end
+
+  def trigger_webhooks
+    TriggerWebhookWorker.perform_async('report.created', 'Report', id)
+  end
 end

app/models/user.rb

@@ -37,7 +37,6 @@
 #  sign_in_token_sent_at     :datetime
 #  webauthn_id               :string
 #  sign_up_ip                :inet
-#  skip_sign_in_token        :boolean
 #
 
 class User < ApplicationRecord
@@ -120,6 +119,7 @@ class User < ApplicationRecord
   before_validation :sanitize_languages
   before_create :set_approved
   after_commit :send_pending_devise_notifications
+  after_create_commit :trigger_webhooks
 
   # This avoids a deprecation warning from Rails 5.1
   # It seems possible that a future release of devise-two-factor will
@@ -182,7 +182,9 @@ class User < ApplicationRecord
   end
 
   def update_sign_in!(new_sign_in: false)
-    old_current, new_current = current_sign_in_at, Time.now.utc
+    old_current = current_sign_in_at
+    new_current = Time.now.utc
+
     self.last_sign_in_at     = old_current || new_current
     self.current_sign_in_at  = new_current
 
@@ -472,4 +474,8 @@ class User < ApplicationRecord
   def invite_text_required?
     Setting.require_invite_text && !invited? && !external? && !bypass_invite_request_check?
   end
+
+  def trigger_webhooks
+    TriggerWebhookWorker.perform_async('account.created', 'Account', account_id)
+  end
 end

app/models/webhook.rb

@@ -0,0 +1,58 @@
+# frozen_string_literal: true
+
+# == Schema Information
+#
+# Table name: webhooks
+#
+#  id         :bigint(8)        not null, primary key
+#  url        :string           not null
+#  events     :string           default([]), not null, is an Array
+#  secret     :string           default(""), not null
+#  enabled    :boolean          default(TRUE), not null
+#  created_at :datetime         not null
+#  updated_at :datetime         not null
+#
+
+class Webhook < ApplicationRecord
+  EVENTS = %w(
+    account.created
+    report.created
+  ).freeze
+
+  scope :enabled, -> { where(enabled: true) }
+
+  validates :url, presence: true, url: true
+  validates :secret, presence: true, length: { minimum: 12 }
+  validates :events, presence: true
+
+  validate :validate_events
+
+  before_validation :strip_events
+  before_validation :generate_secret
+
+  def rotate_secret!
+    update!(secret: SecureRandom.hex(20))
+  end
+
+  def enable!
+    update!(enabled: true)
+  end
+
+  def disable!
+    update!(enabled: false)
+  end
+
+  private
+
+  def validate_events
+    errors.add(:events, :invalid) if events.any? { |e| !EVENTS.include?(e) }
+  end
+
+  def strip_events
+    self.events = events.map { |str| str.strip.presence }.compact if events.present?
+  end
+
+  def generate_secret
+    self.secret = SecureRandom.hex(20) if secret.blank?
+  end
+end