adds beverage and ingredient manager

Author: fighting-dreamer

appcontext/dependencies.go

@@ -3,11 +3,15 @@ package appcontext
 import (
 	"nipun.io/brew_machine/repository"
 	local_repo "nipun.io/brew_machine/repository/local"
+	"nipun.io/brew_machine/service"
+	local_service "nipun.io/brew_machine/service/local"
 )
 
 type Instance struct {
 	BeverageRepository   repository.BeverageRepository
 	IngredientRepository repository.IngredientRepository
+	BeverageManager      service.BeverageManager
+	IngredientManager    service.IngredientManager
 }
 
 var AppDependencies *Instance
@@ -23,3 +27,15 @@ func (dependencies *Instance) addBeverageRepository() {
 func (dependencies *Instance) addIngredientRepository() {
 	dependencies.IngredientRepository = local_repo.NewInMemoryIngredientRepository()
 }
+
+func (dependencies *Instance) addBeverageManager() {
+	dependencies.BeverageManager = &local_service.LocalBeverageManager{
+		BeverageRepository: dependencies.BeverageRepository,
+	}
+}
+
+func (dependencies *Instance) addIngredientManager() {
+	dependencies.IngredientManager = &local_service.LocalIngredientManager{
+		IngredientRepository: dependencies.IngredientRepository,
+	}
+}

service/beverage_manager.go

@@ -0,0 +1,7 @@
+package service
+
+import "nipun.io/brew_machine/domain"
+
+type BeverageManager interface {
+	AddNew(beverage domain.Beverage) error
+}

service/ingredient_manager.go

@@ -0,0 +1,10 @@
+package service
+
+import "nipun.io/brew_machine/domain"
+
+type IngredientManager interface {
+	AddNew(ingredient domain.Ingredient) error
+	UpdateQuantity(name string, delta int) error
+	Get(name string) (*domain.Ingredient, error)
+	IsAvailable(name string) (bool, error)
+}

service/local/beverage_manager.go

@@ -0,0 +1,14 @@
+package service
+
+import (
+	"nipun.io/brew_machine/domain"
+	"nipun.io/brew_machine/repository"
+)
+
+type LocalBeverageManager struct {
+	BeverageRepository repository.BeverageRepository
+}
+
+func (lbm *LocalBeverageManager) AddNew(beverage domain.Beverage) error {
+	return lbm.BeverageRepository.AddNew(beverage)
+}

service/local/ingredient_manager.go

@@ -0,0 +1,33 @@
+package service
+
+import (
+	"nipun.io/brew_machine/domain"
+	"nipun.io/brew_machine/repository"
+)
+
+type LocalIngredientManager struct {
+	IngredientRepository repository.IngredientRepository
+}
+
+func (lim *LocalIngredientManager) AddNew(ingredient domain.Ingredient) error {
+	return lim.IngredientRepository.AddNew(ingredient)
+}
+
+func (lim *LocalIngredientManager) UpdateQuantity(name string, delta int) error {
+	return lim.IngredientRepository.UpdateQuantity(name, delta)
+}
+
+func (lim *LocalIngredientManager) Get(name string) (*domain.Ingredient, error) {
+	return lim.IngredientRepository.Get(name)
+}
+
+func (lim *LocalIngredientManager) IsAvailable(name string) (bool, error) {
+	ingredient, err := lim.Get(name)
+	if err != nil {
+		return false, err
+	}
+	if ingredient.AvailableQuantity > 0 {
+		return true, nil
+	}
+	return false, nil
+}