service/service.go

service.go

package service

import (
	"context"

	"github.com/go-kit/log"
)

type service struct {
	logger log.Logger
}

// Service interface describes a service that adds numbers
type Service interface {
	Add(ctx context.Context, numA, numB float32) (float32, error)
	Subtract(ctx context.Context, numA, numB float32) (float32, error)
	Multiply(ctx context.Context, numA, numB float32) (float32, error)
	Divide(ctx context.Context, numA, numB float32) (float32, error)
}

// NewService creates a new service with all the expected dependencies and returns it
func NewService(logger log.Logger) Service {
	return &service{
		logger: logger,
	}
}

// Add func implements the Service interface
func (s service) Add(ctx context.Context, numA, numB float32) (float32, error) {
	return numA + numB, nil
}

// Subtract func implements the Service interface
func (s service) Subtract(ctx context.Context, numA, numB float32) (float32, error) {
	return numA - numB, nil
}

// Multiply func implements the Service interface
func (s service) Multiply(ctx context.Context, numA, numB float32) (float32, error) {
	return numA * numB, nil
}

// Divide func implements the Service interface
func (s service) Divide(ctx context.Context, numA, numB float32) (float32, error) {
	if numB == 0 {
		return 0, nil // You can handle error handling in your own way here :)
	}
	return numA / numB, nil
}