bazzar/web/src/lib.rs

pub mod api;
mod i18n;
mod model;
mod pages;
pub mod shared;

use seed::empty;
use seed::prelude::*;

use crate::model::Model;
use crate::pages::{Msg, Page, PublicPage};

macro_rules! fetch_page {
    (public $model: expr, $page: ident, $ret: expr) => {{
        let p = match &mut $model.page {
            crate::pages::Page::Public(p) => p,
            _ => return $ret,
        };
        match p {
            crate::pages::PublicPage::$page(p) => p,
            _ => return $ret,
        }
    }};
}

fn init(url: Url, orders: &mut impl Orders<Msg>) -> Model {
    Model {
        token: LocalStorage::get("auth-token").ok(),
        page: Page::Public(PublicPage::Listing(pages::public::listing::init(
            url,
            &mut orders.proxy(proxy_public_listing),
        ))),
    }
}

fn update(msg: Msg, model: &mut Model, orders: &mut impl Orders<Msg>) {
    match msg {
        Msg::UrlChanged(subs::UrlChanged(url)) => model.page = Page::init(url, orders),
        Msg::Public(pages::public::Msg::Listing(msg)) => {
            let page = fetch_page!(public model, Listing, ());
            pages::public::listing::update(msg, page, &mut orders.proxy(proxy_public_listing));
        }
    }
}

fn view(model: &Model) -> Node<Msg> {
    match &model.page {
        Page::Public(PublicPage::Listing(page)) => pages::public::listing::view(&page)
            .map_msg(|msg| Msg::Public(pages::public::Msg::Listing(msg))),
        _ => empty![],
    }
}

#[wasm_bindgen(start)]
pub fn start() {
    App::start("main", init, update, view);
}

fn proxy_public_listing(msg: pages::public::listing::Msg) -> Msg {
    Msg::Public(pages::public::Msg::Listing(msg))
}