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https://github.com/diegolinhares/freebooks

Book management application using Hotwire, SQLite and Litestack
https://github.com/diegolinhares/freebooks

api hotwire litestack rails sqlite

Last synced: 4 months ago
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Book management application using Hotwire, SQLite and Litestack

Host: GitHub
URL: https://github.com/diegolinhares/freebooks
Owner: diegolinhares
Created: 2024-06-23T08:00:08.000Z (7 months ago)
Default Branch: main
Last Pushed: 2024-07-03T03:05:54.000Z (7 months ago)
Last Synced: 2024-09-27T15:01:29.564Z (4 months ago)
Topics: api, hotwire, litestack, rails, sqlite
Language: Ruby
Homepage:
Size: 191 KB
Stars: 4
Watchers: 1
Forks: 0
Open Issues: 0
Metadata Files:
- Readme: README.md

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README

# README

Welcome to Freebooks!

**Spoiler:** Some frontend resources were extracted from the [Yataska](https://github.com/yataska) project.

You can check the application running in [this video](https://youtu.be/Cx2iWVKnxkM).

# Tooling

## Versions
- **Ruby**: 3.3.1
- **Rails**: 7.2.0.beta2

## Frontend
- **Hotwire**: Includes gems `turbo-rails` and `stimulus-rails`, used to add Turbo and Stimulus functionality, respectively.
- **Pico**: CSS framework used for web design.

## Database and Storage
- **sqlite**: Connector and adapter for SQLite database.
- **litestack**: Used for improving SQLite, for example, full text search.

## Application Features
- **Pagy**: Lightweight and efficient pagination gem.
- **action-policy**: Create policies for librarians.

## Testing
- **Fixtures**: Instead of FactoryBot, I've used Rails default fixtures. They were used to create the seeds too.
- **Rspec-rails**: Testing framework for Rails.
- **Shoulda-matchers**: Provides simplifications for testing Rails functionality.

# Features Implemented

- [x] Authentication and Authorization

- [x] Book Management

- [x] Borrowing and Returning

- [x] Dashboard

- [x] API Endpoints

- [x] Frontend (Bonus): Implemented using Hotwire

# Testing

Below is a summary of the testing efforts:

- [x] **Models**
- Comprehensive testing of all models to validate core functionality.

- [x] **Integration Tests (API)**
- Integration testing of API functionality to ensure proper communication.

## Getting Started

To get started, ensure that you have the following prerequisites installed on your system:

- Ruby (version 3.3.1)
- Rails (version 7.2.0.beta2)

### Setup

1. Clone the repository to your local machine.

```bash
git clone https://github.com/diegolinhares/freebooks
```

2. Navigate to the project directory.

```bash
cd freebooks
```

3. Run the following command to set up the project, which will install dependencies, create the database, and perform necessary setup tasks.

```bash
bin/setup
```

### Running the project

```bash
bin/dev
```

This will start the development server, and you can access the application at http://localhost:3000.

### Seed Data

The following user credentials are available for testing:

#### Librarian
- **Email:** [email protected]
- **Password:** 12341234
- **Role:** librarian
- **API Access Token:** WJDTXRjAxKoZ8WLxKKmjudLUEUMbzKP3g727QHsqY9

#### Member
- **Email:** [email protected]
- **Password:** 12341234
- **Role:** member
- **API Access Token:** fD7WoV9ZH4qii8KsvwmNKUbSVfsm79rtjwuxgKuCae

### Running tests
```bash
bundle exec rspec spec
```

This command will execute all the tests.

# Solution

### Overview

This project is divided into two contexts: Web and API. For both contexts, we have a "BackOffice" for members and another for librarians.

The controllers in each context handle authentication and authorization by role.

### Implementation

Some actions were basic CRUD operations. I didn't see the need to create services, use cases, or orchestrators. I used the controllers themselves as orchestrators, leveraging the expressiveness of Ruby/Rails.

### Book Borrowing

When a user attempts to borrow a book, I considered that, as a system with a lot of writes, it would be beneficial to use a pessimistic lock. This locks a book while a user is attempting to borrow it, helping to maintain the correct number of available books in a distributed environment. I created a specific attribute for this and compare it with the total number of books that exist.

