Struct trillium_channels::ChannelEvent

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pub struct ChannelEvent { /* private fields */ }
Expand description

§The messages passed between server and connected clients.

ChannelEvents contain a topic, event, payload, and if sent from a client, a unique reference identifier that can be used to respond to this event.

Most interfaces in this crate take an Into<ChannelEvent> instead of a ChannelEvent directly, so that you can either implement Into for relevant types, or use these tuple From implementations:

use trillium_channels::ChannelEvent;
use serde_json::{json, Value, to_string};
let event: ChannelEvent = ("topic", "event").into();
assert_eq!(event.topic(), "topic");
assert_eq!(event.event(), "event");
assert_eq!(event.payload(), &json!({}));

let event: ChannelEvent = ("topic", "event", &json!({"some": "payload"})).into();
assert_eq!(event.topic(), "topic");
assert_eq!(event.event(), "event");
assert_eq!(to_string(event.payload()).unwrap(), r#"{"some":"payload"}"#);

#[derive(serde::Serialize)]
struct SomePayload { payload: &'static str };
let event: ChannelEvent = ("topic", "event", &SomePayload { payload: "anything" }).into();
assert_eq!(event.topic(), "topic");
assert_eq!(event.event(), "event");
assert_eq!(to_string(event.payload()).unwrap(), r#"{"payload":"anything"}"#);

Implementations§

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impl ChannelEvent

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pub fn build_reply( &self, event: impl Into<Cow<'static, str>>, payload: &impl Serialize, ) -> ChannelEvent

Construct a new ChannelEvent with the same reference as this ChannelEvent. Note that this is the only way of setting the reference on an event.

The event argument can be either a String or, more commonly, a &'static str.

The topic will always be the same as the source ChannelEvent’s topic.

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pub fn topic(&self) -> &str

Returns this ChannelEvent’s topic

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pub fn event(&self) -> &str

Returns this ChannelEvent’s event

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pub fn payload(&self) -> &Value

Returns this ChannelEvent’s payload as a Value

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pub fn reference(&self) -> Option<&str>

Returns the reference field (“ref” in json) for this ChannelEvent, if one was provided by the client

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pub fn new( topic: impl Into<Cow<'static, str>>, event: impl Into<Cow<'static, str>>, payload: &impl Serialize, ) -> Self

Constructs a new ChannelEvent from topic, event, and a serializable payload. Use &() if no payload is needed.

Note that the reference cannot be set this way. To set a reference, use ChannelEvent::build_reply

Trait Implementations§

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impl Clone for ChannelEvent

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fn clone(&self) -> ChannelEvent

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for ChannelEvent

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
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impl<'de> Deserialize<'de> for ChannelEvent

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fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>
where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer. Read more
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impl<T, E> From<(T, E)> for ChannelEvent
where T: Into<Cow<'static, str>>, E: Into<Cow<'static, str>>,

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fn from(te: (T, E)) -> Self

Converts to this type from the input type.
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impl<T, E, P> From<(T, E, P)> for ChannelEvent
where T: Into<Cow<'static, str>>, E: Into<Cow<'static, str>>, P: Serialize,

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fn from(tep: (T, E, P)) -> Self

Converts to this type from the input type.
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impl PartialEq for ChannelEvent

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fn eq(&self, other: &ChannelEvent) -> bool

This method tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl Serialize for ChannelEvent

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fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>
where __S: Serializer,

Serialize this value into the given Serde serializer. Read more
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impl Eq for ChannelEvent

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impl StructuralPartialEq for ChannelEvent

Auto Trait Implementations§

Blanket Implementations§

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> CloneToUninit for T
where T: Clone,

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default unsafe fn clone_to_uninit(&self, dst: *mut T)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dst. Read more
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impl<Q, K> Equivalent<K> for Q
where Q: Eq + ?Sized, K: Borrow<Q> + ?Sized,

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fn equivalent(&self, key: &K) -> bool

Checks if this value is equivalent to the given key. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> Same for T

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type Output = T

Should always be Self
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impl<T> ToOwned for T
where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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impl<V, T> VZip<V> for T
where V: MultiLane<T>,

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fn vzip(self) -> V

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impl<T> DeserializeOwned for T
where T: for<'de> Deserialize<'de>,