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class Dispatcher {
constructor() {
this.listeners = [];
}
dispatch = (topic, payload) => {
this.listeners.filter(l => l.topic === topic).forEach(l => l.callback(payload));
};
register = (topic, callback) => {
if (typeof callback !== "function") {
throw new Error("dispatcher callback must be a function");
}
if (typeof topic === "string") {
this.listeners.push({topic, callback});
} else if (typeof topic === "object" && Array.isArray(topic)) {
topic.forEach(e => {
if (typeof e !== "string") {
throw new Error("all topics must be strings");
}
});
topic.forEach(e => this.listeners.push({e, callback}));
} else {
throw new Error("topic must be a string or an array of strings");
}
};
}
const dispatcher = new Dispatcher();
export default dispatcher;
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