An interesting challenge was ensuring that members can borrow a book only if it's available and cannot borrow the same book multiple times simultaneously. To solve this, I created a unique index in the database using a constraint and also added a validation at the application level:

```ruby
t.index ["user_id", "book_id"], name: "unique_borrowing_index", unique: true, where: "returned_at IS NULL"
```

### Book Search
Another challenge of this project was the search functionality for books by title, author, or genre. To address this, I used the full-text search feature with trigrams from SQLite, using the Litesearch functionality from the Litestack gem. For pagination, I combined the results with the Pagy gem.

### Fixtures and Seeds
Typically, when using RSpec, you use Factory Bot to create data. However, I preferred to use fixtures and implemented a seed strategy to have the same data in both development and test environments. You can see how this strategy works in the seeds.rb file.

# Database

```mermaid
erDiagram
USERS {
string email PK "unique"
string password_digest
string role
string api_access_token PK "unique"
datetime created_at
datetime updated_at
}

AUTHORS {
string name PK "unique"
datetime created_at
datetime updated_at
}

GENRES {
string name PK "unique"
datetime created_at
datetime updated_at
}

BOOKS {
string title
string isbn PK "unique"
int total_copies
int available_copies
int genre_id FK
int author_id FK
datetime created_at
datetime updated_at
}

BORROWINGS {
int user_id FK
int book_id FK
datetime borrowed_at
datetime due_date
datetime returned_at
datetime created_at
datetime updated_at
}

USERS ||--o{ BORROWINGS : "has many"
BOOKS ||--o{ BORROWINGS : "has many"
AUTHORS ||--o{ BOOKS : "writes"
GENRES ||--o{ BOOKS : "categorizes"
```

## Indexes

- **Authors Table:**
- Unique index on `name`

- **Books Table:**
- Index on `genre_id`
- Index on `author_id`
- Unique index on `isbn`

- **Borrowings Table:**
- Index on `user_id`
- Index on `book_id`
- Unique index on `user_id` and `book_id` where `returned_at` is NULL

- **Genres Table:**
- Unique index on `name`

- **Users Table:**
- Unique index on `email`
- Unique index on `api_access_token`

# API Endpoints

## Members

### Sessions

`POST /api/v1/members/sessions`

#### When Authenticated

```bash
curl -X POST http://localhost:3000/api/v1/members/sessions \
-H "Authorization: Bearer fD7WoV9ZH4qii8KsvwmNKUbSVfsm79rtjwuxgKuCae" \
-H "Content-Type: application/json" \
-d '{
"user": {
"email": "[email protected]",
"password": "12341234"
}
}'
```

**Expected Response:**

```bash
{
"status": "error",
"message": "Action not allowed for authenticated member",
"details": {}
}
```

#### When Unauthenticated (valid credentials)

```bash
curl -X POST http://localhost:3000/api/v1/members/sessions \
-H "Content-Type: application/json" \
-d '{
"user": {
"email": "[email protected]",
"password": "12341234"
}
}'
```

**Expected Response:**

```bash
{
"status": "success",
"type": "object",
"data": {
"access_token": "newly_generated_access_token"
}
}
```

#### When Unauthenticated (invalid credentials)
```bash
curl -X POST http://localhost:3000/api/v1/members/sessions \
-H "Content-Type: application/json" \
-d '{
"user": {
"email": "bad-email",
"password": "bad-pass"
}
}'
```

**Expected Response:**

```bash
{
"status": "error",
"message": "Invalid email or password",
"details": {}
}
```

### Delete Session

`DELETE /api/v1/members/sessions`

#### When Authenticated

```bash
curl -X DELETE http://localhost:3000/api/v1/members/sessions \
-H "Authorization: Bearer fD7WoV9ZH4qii8KsvwmNKUbSVfsm79rtjwuxgKuCae" \
-H "Content-Type: application/json"
```

