<%@ WebHandler Language="C#" Class="urlData" %>

using System;
using System.Web;
using System.Runtime.Serialization.Json;
using Newtonsoft.Json;
using Newtonsoft.Json.Linq;
using System.Web.Services.Protocols;
using System.Security.Cryptography;
using System.Text;
using System.Web.SessionState;
using System.Data;
using System.Collections.Generic;
using System.IO.Compression;
using System.Drawing;
using System.Drawing.Imaging;
using System.IO;
using System.Linq;
using Facebook;
using System.Net;
using System.Collections.Specialized;

public class urlData : IHttpHandler, IReadOnlySessionState {

    public void ProcessRequest (HttpContext context) {
        result objRet = new result();
        DataContractJsonSerializer json = new DataContractJsonSerializer(objRet.GetType());
        context.Response.ContentType = "application/json;charset=utf-8";
        context.Response.AddHeader("Access-Control-Allow-Origin", "*");

        string acceptEncoding = context.Request.Headers["Accept-Encoding"].ToString().ToUpperInvariant();
        if (!String.IsNullOrEmpty(acceptEncoding))
        {
            if (acceptEncoding.Contains("GZIP"))
            {
                //输出流头部GZIP压缩
                context.Response.AppendHeader("Content-encoding", "gzip");
                context.Response.Filter = new GZipStream(context.Response.Filter, CompressionMode.Compress);
            }
            else if (acceptEncoding.Contains("DEFLATE"))
            {
                //输出流头部DEFLATE压缩
                context.Response.AppendHeader("Content-encoding", "deflate");
                context.Response.Filter = new DeflateStream(context.Response.Filter, CompressionMode.Compress);
            }
        }

        string method = (context.Request["method"] == null) ? "" : context.Request["method"].ToString();
        string project_uid =  (context.Request["project_uid"] == null) ? "" : context.Request["project_uid"].ToString();
        string url_uid =  (context.Request["url_uid"] == null) ? "" : context.Request["url_uid"].ToString();
        string url_descript =  (context.Request["url_descript"] == null) ? "" : context.Request["url_descript"].ToString();
        string url_directToUrl =  (context.Request["url_directToUrl"] == null) ? "" : context.Request["url_directToUrl"].ToString();
        string url_Code =  (context.Request["url_Code"] == null) ? "" : context.Request["url_Code"].ToString();
        string url_gifTag =  (context.Request["url_gifTag"] == null) ? "N" : context.Request["url_gifTag"].ToString();
        string url_gifLink =  (context.Request["url_gifLink"] == null) ? "" : context.Request["url_gifLink"].ToString();
        string url_fbTag =  (context.Request["url_fbTag"] == null) ? "N" : context.Request["url_fbTag"].ToString();
        string url_fbTitle =  (context.Request["url_fbTitle"] == null) ? "" : context.Request["url_fbTitle"].ToString();
        string url_fbDescript =  (context.Request["url_fbDescript"] == null) ? "" : context.Request["url_fbDescript"].ToString();
        string url_fbPixel =  (context.Request["url_fbPixel"] == null) ? "N" : context.Request["url_fbPixel"].ToString();
        string url_fbPixelCode =  (context.Request["url_fbPixelCode"] == null) ? "" : context.Request["url_fbPixelCode"].ToString();
        string url_googleAds =  (context.Request["url_googleAds"] == null) ? "N" : context.Request["url_googleAds"].ToString();
        string url_googleAwConversionId =  (context.Request["url_googleAwConversionId"] == null) ? "" : context.Request["url_googleAwConversionId"].ToString();
        string url_playBtn = (context.Request["url_playBtn"] == null) ? "N" : context.Request["url_playBtn"].ToString();
        string pic_data = (context.Request["pic_data"] == null) ? "" : context.Request["pic_data"].ToString();
        string url_uploadFile = (context.Request["url_uploadFile"] == null) ? "N" : context.Request["url_uploadFile"].ToString();
        string url_uploadFileClientName = (context.Request["url_uploadFileClientName"] == null) ? "" : context.Request["url_uploadFileClientName"].ToString();
        string url_uploadFileLinkName = (context.Request["url_uploadFileLinkName"] == null) ? "" : context.Request["url_uploadFileLinkName"].ToString();
        string url_uploadFileType = (context.Request["url_uploadFileType"] == null) ? "" : context.Request["url_uploadFileType"].ToString();
        string url_photoId = "";

