/**
 * RSSリーダー（同一ドメインのみ） Version 1.3.1
 * 複数指定したRSS1.0、RSS2.0を読み、日付の新しい順にソートして、指定件数分テーブルタグで出力する。
 * 使い方：new CorebloRss(出力先タグID, RSSのUrlリスト(RSS毎に付加するスタイルクラス、付加タイトル[trueはRSSのタイトル]), 表示件数, newのスタイルクラスを設定する日数, 読み込み待ち時表示タグ, リンクを新しいウインドウで開くかどうか, 本文表示文字数（NULLでタグごと非表示、0で文字数制限なし）, 除外する記事のタイトル文字列（前方一致）配列);
 * 例：new CorebloRss("target", new Array(
 *           {url:"./rss/rss1.rdf", "class":"user1", "title": true}
 *         , {url:"./rss/rss2.xml", "class":"user2", "title": "タイトル"}
 *     ), 10, 5, "Now loading...", false, 0, new Array('PR: ', '[PR] '));
 *
 * Copyright (C) 2012-2016 maverica corporation. All Rights Reserved.
 */
var CorebloRss = function(id, rssList, dispCnt, newDays, loadingStr, isNewWindow, bodyLength, excludeTitleStrList) {
	this.target = document.getElementById(id);
	if(loadingStr) {
		this.setText(loadingStr);
	}
	this.infoList = new Array();
	this.rssList = rssList;
	this.dispCnt = dispCnt;
	this.newDays = newDays;
	this.isNewWindow = isNewWindow;
	this.bodyLength = bodyLength;
	this.excludeTitleStrList = excludeTitleStrList;

	var myObj = this;
	setTimeout(function() {myObj.getRss();}, 50);
};
CorebloRss.prototype = {
	draw:function() {
		var child = this.target.firstChild;
		while(child.nextSibling) {
			this.target.removeChild(child.nextSibling);
		}
		this.target.removeChild(child);

		var newTime = new Date();
		newTime -= (this.newDays * 86400000);

		if(this.infoList.length > 0) {
			var ulObj = document.createElement("ul");
			this.target.appendChild(ulObj);
			for(var i=0; i<this.infoList.length; i++) {
				var liObj = document.createElement("li");
				if(this.infoList[i][3] !== "") {
					liObj.setAttribute("class", this.infoList[i][3]);
				}
				ulObj.appendChild(liObj);

				//NEW
				var dateData= new Date();
				dateData.setTime(this.infoList[i][0]);
				if(newTime < dateData) {
					var divObj = document.createElement("div");
					var spanObj = document.createElement("span");
					divObj.setAttribute("class", "new_ic");
					spanObj.setAttribute("class", "new");
					spanObj.appendChild(document.createTextNode("NEW"));
					divObj.appendChild(spanObj);
					liObj.appendChild(divObj);
				}

				//日付
				var divObj = document.createElement("div");
				divObj.setAttribute("class", "date");
				var dateObj = document.createElement("span");
				var month = dateData.getMonth()+1;
				if(month < 10) {
					month = "0" + month;
				}
				var day = dateData.getDate();
				if(day < 10) {
					day = "0" + day;
				}
				dateObj.appendChild(document.createTextNode(
					dateData.getFullYear()+"/"+month+"/"+day
				));
				divObj.appendChild(dateObj);
				liObj.appendChild(divObj);

				//RSSタイトル
				if(this.infoList[i][4] !== "") {
					var divObj = document.createElement("div");
					divObj.setAttribute("class", "rss_title");

					var spanObj = document.createElement("span");
					spanObj.appendChild(document.createTextNode(this.infoList[i][4]));
					divObj.appendChild(spanObj);
					liObj.appendChild(divObj);

				//項目タイトル
				var divObj = document.createElement("div");
				divObj.setAttribute("class", "item_title");
				var spanObj = document.createElement("span");
				var aObj = document.createElement("a");
				aObj.appendChild(document.createTextNode(this.infoList[i][1]));
				aObj.setAttribute("href", this.infoList[i][2]);
				if(this.isNewWindow) {
					aObj.setAttribute("target", "_blank");
				}
				spanObj.appendChild(aObj);
				divObj.appendChild(spanObj);
				liObj.appendChild(divObj);

				//本文
				if(this.bodyLength != null) {
					var divObj = document.createElement("div");
					divObj.setAttribute("class", "txt");
					var textStr = this.infoList[i][5].replace(/<.+?>/g, "");
					if(this.bodyLength != 0 && textStr.length > this.bodyLength) {
						textStr = textStr.substr(0, this.bodyLength)+"...";
					}
					divObj.appendChild(document.createTextNode(textStr));
					liObj.appendChild(divObj);
				}
				}
			}
		} else {
			this.target.appendChild(document.createTextNode("ニュースはありません。"));
		}
	},
	setText: function(str) {
		this.target.innerHTML = str;
	},
	diffFunc:function(a, b) {
		return(b[0] - a[0]);
	},
	getHttpObj:function() {
		if(window.XMLHttpRequest) {
			return new XMLHttpRequest();
		} else if(window.ActiveXObject) {
			return new ActiveXObject("Microsoft.XMLHTTP");
		} else {
			throw "err";
		}
	},
	getRss:function() {
		if(this.rssList.length > 0) {
			var rssInfo = this.rssList.shift();
			try {
				var httpObj = this.getHttpObj();
				httpObj.open("GET", rssInfo["url"], true);
				var myObj = this;
				httpObj.onreadystatechange = function(){
					if(httpObj.readyState == 4) {
						if(httpObj.status == 200) {
							var xml = httpObj.responseXML;
							if(xml) {
								var title = "";
								if(rssInfo["title"]) {
									if(typeof(rssInfo["title"]) == "string") {
										title = rssInfo["title"];
									} else {
										title = xml.getElementsByTagName("title")[0].firstChild.nodeValue;
									}
								}

