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51 lines
1.2 KiB
Rust
51 lines
1.2 KiB
Rust
3 years ago
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use crate::error::Result;
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use crate::events::event::Event;
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use crate::ipc::context::Context;
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use std::collections::HashMap;
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use std::future::Future;
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use std::pin::Pin;
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use std::sync::Arc;
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type EventCallback = Arc<
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dyn for<'a> Fn(&'a Context, Event) -> Pin<Box<(dyn Future<Output = Result<()>> + Send + 'a)>>
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+ Send
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+ Sync,
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>;
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/// Handler for events
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#[derive(Clone)]
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pub struct EventHandler {
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callbacks: HashMap<String, EventCallback>,
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}
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impl EventHandler {
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/// Creates a new event handler
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pub fn new() -> Self {
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Self {
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callbacks: HashMap::new(),
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}
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}
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/// Adds a new event callback
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pub fn on<F: 'static>(&mut self, name: &str, callback: F)
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where
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F: for<'a> Fn(
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&'a Context,
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Event,
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) -> Pin<Box<(dyn Future<Output = Result<()>> + Send + 'a)>>
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+ Send
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+ Sync,
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{
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self.callbacks.insert(name.to_string(), Arc::new(callback));
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}
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/// Handles a received event
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pub async fn handle_event(&self, ctx: &Context, event: Event) -> Result<()> {
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if let Some(cb) = self.callbacks.get(event.name()) {
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cb.as_ref()(ctx, event).await?;
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}
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Ok(())
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}
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}
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