From 5ccb2120bf6d30027d09b459a21759420dfaf5e6 Mon Sep 17 00:00:00 2001
From: Ogoun <ogoun.er@yandex.ru>
Date: Fri, 22 Nov 2019 01:31:03 +0300
Subject: [PATCH] UrlBuilder

---
 TestApp/Program.cs                   |  38 ++++++++--
 TestApp/TestApp.csproj               |   4 +
 ZeroLevel/Services/Web/UrlBuilder.cs | 106 +++++++++++++++++++++++++++
 ZeroLevel/Services/Web/UrlUtility.cs |   4 +-
 4 files changed, 146 insertions(+), 6 deletions(-)
 create mode 100644 ZeroLevel/Services/Web/UrlBuilder.cs

diff --git a/TestApp/Program.cs b/TestApp/Program.cs
index 6cb9b45..54bab42 100644
--- a/TestApp/Program.cs
+++ b/TestApp/Program.cs
@@ -1,13 +1,41 @@
-using System;
-using ZeroLevel.Services;
+using Newtonsoft.Json;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Reflection;
+using System.Text;
+using ZeroLevel.Services.Web;
 
 namespace TestApp
 {
+    public class TestQuery
+    {
+        public string Name { get; set; }
+        public int Age { get; set; }
+        public string[] Roles { get; set; }
+    }
+
     internal static class Program
     {
+        private static string Serialize(object instance)
+        {
+            return JsonConvert.SerializeObject(instance);
+        }
+
         private static void Main(string[] args)
         {
-            var fiber = new Fiber();
+            var t = new TestQuery
+            {
+                Age = 133,
+                Roles = new[] { "ad\"\"\"min", "user", "operator" },
+                Name = "su"
+            };
+            var builder = new UrlBuilder(Serialize);
+            var url = builder.BuildRequestUrlFromDTO("http://google.com", "/api/v0/getuserinfo", t);
+            Console.WriteLine(url);
+            Console.ReadKey();
+
+            /*var fiber = new Fiber();
             fiber
                 .Add((s) => { Console.WriteLine("1"); s.Add<int>("1", 1); return s; })
                 .Add((s) => { Console.WriteLine("2"); s.Add<int>("2", 2); return s; })
@@ -21,9 +49,9 @@ namespace TestApp
             foreach (var key in result.Keys<int>())
             {
                 Console.WriteLine($"{key}: {result.Get<int>(key)}");
-            }
+            }*/
+
 
-            Console.ReadKey();
 
 
             /*Configuration.Save(Configuration.ReadFromApplicationConfig());
diff --git a/TestApp/TestApp.csproj b/TestApp/TestApp.csproj
index c13cbb7..9f8c521 100644
--- a/TestApp/TestApp.csproj
+++ b/TestApp/TestApp.csproj
@@ -5,6 +5,10 @@
     <TargetFramework>netcoreapp2.2</TargetFramework>
   </PropertyGroup>
 
