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import { Injectable } from "@angular/core";
import { Todo } from "./todo";
function uuid() {
let uuid = "";
for (let i = 0; i < 32; i++) {
const random = (Math.random() * 16) | 0;
if (i === 8 || i === 12 || i === 16 || i === 20)
uuid += "-";
uuid += (i === 12 ? 4 : i === 16 ? (random & 3) | 8 : random).toString(16);
}
return uuid;
}
@Injectable({
providedIn: "root",
})
export class TodosService {
todos: Todo[] = [];
addItem(title: string): void {
const todo: Todo = {
id: uuid(),
title,
completed: false,
};
this.todos.push(todo);
}
removeItem(todo: Todo): void {
const index = this.todos.indexOf(todo);
this.todos.splice(index, 1);
}
clearCompleted(): void {
this.todos = this.todos.filter((todo) => !todo.completed);
}
toggleAll(completed: boolean): void {
this.todos = this.todos.map((todo) => ({ ...todo, completed }));
}
getItems(type = "all"): Todo[] {
switch (type) {
case "active":
return this.todos.filter((todo) => !todo.completed);
case "completed":
return this.todos.filter((todo) => todo.completed);
}
return this.todos;
}
}