**Expected Response:**

```bash
{
"status": "success"
}
```

#### When Unauthenticated
```bash
curl -X DELETE http://localhost:3000/api/v1/members/sessions \
-H "Content-Type: application/json"
```

**Expected Response:**

```bash
{
"status": "error",
"message": "Invalid access token",
"details": {}
}
```

### Registration

`POST /api/v1/members/registrations`

#### When Unauthenticated

To register a new member with valid parameters:

```bash
curl -X POST http://localhost:300/api/v1/members/registrations \
-H "Content-Type: application/json" \
-d '{
"user": {
"email": "[email protected]",
"password": "password123"
}
}'
```

**Expected Response:**

```bash
{
"status": "success",
"type": "object",
"data": {
"message": "Member registered successfully",
"access_token": "newly_generated_access_token"
}
}
```

To return an error when parameters are invalid:

```bash
curl -X POST http://localhost:300/api/v1/members/registrations \
-H "Content-Type: application/json" \
-d '{
"user": {
"email": "invalid_email",
"password": ""
}
}'
```

**Expected Response:**

```bash
{
"status": "error",
"message": "Failed to register member",
"details": [
"Email is invalid",
"Password can't be blank"
]
}
```

#### When Authenticated

To prevent authenticated members from registering again:

```bash
curl -X POST http://localhost:300/api/v1/members/registrations \
-H "Authorization: Bearer fD7WoV9ZH4qii8KsvwmNKUbSVfsm79rtjwuxgKuCae" \
-H "Content-Type: application/json" \
-d '{
"user": {
"email": "[email protected]",
"password": "password123"
}
}'
```

**Expected Response:**

```bash
{
"status": "error",
"message": "Action not allowed for authenticated member",
"details": {}
}
```
### Borrowings

`GET /api/v1/members/borrowings`

#### When Authenticated

To return paginated borrowings for the current member:

```bash
curl -X GET http://localhost:3000/api/v1/members/borrowings \
-H "Authorization: Bearer fD7WoV9ZH4qii8KsvwmNKUbSVfsm79rtjwuxgKuCae" \
-H "Content-Type: application/json"
```

**Expected Response:**

```bash
{
"status": "success",
"type": "object",
"data": {
"borrowings": [
{
"book_title": "Expired Book",
"status": "overdue"
},
{
"book_title": "A Game of Thrones",
"status": "not overdue"
},
{
"book_title": "Dune",
"status": "not overdue"
}
]
},
"pagination": {
"count": 3,
"items": 5,
"next": null,
"page": 1,
"pages": 1,
"prev": null
}
}
```

#### When Unauthenticated

To return unauthorized status:

```bash
curl -X GET http://localhost:3000/api/v1/members/borrowings \
-H "Content-Type: application/json"
```

**Expected Response:**

```bash
{
"status": "error",
"message": "Invalid access token",
"details": {}
}
```

### Create Borrowing

`POST /api/v1/members/book_borrowings`

#### When Authenticated

To create a borrowing successfully:

```bash
curl -X POST http://localhost:3000/api/v1/members/books/:book_id/borrowings \
-H "Authorization: Bearer fD7WoV9ZH4qii8KsvwmNKUbSVfsm79rtjwuxgKuCae" \
-H "Content-Type: application/json"
```

**Expected Response:**

```bash
{
"status": "success",
"data": {
"message": "Book successfully borrowed."
},
"type": "object"
}
```

To fail to create a borrowing when no copies are available:

```bash
curl -X POST http://localhost:3000/api/v1/members/books/:book_id/borrowings \
-H "Authorization: Bearer fD7WoV9ZH4qii8KsvwmNKUbSVfsm79rtjwuxgKuCae" \
-H "Content-Type: application/json"
```

**Expected Response:**

```bash
{
"status": "error",
"message": "No available copies to borrow.",
"details": {}
}
```

To return an error when the user tries to borrow a book they have already borrowed and not returned:

```bash
curl -X POST http://localhost:3000/api/v1/members/books/:book_id/borrowings \
-H "Authorization: Bearer fD7WoV9ZH4qii8KsvwmNKUbSVfsm79rtjwuxgKuCae" \
-H "Content-Type: application/json"
```

