434 lines
17 KiB
Rust
434 lines
17 KiB
Rust
use std::rc::Rc;
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use std::cell::Cell;
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use wasm_bindgen::prelude::*;
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use serde_derive::{Serialize, Deserialize};
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use web_sys::{window, HtmlElement, Storage};
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use futures_signals::map_ref;
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use futures_signals::signal::{Signal, SignalExt, Mutable};
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use futures_signals::signal_vec::{SignalVecExt, MutableVec};
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use dominator::{Dom, text, routing, html, clone, events};
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fn local_storage() -> Storage {
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window().unwrap_throw().local_storage().unwrap_throw().unwrap_throw()
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}
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// TODO make this more efficient
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#[inline]
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fn trim(input: &str) -> Option<String> {
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let trimmed = input.trim();
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if trimmed.is_empty() {
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None
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} else {
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Some(trimmed.to_owned())
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}
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}
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#[derive(Debug, Clone, Copy, PartialEq, Eq)]
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enum Filter {
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Active,
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Completed,
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All,
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}
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impl Filter {
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fn signal() -> impl Signal<Item = Self> {
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routing::url().map(|url| {
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match url.hash().as_str() {
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"#/active" => Filter::Active,
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"#/completed" => Filter::Completed,
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_ => Filter::All,
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}
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})
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}
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#[inline]
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fn button(kind: Self) -> Dom {
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let url = match kind {
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Filter::Active => "#/active",
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Filter::Completed => "#/completed",
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Filter::All => "#/",
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};
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let text = match kind {
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Filter::Active => "Active",
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Filter::Completed => "Completed",
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Filter::All => "All",
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};
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routing::link(url, |dom| { dom
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.class_signal("selected", Self::signal()
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.map(clone!(kind => move |filter| filter == kind)))
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.text(text)
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})
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}
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}
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#[derive(Debug, Serialize, Deserialize)]
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struct Todo {
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id: u32,
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title: Mutable<String>,
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completed: Mutable<bool>,
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#[serde(skip)]
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editing: Mutable<Option<String>>,
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}
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#[derive(Debug, Serialize, Deserialize)]
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struct State {
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todo_id: Cell<u32>,
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#[serde(skip)]
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new_todo_title: Mutable<String>,
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todo_list: MutableVec<Rc<Todo>>,
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}
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impl State {
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fn new() -> Self {
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State {
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todo_id: Cell::new(0),
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new_todo_title: Mutable::new("".to_owned()),
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todo_list: MutableVec::new(),
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}
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}
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fn remove_todo(&self, todo: &Todo) {
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// TODO make this more efficient ?
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self.todo_list.lock_mut().retain(|x| x.id != todo.id);
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}
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fn deserialize() -> Self {
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local_storage()
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.get_item("todos-rust-dominator")
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.unwrap_throw()
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.and_then(|state_json| {
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serde_json::from_str(state_json.as_str()).ok()
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})
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.unwrap_or_else(State::new)
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}
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fn serialize(&self) {
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let state_json = serde_json::to_string(self).unwrap_throw();
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local_storage().set_item("todos-rust-dominator", state_json.as_str()).unwrap_throw();
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}
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}
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#[wasm_bindgen(start)]
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pub fn main_js() -> Result<(), JsValue> {
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#[cfg(debug_assertions)]
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console_error_panic_hook::set_once();
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let state = Rc::new(State::deserialize());
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dominator::append_dom(dominator::body(),
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html!("section", {
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.class("todoapp")
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.children(&mut [
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html!("header", {
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.class("header")
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.children(&mut [
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html!("h1", {
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.text("todos")
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}),
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html!("input", {
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.focused(true)
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.class("new-todo")
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.attribute("placeholder", "What needs to be done?")
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.property_signal("value", state.new_todo_title.signal_cloned())
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.event(clone!(state => move |event: events::Input| {
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state.new_todo_title.set_neq(event.value().unwrap_throw());
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}))
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.event(clone!(state => move |event: events::KeyDown| {
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if event.key() == "Enter" {
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event.prevent_default();
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let trimmed = trim(&state.new_todo_title.lock_ref());
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if let Some(title) = trimmed {
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state.new_todo_title.set_neq("".to_owned());
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let id = state.todo_id.get();
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state.todo_id.set(id + 1);
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state.todo_list.lock_mut().push_cloned(Rc::new(Todo {
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id: id,
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title: Mutable::new(title),
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completed: Mutable::new(false),
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editing: Mutable::new(None),
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}));
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state.serialize();
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}
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}
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}))
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}),
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])
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}),
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html!("section", {
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.class("main")
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// Hide if it doesn't have any todos.