        authPermission objAuth = new authPermission();

        if (!objAuth.isLogin())
        {
            objRet.ret = "no";
            objRet.err_code = "0001";
            objRet.message = "尚未登入，請登入後使用";
            json.WriteObject(context.Response.OutputStream, objRet);
            return;
        }

        if (method == "")
        {
            objRet.ret = "no";
            objRet.err_code = "0999";
            objRet.message = "沒有Method，無法使用";
            json.WriteObject(context.Response.OutputStream, objRet);
            return;
        }

        string errmsg = "";

        if (method != "add") {
            if (url_uid == "") {
                errmsg += "沒有系統編號!\n";
            }
        }

        if (errmsg.Length > 0) {
            objRet.ret = "no";
            objRet.err_code = "0005";
            objRet.message = errmsg;
            json.WriteObject(context.Response.OutputStream, objRet);
            return;
        }

        if (method == "get")
        {
            urlObj objUrl = new urlObj(url_uid);

            objRet.ret = "yes";
            objRet.data = objUrl;
            json.WriteObject(context.Response.OutputStream, objRet);
            return;
        }

        if (method == "delete")
        {
            if (url_uid == "") {
                errmsg += "沒有系統編號!\n";
                objRet.ret = "no";
                objRet.err_code = "0005";
                objRet.message = errmsg;
                json.WriteObject(context.Response.OutputStream, objRet);
                return;
            }

            string delQuotationString = string.Format("update url set url_isRevoke = 'Y' where project_uid = '{0}' and url_uid = '{1}'", project_uid, url_uid);
            autoExecSQL objDel = new autoExecSQL(delQuotationString);

            if (objDel.effectDataCount > 0)
            {
                objRet.ret = "yes";
            }
            else {
                objRet.ret = "no";
                objRet.err_code = "0033";
                objRet.message = "無短網址被刪除，請重新整理後重新刪除!";
            }

            json.WriteObject(context.Response.OutputStream, objRet);
            return;
        }

        if (url_descript == "") {
            errmsg += "沒有短網址說明!\n";
        }

        if (url_Code == "") {
            errmsg += "沒有短網址碼!\n";
        }

        if (url_directToUrl == "") {
            errmsg += "沒有目的地網址!\n";
        }

        if (project_uid == "") {
            errmsg += "沒有專案代碼!\n";
        }

        if (url_gifTag == "Y") {
            if (url_gifLink == "") {
                errmsg += "沒有gif的網路連結位置!\n";
            }
        }

        if (url_fbTag == "Y") {
            if (pic_data == "")
            {
                errmsg += "沒有FB預覽圖片\n";
            }

            if (url_fbTitle == "")
            {
                errmsg += "沒有FB預覽標題!\n";
            }

            if (url_descript == "")
            {
                errmsg += "沒有FB預覽內容!\n";
            }
        }

        if (errmsg.Length > 0) {
            objRet.ret = "no";
            objRet.err_code = "0005";
            objRet.message = errmsg;
            json.WriteObject(context.Response.OutputStream, objRet);
            return;
        }

        if (method == "add") {
            string checkString = string.Format("select * from url where url_Code Collate SQL_Latin1_General_CP1_CS_AS = '{0}'", url_Code);
            autoBindDataTable checkSQL = new autoBindDataTable(checkString);

            if (checkSQL.dataRows.Count > 0) {
                objRet.ret = "no";
                objRet.err_code = "0006";
                objRet.message = "此短網址已經被使用了，請換一組短網址碼再試一次!";
                json.WriteObject(context.Response.OutputStream, objRet);
                return;
            }