**Expected Response:**

```bash
{
"status": "error",
"message": "Failed to borrow book",
"details": ["User has already borrowed this book and not returned it yet"]
}
```

#### When Unauthenticated

To return unauthorized status:

```bash
curl -X POST http://localhost:3000/api/v1/members/books/:book_id/borrowings \
-H "Content-Type: application/json"
```

**Expected Response:**

```bash
{
"status": "error",
"message": "Invalid access token",
"details": {}
}
```

### Get Books

`GET /api/v1/members/books`

#### When Authenticated

To return paginated books for the current member:

```bash
curl -X GET http://localhost:3000/api/v1/members/books \
-H "Authorization: Bearer fD7WoV9ZH4qii8KsvwmNKUbSVfsm79rtjwuxgKuCae" \
-H "Content-Type: application/json"
```

**Expected Response:**

```bash
{
"status": "success",
"type": "object",
"data": {
"books": [
{
"title": "A Feast for Crows",
"author_name": "George R. R. Martin",
"genre_name": "Fantasy"
},
{
"title": "Dune",
"author_name": "Frank Herbert",
"genre_name": "Science Fiction"
},
{
"title": "A Dance with Dragons",
"author_name": "George R. R. Martin",
"genre_name": "Fantasy"
},
{
"title": "The Book Thief",
"author_name": "Markus Zusak",
"genre_name": "Historical Fiction"
},
{
"title": "Gone Girl",
"author_name": "Gillian Flynn",
"genre_name": "Thriller"
}
]
},
"pagination": {
"count": 16,
"items": 5,
"next": 2,
"page": 1,
"pages": 4,
"prev": null
}
}
```

To return paginated books for the search query "Dune":

```bash
curl -X GET http://localhost:3000/api/v1/members/books?query=Dune \
-H "Authorization: Bearer fD7WoV9ZH4qii8KsvwmNKUbSVfsm79rtjwuxgKuCae" \
-H "Content-Type: application/json"
```

**Expected Response:**

```bash
{
"status": "success",
"type": "object",
"data": {
"books": [
{
"title": "Dune",
"author_name": "Frank Herbert",
"genre_name": "Science Fiction"
}
]
},
"pagination": {
"count": 1,
"items": 5,
"next": null,
"page": 1,
"pages": 1,
"prev": null
}
}
```

#### When Unauthenticated

To return unauthorized status:

```bash
curl -X GET http://localhost:3000/api/v1/members/books \
-H "Content-Type: application/json"
```

**Expected Response:**

```bash
{
"status": "error",
"message": "Invalid access token",
"details": {}
}
```

## Librarians

### Create Session

`POST /api/v1/librarians/sessions`

#### When Authenticated

To avoid re-authenticating the user:

```bash
curl -X POST http://localhost:3000/api/v1/librarians/sessions \
-H "Authorization: Bearer WJDTXRjAxKoZ8WLxKKmjudLUEUMbzKP3g727QHsqY9" \
-H "Content-Type: application/json" \
-d '{
"user": {
"email": "[email protected]",
"password": "12341234"
}
}'
```

**Expected Response:**

```bash
{
"status": "error",
"message": "Action not allowed for authenticated librarian",
"details": {}
}
```

#### When Unauthenticated

To authenticate the user when parameters are valid:

```bash
curl -X POST http://localhost:3000/api/v1/librarians/sessions \
-H "Content-Type: application/json" \
-d '{
"user": {
"email": "[email protected]",
"password": "12341234"
}
}'
```

**Expected Response:**

```bash
{
"status": "success",
"type": "object",
"data": {
"access_token": "newly_generated_access_token"
}
}
```

To avoid authenticating the user when parameters are invalid:

```bash
curl -X POST http://localhost:3000/api/v1/librarians/sessions \
-H "Content-Type: application/json" \
-d '{
"user": {
"email": "bad-email",
"password": "bad-pass"
}
}'
```

