Stage 14: Todo list application

wrapperVersion=3.3.4
distributionType=only-script
distributionUrl=https://repo.maven.apache.org/maven2/org/apache/maven/apache-maven/3.9.16/apache-maven-3.9.16-bin.zip

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <parent><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-parent</artifactId><version>4.1.1</version><relativePath/></parent>
  <groupId>com.example</groupId><artifactId>todo-mvc</artifactId><version>1.0.0</version>
  <properties><java.version>21</java.version></properties>
  <dependencies>
    <dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-webmvc</artifactId></dependency>
    <dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-data-mongodb</artifactId></dependency>
    <dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-validation</artifactId></dependency>
    <dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-thymeleaf</artifactId></dependency>
    <dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-security</artifactId></dependency>
    <dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-test</artifactId><scope>test</scope></dependency>
  </dependencies>
  <build><plugins><plugin><groupId>org.springframework.boot</groupId><artifactId>spring-boot-maven-plugin</artifactId></plugin></plugins></build>
</project>

package com.example.todo;

import org.springframework.data.annotation.Id;
import org.springframework.data.mongodb.core.mapping.Document;

@Document("todos")
public class Todo {
    @Id private String id;
    private String title;
    private boolean completed;
    public Todo() {}
    public Todo(String title, boolean completed) { this.title=title; this.completed=completed; }
    public String getId() { return id; }
    public void setId(String id) { this.id=id; }
    public String getTitle() { return title; }
    public void setTitle(String title) { this.title=title; }
    public boolean isCompleted() { return completed; }
    public void setCompleted(boolean completed) { this.completed=completed; }
}

package com.example.todo;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class TodoApplication {
    public static void main(String[] args) {
        SpringApplication.run(TodoApplication.class, args);
    }
}

package com.example.todo;

import jakarta.validation.Valid;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.validation.BindingResult;
import org.springframework.web.bind.annotation.*;

@Controller
public class TodoController {
    private final TodoService service;
    public TodoController(TodoService service) { this.service=service; }
    @GetMapping("/") String home() { return "redirect:/todos"; }
    @GetMapping("/todos") String list(Model model) {
        model.addAttribute("todos",service.list()); return "list";
    }
    @GetMapping("/todos/new") String newTodo(Model model) {
        model.addAttribute("todoForm",new TodoForm()); model.addAttribute("action","/todos");
        return "form";
    }
    @PostMapping("/todos") String create(@Valid @ModelAttribute("todoForm") TodoForm form,
                                        BindingResult errors, Model model) {
        if(errors.hasErrors()) { model.addAttribute("action","/todos"); return "form"; }
        service.create(form.getTitle(),form.isCompleted()); return "redirect:/todos";
    }
    @GetMapping("/todos/{id}/edit") String edit(@PathVariable String id,Model model) {
        Todo todo=service.get(id); TodoForm form=new TodoForm();
        form.setTitle(todo.getTitle()); form.setCompleted(todo.isCompleted());
        model.addAttribute("todoForm",form); model.addAttribute("action","/todos/"+id);
        return "form";
    }
    @PostMapping("/todos/{id}") String update(@PathVariable String id,
        @Valid @ModelAttribute("todoForm") TodoForm form,BindingResult errors,Model model) {
        if(errors.hasErrors()) { model.addAttribute("action","/todos/"+id); return "form"; }
        service.update(id,form.getTitle(),form.isCompleted()); return "redirect:/todos";
    }
    @PostMapping("/todos/{id}/delete") String delete(@PathVariable String id) {
        service.delete(id); return "redirect:/todos";
    }
}

package com.example.todo;

import jakarta.validation.constraints.NotBlank;
import jakarta.validation.constraints.Size;

public class TodoForm {
    @NotBlank(message="Enter a title")
    @Size(max=120, message="Use at most 120 characters")
    private String title;
    private boolean completed;
    public String getTitle() { return title; }
    public void setTitle(String title) { this.title=title; }
    public boolean isCompleted() { return completed; }
    public void setCompleted(boolean completed) { this.completed=completed; }
}

package com.example.todo;

import org.springframework.data.mongodb.repository.MongoRepository;
public interface TodoRepository extends MongoRepository<Todo, String> {}

package com.example.todo;

import java.util.Comparator;
import java.util.List;
import org.springframework.stereotype.Service;
import org.springframework.web.server.ResponseStatusException;
import static org.springframework.http.HttpStatus.NOT_FOUND;

