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Prototype: Serlo editor as LTI tool

Local dev setup

Requirements:

  • Docker 24.0.0 or later
  1. Create a copy of .env.local.template as .env
  2. (optional) Add secret values to .env
  3. yarn to install dependencies
  4. yarn dev to start the databases and the express backend & build the frontend

Now, the editor is running locally. On code changes the express server will restart and the frontend will be rebuild.

Launch through Saltire

  1. Go to https://saltire.lti.app/platform, sign in, navigate to "Advanced options" and upload file saltire-platform_[TYPE].config of the saltire-configs/ directory. TYPE=LTIDeepLinking shows flow of creating a new Serlo Editor element. TYPE=LTIResourceLink_Instructor shows flow of opening an existing Serlo Editor element as Instructor (editable). TYPE=LTIResourceLink_Learner shows flow of opening an existing Serlo Editor element as Learner (non-editable).
  2. Click "Connect"

Launch through edu-sharing mock

  1. yarn dev-edusharing to start the edu-sharing mock
  2. Open http://localhost:8100

Technical details

LTI launch is handled by ltijs.

ltijs sets up an express server.

React frontend is bundled with Vite and then provided by the /app route in express.

On a successful LTI launch the server returns a signed accessToken jwt that the client can then later use to authenticate saving content.