mirror of
https://github.com/logos-messaging/logos-delivery-rust-bindings.git
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69a48725ca
* refactor: node handle constructor and messageId on publish * refactor: add back typestate * chore: rename messageId to messageHash
70 lines
2.4 KiB
Rust
70 lines
2.4 KiB
Rust
//! Waku message [event](https://rfc.vac.dev/spec/36/#events) related items
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//!
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//! Asynchronous events require a callback to be registered.
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//! An example of an asynchronous event that might be emitted is receiving a message.
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//! When an event is emitted, this callback will be triggered receiving an [`Event`]
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// std
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use std::ffi::c_void;
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// crates
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use serde::{Deserialize, Serialize};
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// internal
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use crate::general::WakuMessage;
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use crate::node::context::WakuNodeContext;
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use crate::utils::{get_trampoline, LibwakuResponse};
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use crate::MessageHash;
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/// Waku event
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/// For now just WakuMessage is supported
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#[non_exhaustive]
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#[derive(Serialize, Deserialize)]
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#[serde(tag = "eventType", rename_all = "camelCase")]
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pub enum Event {
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#[serde(rename = "message")]
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WakuMessage(WakuMessageEvent),
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Unrecognized(serde_json::Value),
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}
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/// Type of `event` field for a `message` event
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#[derive(Serialize, Deserialize)]
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#[serde(rename_all = "camelCase")]
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pub struct WakuMessageEvent {
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/// The pubsub topic on which the message was received
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pub pubsub_topic: String,
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/// The message hash
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pub message_hash: MessageHash,
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/// The message in [`WakuMessage`] format
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pub waku_message: WakuMessage,
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}
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/// Register callback to act as event handler and receive application events,
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/// which are used to react to asynchronous events in Waku
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pub fn waku_set_event_callback<F: FnMut(Event) + Send + Sync>(ctx: &WakuNodeContext, mut f: F) {
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let cb = |response: LibwakuResponse| {
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if let LibwakuResponse::Success(v) = response {
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let data: Event =
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serde_json::from_str(v.unwrap().as_str()).expect("Parsing event to succeed");
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f(data);
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};
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};
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unsafe {
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let mut closure = cb;
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let cb = get_trampoline(&closure);
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waku_sys::waku_set_event_callback(ctx.obj_ptr, cb, &mut closure as *mut _ as *mut c_void)
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};
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}
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#[cfg(test)]
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mod tests {
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use crate::Event;
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#[test]
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fn deserialize_message_event() {
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let s = "{\"eventType\":\"message\",\"messageHash\":\"0x26ff3d7fbc950ea2158ce62fd76fd745eee0323c9eac23d0713843b0f04ea27c\",\"pubsubTopic\":\"/waku/2/default-waku/proto\",\"wakuMessage\":{\"payload\":\"SGkgZnJvbSDwn6aAIQ==\",\"contentTopic\":\"/toychat/2/huilong/proto\",\"timestamp\":1665580926660}}";
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let evt: Event = serde_json::from_str(s).unwrap();
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assert!(matches!(evt, Event::WakuMessage(_)));
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}
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}
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