+  <ItemGroup>
+    <PackageReference Include="Newtonsoft.Json" Version="12.0.3" />
+  </ItemGroup>
+
   <ItemGroup>
     <ProjectReference Include="..\ZeroLevel\ZeroLevel.csproj" />
   </ItemGroup>
diff --git a/ZeroLevel/Services/Web/UrlBuilder.cs b/ZeroLevel/Services/Web/UrlBuilder.cs
new file mode 100644
index 0000000..f1cff1a
--- /dev/null
+++ b/ZeroLevel/Services/Web/UrlBuilder.cs
@@ -0,0 +1,106 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Reflection;
+using System.Text;
+using System.Web;
+
+namespace ZeroLevel.Services.Web
+{
+    public class UrlBuilder
+    {
+        private readonly Func<object, string> _serializer;
+
+        public UrlBuilder(Func<object, string> serializer)
+        {
+            _serializer = serializer;
+        }
+
+        public Uri BuildRequestUrlFromDTO<T>(string baseUri, string resource, T instance)
+        {
+            if (null == instance)
+            {
+                return BuildRequestUrl(baseUri, resource, null);
+            }
+            var members = typeof(T).GetMembers(
+                BindingFlags.Public |
+                BindingFlags.FlattenHierarchy |
+                BindingFlags.GetField |
+                BindingFlags.GetProperty |
+                BindingFlags.Instance);
+            var parameters = new Dictionary<string, object>();
+            foreach (var member in members)
+            {
+                switch (member.MemberType)
+                {
+                    case MemberTypes.Property:
+                        parameters.Add(member.Name.ToLowerInvariant(), (member as PropertyInfo).GetValue(instance));
+                        break;
+                    case MemberTypes.Field:
+                        parameters.Add(member.Name.ToLowerInvariant(), (member as FieldInfo).GetValue(instance));
+                        break;
+                    default:
+                        continue;
+                }
+            }
+            return BuildRequestUrl(baseUri, resource, parameters);
+        }
+
+        public Uri BuildRequestUrl(string baseUri, string resource, IDictionary<string, object> parameters)
+        {
+            if (null == resource) throw new ArgumentNullException("resource");
+            var stringBuilder = new StringBuilder(baseUri);
+            if (baseUri[baseUri.Length - 1] != '/')
+                stringBuilder.Append('/');
+            if (resource[0] != '/')
+            {
+                stringBuilder.Append(resource);
+            }
+            else
+            {
+                stringBuilder.Append(resource.Substring(1));
+            }
+            if (parameters != null && parameters.Count > 0)
+            {
+                stringBuilder.Append("?");
+                foreach (var pair in parameters)
+                {
+                    if (pair.Value == null)
+                    {
+                        stringBuilder.Append(pair.Value);
+                    }
+                    else
+                    {
+                        var vtype = pair.Value.GetType();
+                        if (vtype.IsArray)
+                        {
+                            if (vtype.GetElementType() == typeof(string))
+                            {
+                                var arr = (string[])pair.Value;
+                                stringBuilder.Append(string.Join("&", arr.Select(i => $"{HttpUtility.UrlEncode(pair.Key)}[]={HttpUtility.UrlEncode(i)}")));
+                            }
+                            else
+                            {
+                                var arr = (object[])pair.Value;
+                                stringBuilder.Append(string.Join("&", arr.Select(i => $"{HttpUtility.UrlEncode(pair.Key)}[]={HttpUtility.UrlEncode(_serializer(i))}")));
+                            }
+                        }
+                        else
+                        {
+                            if (vtype == typeof(string))
+                            {
+                                stringBuilder.Append($"{HttpUtility.UrlEncode(pair.Key)}={HttpUtility.UrlEncode((string)pair.Value)}");
+                            }
+                            else
+                            {
+                                stringBuilder.Append($"{HttpUtility.UrlEncode(pair.Key)}={HttpUtility.UrlEncode(_serializer(pair.Value))}");
+                            }
+                        }
+                    }
+                    stringBuilder.Append("&");
+                }
+            }
+            return new Uri(stringBuilder.ToString().TrimEnd('&'));
+        }
+    }
+}
diff --git a/ZeroLevel/Services/Web/UrlUtility.cs b/ZeroLevel/Services/Web/UrlUtility.cs
index b92d89f..87c8fff 100644
--- a/ZeroLevel/Services/Web/UrlUtility.cs
+++ b/ZeroLevel/Services/Web/UrlUtility.cs
@@ -1,5 +1,7 @@
 using System;
 using System.Collections.Generic;
+using System.Linq;
+using System.Reflection;
 using System.Text;
 using System.Text.RegularExpressions;
 
@@ -522,6 +524,6 @@ namespace ZeroLevel.Services.Web
                 i++;
             }
             return result;
-        }
+        }        
     }
 }
\ No newline at end of file