Add proper Maven Central support

Author: Redth

MavenNet.Tests/Test.cs

@@ -7,10 +7,7 @@ namespace MavenNet.Tests
 {
 	public class Test
 	{
-		const string GPS_LOCAL_REPO = "/Users/redth/Library/Developer/Xamarin/android-sdk-macosx/extras/google/m2repository/";
 		const string ANDROID_THINGS_URL_REPO = "https://google.bintray.com/androidthings";
-		const string GOOGLE_MAVEN_REPO = "https://dl.google.com/dl/android/maven2/";
-		const string CENTRAL_MAVEN_REPO = "http://repo1.maven.org/maven2/";
 
 		[Fact]
 		public async Task Test_Refresh_URL()
@@ -44,55 +41,18 @@ public async Task Test_GroupIds_Project_URL()
 		}
 
 
-		//[Fact]
+		[Fact]
         public async Task Test_GroupIds_Project_URL_Maven()
         {
-            var repo = MavenRepository.FromUrl(CENTRAL_MAVEN_REPO);
+            var repo = MavenRepository.FromMavenCentral();
             await repo.Refresh("com.facebook.android");
 
 			var project = await repo.GetProjectAsync("com.facebook.android", "facebook-android-sdk", "4.33.0");
 
             Assert.True(project != null);
+            Assert.NotEmpty(project.Dependencies);
         }
 
-		//[Trait("Category", "LOCAL_ONLY")]
-		//[Fact]
-		//public async Task Test_Refresh_FILE()
-		//{
-		//	var repo = MavenRepository.FromDirectory(GPS_LOCAL_REPO);
-		//	await repo.Refresh();
-
-		//	Assert.True(repo.Groups.Any());
-		//}
-
-		//[Trait("Category", "LOCAL_ONLY")]
-		//[Fact]
-		//public async Task Test_Project_FILE()
-		//{
-		//	var repo = MavenRepository.FromDirectory(GPS_LOCAL_REPO);
-		//	await repo.Refresh();
-
-		//	var project = await repo.GetProjectAsync("com.google.android.gms", "play-services-basement", "10.2.0");
-
-		//	Assert.True(project != null);
-
-		//	Assert.True(project.Dependencies?.Any());
-		//}
-
-		//[Trait("Category", "LOCAL_ONLY")]
-		//[Fact]
-		//public async Task Test_GroupIds_Project_FILE()
-		//{
-		//	var repo = MavenRepository.FromDirectory(GPS_LOCAL_REPO);
-		//	await repo.Refresh("com.google.android.gms");
-
-		//	var project = await repo.GetProjectAsync("com.google.android.gms", "play-services-basement", "10.2.0");
-
-		//	Assert.True(project != null);
-
-		//	Assert.True(project.Dependencies?.Any());
-		//}
-
 		[Fact]
 		public async Task Test_Refresh_GOOGLE()
 		{

MavenNet/MavenCentralRepository.cs

@@ -0,0 +1,71 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Net.Http;
+using System.Text;
+using System.Threading.Tasks;
+using MavenNet.Models;
+using Newtonsoft.Json.Linq;
+
+namespace MavenNet
+{
+    public class MavenCentralRepository : MavenRepository
+    {
+        protected override char PathSeparator
+            => '/';
+
+        protected override string CombinePaths(params string[] parts)
+        {
+            return string.Join(new string(PathSeparator, 1), parts);
+        }
+
+        static readonly HttpClient http = new HttpClient();
+
+        protected override async Task<IEnumerable<Artifact>> GetArtifactsAsync(string groupId)
+        {
+            var artifacts = new List<Artifact>();
+
+            var url = $"http://search.maven.org/solrsearch/select?q=g:%22{groupId}%22&rows=100&wt=json";
+
+            var data = await http.GetStringAsync(url);
+
+            var json = JObject.Parse(data);
+
+            var docs = json["response"]["docs"] as JArray;
+
+            if (docs != null)
+            {
+                foreach (var doc in docs)
+                {
+                    var gid = doc.Value<string>("g");
+                    var aid = doc.Value<string>("a");
+
+                    try
+                    {
+                        using (var s = await OpenMavenMetadataFile(gid, aid).ConfigureAwait(false))
+                        {
+                            var metadata = MavenMetadataParser.Parse(s);
+
+                            artifacts.Add(new Artifact(aid, gid, metadata.AllVersions.ToArray()));
+                        }
+                    }
+                    catch { }
+                }
+            }
+
+            return artifacts;
+        }
+
+        protected override Task<IEnumerable<string>> GetGroupIdsAsync()
+        {
+            return Task.FromResult<IEnumerable<string>>(new List<string>());
+        }
+
+        protected override Task<Stream> OpenFileAsync(string path)
+        {
+            var url = $"https://repo1.maven.org/maven2/{path}";
+
+            return http.GetStreamAsync(url);
+        }
+    }
+}

MavenNet/MavenNet.csproj

@@ -21,6 +21,7 @@
     <Compile Remove="Properties\AssemblyInfo.cs" />
   </ItemGroup>
   <ItemGroup>
+    <PackageReference Include="Newtonsoft.Json" Version="12.0.1" />
     <PackageReference Include="NuGet.Versioning" Version="4.7.0" />
   </ItemGroup>
 </Project>

MavenNet/MavenRepository.cs

@@ -14,6 +14,11 @@ public static GoogleMavenRepository FromGoogle()
 			return new GoogleMavenRepository();
 		}
 
+        public static MavenCentralRepository FromMavenCentral()
+        {
+            return new MavenCentralRepository();
+        }
+
 		public static FileBasedMavenRepository FromUrl(string url)
 		{
 			return new UrlMavenRepository(url);