iseebi/Program.cs

## howtouse.txt
> KataomoiList.exe [Twitter ID] > results.html

## packages.config
<?xml version="1.0" encoding="utf-8"?>
<packages>
  <package id="AsyncOAuth" version="0.8.4" targetFramework="net45" />
  <package id="Microsoft.Bcl" version="1.0.19" targetFramework="net45" />
  <package id="Microsoft.Bcl.Async" version="1.0.165" targetFramework="net45" />
  <package id="Microsoft.Bcl.Build" version="1.0.13" targetFramework="net45" />
  <package id="Newtonsoft.Json" version="6.0.1" targetFramework="net45" />
</packages>

## Program.cs
using System;
using AsyncOAuth;
using System.Security.Cryptography;
using Newtonsoft.Json.Linq;
using System.Linq;
using System.Collections.Generic;
using System.Threading.Tasks;

namespace KataomoiList
{
    class MainClass
    {
        private static string ConsumerKey = "<<CONSUMER KEY>>";
        private static string ConsumerSecret = "<<CONSUMER SECRET>>";
        private static AccessToken AccessToken = new AccessToken("<<ACCESS TOKEN>>", "<<ACCESS TOKEN SECRET>>");

        public static void Main(string[] args)
        {
            OAuthUtility.ComputeHash = (key, buffer) =>
            {
                using (var hmac = new HMACSHA1(key))
                {
                    return hmac.ComputeHash(buffer);
                }
            };

            var t = DoProcess(AccessToken, args[0]);
            t.Wait();

            if (System.Diagnostics.Debugger.IsAttached)
            {
                Console.Read();
            }
        }

        static async Task DoProcess(AccessToken accessToken, string screenName)
        {
            var client = OAuthUtility.CreateOAuthClient(ConsumerKey, ConsumerSecret, accessToken);
            var followings = JObject.Parse(await client.GetStringAsync("https://api.twitter.com/1.1/friends/ids.json?cursor=-1&count=5000&screen_name=" + screenName))["ids"].Values<uint>();
            var follwers = JObject.Parse(await client.GetStringAsync("https://api.twitter.com/1.1/followers/ids.json?cursor=-1&count=5000&screen_name=" + screenName))["ids"].Values<uint>();
            var excepts = followings.Except(follwers);

            var results = await excepts.Chunk(100).Select(async ids =>
                    JArray.Parse(await client.GetStringAsync("https://api.twitter.com/1.1/users/lookup.json?user_id="
                    + string.Join(",", ids.Select(i => i.ToString()))))
                .Select(j => new
                {
                    ScreenName = j["screen_name"].Value<string>(),
                    ProfileImage = j["profile_image_url"].Value<string>()
                })
            )
            .WhenAll();

            Console.WriteLine("<html><body><ul>");
            foreach (var item in results.SelectMany(i => i).OrderBy(i => i.ScreenName))
            {
                Console.WriteLine("<li><a href=\"https://twitter.com/{1}\"><img src=\"{0}\" />{1}</a></li>", item.ProfileImage, item.ScreenName);
            }
            Console.WriteLine("</ul></body></html>");

            Console.Error.WriteLine("Output {0} items", results.SelectMany(i => i).Count());
        }
    }

    // http://devlights.hatenablog.com/entry/20121130/p2
    public static class LinqSamples59_Extensions
    {
        /// <summary>
        /// シーケンスを指定されたサイズのチャンクに分割します.
        /// </summary>
        public static IEnumerable<IEnumerable<T>> Chunk<T>(this IEnumerable<T> self, int chunkSize)
        {
            if (chunkSize <= 0)
            {
                throw new ArgumentException("Chunk size must be greater than 0.", "chunkSize");
            }

            while (self.Any())
            {
                yield return self.Take(chunkSize);
                self = self.Skip(chunkSize);
            }
        }
    }
    // http://neue.cc/2013/12/04_435.html
    public static class TaskEnumerableExtensions
    {
        public static Task WhenAll(this IEnumerable<Task> tasks)
        {
            return Task.WhenAll(tasks);
        }

