DataPack

datapack.ts

export class DataPack {
  _subscriptions: Map<string, Function> = new Map();

  subscribe(name, query, callback) {
    this.unsubscribe(name);
    this._subscriptions.set(name, query.onSnapshot(callback));
  }

  unsubscribe(name) {
    let sub = this._subscriptions.get(name);
    if (sub !== undefined) {
      sub(); // Removes the sub
    }
  }

  unsubscribeAll() {
    this._subscriptions.forEach((value, key) => {});
    this._subscriptions.clear();
  }
}