            url_uid = globalClass.CreateRandomCode(32);
            url_photoId = globalClass.CreateRandomCode(36);

            urlObj objUrl = new urlObj();
            objUrl.url_uid = url_uid;
            objUrl.project_uid = project_uid;
            objUrl.url_descript = url_descript;
            objUrl.url_directToUrl = url_directToUrl;
            objUrl.url_Code = url_Code;
            objUrl.url_playBtn = url_playBtn;
            objUrl.url_fbTag = url_fbTag;
            objUrl.url_gifTag = url_gifTag;
            objUrl.url_gifLink = url_gifLink;
            objUrl.url_fbTitle = url_fbTitle;
            objUrl.url_fbDescript = url_fbDescript;
            objUrl.url_fbPixel = url_fbPixel;
            objUrl.url_fbPixelCode = url_fbPixelCode;
            objUrl.url_googleAds = url_googleAds;
            objUrl.url_googleAwConversionId = url_googleAwConversionId;
            objUrl.url_createUid = objAuth.user_uid;
            objUrl.url_photoId = url_photoId;
            objUrl.url_uploadFile = url_uploadFile;
            objUrl.url_uploadFileClientName = url_uploadFileClientName;
            objUrl.url_uploadFileLinkName = url_uploadFileLinkName;
            objUrl.url_uploadFileType = url_uploadFileType;

            string picChange = "N";

            JToken jsonObj;

            string base64Img = "";


            try
            {
                jsonObj = JValue.Parse(pic_data);
                picChange = jsonObj[0]["meta"]["picChange"].ToString();
                base64Img = jsonObj[0]["output"]["image"].ToString();
            }
            catch {

            }

            if (picChange == "Y")
            {
                //base64Img = jsonObj[0]["output"]["image"].ToString();
                objUrl.pic_image = globalClass.Base64ToImage(base64Img);

                //if (objUrl.pic_image.Width > 702) {
                //    float ratoF = 702f / float.Parse(objUrl.pic_image.Width.ToString());
                //    int newW = Convert.ToInt32(objUrl.pic_image.Width * ratoF);
                //    int newH = Convert.ToInt32(objUrl.pic_image.Height * ratoF);
                //    objUrl.pic_image = globalClass.resizeImage(objUrl.pic_image, newW, newH);
                //}
            }

            try
            {

                objUrl.updateData();
                objRet.data = objUrl;
                objRet.ret = "yes";
            }
            catch (Exception ex)
            {
                objRet.ret = "no";
                objRet.err_code = "9999";
                objRet.message = ex.Message;
            }


            json.WriteObject(context.Response.OutputStream, objRet);
            return;
        }

        if (method == "edit") {
            Boolean isChange = false;

            urlObj objUrl = new urlObj(url_uid);

            if (objUrl.url_Code == "") {
                objRet.ret = "no";
                objRet.err_code = "0009";
                objRet.message = "無此url_uid資料!";
                json.WriteObject(context.Response.OutputStream, objRet);
                return;
            }

            if (objUrl.url_gifLink != url_gifLink) {
                isChange = true;
            }

            if (objUrl.url_fbTag != url_fbTag) {
                isChange = true;
            }

            if (objUrl.url_playBtn != url_playBtn) {
                isChange = true;
            }

            if (objUrl.url_directToUrl != url_directToUrl) {
                isChange = true;
            }

            if (objUrl.url_fbTitle != url_fbTitle) {
                isChange = true;
            }

            if (objUrl.url_fbDescript != url_fbDescript) {
                isChange = true;
            }

            string base64Img = "";
            string picChange = "N";
            JToken jsonObj;

            try
            {
                jsonObj = JValue.Parse(pic_data);
                picChange = jsonObj[0]["meta"]["picChange"].ToString();
            }
            catch {
                jsonObj = null;
            }

            if (picChange == "Y")
            {
                isChange = true;
                base64Img = jsonObj[0]["output"]["image"].ToString();
                objUrl.pic_image = globalClass.Base64ToImage(base64Img);