        public static Task<T[]> WhenAll<T>(this IEnumerable<Task<T>> tasks)
        {
            return Task.WhenAll(tasks);
        }
    }
}
	<?xml version="1.0" encoding="utf-8"?>
	<packages>
	<package id="AsyncOAuth" version="0.8.4" targetFramework="net45" />
	<package id="Microsoft.Bcl" version="1.0.19" targetFramework="net45" />
	<package id="Microsoft.Bcl.Async" version="1.0.165" targetFramework="net45" />
	<package id="Microsoft.Bcl.Build" version="1.0.13" targetFramework="net45" />
	<package id="Newtonsoft.Json" version="6.0.1" targetFramework="net45" />
	</packages>
	using System;
	using AsyncOAuth;
	using System.Security.Cryptography;
	using Newtonsoft.Json.Linq;
	using System.Linq;
	using System.Collections.Generic;
	using System.Threading.Tasks;

	namespace KataomoiList
	{
	class MainClass
	{
	private static string ConsumerKey = "<<CONSUMER KEY>>";
	private static string ConsumerSecret = "<<CONSUMER SECRET>>";
	private static AccessToken AccessToken = new AccessToken("<<ACCESS TOKEN>>", "<<ACCESS TOKEN SECRET>>");

	public static void Main(string[] args)
	{
	OAuthUtility.ComputeHash = (key, buffer) =>
	{
	using (var hmac = new HMACSHA1(key))
	{
	return hmac.ComputeHash(buffer);
	}
	};

	var t = DoProcess(AccessToken, args[0]);
	t.Wait();

	if (System.Diagnostics.Debugger.IsAttached)
	{
	Console.Read();
	}
	}

	static async Task DoProcess(AccessToken accessToken, string screenName)
	{
	var client = OAuthUtility.CreateOAuthClient(ConsumerKey, ConsumerSecret, accessToken);
	var followings = JObject.Parse(await client.GetStringAsync("https://api.twitter.com/1.1/friends/ids.json?cursor=-1&count=5000&screen_name=" + screenName))["ids"].Values<uint>();
	var follwers = JObject.Parse(await client.GetStringAsync("https://api.twitter.com/1.1/followers/ids.json?cursor=-1&count=5000&screen_name=" + screenName))["ids"].Values<uint>();
	var excepts = followings.Except(follwers);

	var results = await excepts.Chunk(100).Select(async ids =>
	JArray.Parse(await client.GetStringAsync("https://api.twitter.com/1.1/users/lookup.json?user_id="
	+ string.Join(",", ids.Select(i => i.ToString()))))
	.Select(j => new
	{
	ScreenName = j["screen_name"].Value<string>(),
	ProfileImage = j["profile_image_url"].Value<string>()
	})
	)
	.WhenAll();

	Console.WriteLine("<html><body><ul>");
	foreach (var item in results.SelectMany(i => i).OrderBy(i => i.ScreenName))
	{
	Console.WriteLine("<li><a href=\"https://twitter.com/{1}\"><img src=\"{0}\" />{1}</a></li>", item.ProfileImage, item.ScreenName);
	}
	Console.WriteLine("</ul></body></html>");

	Console.Error.WriteLine("Output {0} items", results.SelectMany(i => i).Count());
	}
	}

	// http://devlights.hatenablog.com/entry/20121130/p2
	public static class LinqSamples59_Extensions
	{
	/// <summary>
	/// シーケンスを指定されたサイズのチャンクに分割します.
	/// </summary>
	public static IEnumerable<IEnumerable<T>> Chunk<T>(this IEnumerable<T> self, int chunkSize)
	{
	if (chunkSize <= 0)
	{
	throw new ArgumentException("Chunk size must be greater than 0.", "chunkSize");
	}

	while (self.Any())
	{
	yield return self.Take(chunkSize);
	self = self.Skip(chunkSize);
	}
	}
	}
	// http://neue.cc/2013/12/04_435.html
	public static class TaskEnumerableExtensions
	{
	public static Task WhenAll(this IEnumerable<Task> tasks)
	{
	return Task.WhenAll(tasks);
	}

	public static Task<T[]> WhenAll<T>(this IEnumerable<Task<T>> tasks)
	{
	return Task.WhenAll(tasks);
	}
	}
	}