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sse.ts
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sse.ts
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import {
ServerSentEvent,
ServerSentEventStreamTarget,
} from "https://deno.land/[email protected]/http/unstable_server_sent_event.ts"
export class ServerSentEventStreamTargetPool<T> {
private targets: Map<string, ServerSentEventStreamTarget>
constructor() {
this.targets = new Map()
}
add(target: ServerSentEventStreamTarget) {
const id = crypto.randomUUID()
target.addEventListener("close", () => {
this.targets.delete(id)
})
this.targets.set(id, target)
return id
}
remove(id: string) {
this.targets.delete(id)
}
dispatchMessage(data: T) {
this.targets.forEach((target) => target.dispatchMessage(data))
}
dispatchEvent(event: ServerSentEvent) {
this.targets.forEach((target) => target.dispatchEvent(event))
}
dispatchComment(comment: string) {
this.targets.forEach((target) => target.dispatchComment(comment))
}
addEventListener(
type: string,
listener: EventListenerOrEventListenerObject | null,
options?: AddEventListenerOptions,
) {
this.targets.forEach((target) =>
target.addEventListener(type, listener, options)
)
}
}