Bot API (#27)

Basically make the `azalea` crate have stuff

1 files changed, 81 insertions, 1 deletions

diff --git a/azalea/src/lib.rs b/azalea/src/lib.rs
index fe8a3740..8ef02e7c 100644
--- a/azalea/src/lib.rs
+++ b/azalea/src/lib.rs
@@ -1,4 +1,84 @@
 mod bot;
 pub mod prelude;
 
-pub use azalea_client::Client;
+use async_trait::async_trait;
+pub use azalea_client::*;
+use azalea_protocol::ServerAddress;
+use parking_lot::Mutex;
+use std::{future::Future, sync::Arc};
+use thiserror::Error;
+
+/// Plugins can keep their own personal state, listen to events, and add new functions to Client.
+#[async_trait]
+pub trait Plugin: Send + Sync {
+    async fn handle(self: Arc<Self>, bot: Client, event: Arc<Event>);
+}
+
+// pub type HeuristicFn<N, W> = fn(start: &Vertex<N, W>, current: &Vertex<N, W>) -> W;
+pub type HandleFn<Fut, S> = fn(Client, Arc<Event>, Arc<Mutex<S>>) -> Fut;
+
+pub struct Options<S, A, Fut>
+where
+    A: TryInto<ServerAddress>,
+    Fut: Future<Output = Result<(), anyhow::Error>>,
+{
+    pub address: A,
+    pub account: Account,
+    pub plugins: Vec<Arc<dyn Plugin>>,
+    pub state: Arc<Mutex<S>>,
+    pub handle: HandleFn<Fut, S>,
+}
+
+#[derive(Error, Debug)]
+pub enum Error {
+    #[error("Invalid address")]
+    InvalidAddress,
+}
+
+/// Join a Minecraft server.
+///
+/// ```no_run
+/// azalea::start(azalea::Options {
+///     account,
+///     address: "localhost",
+///     state: Arc::new(Mutex::new(State::default())),
+///     plugins: vec![&autoeat::Plugin::default()],
+///     handle: Box::new(handle),
+/// }).await.unwrap();
+/// ```
+pub async fn start<
+    S: Send + 'static,
+    A: Send + TryInto<ServerAddress>,
+    Fut: Future<Output = Result<(), anyhow::Error>> + Send + 'static,
+>(
+    options: Options<S, A, Fut>,
+) -> Result<(), Error> {
+    let address = match options.address.try_into() {
+        Ok(address) => address,
+        Err(_) => return Err(Error::InvalidAddress),
+    };
+
+    let (bot, mut rx) = options.account.join(&address).await.unwrap();
+
+    let state = options.state;
+    let bot_plugin = Arc::new(bot::Plugin::default());
+
+    while let Some(event) = rx.recv().await {
+        // we put it into an Arc so it's cheaper to clone
+        let event = Arc::new(event);
+
+        for plugin in &options.plugins {
+            tokio::spawn(plugin.clone().handle(bot.clone(), event.clone()));
+        }
+
+        {
+            let bot_plugin = bot_plugin.clone();
+            let bot = bot.clone();
+            let event = event.clone();
+            tokio::spawn(bot::Plugin::handle(bot_plugin, bot, event));
+        };
+        tokio::spawn((options.handle)(bot.clone(), event.clone(), state.clone()));
+    }
+
+    Ok(())
+}