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openstapps/examples/minimal-plugin/README.md
2023-05-31 14:04:05 +02:00

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# minimal-connector
## Prerequisites
- `node` and `npm` installed
- a backend, which is running locally (e.g. on http://localhost:3000)
## How to get started
To install all required `npm` packages:
```shell script
npm install
```
To prepare the script to be executed, run:
```shell script
npm run build
```
To start the plugin, you need to execute the code in "CLI" script:
```shell script
node lib/cli.js -b <backendURL> -n <pluginName> -r <routeName> -u <URL> -p <port>
With fallback values being:
backendURL = http://localhost:3000 , pluginName = minimal-plugin ,
routeName = minimalplugin , URL = http://localhost, port = 4000
```
Using environment variables you can set backendURL via `STAPPS_BACKEND`, URL via `PLUGIN_URL` and port via `PLUGIN_URL`.
## Creating your own plugin
- Modify the default values in `cli.ts` to your needs:
- update the name
- update the port
- update the route
- update your request and response names (You need these in a bit)
- Rename the `minimal-plugin.ts` and the `MinimalPlugin` class to a more suitable name and adjust the imports in other files
- Delete the `sum` function in `minimal-plugin.ts` and write your own logic inside the `onRouteInvoke` function
- Define the layout of your http requests and responses inside the `/plugin/protocol` folder. The names of the interfaces
need to be the same as the request and response names you defined in the `cli.ts`
## Code structure
Folder `src` contains:
- Reference implementations for CLI and a plugin
- [/cli.ts](src/cli.ts)
- minimal CLI to start your connector, that uses CLI-args, so that there are no hard coded values for configuration
- will execute the specified connectors and push the data to the backend
- [/common.ts](src/common.ts) blank file for commonly used values across files to put in
- [/plugin/minimal-connector.ts](src/plugin/minimal-plugin.ts) minimal plugin class with some example logic
- [/plugin/protocol/request.ts](src/plugin/protocol/request.ts) the interface for any incoming http requests
- [/plugin/protocol/response.ts](src/plugin/protocol/response.ts) the interface for responses by the plugin to the backend
- [/plugin/protocol/tsconfig.json](src/plugin/protocol/response.ts) required by schema generator