implements an upload

BookAStar/BookAStar/Helpers/UserHelpers.cs

@@ -1,8 +1,12 @@
 using System;
 using System.Collections.Generic;
 using System.Diagnostics;
+using System.Globalization;
+using System.IO;
 using System.Linq;
+using System.Net.Http;
 using System.Text;
+using System.Text.RegularExpressions;
 using System.Threading.Tasks;
 using Xamarin.Forms;
 
@@ -12,17 +16,49 @@ namespace BookAStar.Helpers
     {
         public static ImageSource Avatar(string avatarPath)
         {
-            /*foreach (var r in App.Current.Resources)
-            {
-                Debug.WriteLine($"#R# {r.Key} : {r.GetType().Name}");
-            }*/
             var result = avatarPath == null ?
-                ImageSource.FromResource(/* "BookAStar.icon_user.png" */ "BookAStar.Images.icon_user.png") :
+                ImageSource.FromResource( "BookAStar.Images.icon_user.png") :
                 avatarPath.StartsWith("res://") ?
                  ImageSource.FromResource(avatarPath.Substring(6)) :
                  ImageSource.FromUri(new Uri(avatarPath));
             var test = ImageSource.FromResource("none.resource.png");
             return result;
         }
+
+        public static HttpClient CreateClient()
+        {
+            var client = new HttpClient();
+            client.DefaultRequestHeaders.Authorization =
+                new System.Net.Http.Headers.AuthenticationHeaderValue(
+                    "Bearer", MainSettings.CurrentUser.YavscTokens.AccessToken);
+            return client;
+        }
+
+        /// <summary>
+        /// Uploads the given stream to
+        /// /api/fs, in order to be saved under the given file name
+        /// </summary>
+        /// <param name="inputStream"></param>
+        /// <param name="fileName"></param>
+        /// <returns></returns>
+        public static async Task<bool> Upload(Stream inputStream, string fileName)
+        {
+            using (var client = CreateClient())
+            {
+                using (var content =
+                    new MultipartFormDataContent("Upload----" + DateTime.Now.ToString(CultureInfo.InvariantCulture)))
+                {
+                    content.Add(new StreamContent(inputStream), "Files", fileName);
+
+                    using (
+                       var message =
+                           await client.PostAsync(Constants.FsUrl, content))
+                    {
+                        return (message.IsSuccessStatusCode);
+                    }
+                }
+            }
+        }
+
     }
 }