From ae7948b2b822432dda4e3887ecf64e13be55d9ad Mon Sep 17 00:00:00 2001
From: clapscofield <clarisse.scofield@gmail.com>
Date: Fri, 5 Mar 2021 18:06:41 -0300
Subject: [PATCH] =?UTF-8?q?Tarefa=20pr=C3=A1tica=20#1=20-=20Microservices?=
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---
 proto/inventory.proto        | 5 +++++
 services/controller/index.js | 7 ++++++-
 services/inventory/index.js  | 6 ++++++
 3 files changed, 17 insertions(+), 1 deletion(-)

diff --git a/proto/inventory.proto b/proto/inventory.proto
index c819783e..4f8edac7 100644
--- a/proto/inventory.proto
+++ b/proto/inventory.proto
@@ -2,6 +2,7 @@ syntax = "proto3";
 
 service InventoryService {
     rpc SearchAllProducts(Empty) returns (ProductsResponse) {}
+    rpc SearchProductByID(Payload) returns (ProductResponse) {}
 }
 
 message Empty{}
@@ -18,3 +19,7 @@ message ProductResponse {
 message ProductsResponse {
     repeated ProductResponse products = 1;
 }
+
+message Payload {
+    int32 id = 1;
+}
\ No newline at end of file
diff --git a/services/controller/index.js b/services/controller/index.js
index 19258e78..3525cb48 100644
--- a/services/controller/index.js
+++ b/services/controller/index.js
@@ -43,16 +43,21 @@ app.get('/shipping/:cep', (req, res, next) => {
 });
 
 app.get('/product/:id', (req, res, next) => {
+    // Chama método do microsserviço.
     inventory.SearchProductByID({ id: req.params.id }, (err, product) => {
+        // Se ocorrer algum erro de comunicação
+        // com o microsserviço, retorna para o navegador.
         if (err) {
             console.error(err);
             res.status(500).send({ error: 'something failed :(' });
         } else {
+            // Caso contrário, retorna resultado do
+            // microsserviço (um arquivo JSON) com os dados
+            // do produto pesquisado
             res.json(product);
         }
     });
 });
-
 /**
  * Inicia o router
  */
diff --git a/services/inventory/index.js b/services/inventory/index.js
index 2eeabc9d..20bcd276 100644
--- a/services/inventory/index.js
+++ b/services/inventory/index.js
@@ -20,6 +20,12 @@ server.addService(inventoryProto.InventoryService.service, {
             products: products,
         });
     },
+    searchProductById: (payload, callback) => {
+        callback(
+            null,
+            products.find((product) => product.id == payload.request.id)
+        );
+    },
 });
 
 server.bindAsync('127.0.0.1:3002', grpc.ServerCredentials.createInsecure(), () => {