                //if (objUrl.pic_image.Width > 702) {
                //    float ratoF = 702f / float.Parse(objUrl.pic_image.Width.ToString());
                //    int newW = Convert.ToInt32(objUrl.pic_image.Width * ratoF);
                //    int newH = Convert.ToInt32(objUrl.pic_image.Height * ratoF);
                //    objUrl.pic_image = globalClass.resizeImage(objUrl.pic_image, newW, newH);
                //}
            }

            objUrl.url_descript = url_descript;
            objUrl.url_directToUrl = url_directToUrl;
            objUrl.url_playBtn = url_playBtn;
            objUrl.url_gifTag = url_gifTag;
            objUrl.url_gifLink = url_gifLink;
            objUrl.url_fbTag = url_fbTag;
            objUrl.url_fbTitle = url_fbTitle;
            objUrl.url_fbDescript = url_fbDescript;
            objUrl.url_fbPixel = url_fbPixel;
            objUrl.url_fbPixelCode = url_fbPixelCode;
            objUrl.url_googleAds = url_googleAds;
            objUrl.url_googleAwConversionId = url_googleAwConversionId;
            objUrl.url_uploadFileLinkName = url_uploadFileLinkName;
            objUrl.url_uploadFile = url_uploadFile;
            objUrl.url_uploadFileClientName = url_uploadFileClientName;
            objUrl.url_uploadFileType = url_uploadFileType;

            if (objUrl.updateData())
            {
                if (isChange) {
                    try
                    {
                        string AppID = "563584377383502";
                        string AppSecret = "0a8211ad839ec0ffbd5955ef3d4709ec";

                        WebClient wc = new WebClient(); //每次重新取一次token

                        string result = wc.DownloadString("https://graph.facebook.com/oauth/access_token?client_id=" + AppID + "&client_secret=" + AppSecret + "&grant_type=client_credentials");//自動取得發文授權碼
                        dynamic resultJson = JValue.Parse(result);
                        string access_token = resultJson["access_token"];

                        string url = string.Format("https://graph.facebook.com/?id={0}&scrape=true", HttpUtility.UrlEncode(objUrl.url_shortUrl));

                        HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
                        request.Method = "POST";
                        //request.ContentType = "application/x-www-form-urlencoded";

                        //必須透過ParseQueryString()來建立NameValueCollection物件，之後.ToString()才能轉換成queryString
                        NameValueCollection postParams = System.Web.HttpUtility.ParseQueryString(string.Empty);

                        postParams.Add("access_token", access_token);

                        //Console.WriteLine(postParams.ToString());// 將取得"version=1.0&action=preserveCodeCheck&pCode=pCode&TxID=guid&appId=appId", key和value會自動UrlEncode
                        //要發送的字串轉為byte[] 
                        byte[] byteArray = Encoding.UTF8.GetBytes(postParams.ToString());
                        using (Stream reqStream = request.GetRequestStream())
                        {
                            reqStream.Write(byteArray, 0, byteArray.Length);
                        }//end using

                        //API回傳的字串
                        string responseStr = "";
                        //發出Request
                        using (WebResponse response = request.GetResponse())
                        {
                            using (StreamReader sr = new StreamReader(response.GetResponseStream(),Encoding.UTF8))
                            {
                                responseStr = sr.ReadToEnd();
                            }//end using  
                        }

                        dynamic resultStrJson = JValue.Parse(responseStr);
                    }
                    catch
                    {

                    }
                }

                objRet.ret = "yes";
                objRet.data = objUrl;
                json.WriteObject(context.Response.OutputStream, objRet);
                return;
            }
            else {
                objRet.ret = "no";
                objRet.message = objUrl.update_result;
                objRet.data = objUrl;
                json.WriteObject(context.Response.OutputStream, objRet);
                return;
            }
        }
    }

    public class result
    {
        public string ret = "no";
        public string err_code = "0000";
        public string message = "";
        public urlObj data = new urlObj();
    }

    public bool IsReusable {
        get {
            return false;
        }
    }

}