AdonisJS DI

Car.js

'use strict'

class Car {
    constructor(driver) {
        this.driver = driver
    }

    run() {
        this.driver.drive()

        console.log('Car running');
    }

    static get inject() {
        return ['App/Services/TaxiDriver']
    }
}

module.exports = Car

LorryDriver.js

'use string'

class LorryDriver {
    constructor(license) {
        this.license = license
    }
    
    drive() {
        console.log('Lorry driver driving.')
    }
}

module.exports = LorryDriver

LorryDrivingLicense.js

'use strict'

class LorryDrivingLicense{
    show() {
        console.log('Lorry Driving License.');
    }
}

module.exports = LorryDrivingLicense

main.js

  // Calling in controller (Recursively resolving dependecies)
  const car = make('App/Services/Car')

  // When testing
//   const LorryDrivingLicense = use('App/Services/LorryDrivingLicense');
//   const TaxiDriver = use('App/Services/TaxiDriver');
//   const Car = use('App/Services/Car')

  const car = new Car(new TaxiDriver(new LorryDrivingLicense));

  car.run()

TaxiDriver.js

'use string'

class TaxiDriver {
    constructor(license) {
        this.license = license
    }

    drive() {
        this.license.show()

        console.log('Taxi driver driving.')
    }

    static get inject(){
        return ['App/Services/TaxiDrivingLicense'];
    }
}

module.exports = TaxiDriver

TaxiDrivingLicense.js

'use strict'

class TaxiDrivingLicense{
    show() {
        console.log('Showing taxi driving license.');
    }
}

module.exports = TaxiDrivingLicense