@Service
public class TodoService {
    private final TodoRepository repository;
    public TodoService(TodoRepository repository) { this.repository=repository; }
    public List<Todo> list() {
        return repository.findAll().stream().sorted(Comparator.comparing(Todo::getId)).toList();
    }
    public Todo get(String id) {
        return repository.findById(id).orElseThrow(() -> new ResponseStatusException(NOT_FOUND,"Todo not found"));
    }
    public Todo create(String title, boolean completed) {
        return repository.save(new Todo(title.strip(),completed));
    }
    public Todo update(String id, String title, boolean completed) {
        Todo todo=get(id); todo.setTitle(title.strip()); todo.setCompleted(completed);
        return repository.save(todo);
    }
    public void delete(String id) { Todo todo=get(id); repository.deleteById(todo.getId()); }
}

package com.example.todo;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.web.SecurityFilterChain;

@Configuration
public class WebSecurity {
    @Bean SecurityFilterChain web(HttpSecurity http) throws Exception {
        http.authorizeHttpRequests(a -> a.anyRequest().permitAll());
        return http.build();
    }
}

spring.application.name=todo-mvc
server.port=8080
spring.mongodb.uri=${MONGODB_URI}
spring.mongodb.database=todo_mvc
spring.data.mongodb.auto-index-creation=true
server.error.include-message=never
server.error.include-stacktrace=never
spring.thymeleaf.cache=false

body{font-family:system-ui,sans-serif;background:#f2f6f3;color:#17352a;margin:0}main{max-width:850px;margin:40px auto;background:white;padding:32px;border-radius:12px}input,button{font:inherit;padding:9px;margin:6px}input:not([type=checkbox]){display:block;width:min(90%,450px)}button{cursor:pointer;background:#176746;color:white;border:0;border-radius:5px}table{width:100%;margin-top:24px;border-collapse:collapse}td,th{text-align:left;padding:12px;border-bottom:1px solid #ddd}td form{display:inline}.error{color:#ae2525}a{color:#176746}

<!doctype html>
<html lang="en" xmlns:th="http://www.thymeleaf.org"><head>
<meta charset="UTF-8"><meta name="viewport" content="width=device-width,initial-scale=1">
<title>Todo form</title><link rel="stylesheet" th:href="@{/style.css}"></head>
<body><main><h1>Todo form</h1>
<form th:action="@{${action}}" th:object="${todoForm}" method="post">
<label for="title">Title</label><input id="title" th:field="*{title}" maxlength="120" required>
<p class="error" th:if="${#fields.hasErrors('title')}" th:errors="*{title}"></p>
<label><input type="checkbox" th:field="*{completed}"> Completed</label>
<button type="submit">Save todo</button></form>
<a th:href="@{/todos}">Back to list</a></main></body></html>

<!doctype html>
<html lang="en" xmlns:th="http://www.thymeleaf.org"><head>
<meta charset="UTF-8"><meta name="viewport" content="width=device-width,initial-scale=1">
<title>Classroom todos</title><link rel="stylesheet" th:href="@{/style.css}"></head>
<body><main><h1>Classroom todos</h1><a th:href="@{/todos/new}">Add a todo</a>
<p th:if="${#lists.isEmpty(todos)}">No todos yet. Add your first task.</p>
<table th:unless="${#lists.isEmpty(todos)}"><thead><tr><th>Title</th><th>Status</th><th>Actions</th></tr></thead>
<tbody><tr th:each="todo : ${todos}">
<td th:text="${todo.title}"></td><td th:text="${todo.completed ? 'Done' : 'Pending'}"></td>
<td><a th:href="@{/todos/{id}/edit(id=${todo.id})}">Edit</a>
<form th:action="@{/todos/{id}/delete(id=${todo.id})}" method="post">
<button type="submit">Delete</button></form></td></tr></tbody></table>
</main></body></html>

package com.example.todo;
import java.util.Optional;
import org.junit.jupiter.api.Test;
import org.springframework.web.server.ResponseStatusException;
import static org.junit.jupiter.api.Assertions.*;
import static org.mockito.Mockito.*;
class TodoServiceTest {
    @Test void missingUpdateCannotInsert() {
        TodoRepository repo=mock(TodoRepository.class);
        when(repo.findById("missing")).thenReturn(Optional.empty());
        TodoService service=new TodoService(repo);
        assertEquals(404,assertThrows(ResponseStatusException.class,
            () -> service.update("missing","Task",false)).getStatusCode().value());
        verify(repo,never()).save(any());
    }
    @Test void createTrimsTitle() {
        TodoRepository repo=mock(TodoRepository.class);
        when(repo.save(any(Todo.class))).thenAnswer(i -> i.getArgument(0));
        Todo todo=new TodoService(repo).create("  Teach Spring  ",false);
        assertEquals("Teach Spring",todo.getTitle()); assertFalse(todo.isCompleted());
    }
}