lykin/src/routes.rs

use async_std::channel::Sender;
use log::{debug, warn};
use markdown;
use rocket::{form::Form, get, post, response::Redirect, uri, FromForm, State};
use rocket_dyn_templates::{tera::Context, Template};
use uri_encode;

use crate::{db::Database, sbot, task_loop::Task, utils, WhoAmI};

#[derive(FromForm)]
pub struct Peer {
    pub public_key: String,
}

#[get("/")]
pub async fn home(db: &State<Database>) -> Template {
    let peers = db.get_peers();

    let mut context = Context::new();
    context.insert("peers", &peers);

    Template::render("base", &context.into_json())
}

#[get("/posts/<public_key>")]
pub async fn posts(db: &State<Database>, public_key: &str) -> Template {
    let peers = db.get_peers();
    let posts = db.get_posts(public_key).unwrap();

    let mut context = Context::new();
    context.insert("selected_peer", &public_key);
    context.insert("peers", &peers);
    context.insert("posts", &posts);

    Template::render("base", &context.into_json())
}

#[get("/posts/<public_key>/<msg_id>")]
pub async fn post(db: &State<Database>, public_key: &str, msg_id: &str) -> Template {
    let peers = db.get_peers();
    let posts = db.get_posts(public_key).unwrap();
    let post = db.get_post(public_key, msg_id).unwrap();

    let mut context = Context::new();
    context.insert("selected_peer", &public_key);
    context.insert(
        "selected_peer_encoded",
        &uri_encode::encode_uri_component(public_key),
    );
    context.insert("selected_post", &msg_id);
    context.insert(
        "selected_post_encoded",
        &uri_encode::encode_uri_component(msg_id),
    );
    context.insert("peers", &peers);
    context.insert("posts", &posts);
    // TODO: consider converting markdown to html here
    context.insert("post", &post);
    context.insert("post_is_selected", &true);

    Template::render("base", &context.into_json())
}

#[get("/posts/<public_key>/<msg_id>/read")]
pub async fn mark_post_read(db: &State<Database>, public_key: &str, msg_id: &str) -> Redirect {
    // Retrieve the post from the database, mark it as read and reinsert it.
    if let Ok(Some(mut post)) = db.get_post(public_key, msg_id) {
        post.read = true;
        db.add_post(public_key, post).unwrap();
    } else {
        warn!(
            "failed to find post {} authored by {} in database",
            msg_id, public_key
        )
    }

    Redirect::to(uri!(post(public_key, msg_id)))
}

#[get("/posts/<public_key>/<msg_id>/unread")]
pub async fn mark_post_unread(db: &State<Database>, public_key: &str, msg_id: &str) -> Redirect {
    // Retrieve the post from the database, mark it as unread and reinsert it.
    if let Ok(Some(mut post)) = db.get_post(public_key, msg_id) {
        post.read = false;
        db.add_post(public_key, post).unwrap();
    } else {
        warn!(
            "failed to find post {} authored by {} in database",
            msg_id, public_key
        )
    }

    Redirect::to(uri!(post(public_key, msg_id)))
}

#[post("/subscribe", data = "<peer>")]
pub async fn subscribe_form(
    db: &State<Database>,
    whoami: &State<WhoAmI>,
    tx: &State<Sender<Task>>,
    peer: Form<Peer>,
) -> Redirect {
    if utils::validate_public_key(&peer.public_key).is_ok() {
        debug!("public key {} is valid", &peer.public_key);
        // TODO: consider getting the peer name here so we can insert it
        match db.add_peer(&peer.public_key) {
            Ok(_) => {
                debug!("added {} to peer tree in database", &peer.public_key);
                // TODO: i don't think we actually want to follow...
                // we might still have the data in our ssb db, even if we don't follow
                match sbot::is_following(&whoami.public_key, &peer.public_key).await {
                    Ok(status) if status.as_str() == "false" => {
                        match sbot::follow_peer(&peer.public_key).await {
                            Ok(_) => debug!("followed {}", &peer.public_key),
                            Err(e) => warn!("failed to follow {}: {}", &peer.public_key, e),
                        }
                    }
                    Ok(status) if status.as_str() == "true" => {
                        debug!("we already follow {}", &peer.public_key)
                    }
                    _ => (),
                }
                let peer = peer.public_key.to_string();
                // Fetch all root posts authored by the peer we're subscribing
                // to. Posts will be added to the key-value database.
                if let Err(e) = tx.send(Task::FetchAll(peer)).await {
                    warn!("task loop error: {}", e)
                }
            }
            Err(_e) => warn!(
                "failed to add {} to peer tree in database",
                &peer.public_key
            ),
        }
    } else {
        warn!("{} is invalid", &peer.public_key);
    }

    Redirect::to(uri!(home))
}

#[post("/unsubscribe", data = "<peer>")]
pub fn unsubscribe_form(db: &State<Database>, peer: Form<Peer>) -> Redirect {
    // validate the public key
    match utils::validate_public_key(&peer.public_key) {
        Ok(_) => {
            debug!("public key {} is valid", &peer.public_key);
            match db.remove_peer(&peer.public_key) {
                Ok(_) => debug!("removed {} from peer tree in database", &peer.public_key),
                Err(_e) => warn!(
                    "failed to remove {} from peer tree in database",
                    &peer.public_key
                ),
            }
        }
        Err(e) => warn!("{} is invalid: {}", &peer.public_key, e),
    }

    Redirect::to(uri!(home))
}