**Expected Response:**

```bash
{
"status": "error",
"message": "Invalid email or password",
"details": {}
}
```

### Delete Session

`DELETE /api/v1/librarians/sessions`

#### When Authenticated

To sign out the current librarian and regenerate the API access token:

```bash
curl -X DELETE http://localhost:3000/api/v1/librarians/sessions \
-H "Authorization: Bearer WJDTXRjAxKoZ8WLxKKmjudLUEUMbzKP3g727QHsqY9" \
-H "Content-Type: application/json"
```

**Expected Response:**

```bash
{
"status": "success"
}
```

#### When Unauthenticated

To return unauthorized status:

```bash
curl -X DELETE http://localhost:3000/api/v1/librarians/sessions \
-H "Content-Type: application/json"
```

**Expected Response:**

```bash
{
"status": "error",
"message": "Invalid access token",
"details": {}
}
```

### Create Registration

`POST /api/v1/librarians/registrations`

#### When Unauthenticated

To register a new librarian and return access token:

```bash
curl -X POST http://localhost:3000/api/v1/librarians/registrations \
-H "Content-Type: application/json" \
-d '{
"user": {
"email": "[email protected]",
"password": "password123"
}
}'
```

**Expected Response:**

```bash
{
"status": "success",
"data": {
"message": "Librarian registered successfully",
"access_token": "newly_generated_access_token"
},
"type": "object"
}
```

To return errors when registration fails:

```bash
curl -X POST http://localhost:3000/api/v1/librarians/registrations \
-H "Content-Type: application/json" \
-d '{
"user": {
"email": "",
"password": "password123"
}
}'
```

**Expected Response:**

```bash
{
"status": "error",
"message": "Failed to register librarian",
"details": ["Email can't be blank"]
}
```

#### When Authenticated

To disallow authenticated librarian from registering:

```bash
curl -X POST http://localhost:3000/api/v1/librarians/registrations \
-H "Authorization: Bearer WJDTXRjAxKoZ8WLxKKmjudLUEUMbzKP3g727QHsqY9" \
-H "Content-Type: application/json" \
-d '{
"user": {
"email": "[email protected]",
"password": "password123"
}
}'
```

**Expected Response:**

```bash
{
"status": "error",
"details": {},
"message": "Action not allowed for authenticated librarian"
}
```

### Get Statistics

`GET /api/v1/librarians/statistics`

#### When Authenticated

To return dashboard statistics for the librarian:

```bash
curl -X GET http://localhost:3000/api/v1/librarians/statistics \
-H "Authorization: Bearer WJDTXRjAxKoZ8WLxKKmjudLUEUMbzKP3g727QHsqY9" \
-H "Content-Type: application/json"
```

**Expected Response:**

```bash
{
"status": "success",
"data": {
"books": 17,
"total_borrowed_books": 13,
"books_due_today": 0
},
"type": "object"
}
```

#### When Unauthenticated

To return unauthorized status:

```bash
curl -X GET http://localhost:3000/api/v1/librarians/statistics \
-H "Content-Type: application/json"
```

**Expected Response:**

```bash
{
"status": "error",
"message": "Invalid access token",
"details": {}
}
```

### Get Members

`GET /api/v1/librarians/members`

#### When Authenticated

To return paginated members with overdue books:

```bash
curl -X GET http://localhost:3000/api/v1/librarians/members \
-H "Authorization: Bearer WJDTXRjAxKoZ8WLxKKmjudLUEUMbzKP3g727QHsqY9" \
-H "Content-Type: application/json"
```

**Expected Response:**

```bash
{
"status": "success",
"data": {
"members": [
{
"email": "[email protected]"
},
{
"email": "[email protected]"
},
...
]
},
"pagination": {
"count": 10,
"items": 5,
"next": 2,
"page": 1,
"pages": 2,
"prev": null
},
"type": "object"
}
```

#### When Unauthenticated

To return unauthorized status:

```bash
curl -X GET http://localhost:3000/api/v1/librarians/members \
-H "Content-Type: application/json"
```