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.visible_signal(state.todo_list.signal_vec_cloned()
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.len()
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.map(|len| len > 0))
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.children(&mut [
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html!("input", {
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.class("toggle-all")
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.attribute("id", "toggle-all")
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.attribute("type", "checkbox")
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.property_signal("checked", state.todo_list.signal_vec_cloned()
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.map_signal(|todo| todo.completed.signal())
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.filter(|completed| !completed)
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.len()
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.map(|len| len != 0))
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.event(clone!(state => move |event: events::Change| {
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// Toggles the boolean
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let checked = !event.checked().unwrap_throw();
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{
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let todo_list = state.todo_list.lock_ref();
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for todo in todo_list.iter() {
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todo.completed.set_neq(checked);
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}
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}
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state.serialize();
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}))
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}),
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html!("label", {
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.attribute("for", "toggle-all")
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.text("Mark all as complete")
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}),
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html!("ul", {
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.class("todo-list")
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.children_signal_vec(state.todo_list.signal_vec_cloned()
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.map(clone!(state => move |todo| {
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html!("li", {
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.class_signal("editing", todo.editing.signal_cloned()
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.map(|x| x.is_some()))
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.class_signal("completed", todo.completed.signal())
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.visible_signal(map_ref!(
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let filter = Filter::signal(),
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let completed = todo.completed.signal() =>
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match *filter {
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Filter::Active => !completed,
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Filter::Completed => *completed,
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Filter::All => true,
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}
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)
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.dedupe())
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.children(&mut [
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html!("div", {
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.class("view")
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.children(&mut [
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html!("input", {
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.attribute("type", "checkbox")
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.class("toggle")
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.property_signal("checked", todo.completed.signal())
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.event(clone!(state, todo => move |event: events::Change| {
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todo.completed.set_neq(event.checked().unwrap_throw());
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state.serialize();
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}))
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}),
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html!("label", {
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.event(clone!(todo => move |_: events::DoubleClick| {
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todo.editing.set_neq(Some(todo.title.get_cloned()));
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}))
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.text_signal(todo.title.signal_cloned())
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}),
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html!("button", {
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.class("destroy")
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.event(clone!(state, todo => move |_: events::Click| {
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state.remove_todo(&todo);
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state.serialize();
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}))
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}),
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])
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}),
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html!("input", {
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.class("edit")
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.property_signal("value", todo.editing.signal_cloned()
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.map(|x| x.unwrap_or_else(|| "".to_owned())))
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.visible_signal(todo.editing.signal_cloned()
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.map(|x| x.is_some()))
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// TODO dedupe this somehow ?
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.focused_signal(todo.editing.signal_cloned()
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.map(|x| x.is_some()))
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.event(clone!(todo => move |event: events::KeyDown| {
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match event.key().as_str() {
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"Enter" => {
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event.dyn_target::<HtmlElement>().unwrap_throw().blur();
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},
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"Escape" => {
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todo.editing.set_neq(None);
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},
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_ => {}
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}
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}))
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.event(clone!(todo => move |event: events::Input| {
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todo.editing.set_neq(Some(event.value().unwrap_throw()));
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}))
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// TODO global_event ?
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.event(clone!(state, todo => move |_: events::Blur| {
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if let Some(title) = todo.editing.replace(None) {
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if let Some(title) = trim(&title) {
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todo.title.set_neq(title);
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} else {
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state.remove_todo(&todo);
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}
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state.serialize();
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}
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}))
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}),
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])
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})
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})))
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}),
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])
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}),
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html!("footer", {
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.class("footer")
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// Hide if it doesn't have any todos.
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.visible_signal(state.todo_list.signal_vec_cloned()
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.len()
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.map(|len| len > 0))
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.children(&mut [
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html!("span", {
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.class("todo-count")
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.children_signal_vec(state.todo_list.signal_vec_cloned()
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.map_signal(|todo| todo.completed.signal())
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.filter(|completed| !completed)
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.len()
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// TODO make this more efficient
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.map(|len| {
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vec![
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html!("strong", {
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.text(&len.to_string())
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}),
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text(if len == 1 {
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" item left"
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} else {
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" items left"
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}),
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]
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})
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.to_signal_vec())
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}),
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html!("ul", {
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.class("filters")
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.children(&mut [
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html!("li", {
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.children(&mut [
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Filter::button(Filter::All),
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])
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}),
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html!("li", {
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.children(&mut [
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Filter::button(Filter::Active),
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])
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}),
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html!("li", {
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.children(&mut [
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Filter::button(Filter::Completed),
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])
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}),
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])
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}),
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html!("button", {
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.class("clear-completed")
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// Hide if it doesn't have any completed items.
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.visible_signal(state.todo_list.signal_vec_cloned()
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.map_signal(|todo| todo.completed.signal())
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.filter(|completed| *completed)
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.len()
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.map(|len| len > 0))
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.event(clone!(state => move |_: events::Click| {
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state.todo_list.lock_mut().retain(|todo| todo.completed.get() == false);
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state.serialize();
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}))
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.text("Clear completed")
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}),
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])
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}),
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])
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}),
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);
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dominator::append_dom(dominator::body(),
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html!("footer", {
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.class("info")
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.children(&mut [
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html!("p", {
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.text("Double-click to edit a todo")
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}),
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html!("p", {
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.children(&mut [
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text("Created by "),
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html!("a", {
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.attribute("href", "https://github.com/Pauan")
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.text("Pauan")
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}),
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])
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}),
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html!("p", {
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.children(&mut [
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text("Part of "),
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html!("a", {
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.attribute("href", "http://todomvc.com")
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.text("TodoMVC")
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}),
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])
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}),
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])
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}),
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);
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Ok(())
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}
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