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The viewmodels have been modified to not repeat calls to the backend during the lifecycle of the fragment

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This commit is contained in:
antonio 2022-09-05 08:21:01 +02:00
parent 6817fa739e
commit 8b883c88fc
6 changed files with 87 additions and 46 deletions
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75
app/src/main/java/com/cappielloantonio/play/viewmodel/HomeViewModel.java
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@ -56,67 +56,98 @@ public class HomeViewModel extends AndroidViewModel {
artistRepository = new ArtistRepository(application);
playlistRepository = new PlaylistRepository(application);
podcastRepository = new PodcastRepository(application);
songRepository.getRandomSample(10, null, null).observeForever(dicoverSongSample::postValue);
songRepository.getStarredSongs(true, 10).observeForever(starredTracksSample::postValue);
artistRepository.getStarredArtists(true, 10).observeForever(starredArtistsSample::postValue);
}
public LiveData<List<Media>> getDiscoverSongSample() {
public LiveData<List<Media>> getDiscoverSongSample(LifecycleOwner owner) {
if (dicoverSongSample.getValue() == null) {
songRepository.getRandomSample(10, null, null).observe(owner, dicoverSongSample::postValue);
}
return dicoverSongSample;
}
public LiveData<List<Album>> getRecentlyReleasedAlbums(LifecycleOwner owner) {
int currentYear = Calendar.getInstance().get(Calendar.YEAR);
if (newReleasedAlbum.getValue() == null) {
int currentYear = Calendar.getInstance().get(Calendar.YEAR);
albumRepository.getAlbums("byYear", 500, currentYear, currentYear).observe(owner, albums -> {
albums.sort(Comparator.comparing(Album::getCreated).reversed());
newReleasedAlbum.postValue(albums.subList(0, Math.min(20, albums.size())));
});
albumRepository.getAlbums("byYear", 500, currentYear, currentYear).observe(owner, albums -> {
albums.sort(Comparator.comparing(Album::getCreated).reversed());
newReleasedAlbum.postValue(albums.subList(0, Math.min(20, albums.size())));
});
}
return newReleasedAlbum;
}
public LiveData<List<Media>> getStarredTracksSample() {
public LiveData<List<Media>> getStarredTracksSample(LifecycleOwner owner) {
if (starredTracksSample.getValue() == null) {
songRepository.getStarredSongs(true, 10).observe(owner, starredTracksSample::postValue);
}
return starredTracksSample;
}
public LiveData<List<Artist>> getStarredArtistsSample() {
public LiveData<List<Artist>> getStarredArtistsSample(LifecycleOwner owner) {
if (starredArtistsSample.getValue() == null) {
artistRepository.getStarredArtists(true, 10).observe(owner, starredArtistsSample::postValue);
}
return starredArtistsSample;
}
public LiveData<List<Media>> getStarredTracks(LifecycleOwner owner) {
songRepository.getStarredSongs(true, 20).observe(owner, starredTracks::postValue);
if (starredTracks.getValue() == null) {
songRepository.getStarredSongs(true, 20).observe(owner, starredTracks::postValue);
}
return starredTracks;
}
public LiveData<List<Album>> getStarredAlbums(LifecycleOwner owner) {
albumRepository.getStarredAlbums(true, 20).observe(owner, starredAlbums::postValue);
if (starredAlbums.getValue() == null) {
albumRepository.getStarredAlbums(true, 20).observe(owner, starredAlbums::postValue);
}
return starredAlbums;
}
public LiveData<List<Artist>> getStarredArtists(LifecycleOwner owner) {
artistRepository.getStarredArtists(true, 20).observe(owner, starredArtists::postValue);
if (starredArtists.getValue() == null) {
artistRepository.getStarredArtists(true, 20).observe(owner, starredArtists::postValue);
}
return starredArtists;
}
public LiveData<List<Integer>> getYearList(LifecycleOwner owner) {
albumRepository.getDecades().observe(owner, years::postValue);
if (years.getValue() == null) {
albumRepository.getDecades().observe(owner, years::postValue);
}
return years;
}
public LiveData<List<Album>> getMostPlayedAlbums(LifecycleOwner owner) {
albumRepository.getAlbums("frequent", 20, null, null).observe(owner, mostPlayedAlbumSample::postValue);
if (mostPlayedAlbumSample.getValue() == null) {
albumRepository.getAlbums("frequent", 20, null, null).observe(owner, mostPlayedAlbumSample::postValue);
}
return mostPlayedAlbumSample;
}
public LiveData<List<Album>> getMostRecentlyAddedAlbums(LifecycleOwner owner) {
albumRepository.getAlbums("newest", 20, null, null).observe(owner, recentlyAddedAlbumSample::postValue);
if (recentlyAddedAlbumSample.getValue() == null) {
albumRepository.getAlbums("newest", 20, null, null).observe(owner, recentlyAddedAlbumSample::postValue);
}
return recentlyAddedAlbumSample;
}
public LiveData<List<Album>> getRecentlyPlayedAlbumList(LifecycleOwner owner) {
albumRepository.getAlbums("recent", 20, null, null).observe(owner, recentlyPlayedAlbumSample::postValue);
if (recentlyPlayedAlbumSample.getValue() == null) {
albumRepository.getAlbums("recent", 20, null, null).observe(owner, recentlyPlayedAlbumSample::postValue);
}
return recentlyPlayedAlbumSample;
}
@ -126,6 +157,7 @@ public class HomeViewModel extends AndroidViewModel {
List<Playlist> subPlaylist = playlists.subList(0, Math.min(maxNumber, playlists.size()));
pinnedPlaylists.postValue(subPlaylist);
});
return pinnedPlaylists;
}
@ -134,7 +166,10 @@ public class HomeViewModel extends AndroidViewModel {
}
public LiveData<List<Media>> getNewestPodcastEpisodes(LifecycleOwner owner) {
podcastRepository.getNewestPodcastEpisodes(20).observe(owner, newestPodcastEpisodes::postValue);
if (newestPodcastEpisodes.getValue() == null) {
podcastRepository.getNewestPodcastEpisodes(20).observe(owner, newestPodcastEpisodes::postValue);
}
return newestPodcastEpisodes;
}