**Expected Response:**

```bash
{
"status": "error",
"message": "Invalid access token",
"details": {}
}
```

### Get Books

`GET /api/v1/librarians/books`

#### When Authenticated

To return paginated books for the librarian:

```bash
curl -X GET http://localhost:3000/api/v1/librarians/books \
-H "Authorization: Bearer WJDTXRjAxKoZ8WLxKKmjudLUEUMbzKP3g727QHsqY9" \
-H "Content-Type: application/json"
```

**Expected Response:**

```bash
{
"status": "success",
"type": "object",
"data": {
"books": [
{
"title": "A Feast for Crows",
"author_name": "George R. R. Martin",
"genre_name": "Fantasy"
},
{
"title": "Sapiens: A Brief History of Humankind",
"author_name": "Yuval Noah Harari",
"genre_name": "Non-fiction"
},
{
"title": "Dune",
"author_name": "Frank Herbert",
"genre_name": "Science Fiction"
},
{
"title": "A Dance with Dragons",
"author_name": "George R. R. Martin",
"genre_name": "Fantasy"
},
{
"title": "The Book Thief",
"author_name": "Markus Zusak",
"genre_name": "Historical Fiction"
}
]
},
"pagination": {
"count": 17,
"items": 5,
"next": 2,
"page": 1,
"pages": 4,
"prev": null
}
}
```

To return paginated books for the search query "Dune":

```bash
curl -X GET http://localhost:3000/api/v1/librarians/books?query=Dune \
-H "Authorization: Bearer WJDTXRjAxKoZ8WLxKKmjudLUEUMbzKP3g727QHsqY9" \
-H "Content-Type: application/json"
```

**Expected Response:**

#### When Unauthenticated

To return unauthorized status:

```bash
curl -X GET http://localhost:3000/api/v1/librarians/books \
-H "Content-Type: application/json"
```

**Expected Response:**

```bash
{
"status": "error",
"message": "Invalid access token",
"details": {}
}
```

### Create Book

`POST /api/v1/librarians/books`

#### When Authenticated

To create a book successfully:

```bash
curl -X POST http://localhost:3000/api/v1/librarians/books \
-H "Authorization: Bearer WJDTXRjAxKoZ8WLxKKmjudLUEUMbzKP3g727QHsqY9" \
-H "Content-Type: application/json" \
-d '{
"book": {
"title": "New Book",
"author_id": 1,
"genre_id": 1,
"isbn": "978-1234567890",
"total_copies": 10,
"available_copies": 10
}
}'
```

**Expected Response:**

```bash
{
"status": "success",
"data": {
"message": "Book created",
"book": {
"title": "New Book"
}
},
"type": "object"
}
```

To fail to create a book due to validation errors:

```bash
curl -X POST http://localhost:3000/api/v1/librarians/books \
-H "Authorization: Bearer WJDTXRjAxKoZ8WLxKKmjudLUEUMbzKP3g727QHsqY9" \
-H "Content-Type: application/json" \
-d '{
"book": {
"title": "",
"author_id": 1,
"genre_id": 1,
"isbn": "978-1234567890",
"total_copies": 10,
"available_copies": 10
}
}'
```

**Expected Response:**

```bash
{
"status": "error",
"message": "Failed to create book",
"details": ["Title can't be blank"]
}
```

#### When Unauthenticated

To return unauthorized status:

```bash
curl -X POST http://localhost:3000/api/v1/librarians/books \
-H "Content-Type: application/json" \
-d '{
"book": {
"title": "New Book",
"author_id": 1,
"genre_id": 1,
"isbn": "978-1234567890",
"total_copies": 10,
"available_copies": 10
}
}'
```

**Expected Response:**

```bash
{
"status": "error",
"message": "Invalid access token",
"details": {}
}
```

### Update Book

`PUT /api/v1/librarians/books/:id`

#### When Authenticated

To update a book successfully:

```bash
curl -X PUT http://localhost:3000/api/v1/librarians/books/1 \
-H "Authorization: Bearer WJDTXRjAxKoZ8WLxKKmjudLUEUMbzKP3g727QHsqY9" \
-H "Content-Type: application/json" \
-d '{
"book": {
"title": "Updated Book Title",
"author_id": 1,
"genre_id": 1,
"isbn": "978-1234567890",
"total_copies": 10,
"available_copies": 10
}
}'
```

