Add webhook templating (#23289)

Co-authored-by: Claire <claire.github-309c@sitedethib.com>
pull/2246/head
Eugen Rochko 2023-06-06 10:42:47 +02:00 committed by GitHub
parent a80efb449e
commit 4eda233e09
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10 changed files with 134 additions and 11 deletions

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@ -71,7 +71,7 @@ module Admin
end
def resource_params
params.require(:webhook).permit(:url, events: [])
params.require(:webhook).permit(:url, :template, events: [])
end
end
end

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@ -0,0 +1,67 @@
# frozen_string_literal: true
class Webhooks::PayloadRenderer
class DocumentTraverser
INT_REGEX = /[0-9]+/
def initialize(document)
@document = document.with_indifferent_access
end
def get(path)
value = @document.dig(*parse_path(path))
string = Oj.dump(value)
# We want to make sure people can use the variable inside
# other strings, so it can't be wrapped in quotes.
if value.is_a?(String)
string[1...-1]
else
string
end
end
private
def parse_path(path)
path.split('.').filter_map do |segment|
if segment.match(INT_REGEX)
segment.to_i
else
segment.presence
end
end
end
end
class TemplateParser < Parslet::Parser
rule(:dot) { str('.') }
rule(:digit) { match('[0-9]') }
rule(:property_name) { match('[a-z_]').repeat(1) }
rule(:array_index) { digit.repeat(1) }
rule(:segment) { (property_name | array_index) }
rule(:path) { property_name >> (dot >> segment).repeat }
rule(:variable) { (str('}}').absent? >> path).repeat.as(:variable) }
rule(:expression) { str('{{') >> variable >> str('}}') }
rule(:text) { (str('{{').absent? >> any).repeat(1) }
rule(:text_with_expressions) { (text.as(:text) | expression).repeat.as(:text) }
root(:text_with_expressions)
end
EXPRESSION_REGEXP = /
\{\{
[a-z_]+
(\.
([a-z_]+|[0-9]+)
)*
\}\}
/iox
def initialize(json)
@document = DocumentTraverser.new(Oj.load(json))
end
def render(template)
template.gsub(EXPRESSION_REGEXP) { |match| @document.get(match[2...-2]) }
end
end

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@ -11,6 +11,7 @@
# enabled :boolean default(TRUE), not null
# created_at :datetime not null
# updated_at :datetime not null
# template :text
#
class Webhook < ApplicationRecord
@ -30,6 +31,7 @@ class Webhook < ApplicationRecord
validates :events, presence: true
validate :validate_events
validate :validate_template
before_validation :strip_events
before_validation :generate_secret
@ -49,7 +51,18 @@ class Webhook < ApplicationRecord
private
def validate_events
errors.add(:events, :invalid) if events.any? { |e| !EVENTS.include?(e) }
errors.add(:events, :invalid) if events.any? { |e| EVENTS.exclude?(e) }
end
def validate_template
return if template.blank?
begin
parser = Webhooks::PayloadRenderer::TemplateParser.new
parser.parse(template)
rescue Parslet::ParseFailed
errors.add(:template, :invalid)
end
end
def strip_events

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@ -7,5 +7,8 @@
.fields-group
= f.input :events, collection: Webhook::EVENTS, wrapper: :with_block_label, include_blank: false, as: :check_boxes, collection_wrapper_tag: 'ul', item_wrapper_tag: 'li'
.fields-group
= f.input :template, wrapper: :with_block_label, input_html: { placeholder: '{ "content": "Hello {{object.username}}" }' }
.actions
= f.button :button, @webhook.new_record? ? t('admin.webhooks.add_new') : t('generic.save_changes'), type: :submit

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@ -2,14 +2,14 @@
= t('admin.webhooks.title')
- content_for :heading do
%h2
%small
= fa_icon 'inbox'
= t('admin.webhooks.webhook')
= @webhook.url
- content_for :heading_actions do
= link_to t('admin.webhooks.edit'), edit_admin_webhook_path, class: 'button' if can?(:update, @webhook)
.content__heading__row
%h2
%small
= fa_icon 'inbox'
= t('admin.webhooks.webhook')
= @webhook.url
.content__heading__actions
= link_to t('admin.webhooks.edit'), edit_admin_webhook_path, class: 'button' if can?(:update, @webhook)
.table-wrapper
%table.table.horizontal-table

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@ -8,7 +8,7 @@ class Webhooks::DeliveryWorker
def perform(webhook_id, body)
@webhook = Webhook.find(webhook_id)
@body = body
@body = @webhook.template.blank? ? body : Webhooks::PayloadRenderer.new(body).render(@webhook.template)
@response = nil
perform_request

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@ -131,6 +131,7 @@ en:
position: Higher role decides conflict resolution in certain situations. Certain actions can only be performed on roles with a lower priority
webhook:
events: Select events to send
template: Compose your own JSON payload using variable interpolation. Leave blank for default JSON.
url: Where events will be sent to
labels:
account:
@ -304,6 +305,7 @@ en:
position: Priority
webhook:
events: Enabled events
template: Payload template
url: Endpoint URL
'no': 'No'
not_recommended: Not recommended

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@ -0,0 +1,7 @@
# frozen_string_literal: true
class AddTemplateToWebhooks < ActiveRecord::Migration[6.1]
def change
add_column :webhooks, :template, :text
end
end

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@ -1136,6 +1136,7 @@ ActiveRecord::Schema.define(version: 2023_06_05_085710) do
t.boolean "enabled", default: true, null: false
t.datetime "created_at", precision: 6, null: false
t.datetime "updated_at", precision: 6, null: false
t.text "template"
t.index ["url"], name: "index_webhooks_on_url", unique: true
end

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@ -0,0 +1,30 @@
# frozen_string_literal: true
require 'rails_helper'
describe Webhooks::PayloadRenderer do
subject(:renderer) { described_class.new(json) }
let(:event) { Webhooks::EventPresenter.new(type, object) }
let(:payload) { ActiveModelSerializers::SerializableResource.new(event, serializer: REST::Admin::WebhookEventSerializer, scope: nil, scope_name: :current_user).as_json }
let(:json) { Oj.dump(payload) }
describe '#render' do
context 'when event is account.approved' do
let(:type) { 'account.approved' }
let(:object) { Fabricate(:account, display_name: 'Foo"') }
it 'renders event-related variables into template' do
expect(renderer.render('foo={{event}}')).to eq 'foo=account.approved'
end
it 'renders event-specific variables into template' do
expect(renderer.render('foo={{object.username}}')).to eq "foo=#{object.username}"
end
it 'escapes values for use in JSON' do
expect(renderer.render('foo={{object.account.display_name}}')).to eq 'foo=Foo\\"'
end
end
end
end