public SearchPage()
{
InitializeComponent();
vm = new SearchPageViewModel();
BindingContext = vm;
searchHandler = new NewsCategorySearchHandler();
searchHandler.SearchQueryEvent += (obj, input) => {
if (!string.IsNullOrWhiteSpace(input))
{
try
{
// filter down the binding context
var filteredCategories = new AllNewsCategories()
.Where(cat => cat.DisplayName.Contains(input.ToUpper())).ToList();
vm.NewsCategories.Clear();
vm.NewsCategories = new ObservableRangeCollection <NewsCategory>(filteredCategories);
}
catch (Exception ex)
{
System.Diagnostics.Debug.WriteLine($"***** {ex} *****");
}
}
else
{
vm.NewsCategories = new ObservableRangeCollection <NewsCategory>(new AllNewsCategories());
}
};
Shell.SetSearchHandler(this, searchHandler);
}
async Task <List <NewsCategory> > GetUsersNewsCategories()
{
try
{
var loggedIn = authService.IsLoggedIn();
if (!loggedIn)
{
return(new List <NewsCategory>());
}
var dbResult = await Data.ListAsync <UserInterests>(
DefaultPartitions.UserDocuments
);
var allNewsCats = new AllNewsCategories();
var userInterests = new List <UserInterests>();
userInterests.AddRange(dbResult.CurrentPage.Items.Select(i => i.DeserializedValue));
while (dbResult.HasNextPage)
{
await dbResult.GetNextPageAsync();
userInterests.AddRange(dbResult.CurrentPage.Items.Select(i => i.DeserializedValue));
}
foreach (var interest in userInterests)
{
var favoriteCategory = allNewsCats.First(c => c.CategoryName == interest.NewsCategoryName);
favoriteCategory.IsFavorite = true;
// add the tabs
var interestInfo = new InterestSubMessage
{
Category = favoriteCategory.CategoryName,
Title = favoriteCategory.DisplayName
};
var msg = new AddInterestTabMessage {
InterestInfo = interestInfo
};
MessagingCenter.Send(msg, AddInterestTabMessage.AddTabMessage);
}
return(allNewsCats);
}
catch (Exception ex)
{
System.Diagnostics.Debug.WriteLine(ex);
return(new List <NewsCategory>());
}
}
async Task <List <NewsCategory> > GetUsersNewsCategories()
{
try
{
var loggedIn = authService.IsLoggedIn();
if (!loggedIn)
{
return(new List <NewsCategory>());
}
var dbResult = await Data.ListAsync <UserInterest>(
DefaultPartitions.UserDocuments);
var allNewsCats = new AllNewsCategories();
var userInterests = new List <UserInterest>();
// Get first page of results
userInterests.AddRange(dbResult.CurrentPage.Items.Select(i => i.DeserializedValue));
while (dbResult.HasNextPage)
{
await dbResult.GetNextPageAsync();
userInterests.AddRange(dbResult.CurrentPage.Items.Select(i => i.DeserializedValue));
}
foreach (var interest in userInterests)
{
allNewsCats.First(c => c.CategoryName == interest.NewsCategoryName)
.IsFavorite = true;
}
return(allNewsCats);
}
catch (Exception ex)
{
System.Diagnostics.Debug.WriteLine(ex);
return(new List <NewsCategory>());
}
}
async Task <List <NewsCategory> > GetSavedUserInterests()
{
List <NewsCategory> usersFavoriteNewsCategories = new List <NewsCategory>();
var userInterests = await GetUserInterestsFromCosmos();
// Now loop through all the user interests
// finding the match inside of the AllNewsCategories mark it as a fave
// then add that fave to the return list
var allNewsCategories = new AllNewsCategories();
foreach (var item in userInterests)
{
var newsCategory = allNewsCategories.FirstOrDefault(nc => nc.CategoryName == item.NewsCategoryName);
newsCategory.IsFavorite = true;
usersFavoriteNewsCategories.Add(newsCategory);
}
return(usersFavoriteNewsCategories);
}
async Task <List <NewsCategory> > GetSavedUserInterests()
{
List <NewsCategory> usersFavoriteNewsCategories = new List <NewsCategory>();
var userInterests = await GetUserInterestsFromCosmos();
if (userInterests == null)
{
// try signing in again - most likey token expired
await authService.Login();
isCosmosInitialized = false;
userInterests = await GetUserInterestsFromCosmos();
// just keep on going - it's a demo
if (userInterests == null)
{
userInterests = new List <UserInterest>();
}
}
// Now loop through all the user interests
// finding the match inside of the AllNewsCategories mark it as a fave
// then add that fave to the return list
var allNewsCategories = new AllNewsCategories();
foreach (var item in userInterests)
{
var newsCategory = allNewsCategories.FirstOrDefault(nc => nc.CategoryName == item.NewsCategoryName);
newsCategory.IsFavorite = true;
usersFavoriteNewsCategories.Add(newsCategory);
}
return(usersFavoriteNewsCategories);
}