**Expected Response:**

```bash
{
"status": "success",
"data": {
"message": "Book updated",
"book": {
"title": "Updated Book Title"
}
},
"type": "object"
}
```

To fail to update a book due to validation errors:

```bash
curl -X PUT http://localhost:3000/api/v1/librarians/books/1 \
-H "Authorization: Bearer WJDTXRjAxKoZ8WLxKKmjudLUEUMbzKP3g727QHsqY9" \
-H "Content-Type: application/json" \
-d '{
"book": {
"title": "",
"author_id": 1,
"genre_id": 1,
"isbn": "978-1234567890",
"total_copies": 10,
"available_copies": 10
}
}'
```

**Expected Response:**

```bash
{
"status": "error",
"message": "Failed to update book",
"details": ["Title can't be blank"]
}
```

#### When Unauthenticated

To return unauthorized status:

```bash
curl -X PUT http://localhost:3000/api/v1/librarians/books/1 \
-H "Content-Type: application/json" \
-d '{
"book": {
"title": "Updated Book Title",
"author_id": 1,
"genre_id": 1,
"isbn": "978-1234567890",
"total_copies": 10,
"available_copies": 10
}
}'
```

**Expected Response:**

```bash
{
"status": "error",
"message": "Invalid access token",
"details": {}
}
```

### Delete Book

`DELETE /api/v1/librarians/books/:id`

#### When Authenticated

To delete a book successfully:

```bash
curl -X DELETE http://localhost:3000/api/v1/librarians/books/1 \
-H "Authorization: Bearer WJDTXRjAxKoZ8WLxKKmjudLUEUMbzKP3g727QHsqY9" \
-H "Content-Type: application/json"
```

**Expected Response:**

```bash
{
"status": "success"
}
```

#### When Unauthenticated

To return unauthorized status:

```bash
curl -X DELETE http://localhost:3000/api/v1/librarians/books/1 \
-H "Content-Type: application/json"
```

**Expected Response:**

```bash
{
"status": "error",
"message": "Invalid access token",
"details": {}
}
```

### Get Member Borrowings

`GET /api/v1/librarians/members/:member_id/borrowings`

#### When Authenticated

To return paginated borrowings for the member:

```bash
curl -X GET http://localhost:3000/api/v1/librarians/members/1/borrowings \
-H "Authorization: Bearer WJDTXRjAxKoZ8WLxKKmjudLUEUMbzKP3g727QHsqY9" \
-H "Content-Type: application/json"
```

**Expected Response:**

```bash
{
"status": "success",
"data": {
"borrowings": [
{
"book_title": "Expired Book"
},
{
"book_title": "A Game of Thrones"
},
{
"book_title": "Dune"
}
]
}
}
```

#### When Unauthenticated

To return unauthorized status:

```bash
curl -X GET http://localhost:3000/api/v1/librarians/members/1/borrowings \
-H "Content-Type: application/json"
```

**Expected Response:**

```bash
{
"status": "error",
"message": "Invalid access token",
"details": {}
}
```

### Mark Book as Returned

`PATCH /api/v1/librarians/borrowings/:borrowing_id/return`

#### When Authenticated

To mark the book as returned:

```bash
curl -X PATCH http://localhost:3000/api/v1/librarians/borrowings/1/return \
-H "Authorization: Bearer WJDTXRjAxKoZ8WLxKKmjudLUEUMbzKP3g727QHsqY9" \
-H "Content-Type: application/json"
```

**Expected Response:**

```bash
{
"status": "success",
"data": {
"message": "Book marked as returned."
},
"type": "object"
}
```

#### When Unauthenticated

To return unauthorized status:

```bash
curl -X PATCH http://localhost:3000/api/v1/librarians/borrowings/1/return \
-H "Content-Type: application/json"
```

**Expected Response:**

```bash
{
"status": "error",
"message": "Invalid access token",
"details": {}
}
```