Catalogue.fromFirestore constructor

Catalogue.fromFirestore(Map catalogueMap)

Constructor for the creation of the catalogue when downloaded from Firestore

Implementation 

Catalogue.fromFirestore(Map catalogueMap) {
  catalogue = _catalogueInitializer();
  for (int i = 0; i < catalogue.length; ++i) {
    if (catalogueMap[i.toString()] != null) {
      catalogue[i] = _catalogueMapLister(catalogueMap[i.toString()]);
    }
  }
}