Added full documentation

Trady/Views/AcceptDeclineOfferPage.xaml.cs

@@ -12,12 +12,13 @@ namespace Trady.Views
         {
             InitializeComponent();
         }
-
+        // change Is Accepted field to true  for the specfifc offer
         async void acceptbtn_Clicked(System.Object sender, System.EventArgs e)
-        {
+        {   //connecting o the database
             using (SQLiteConnection conn = new SQLiteConnection(App.FilePath))
-            {
+            {   //get the offerId through binding context
                 int OfferID = int.Parse(offerId.Text);
+                //get the details of the offer by using the offerId obtained in the previous step
                 var currentOffer = conn.Table<Offer>().First(o => o.OfferId == OfferID);
                 conn.Update(new Offer {
                     OfferId = currentOffer.OfferId,
@@ -33,17 +34,18 @@ namespace Trady.Views
                     IsRecieved = currentOffer.IsRecieved
                 });
 
-                var check = conn.Table<Offer>().First(o => o.OfferId == OfferID);
-            }
+
+            }   //navigate to MyTrades Page
                 await Navigation.PushAsync(new MyTradesPage());
         }
-
+        // change ISDeclined field to true for the soecific offer
         async void declinebtn_Clicked(System.Object sender, System.EventArgs e)
         {
-
+            //connect to database
             using (SQLiteConnection conn = new SQLiteConnection(App.FilePath))
-            {
+            {   // get offer id through binding cintext
                 int OfferID = int.Parse(offerId.Text);
+                //get the details of the specific offer using th offerid Obtained in the previous step
                 var currentOffer = conn.Table<Offer>().First(o => o.OfferId == OfferID);
                 conn.Update(new Offer
                 {
@@ -60,8 +62,9 @@ namespace Trady.Views
                     IsRecieved = currentOffer.IsRecieved
                 });
 
-                var check = conn.Table<Offer>().First(o => o.OfferId == OfferID);
+
             }
+            //navigate to MyTrades Page
             await Navigation.PushAsync(new MyTradesPage());
         }
     }

Trady/Views/MakeOfferPage.xaml.cs

@@ -18,17 +18,15 @@ namespace Trady.Views
 
         async void PostOfferbtn_Clicked(System.Object sender, System.EventArgs e)
         {
-
-
-            //get current user id
+            // connecting to database
             using (SQLiteConnection conn = new SQLiteConnection(App.FilePath))
             {   //getting the trade ID and the user id who posted the trade
                 int TradeId = int.Parse(tradeId.Text);
                 int tradeUserId = int.Parse(userId.Text);
                 //Getting the active user by getting the user with currentUser flag set to true
                 var currentUser = conn.Table<User>().First(r => r.CurrentUser == true);
 
-                // creating a new offer with isSubmitted field to true wfor the user that is submitting the offer
+                // creating a new offer with isSubmitted field to true for the user that is submitting the offer
                 Offer offer1 = new Offer()
                 {
                     UserId = currentUser.UserId,

Trady/Views/MyTradesPage.xaml.cs

@@ -1,7 +1,6 @@
 using System;
 using System.Collections.Generic;
 using SQLite;
-
 using Xamarin.Forms;
 using Trady.Models;
 
@@ -13,17 +12,16 @@ namespace Trady.Views
         {
             InitializeComponent();
         }
-
+        // overriding onAppearing method
         protected override void OnAppearing()
         {
             base.OnAppearing();
 
-
             using (SQLiteConnection conn = new SQLiteConnection(App.FilePath))
             {
                 // Getting the active user by getting the user with currentUser flag set to true
                 var currentUser = conn.Table<User>().First(r => r.CurrentUser == true);
-                //get the currentUserOffers
+                //get the currentUserOffers by getting the offers with the current user id
                 var currentUserOffers = conn.Table<Offer>().Where(i => i.UserId == currentUser.UserId);
 
                 //get submitted offers and display them in submittedOffers collection view
@@ -36,18 +34,17 @@ namespace Trady.Views
             }
 
         }
-
+        // navigate to post trade page once button is pressed
         async void post_Clicked(System.Object sender, System.EventArgs e)
         {
             await Navigation.PushAsync(new PostTradePage());
         }
 
-
-
+        // navigate to another page when coolection view item is selected in the recieved offers to accept or decline the offer
         async void recievedOffers_SelectionChanged(System.Object sender, Xamarin.Forms.SelectionChangedEventArgs e)
         {
             await Navigation.PushAsync(new AcceptDeclineOfferPage
-            {
+            {   //setting the binding context to the offer detail
                 BindingContext = recievedOffersCollectionView.SelectedItem as Offer
             });
         }

Trady/Views/PostTradePage.xaml.cs

@@ -13,16 +13,15 @@ namespace Trady.Views
             InitializeComponent();
         }
 
-
-
        async void PostTradebtn_Clicked(System.Object sender, System.EventArgs e)
         {
 
-            //get current user id
+            //connect to data-base
             using (SQLiteConnection conn = new SQLiteConnection(App.FilePath))
             {
+                //get current user id
                 var currentUser  = conn.Table<User>().First(r => r.CurrentUser == true);
-
+                // create a new trade entry with user inputed info
                 Trade trade = new Trade()
                 {
                     UserId = currentUser.UserId,
@@ -33,11 +32,12 @@ namespace Trady.Views
                     Completed = false,
                     OffersPlaced = 0
                 };
-
+                // cretae new table or connect to it if exists
                 conn.CreateTable<Trade>();
+                //insert row to the table
                 int rowsAdded = conn.Insert(trade);
             }
-
+                // navigate to My Trades Page
                 await Navigation.PushAsync(new MyTradesPage());
         }
     }