								var list = xml.getElementsByTagName("item");	//RSS
								if(list.length === 0) {
									list = xml.getElementsByTagName("entry");	//ATOM
								}
								if(list.length > 0) {
									for(var i=0; i < list.length; i++) {
										var contentsTitle = list[i].getElementsByTagName("title")[0].firstChild.nodeValue;
										if(myObj.excludeTitleStrList
										&& Object.prototype.toString.call(myObj.excludeTitleStrList) === '[object Array]'
										&& myObj.excludeTitleStrList.length > 0) {
											var isBreak = false;
											for(var j in myObj.excludeTitleStrList) {
												if(contentsTitle.indexOf(myObj.excludeTitleStrList[j])===0) {
													isBreak = true;
													break;
												}
											}
											if(isBreak) {
												continue;
											}
										}

										var dateTime = null;
										var tmpObj1 = list[i].getElementsByTagName("pubDate")[0];	//RSS2.0
										var tmpObj2 = list[i].getElementsByTagName("dc:date")[0];	//RSS1.0
										if(!tmpObj2) {
											tmpObj2 = list[i].getElementsByTagName("date")[0];	//RSS1.0
										}
										if(!tmpObj2) {
											tmpObj2 = list[i].getElementsByTagName("published")[0];	//ATOM1.0
										}
										if(!tmpObj2) {
											tmpObj2 = list[i].getElementsByTagName("issued")[0];	//ATOM0.3
										}
										if(tmpObj1) {
											dateTime = Date.parse(tmpObj1.firstChild.nodeValue);
										} else if(tmpObj2) {
											dateTime = myObj.parseDate(tmpObj2.firstChild.nodeValue);
										} else {
											continue;
										}
										var bodyText = "";
										var tmpObj3 = list[i].getElementsByTagName("content:encoded")[0];	//RSS1.0
										if(!tmpObj3) {
											tmpObj3 = list[i].getElementsByTagName("description")[0];	//RSS2.0
											if(!tmpObj3) {
												tmpObj3 = list[i].getElementsByTagName("content")[0];	//ATOM0.3/1.0
											}
										}
										if(tmpObj3) {
											bodyText = tmpObj3.firstChild.nodeValue;
										}

										if(dateTime) {
											var classStr = "";
											if(rssInfo["class"]) {
												classStr = rssInfo["class"];
											}
											var link = "";
											if(list[i].getElementsByTagName("link")[0].firstChild) {
												link = list[i].getElementsByTagName("link")[0].firstChild.nodeValue; 	//RSS
											} else {
												link = list[i].getElementsByTagName("link")[0].getAttribute("href"); 	//ATOM
											}
											myObj.infoList.push(new Array(
												 dateTime
												,contentsTitle
												,link
												,classStr
												,title
												,bodyText
											));
											myObj.infoList.sort(myObj.diffFunc);
											if(myObj.infoList.length > myObj.dispCnt) {
												myObj.infoList = myObj.infoList.slice(0, myObj.dispCnt);
											}
										}
									}
								}
								setTimeout(function() {myObj.getRss();}, 50);
							} else {
								myObj.setText("Error:解析エラー["+rssInfo["url"]+"]");
							}
						} else {
							myObj.setText("Error:HTTPエラー["+rssInfo["url"]+"]");
						}
					}
				};
				httpObj.send("");

			} catch(e) {
				this.setText("Error:このブラウザではリクエストできません");
			}
		} else {
			this.draw();
		}
	},
	parseDate:function(dateStr) {
		//ブラウザにより数値形式をパースできない場合がある
		//dateTime = Date.parse(dateStr);
		dateStr = dateStr.replace("Z", "");
		var tmpList = dateStr.split("T");
		var tmpDate = tmpList[0].split("-");
		var timeStr = tmpList[1];
		var pos = timeStr.indexOf("+");
		if(pos !== -1) {
			timeStr = timeStr.substring(0, pos);
		}
		pos = timeStr.indexOf("-");
		if(pos !== -1) {
			timeStr = timeStr.substring(0, pos);
		}
		var tmpTime = timeStr.split(":");
		return Date.UTC(tmpDate[0], tmpDate[1]-1, tmpDate[2], tmpTime[0], tmpTime[1], tmpTime[2]);
	}
};