private List<Track> getUnderratedPlaylist(List<Track> tempTrackList) {
Log.d(TAG, "getUnderratedPlaylist()");
List<Track> tempList = new ArrayList<Track>();
/**
* referring to how many times does a song need to be played/selected before it is not a rookie
* TODO XZ: in future, this should be a relative number such as top played song is at 100
* completeCount hence an underrated song would be, say maxCount * 0.4?
*/
int rookieThreshold = 10;
if (!tempTrackList.isEmpty()) {
Collections.shuffle(tempTrackList);
for (Track t : tempTrackList) {
int completedCount = t.getCompletedCount();
int skippedCount = t.getSkippedCount();
int selectedCount = t.getSelectedCount();
int likedCount = t.getLikedCount();
int dislikedCount = t.getDislikedCount();
if (completedCount + selectedCount < rookieThreshold) {
if (selectedCount > 2) {
if (skippedCount <= completedCount) {
tempList.add(t);
}
} else {
if (completedCount > 2) {
tempList.add(t);
} else {
if (likedCount > dislikedCount) {
tempList.add(t);
}
}
}
}
if (tempList.size() == 10) {
break;
}
}
}
Log.d(TAG, "tempList.size():" + tempList.size());
return tempList;
}
private List<Track> getGeneralPlaylist(List<Track> tempTrackList) {
List<Track> tempList = new ArrayList<Track>();
if (tempTrackList != null) {
Collections.sort(
tempTrackList,
new Comparator<Track>() {
@Override
public int compare(Track left, Track right) {
return (left.getCompletedCount() + left.getSkippedCount())
- (right.getCompletedCount() + right.getSkippedCount());
}
});
Iterator<Track> iter = tempTrackList.iterator();
while (iter.hasNext()) {
Track newTrack = iter.next();
if (newTrack.getSkippedCount() + newTrack.getCompletedCount() > 3) {
break;
}
if (Math.random() > 0.2) {
tempList.add(newTrack);
iter.remove();
if (tempTrackList.size() > 3) {
break;
}
}
}
Collections.shuffle(tempTrackList);
for (Track t : tempTrackList) {
// Log.d(TAG, "t.getTitle(): " + t.getTitle());
int completedCount = t.getCompletedCount();
int skippedCount = t.getSkippedCount();
// res.where().equalTo("type", TrackStats.SONG_SELECTED) //TODO not implemented yet
int likedCount = t.getLikedCount();
int dislikedCount = t.getDislikedCount();
/**
* TODO need to make the ratio more representative of the respective counts i.e. if i
* completed the song once, it should only give like 0.6 but if i completed the song 100
* times, it should give like 0.9?
*/
int comMinusSkip = completedCount - skippedCount;
double cmsRatio = 0;
if (comMinusSkip > 0) {
cmsRatio = 0.9;
} else {
if (comMinusSkip == 0) {
cmsRatio = 0.5;
} else {
cmsRatio = 0.1;
}
}
// TODO similarly as above, this algo needs rework in future
int likeMinusDislike = likedCount - dislikedCount;
double lmdRatio = 0;
if (likeMinusDislike > 0) {
lmdRatio = 0.9;
} else {
if (likeMinusDislike == 0) {
lmdRatio = 0.5;
} else {
lmdRatio = 0.1;
}
}
// XZ: it should add up to 100 in total
final double chanceContributionWeightage = 50;
final double completedVsSkippedContributionWeightage = 20;
final double likeDislikeContributionWeightage = 30;
double chanceContribution = chanceContributionWeightage * Math.random();
double completedVsSkippedContribution = completedVsSkippedContributionWeightage * cmsRatio;
double likeDislikeContribution = likeDislikeContributionWeightage * lmdRatio;
// double selectedContribution = 20; //TODO *WIP*
// double freshnessContribution = 20; //TODO *WIP*
double points =
chanceContribution + completedVsSkippedContribution + likeDislikeContribution;
if (points > PASSING_GRADE) {
tempList.add(t);
}
if (tempList.size() == 10) {
break;
}
}
}
return tempList;
}