import type { Todo } from "../types";
/**
* The `TodoService` class provides methods for managing a to-do list backed by Cloudflare KV storage.
* This includes operations such as retrieving todos, adding new todos,
* deleting existing todos, and marking todos as completed.
*/
class TodoService {
constructor(
private env: Env,
private userID: string,
) {}
get = async (): Promise<Todo[]> => {
const todos = await this.env.TODOS.get<Todo[]>(this.userID, "json");
return todos || [];
};
#set = async (todos: Todo[]): Promise<Todo[]> => {
const sorted = todos.sort((t1, t2) => {
if (t1.completed === t2.completed) {
return t1.id.localeCompare(t2.id);
}
return t1.completed ? 1 : -1;
});
await this.env.TODOS.put(this.userID, JSON.stringify(sorted));
return sorted;
};
add = async (todoText: string): Promise<Todo[]> => {
const todos = await this.get();
const newTodo: Todo = {
completed: false,
id: Date.now().toString(),
text: todoText,
};
todos.push(newTodo);
return this.#set(todos);
};
delete = async (todoID: string): Promise<Todo[]> => {
const todos = await this.get();
const cleaned = todos.filter((t) => t.id !== todoID);
return this.#set(cleaned);
};
markCompleted = async (todoID: string): Promise<Todo[]> => {
const todos = await this.get();
const completedTodo = todos.find((t) => t.id === todoID);
if (completedTodo) {
completedTodo.completed = true;
return this.#set(todos);
}
return todos;
};
}
export const todoService = (env: Env, userID: string) => new TodoService(env, userID);
