discourse/.github/workflows/documentation.yml
Martin Brennan 60ad836313
DEV: Chat service object initial implementation (#19814)
This is a combined work of Martin Brennan, Loïc Guitaut, and Joffrey Jaffeux.

---

This commit implements a base service object when working in chat. The documentation is available at https://discourse.github.io/discourse/chat/backend/Chat/Service.html

Generating documentation has been made as part of this commit with a bigger goal in mind of generally making it easier to dive into the chat project.

Working with services generally involves 3 parts:

- The service object itself, which is a series of steps where few of them are specialized (model, transaction, policy)

```ruby
class UpdateAge
  include Chat::Service::Base

  model :user, :fetch_user
  policy :can_see_user
  contract
  step :update_age

  class Contract
    attribute :age, :integer
  end

  def fetch_user(user_id:, **)
    User.find_by(id: user_id)
  end

  def can_see_user(guardian:, **)
    guardian.can_see_user(user)
  end

  def update_age(age:, **)
    user.update!(age: age)
  end
end
```

- The `with_service` controller helper, handling success and failure of the service within a service and making easy to return proper response to it from the controller

```ruby
def update
  with_service(UpdateAge) do
    on_success { render_serialized(result.user, BasicUserSerializer, root: "user") }
  end
end
```

- Rspec matchers and steps inspector, improving the dev experience while creating specs for a service

```ruby
RSpec.describe(UpdateAge) do
  subject(:result) do
    described_class.call(guardian: guardian, user_id: user.id, age: age)
  end

  fab!(:user) { Fabricate(:user) }
  fab!(:current_user) { Fabricate(:admin) }

  let(:guardian) { Guardian.new(current_user) }
  let(:age) { 1 }

   it { expect(user.reload.age).to eq(age) }
end
```

Note in case of unexpected failure in your spec, the output will give all the relevant information:

```
  1) UpdateAge when no channel_id is given is expected to fail to find a model named 'user'
     Failure/Error: it { is_expected.to fail_to_find_a_model(:user) }

       Expected model 'foo' (key: 'result.model.user') was not found in the result object.

       [1/4] [model] 'user' 
       [2/4] [policy] 'can_see_user'
       [3/4] [contract] 'default'
       [4/4] [step] 'update_age'

       /Users/joffreyjaffeux/Code/pr-discourse/plugins/chat/app/services/update_age.rb:32:in `fetch_user': missing keyword: :user_id (ArgumentError)
       	from /Users/joffreyjaffeux/Code/pr-discourse/plugins/chat/app/services/base.rb:202:in `instance_exec'
       	from /Users/joffreyjaffeux/Code/pr-discourse/plugins/chat/app/services/base.rb:202:in `call'
       	from /Users/joffreyjaffeux/Code/pr-discourse/plugins/chat/app/services/base.rb:219:in `call'
       	from /Users/joffreyjaffeux/Code/pr-discourse/plugins/chat/app/services/base.rb:417:in `block in run!'
       	from /Users/joffreyjaffeux/Code/pr-discourse/plugins/chat/app/services/base.rb:417:in `each'
       	from /Users/joffreyjaffeux/Code/pr-discourse/plugins/chat/app/services/base.rb:417:in `run!'
       	from /Users/joffreyjaffeux/Code/pr-discourse/plugins/chat/app/services/base.rb:411:in `run'
       	from <internal:kernel>:90:in `tap'
       	from /Users/joffreyjaffeux/Code/pr-discourse/plugins/chat/app/services/base.rb:302:in `call'
       	from /Users/joffreyjaffeux/Code/pr-discourse/plugins/chat/spec/services/update_age_spec.rb:15:in `block (3 levels) in <main>'
```
2023-02-13 13:09:57 +01:00

82 lines
2.3 KiB
YAML

name: Documentation
on:
pull_request:
push:
branches:
- main
permissions:
contents: write
jobs:
build:
if: "!(github.event_name == 'push' && github.repository == 'discourse/discourse-private-mirror')"
name: run
runs-on: ubuntu-latest
container: discourse/discourse_test:slim
timeout-minutes: 30
steps:
- uses: actions/checkout@v3
with:
fetch-depth: 1
- name: Setup Git
run: |
git config --global user.email "ci@ci.invalid"
git config --global user.name "Discourse CI"
- name: Bundler cache
uses: actions/cache@v3
with:
path: vendor/bundle
key: ${{ runner.os }}-gem-${{ hashFiles('**/Gemfile.lock') }}
restore-keys: |
${{ runner.os }}-gem-
- name: Setup gems
run: |
gem install bundler --conservative -v $(awk '/BUNDLED WITH/ { getline; gsub(/ /,""); print $0 }' Gemfile.lock)
bundle config --local path vendor/bundle
bundle config --local deployment true
bundle install --jobs 4
bundle clean
- name: Get yarn cache directory
id: yarn-cache-dir
run: echo "dir=$(yarn cache dir)" >> $GITHUB_OUTPUT
- name: Yarn cache
uses: actions/cache@v3
id: yarn-cache
with:
path: ${{ steps.yarn-cache-dir.outputs.dir }}
key: ${{ runner.os }}-yarn-${{ hashFiles('**/yarn.lock') }}
restore-keys: |
${{ runner.os }}-yarn-
- name: Yarn install
run: yarn install
- name: Check documentation
run: |
LOAD_PLUGINS=1 bin/rake documentation
if [ ! -z "$(git status --porcelain documentation/)" ]; then
echo "Documentation is not up to date. To resolve, run:"
echo " LOAD_PLUGINS=1 bin/rake documentation"
echo
echo "Or manually apply the diff printed below:"
echo "---------------------------------------------"
git -c color.ui=always diff documentation/
exit 1
fi
timeout-minutes: 30
- name: Deploy documentation to github pages
uses: peaceiris/actions-gh-pages@v3
with:
github_token: ${{ secrets.GITHUB_TOKEN }}
publish_dir: ./documentation