Core update. Base core features are done (main app doesn't compile)

Related Work Items: #416, #422, #423, #424

FoxTube.Core/Models/Collections/InboxCollection.cs

@@ -0,0 +1,45 @@
+using Newtonsoft.Json;
+using System.Threading.Tasks;
+using System.Net.Http;
+using Windows.UI.Xaml.Data;
+using FoxTube.Services;
+using FoxTube.Utils;
+
+namespace FoxTube.Models.Collections
+{
+	public class InboxCollection : ViewCollection<InboxItem>
+	{
+		private int _pageNumber = 0;
+		private HttpClient _httpClient = new HttpClient();
+
+		public override async Task<LoadMoreItemsResult> LoadItems()
+		{
+			// TODO: Add backend
+			HttpResponseMessage response = await _httpClient.GetAsync($"https://xfox111.net/API/FoxTube/Inbox?" +
+				$"lang={Storage.GetValue<string>(Storage.Settings.UILanguage)}&" +
+				$"currentVersion={Metrics.CurrentVersion}&" +
+				$"itemsCount={ItemsPerRequest}&" +
+				$"iteration={_pageNumber}");
+
+			if (!response.IsSuccessStatusCode || response.StatusCode == System.Net.HttpStatusCode.NoContent)
+			{
+				HasMoreItems = false;
+				return new LoadMoreItemsResult
+				{
+					Count = 0
+				};
+			}
+
+			InboxItem[] newItems = JsonConvert.DeserializeObject<InboxItem[]>(await response.Content.ReadAsStringAsync());
+			foreach (InboxItem item in newItems)
+				Items.Add(item);
+
+			_pageNumber++;
+
+			return new LoadMoreItemsResult
+			{
+				Count = (uint)newItems.Length
+			};
+		}
+	}
+}

FoxTube.Core/Models/Collections/ViewCollection.cs

@@ -0,0 +1,19 @@
+using System.Collections.ObjectModel;
+using System.Runtime.InteropServices.WindowsRuntime;
+using System.Threading.Tasks;
+using Windows.Foundation;
+using Windows.UI.Xaml.Data;
+
+namespace FoxTube.Models.Collections
+{
+	public abstract class ViewCollection<T> : ObservableCollection<T>, ISupportIncrementalLoading
+	{
+		public int ItemsPerRequest { get; set; }
+		public bool HasMoreItems { get; protected set; } = true;
+
+		public IAsyncOperation<LoadMoreItemsResult> LoadMoreItemsAsync(uint count) =>
+			AsyncInfo.Run((c) => LoadItems());
+
+		public abstract Task<LoadMoreItemsResult> LoadItems();
+	}
+}

FoxTube.Core/Models/DownloadItem.cs

@@ -1,4 +1,5 @@
-using System;
+using FoxTube.Services;
+using System;
 using System.Threading;
 using System.Threading.Tasks;
 using Windows.Storage;
@@ -20,7 +21,7 @@ namespace FoxTube.Models
 		public async Task CommenceDownload(IStreamInfo stream, IStorageFile destination)
 		{
 			Path = destination.Path;
-			YoutubeClient client = new YoutubeClient(UserManagement.Service.HttpClient);
+			YoutubeClient client = new YoutubeClient(UserService.Service.HttpClient);
 
 			State = DownloadState.Downloading;
 			Task task = client.Videos.Streams.DownloadAsync(stream, Path, DownloadPercentage, CTS.Token);

FoxTube.Core/Models/User.cs

@@ -13,6 +13,7 @@ using System.Threading.Tasks;
 using Windows.Storage;
 using YouTube;
 using YoutubeExplode;
+using FoxTube.Services;
 
 namespace FoxTube.Models
 {
@@ -36,10 +37,10 @@ namespace FoxTube.Models
 				catch (Exception e)
 				{
 					Metrics.SendReport(new Exception("Failed to unsubscribe", e));
-					return true; 
+					return true;
 				}
 
-				UserManagement.SubscriptionsChangedInvoker(this, subscription);
+				UserService.SubscriptionsChangedInvoker(this, subscription);
 				Subscriptions.Remove(subscription);
 
 				SaveSubscriptions();
@@ -77,7 +78,7 @@ namespace FoxTube.Models
 				};
 				Subscriptions.Add(subscription);
 
-				UserManagement.SubscriptionsChangedInvoker(this, subscription);
+				UserService.SubscriptionsChangedInvoker(this, subscription);
 
 				SaveSubscriptions();
 				return true;
@@ -86,7 +87,7 @@ namespace FoxTube.Models
 
 		private void SaveSubscriptions()
 		{
-			Dictionary<string, string> subs = Subscriptions.Select(i => 
+			Dictionary<string, string> subs = Subscriptions.Select(i =>
 				new KeyValuePair<string, string>(i.ChannelId, i.Avatar.Default__?.Url))
 				as Dictionary<string, string>;
 

FoxTube.Core/Models/VideoItem.cs

@@ -1,4 +1,5 @@
-using Google.Apis.YouTube.v3.Data;
+using FoxTube.Services;
+using Google.Apis.YouTube.v3.Data;
 using System;
 using YoutubeExplode;
 
@@ -36,7 +37,7 @@ namespace FoxTube.Models
 
 		private async void LoadInfo()
 		{
-			YoutubeClient client = new YoutubeClient(UserManagement.Service.HttpClient);
+			YoutubeClient client = new YoutubeClient(UserService.Service.HttpClient);
 
 			AdditionalMeta = await client.Videos.GetAsync(Meta.Id);
 			ChannelMeta = await client.Channels.GetByVideoAsync(Meta.Id);