Added command !wikirandom with test

SonequaBot.Discord/SonequaDiscord.cs

@@ -102,6 +102,20 @@ private async Task CommandHandler(DiscordClient client, MessageCreateEventArgs e
                             await e.Channel.SendMessageAsync("", false, embed);
                         }
 
+                        if (command is IResponseImageCard messageCard)
+                        {
+                            var cardData = messageCard.GetImageCardEvent(source);
+
+                            var embed = new DiscordEmbedBuilder
+                            {
+                                Title = cardData.Title,
+                                Description = cardData.Description,
+                                ImageUrl = cardData.ImageUrl,
+                                Url = cardData.Url
+                            };
+                            await e.Channel.SendMessageAsync("", false, embed);
+                        }
+
                         return;
                     }
                 }

SonequaBot.Shared/Commands/CommandWikiRandom.cs

@@ -0,0 +1,72 @@
+using Newtonsoft.Json.Linq;
+using SonequaBot.Shared.Commands.DTO;
+using SonequaBot.Shared.Commands.Interfaces.Responses;
+using System;
+using System.IO;
+using System.Net.Http;
+using System.Threading.Tasks;
+
+namespace SonequaBot.Shared.Commands
+{
+    public class CommandWikiRandom: CommandBase, IResponseImageCard
+    {
+        private const string ENDPOINT = "https://it.wikipedia.org/api/rest_v1/page/random/summary";
+
+        protected override string ActivationCommand => "!wikirandom";
+
+        public ImageCardData GetImageCardEvent(CommandSource source)
+        {
+            ImageCardData result = new ImageCardData()
+            {
+                Title = "Rick Astley",
+                Description = "Richard Paul Astley (Newton-le-Willows, 6 febbraio 1966) è un cantautore, musicista e conduttore radiofonico britannico.",
+                ImageUrl = "https://upload.wikimedia.org/wikipedia/commons/thumb/6/6d/Rick_Astley_-_Pepsifest_2009.jpg/200px-Rick_Astley_-_Pepsifest_2009.jpg"
+            };
+
+            try
+            {
+                string json = this.GetPage().Result;
+
+                if (!string.IsNullOrEmpty(json))
+                {
+                    JObject wikiPage = JObject.Parse(json);
+                    result.Title = wikiPage["displaytitle"]?.ToString() ?? string.Empty;
+                    result.Description = wikiPage["extract"]?.ToString() ?? string.Empty;
+                    result.ImageUrl = wikiPage["thumbnail"]?["source"]?.ToString() ?? string.Empty;
+                    result.Url = wikiPage["content_urls"]?["desktop"]?["page"]?.ToString() ?? string.Empty;
+                }
+            }
+            catch (Exception ex)
+            {
+                // external CommandHandler is catching exceptions
+                throw;
+            }
+
+            return result;
+        }
+
+        private async Task<string> GetPage()
+        {
+            string json = string.Empty;
+
+            try
+            {
+                using (var client = new HttpClient())
+                {
+                    HttpResponseMessage response = await client.GetAsync(ENDPOINT);
+                    HttpContent responseContent = response.Content;
+                    using (var reader = new StreamReader(await responseContent.ReadAsStreamAsync()))
+                    {
+                        json = await reader.ReadToEndAsync();
+                    }
+                }
+            }
+            catch (Exception)
+            {
+                throw;
+            }
+
+            return json;
+        }
+    }
+}

SonequaBot.Shared/Commands/DTO/ImageCardData.cs

@@ -0,0 +1,23 @@
+using System;
+
+namespace SonequaBot.Shared.Commands.DTO
+{
+    public class ImageCardData
+    {
+        public ImageCardData()
+        {
+            this.Title = string.Empty;
+            this.Description = string.Empty;
+            this.ImageUrl = string.Empty;
+            this.Url = string.Empty;
+        }
+
+        public string Title { get; set; }
+
+        public string Description { get; set; }
+
+        public string ImageUrl { get; set; }
+
+        public string Url { get; set; }
+    }
+}

SonequaBot.Shared/Commands/Interfaces/Responses/IResponseImageCard.cs

@@ -0,0 +1,9 @@
+using SonequaBot.Shared.Commands.DTO;
+
+namespace SonequaBot.Shared.Commands.Interfaces.Responses
+{
+    public interface IResponseImageCard
+    {
+        ImageCardData GetImageCardEvent(CommandSource source);
+    }
+}

SonequaBot.Tests/SonequaBot.Tests.csproj

@@ -17,6 +17,7 @@
 
     <ItemGroup>
         <ProjectReference Include="..\SonequaBot.Sentiment\SonequaBot.Sentiment.csproj" />
+        <ProjectReference Include="..\SonequaBot.Shared\SonequaBot.Shared.csproj" />
     </ItemGroup>
 
 </Project>

SonequaBot.Tests/WikiRandomCommand/WikiRandomCommandTest.cs

@@ -0,0 +1,35 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using SonequaBot.Shared.Commands;
+using Xunit;
+
+namespace SonequaBot.Sentiment.Tests.WikiRandomCommand
+{
+    public class WikiRandomCommandTest
+    {
+        [Fact]
+        public void Command_Should_Run()
+        {
+            var source = new CommandSource
+            {
+                Channel = "Test channel",
+                Message = "!wikirandom",
+                User = "Defkon1"
+            };
+
+            var commandProvider = new CommandWikiRandom();
+            Assert.NotNull(commandProvider);
+
+            var cardData = commandProvider.GetImageCardEvent(source);
+            Assert.NotNull(cardData);
+
+            Assert.NotEqual(string.Empty, cardData.Title);
+            Assert.NotEqual(string.Empty, cardData.Description);
+            //// Assert.NotEqual(string.Empty, cardData.ImageUrl); // image can be empty if no thumbnail is provided from Wikipedia
+            Assert.NotEqual(string.Empty, cardData.Url);
+        }
+    }
+}