js/speaker.js

44 lines
754 B
JavaScript
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class Speaker {
#callbacks = new Set()
#immediate
#scheduled = []
#current
constructor(immediate, current=[]) {
this.#immediate = immediate
this.#current = current
}
listen(callback) {
this.#callbacks.add(callback)
return this.#current
}
speak(...args) {
this.#current = args
if (this.#immediate) {
for (let callback of this.#callbacks) {
callback(...args)
}
} else {
if (!this.#scheduled.length) {
queueMicrotask(() => {
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for (let args of this.#scheduled) {
for (let callback of this.#callbacks) {
callback(...args)
}
}
this.#scheduled = []
})
}
this.#scheduled.push(args)
}
}
silence(callback) {
this.#callbacks.delete(callbacks)
}
}
export default Speaker