Trady/Views/ProfilePage.xaml.cs

@@ -12,23 +12,25 @@ namespace Trady.Views
         {
             InitializeComponent();
         }
-
+        // overriding on Appear method
         protected override void OnAppearing()
         {
             base.OnAppearing();
+            // connect to database
             using (SQLiteConnection conn = new SQLiteConnection(App.FilePath))
-            {
+            {   // create table or connet if exists
                 conn.CreateTable<User>();
+                // get current user
                 var user = conn.Table<User>().FirstOrDefault(r => r.CurrentUser == true);
-
+                // setting the values on screen to match databse values
                 userName.Text = user.Name;
                 userImage.Source = user.Picture;
 
             }
 
         }
 
-
+        // Navigation bar routuing
         void tradesPagebtn_Clicked(System.Object sender, System.EventArgs e)
         {
 

Trady/Views/TradesPage.xaml.cs

@@ -14,24 +14,25 @@ namespace Trady.Views
         public TradesPage()
         {
             InitializeComponent(); 
-
         }
-
+        // overriding onAppearing method
         protected override void OnAppearing()
         {
             base.OnAppearing();
+            // connecting to the data base
             using (SQLiteConnection conn = new SQLiteConnection(App.FilePath))
-            {
+            {   // create table or coonect to if exists
                 conn.CreateTable<Trade>();
+                // getting all trades as a list
                 var trades = conn.Table<Trade>().ToList();
+                //setting the carousel view source to the list
                 tradesCarouselView.ItemsSource = trades;
             }
-
         }
 
         async void makeOfferbtn_Clicked(System.Object sender, System.EventArgs e)
         {
-
+              //navigate to makeofferpage while setting the binding context to the selected trade info
             await Navigation.PushAsync(new MakeOfferPage {
 
                 BindingContext = tradesCarouselView.CurrentItem as Trade

Trady/Views/facebookLoginPage.xaml.cs

@@ -15,32 +15,32 @@ namespace Trady.Views
 
         {
             InitializeComponent();
-
+            // calling Fb Login API
             WebView.Source = "https://www.facebook.com/v9.0/dialog/oauth?client_id=1272538809769102&redirect_uri=https://www.facebook.com/connect/login_success.html&response_type=token";
+            // calling event handeler
             WebView.Navigated += WebView_Navigated;
 
         }
         private void WebView_Navigated(object sender, WebNavigatedEventArgs e)
-        {
+        {   // get recieved url
             var AccessURL = e.Url;
             if (AccessURL.Contains("access_token"))
-            {
+            {   // replace text before access token with an empty string(to get the access token alone)
                 AccessURL = AccessURL.Replace("https://www.facebook.com/connect/login_success.html#access_token=", string.Empty);
                 var accessToken = AccessURL.Split('&')[0];
                 HttpClient client = new HttpClient();
+                // responding with the access url and requestd user info
                 var response = client.GetStringAsync("https://graph.facebook.com/me?fields=name,picture,email,id&access_token=" + accessToken).Result;
 
-
+                // Deseralizing api response in Jason Format
                 var Data = JsonConvert.DeserializeObject<FacebookProfile>(response);
 
 
                 //connecto to database to check if user is already registered
                 using (SQLiteConnection conn = new SQLiteConnection(App.FilePath))
                 {
 
-
-                    var Users = conn.Table<User>().ToList();
-                    //set user with Current user true to false
+                    //set user with Current user true to false( cuurent user is used to dertmine the user currently accessing the application)
                     var setActiveToFalse = conn.Table<User>().FirstOrDefault(r => r.CurrentUser == true);
                     if (setActiveToFalse != null)
                     {
@@ -54,10 +54,7 @@ namespace Trady.Views
 
                         });
                     }
-
-
-                    var check = conn.Table<User>().FirstOrDefault(r => r.CurrentUser == false);
-
+                    // creating a new user if first time accessing aplication by checking if fb id is already stored in database
                     var loggedInUser = conn.Table<User>().FirstOrDefault(c => c.FacebookId == Data.Id);
 
                     if(loggedInUser == null)
@@ -74,12 +71,12 @@ namespace Trady.Views
 
                         };
 
-
+                        // add user if not registered
                         conn.CreateTable<User>();
                         int rowsAdded = conn.Insert(user);
 
                     }
-                    //set current user to true to the logged in user
+                    //set current user to true for the logged in user
                     var activeUser = conn.Table<User>().FirstOrDefault(c => c.FacebookId == Data.Id);
                     //var activeUser = conn.Table<User>().FirstOrDefault(c => c.UserId == 0);
                     conn.Update(new User {
@@ -90,14 +87,9 @@ namespace Trady.Views
                        Picture = activeUser.Picture,
 
                     });
-                    //check if current user has true currentUser flag
-                    var beforeCurrentActiveUsers = conn.Table<User>().First(r => r.CurrentUser == true);
 
                 }
-
-
-
-
+              //Navigate to trades Page
                 Navigation.PushAsync(new TradesPage());
 
             }