Add bulk update todos method

Signed-off-by: Alexandre Beslic <abeslic@abronan.com>

README.md

@@ -84,6 +84,12 @@ curl -X POST -H "Content-Type: application/json" -d '{"items": [{"title":"Todo_1
 {"ids":["e8924469-8847-4840-ae16-21be734173f4","0db11e34-4707-4a5d-92fe-f4952213d940"]}
 ```
 
+- Bulk Update Todos:
+
+```bash
+curl -X PUT -H "Content-Type: application/json" -d '{"items": [{"id":"e94a6d0b-953b-4dad-aecb-318f183db4c7","title":"Todo_1","description":"Todo_1","completed":"true"},{"id":"d53daa2c-e6af-45ba-b192-3e1dc443b165","title":"Todo_2","description":"Todo_2","completed":"true"}]}' "http://localhost:8080/v1/todo/bulk"
+```
+
 ## Language/Libraries
 
 - golang

api/api.pb.txt

@@ -1545,6 +1545,20 @@ file {
   message_type {
     name: "UpdateTodoResponse"
   }
+  message_type {
+    name: "UpdateTodosRequest"
+    field {
+      name: "items"
+      number: 1
+      label: LABEL_REPEATED
+      type: TYPE_MESSAGE
+      type_name: ".todo.v1.Todo"
+      json_name: "items"
+    }
+  }
+  message_type {
+    name: "UpdateTodosResponse"
+  }
   service {
     name: "TodoService"
     method {
@@ -1600,6 +1614,17 @@ file {
         }
       }
     }
+    method {
+      name: "UpdateTodos"
+      input_type: ".todo.v1.UpdateTodosRequest"
+      output_type: ".todo.v1.UpdateTodosResponse"
+      options {
+        72295728 {
+          3: "/v1/todo/bulk"
+          7: "*"
+        }
+      }
+    }
   }
   options {
     go_package: "todo"

api/todo/v1/todo.proto

@@ -41,6 +41,13 @@ service TodoService {
 			body: "item"
 		};
 	}
+
+	rpc UpdateTodos(UpdateTodosRequest) returns (UpdateTodosResponse) {
+		option (google.api.http) ={
+			put: "/v1/todo/bulk"
+			body: "*"
+		};
+	}
 }
 
 message Todo {
@@ -91,3 +98,9 @@ message UpdateTodoRequest {
 }
 
 message UpdateTodoResponse {}
+
+message UpdateTodosRequest {
+	repeated Todo items = 1;
+}
+
+message UpdateTodosResponse {}

service/todo/todo.go

@@ -72,3 +72,19 @@ func (s Service) UpdateTodo(ctx context.Context, req *todo.UpdateTodoRequest) (*
 	}
 	return &todo.UpdateTodoResponse{}, nil
 }
+
+// UpdateTodos updates todo items given their respective title and description.
+func (s Service) UpdateTodos(ctx context.Context, req *todo.UpdateTodosRequest) (*todo.UpdateTodosResponse, error) {
+	time := types.TimestampNow()
+	for _, item := range req.Items {
+		item.UpdatedAt = time
+	}
+	res, err := s.DB.Model(&req.Items).Column("title", "description", "completed", "updated_at").Update()
+	if res.RowsAffected() == 0 {
+		return nil, grpc.Errorf(codes.NotFound, "Could not update item: not found")
+	}
+	if err != nil {
+		return nil, grpc.Errorf(codes.Internal, "Could not update item from the database: %s", err)
+	}
+	return &todo.UpdateTodosResponse{}, nil
+}