# Jwt Generator

A NestJs Library to generate JWTs.

## Install

```bash
npm i --save @apihub24/jwt-generator
```

## Requirements

| Dependency                | Description                                                |
| ------------------------- | ---------------------------------------------------------- |
| @nestjs/config            | use the NestJs Config Module to get some keys listed below |
| @apihub24/session_service | used to create new Sessions when a new Token was created   |
| JWT_SECRET                | NestJs Config Key for Secret used to Sign JWT              |
| JWT_ISSUER                | NestJs Config Key for the JWT Issuer                       |
| JWT_AUDIENCE              | NestJs Config Key for the JWT Audience                     |

## Usage

```typescript
import {
  JwtGeneratorModule,
  JwtService,
  APIHUB24_TOKEN_SERVICE_INJECTION_KEY,
} from "@apihub24/jwt-generator";
// we use the @apihub24/session_service implementation from the InMemorySessionsModule
import { InMemorySessionsModule } from "@apihub24/in-memory-sessions";
// use the takeExportedProviders function from NestJs Helper Module to select the exported Providers
import { takeExportedProviders } from "@apihub24/nestjs-helper";

// use JwtGeneratorModule
const inMemorySessionsModule = InMemorySessionsModule.forRoot();
const jwtGeneratorModule = JwtGeneratorModule.forRoot([
  ...takeExportedProviders(inMemorySessionsModule),
]);

@Module({
  imports: [jwtGeneratorModule],
})

// now you can inject the service with injection Token
import * as tokenAuthentication from "@apihub24/token-authentication";

export class Test {
  constructor(
    @Inject(APIHUB24_TOKEN_SERVICE_INJECTION_KEY) jwtGenerator: JwtService
  );

  async test(session: tokenAuthentication.ISession) {
    const token = await this.jwtGenerator.generate(session);
  }
}
```