private async Task <IDataModel> GetFromCacheOrApi(int item, string dataModelType)
{
IDataModel isCached = Cache.GetItem(item);
IDataModel result;
if (isCached != null)
{
result = isCached;
}
else
{
string url = BaseItemUrl + item.ToString();
if (dataModelType == "story")
{
result = await HackerNewsApi.ApiHandler <StoryModel>(url);
}
else
{
result = await HackerNewsApi.ApiHandler <CommentModel>(url);
}
if (result != null)
{
Cache.AddItem(result);
}
}
return(result);
}
public async Task <GetStoriesResponse> GetStories(string storyType, int count, int id = 0, string order = "asc")
{
if (CurrentStoryType != storyType)
{
CurrentStoryType = storyType;
string url = BaseStoryUrl + CurrentStoryType;
CurrentCollectionIds = await HackerNewsApi.ApiHandler <List <int> >(url);
}
int index = 0;
if (id != 0)
{
//chequear si el id existe en la lista
index = CurrentCollectionIds.FindIndex(a => a == id);
if (order == "desc")
{
index -= count;
}
}
if (index + count > CurrentCollectionIds.Count)
{
count = CurrentCollectionIds.Count - index;
}
List <int> resultRange = CurrentCollectionIds.GetRange(index, count);
List <StoryModel> storiesCollection = new List <StoryModel>();
foreach (var item in resultRange)
{
StoryModel result = await GetFromCacheOrApi(item, "story") as StoryModel;
storiesCollection.Add(result);
}
return(new GetStoriesResponse
{
StoriesCollection = storiesCollection,
NextItem = CheckIfNextItem(resultRange)
});
}