/// <summary>
/// Constructor for the recommender class.
/// </summary>
public Recommender()
{
// Initialise the helpers.
NewsApiHelper = new NewsApiHelper("<YourNewsApiKey>");
SpotifyAPIHelper = new SpotifyAPIHelper();
KeywordHelper = new KeywordHelper();
}
/// <summary>
/// Function to add user interest in MainFeed
/// </summary>
/// <param name="interest">Takes in an interest</param>
public async Task AddUserInterest(Interest interest)
{
try
{
var addableTabItem = new Tab {
Title = interest.Title, ArticlePage = 1
};
var articles = await NewsApiHelper.SearchArticles(new string[] { interest.Title.ToLower() });
addableTabItem.Articles.AddRange(articles);
addableTabItem.IsBusy = false;
MainFeedViewModel.Instance.TabItems.Insert(MainFeedViewModel.Instance.TabItems.IndexOf(MainFeedViewModel.Instance.TabItems.LastOrDefault()) + 1, addableTabItem);
}
catch (Exception ex)
{
Debug.WriteLine(ex.Message);
}
}
/// <summary>
/// Method to search articles depending on Interest Key words
/// </summary>
/// <param name="tab">Takes in a Tab Item</param>
/// <param name="isRefreshing">True if page is being refreshed</param>
async Task SearchArticles(Tab tab, bool isRefreshing = false)
{
tab.HasError = false;
try
{
if (tab.Articles.Count == 0)
{
tab.IsBusy = true;
var articles = await NewsApiHelper.SearchArticles(new string[] { tab.Title.ToLower() }, page : tab.ArticlePage);
tab.Articles.AddRange(articles);
tab.IsBusy = false;
}
else if (isRefreshing)
{
tab.IsRefreshing = true;
var articles = await NewsApiHelper.SearchArticles(new string[] { tab.Title.ToLower() }, page : tab.ArticlePage);
tab.Articles.ReplaceRange(articles);
tab.IsRefreshing = false;
}
if (tab.Articles.Count == 0)
{
tab.IsRefreshing = false;
tab.IsBusy = false;
tab.HasError = true;
}
}
catch (Exception ex)
{
Debug.WriteLine(ex.Message);
tab.IsRefreshing = false;
tab.IsBusy = false;
tab.HasError = true;
}
}
/// <summary>
/// Method to fetch TopHeadlines by Category
/// </summary>
/// <param name="tab">Takes in a Tab Item</param>
/// <param name="isRefreshing">True if page is being refreshed</param>
async Task GetWorldTopHeadlinesByCategory(Tab tab, Categories category, bool isRefreshing = false)
{
tab.HasError = false;
try
{
if (tab.Articles.Count == 0)
{
tab.IsBusy = true;
var articles = await NewsApiHelper.GetWorldTopHeadlinesByCategory(category : category, page : tab.ArticlePage);
tab.Articles.AddRange(articles);
tab.IsBusy = false;
}
else if (isRefreshing)
{
tab.IsRefreshing = true;
var articles = await NewsApiHelper.GetWorldTopHeadlinesByCategory(category : category, page : tab.ArticlePage);
tab.Articles.ReplaceRange(articles);
tab.IsRefreshing = false;
}
if (tab.Articles.Count == 0)
{
tab.IsRefreshing = false;
tab.IsBusy = false;
tab.HasError = true;
}
}
catch (Exception ex)
{
Debug.WriteLine(ex.Message);
tab.IsRefreshing = false;
tab.IsBusy = false;
tab.HasError = true;
}
}
/// <summary>
/// Saves users Interests in the database and locally
/// </summary>
/// <param name="interest"></param>
public async Task AddUserInterest(Interest interest)
{
try
{
interest.Title = interest.Title.ToLower();
var userInterestsList = DatabaseHelper.GetSavedInterestsList();
if (userInterestsList == null)
{
userInterestsList = new List <Interest>();
}
userInterestsList.Add(interest);
string userInterestsJson = JsonConvert.SerializeObject(userInterestsList);
Settings.AddSetting(Settings.AppPrefrences.Interests, userInterestsJson);
var addableTabItem = new Tab {
Title = interest.Title, ArticlePage = 1
};
var articles = await NewsApiHelper.SearchArticles(new string[] { interest.Title.ToLower() });
addableTabItem.Articles.AddRange(articles);
addableTabItem.IsBusy = false;
MainFeedViewModel.Instance.TabItems.Insert(MainFeedViewModel.Instance.TabItems.IndexOf(MainFeedViewModel.Instance.TabItems.LastOrDefault()) + 1, addableTabItem);
string isloggedIn = Settings.GetSetting(Settings.AppPrefrences.IsLoggedIn);
if (isloggedIn != null || isloggedIn != "False")
{
await DatabaseHelper.UpdateUserInterests(userInterestsList).ConfigureAwait(false);
}
}
catch (Exception ex)
{
Debug.WriteLine(ex.Message);
}
}