design.mdx

import { Appear, Image } from 'mdx-deck' import { SplitRight } from 'mdx-deck/layouts'

Study case

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=== RUN TestOpenUmbrella
--- PASS: TestOpenUmbrella
PASS
OK

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import { CodeSurferLayout, CodeSurferColumnLayout, Code, Step, } from "code-surfer";

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Problem?

• Handler code is BIG and getting bigger
• Possibility redundancy code
• Difficult to manage branching of logic flow
• Difficult to mocking a function
• Cannot maintain code clarity

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Solution?

• Clean code
• Make a slim handler
• Put logic to usecase/service layer
• Move database query to repository layer

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What we got after refactor?

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Directory Structure

├── handler
│   └── handler.go
├── delivery
│   ├── todo_http.go
│   └── todo_http_test.go
├── repository
│   ├── mysql_category.go
│   ├── mysql_category_test.go
│   ├── mysql_task.go
│   ├── mysql_task_test.go
│   ├── repository_test.go
│   └── util.go
├── service.go
├── service_test.go
└── usecase
    ├── todo.go
    └── todo_test.go