Add dependency injection

Author: AndreuCodina

api/src/api/dependency_container.py

@@ -0,0 +1,22 @@
+from api.application_settings import ApplicationSettings
+from api.workflows.products.publish_product.publish_product_workflow import (
+    PublishProductWorkflow,
+)
+
+
+class DependencyContainer:
+    @classmethod
+    def initialize(cls) -> None:
+        cls.initialize_application_settings()
+
+    @classmethod
+    def initialize_application_settings(cls) -> None:
+        cls.application_settings = ApplicationSettings()  # type: ignore[reportCallIssue]
+
+    @classmethod
+    def get_application_settings(cls) -> ApplicationSettings:
+        return cls.application_settings
+
+    @classmethod
+    def get_publish_product_workflow(cls) -> PublishProductWorkflow:
+        return PublishProductWorkflow()

api/src/api/main.py

@@ -1,6 +1,11 @@
 from fastapi import FastAPI
 
+from api.dependency_container import DependencyContainer
+from api.workflows.products import product_router
+
+DependencyContainer.initialize()
 app = FastAPI()
+app.include_router(product_router.router)
 
 
 @app.get("/")

api/src/api/workflows/__init__.py

@@ -0,0 +1,19 @@
+from fastapi import APIRouter
+
+from api.dependency_container import DependencyContainer
+from api.workflows.products.publish_product.publish_product_request import (
+    PublishProductRequest,
+)
+from api.workflows.products.publish_product.publish_product_response import (
+    PublishProductResponse,
+)
+
+router = APIRouter(
+    prefix="/api/v1/products",
+    tags=["products"],
+)
+
+
+@router.post("")
+async def publish_product(request: PublishProductRequest) -> PublishProductResponse:
+    return await DependencyContainer.get_publish_product_workflow().execute(request)

api/src/api/workflows/products/__init__.py

@@ -0,0 +1,9 @@
+from decimal import Decimal
+
+from pydantic import BaseModel
+
+
+class PublishProductRequest(BaseModel):
+    name: str
+    description: str | None = None
+    price: Decimal

api/src/api/workflows/products/product_router.py

@@ -0,0 +1,5 @@
+from pydantic import BaseModel
+
+
+class PublishProductResponse(BaseModel):
+    id: str

api/src/api/workflows/products/publish_product/__init__.py

@@ -0,0 +1,11 @@
+from api.workflows.products.publish_product.publish_product_request import (
+    PublishProductRequest,
+)
+from api.workflows.products.publish_product.publish_product_response import (
+    PublishProductResponse,
+)
+
+
+class PublishProductWorkflow:
+    async def execute(self, request: PublishProductRequest) -> PublishProductResponse:
+        return PublishProductResponse(id=request.name)