/**
* Gets recommendations for the currently logged in user.
*
* @return An array containing the recommendations
*/
public Medium[] getRecommendedMedia() {
User u = Database.getInstance().getLoggedInUser();
if (u == null) return null;
LinkedList<Medium> recommendedMedia = new LinkedList<>();
// Get favorite genre
HashMap<Genre, Integer> mediumCounts = new HashMap<>();
Integer count;
int maxCount = -1;
Genre favoriteGenre = null;
for (Medium m : u.getFavoriteMediums()) {
count = mediumCounts.get(m.getGenre());
if (count == null) {
count = 1;
} else {
count++;
}
mediumCounts.put(m.getGenre(), count);
if (count > maxCount) {
maxCount = count;
favoriteGenre = m.getGenre();
}
}
// Use topgenre if no favorite genre was found
if (favoriteGenre == null) {
favoriteGenre = Database.getInstance().getTopGenre();
}
// Get a song out of the favorite genre that is not rated yet
for (Medium m : favoriteGenre.getMedia()) {
if (m.getRatingList().get(u.hashCode()) == null) {
recommendedMedia.add(m);
}
}
// Return random top 10
Collections.shuffle(recommendedMedia);
recommendedMedia =
new LinkedList(recommendedMedia.subList(0, Math.min(recommendedMedia.size(), 10)));
Medium[] result = new Medium[recommendedMedia.size()];
recommendedMedia.toArray(result);
return result;
}