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+use rocket::response::content::RawHtml; +use maud::{html, DOCTYPE}; + +#[derive(Clone)] +struct Todo { + id: u32, + title: String, + completed: bool, +} + +/// In-memory store for todos, protected by a Mutex for thread-safe access. +/// Rocket handlers access it via `&State`. +struct TodoStore { + todos: Mutex>, + next_id: Mutex, +} + +impl TodoStore { + fn new() -> Self { + TodoStore { + todos: Mutex::new(Vec::new()), + next_id: Mutex::new(1), + } + } + + /// Adds a new todo and returns a clone of it (so the handler can render it). + fn add(&self, title: String) -> Todo { + let mut todos = self.todos.lock().unwrap(); + let mut next_id = self.next_id.lock().unwrap(); + let todo = Todo { + id: *next_id, + title, + completed: false, + }; + *next_id += 1; + todos.push(Todo { + id: todo.id, + title: todo.title.clone(), + completed: todo.completed, + }); + todo + } + + /// Toggles the completed status of a todo by ID. Returns the updated todo if found. + fn toggle(&self, id: u32) -> Option { + let mut todos = self.todos.lock().unwrap(); + todos.iter_mut().find(|t| t.id == id).map(|todo| { + todo.completed = !todo.completed; + Todo { + id: todo.id, + title: todo.title.clone(), + completed: todo.completed, + } + }) + } + + /// Deletes a todo by ID. Returns true if something was removed. + fn delete(&self, id: u32) -> bool { + let mut todos = self.todos.lock().unwrap(); + let len_before = todos.len(); + todos.retain(|t| t.id != id); + todos.len() < len_before + } + + /// Returns a snapshot (cloned Vec) of all todos for rendering. + fn list(&self) -> Vec { + self.todos.lock().unwrap().clone() + } +} + +/// Takes a slice of todos and generates the full HTML String response, +/// including a new-todo input form and HTMX triggers for toggling/deleting. +fn render_todo_page(todos: &[Todo]) -> String { + html! { + (DOCTYPE) + html lang="en" { + head { + meta charset="UTF-8"; + meta name="viewport" content="width=device-width, initial-scale=1.0"; + title { "Rust + HTMX + Tailwind Todos" } + script src="https://cdn.tailwindcss.com" {} + script src="https://unpkg.com/htmx.org@1.9.10" {} + } + body class="bg-slate-50 text-slate-800 min-h-screen flex items-center justify-center" { + div class="max-w-md w-full bg-white rounded-xl shadow-md p-6 m-4" { + h1 class="text-2xl font-bold text-slate-900 mb-6 text-center" { "My Todo List" } + + // 1. Input Form to create a new todo + form + hx-post="/todos" + hx-target="#todo-list" + hx-swap="beforeend" + class="flex gap-2 mb-6" + { + input + type="text" + name="title" + placeholder="Add a new todo..." + required + class="flex-1 px-3 py-2 border border-slate-300 rounded-lg focus:outline-none focus:ring-2 focus:ring-blue-500 text-sm"; + button + type="submit" + class="bg-blue-600 text-white px-4 py-2 rounded-lg text-sm font-medium hover:bg-blue-700 transition-colors" + { + "Add" + } + } + + // 2. Todo List Container + div id="todo-list" class="space-y-3" { + @for todo in todos { + (render_todo_item(todo)) + } + } + } + } + } + }.into_string() +} + +/// Renders an individual todo item (useful to reuse when returning a single updated item via HTMX) +fn render_todo_item(todo: &Todo) -> maud::Markup { + let text_style = if todo.completed { + "line-through text-slate-400" + } else { + "text-slate-700" + }; + + html! { + div class="flex items-center justify-between p-3 bg-slate-100 rounded-lg border border-slate-200 todo" { + div class="flex items-center space-x-3" { + input + type="checkbox" + checked[todo.completed] + // HTMX attribute to toggle completion on the server + hx-patch=(format!("/todos/{}/toggle", todo.id)) + hx-target="closest div.todo" + hx-swap="outerHTML" + class="w-4 h-4 text-blue-600 rounded border-slate-300 focus:ring-blue-500 cursor-pointer"; + span class=(text_style) { + (todo.title) + } + } + button + class="text-red-500 hover:text-red-700 text-sm font-medium transition-colors" + hx-delete=(format!("/todos/{}", todo.id)) + hx-target="closest div.flex" + hx-swap="outerHTML" + { + "Delete" + } + } + } +} + +#[get("/")] +fn index(store: &State) -> RawHtml { + let todos = store.list(); + RawHtml(render_todo_page(&todos)) +} + +#[derive(FromForm)] +struct CreateRequest { + title: String, +} + +#[post("/todos", data = "")] +fn create_todo(request: Form, store: &State) -> RawHtml { + let todo = store.add(request.title.clone()); + RawHtml(render_todo_item(&todo).into_string()) +} + +#[patch("/todos//toggle")] +fn toggle_todo(id: u32, store: &State) -> RawHtml { + match store.toggle(id) { + Some(todo) => RawHtml(render_todo_item(&todo).into_string()), + None => RawHtml(String::new()), + } +} + +#[delete("/todos/")] +fn delete_todo(id: u32, store: &State) -> RawHtml { + store.delete(id); + RawHtml(String::new()) +} + +#[launch] +fn rocket() -> _ { + let args: Vec = env::args().collect(); + + let program = &args[0]; + + println!("Program: {}", program); + + if let Some(command) = args.get(1) { + println!("Command: {}", command); + match command.as_str() { + "add" => { + println!("command"); + // parse -m flag value + }, + _ => todo!() + } + } + + rocket::build() + .manage(TodoStore::new()) + .mount("/", routes![index, create_todo, delete_todo, toggle_todo]) +}