private void initCache(List<SectionModel> sections) {
if (!CommonUtil.isEmpty(sections)) {
int size = sections.size();
mTopSections = new ArrayList<>(size);
mDetailSections = new HashMap<>(size);
}
}
private void initCache(RawViaplayModel model) {
if (model != null && !CommonUtil.isEmpty(model.getSections())) {
int size = model.getSections().size();
mTopSections = new ArrayList<>(size);
mDetailSections = new HashMap<>(size);
}
}
@WorkerThread
public void getSpecificSection(
Context context, int sectionPos, OnSectionDetailReadyListener listener) {
SectionModel section = mTopSections.get(sectionPos);
String sectionName = section.getName();
if (CommonUtil.isEmpty(mDetailSections) || !mDetailSections.containsKey(sectionName)) {
if (CommonUtil.checkInternetConnection(context)) {
// try downloading data from web
RawViaplayModel detail = null;
try {
detail = getSectionFromWeb(section.getUrl());
populateSectionDetailCache(section, detail);
returnSectionDetailToListener(sectionName, listener);
DatabaseManager.getInstance()
.saveDataToDb(SectionDetailModel.generateFrom(detail, section));
} catch (IOException e) {
Log.e(TAG, "Error while downloading section");
}
} else {
// try retrieving data from db
SectionDetailModel detail = DatabaseManager.getInstance().getSectionDetailFromDb(section);
populateSectionDetailCache(section, detail);
returnSectionDetailToListener(sectionName, listener);
}
} else {
Log.d(TAG, "Retrieving data from cache");
returnSectionDetailToListener(sectionName, listener);
}
}
@WorkerThread
public void getAllSections(Context context, OnAllSectionsReadyListener listener) {
if (CommonUtil.isEmpty(mTopSections)) {
if (CommonUtil.checkInternetConnection(context)) {
// try getting data from web
RawViaplayModel model = null;
try {
model = getAllSectionsFromWeb();
initCache(model);
populateTopSectionsCache(model);
returnAllSectionsToListener(listener);
DatabaseManager.getInstance().saveDataToDb(mTopSections);
} catch (IOException e) {
Log.e(TAG, "Error while retrieving data from web");
}
} else {
// try getting data from db
List<SectionModel> models = DatabaseManager.getInstance().getAllSectionsFromDb();
initCache(models);
populateTopSectionsCache(models);
returnAllSectionsToListener(listener);
}
} else {
Log.d(TAG, "Retrieving data from cache");
returnAllSectionsToListener(listener);
}
}
private RawViaplayModel getAllSectionsFromWeb() throws IOException {
Log.d(TAG, "Retrieving data from web api");
RawViaplayModel model = null;
Call<RawViaplayModel> call = mApiInterface.getAllSections();
Response<RawViaplayModel> response = call.execute();
if (response != null
&& response.body() != null
&& !CommonUtil.isEmpty(response.body().getSections())) {
model = response.body();
}
return model;
}
private void returnAllSectionsToListener(OnAllSectionsReadyListener listener) {
if (listener != null && !CommonUtil.isEmpty(mTopSections))
listener.onAllSectionsReady(Collections.unmodifiableList(mTopSections));
}
private void populateTopSectionsCache(List<SectionModel> sections) {
if (!CommonUtil.isEmpty(sections)) mTopSections.addAll(sections);
}