// ==UserScript==
// @name        Hatena::Group: Recent Entries
// @namespace   http://lowreal.net/
// @include     https://*.g.hatena.ne.jp/
// @include     http://*.g.hatena.ne.jp/
// @require     http://svn.coderepos.org/share/lang/javascript/jsdeferred/trunk/jsdeferred.userscript.js
// @require     http://gist.github.com/3239.txt#createElementFromString
// @require     http://gist.github.com/46391.txt#duration
// @require     http://gist.github.com/120040.txt#ambtime
// ==/UserScript==
 
$E = createElementFromString;
 
(function () { with (D()) {
	// 10 件表示する
	var count  = 10;
	var recent = [];
 
	var ns = {
		"rdf"     : "http://www.w3.org/1999/02/22-rdf-syntax-ns#",
		"rss"     : "http://purl.org/rss/1.0/",
		"dc"      : "http://purl.org/dc/elements/1.1/",
		"content" : "http://purl.org/rss/1.0/modules/content/"
	};
 
	function $XR (exp, context, type /* want type */) {
		if (typeof context == "function") {
			type    = context;
			context = null;
		}
		if (!context) context = document;
		exp = (context.ownerDocument || context).createExpression(exp, function (prefix) {
			return ns[prefix];
		});
 
		switch (type) {
			case String:  return exp.evaluate(context, XPathResult.STRING_TYPE, null).stringValue;
			case Number:  return exp.evaluate(context, XPathResult.NUMBER_TYPE, null).numberValue;
			case Boolean: return exp.evaluate(context, XPathResult.BOOLEAN_TYPE, null).booleanValue;
			case Array:
				var result = exp.evaluate(context, XPathResult.ORDERED_NODE_SNAPSHOT_TYPE, null);
				for (var ret = [], i = 0, len = result.snapshotLength; i < len; i++) {
					ret.push(result.snapshotItem(i));
				}
				return ret;
			case undefined:
				var result = exp.evaluate(context, XPathResult.ANY_TYPE, null);
				switch (result.resultType) {
					case XPathResult.STRING_TYPE : return result.stringValue;
					case XPathResult.NUMBER_TYPE : return result.numberValue;
					case XPathResult.BOOLEAN_TYPE: return result.booleanValue;
					case XPathResult.UNORDERED_NODE_ITERATOR_TYPE:
						// not ensure the order.
						var ret = [], i = null;
						while ((i = result.iterateNext())) ret.push(i);
						return ret;
				}
				return null;
			default: throw(TypeError("$X: specified type is not valid type."));
		}
	}
 
	var container = $E("<div />");
	var main = document.querySelector("div.main") || document.querySelector("div.hatena-body");
	main.insertBefore(container, main.firstChild);
 
	var title     = $E("<div class='recentitem_diary'>最新エントリ <span class='status'></span></div>");
	container.appendChild(title);
	with (title.style) {
		fontWeight = "bold";
	}
	with (title.status.style) {
		fontSize = "80%";
	}
 
	var num = 1;
	function addEntry (entry) {
		entry.num = num++;
		console.log(entry);
 
		var date = entry.date;
		var m    = date.match(/(\d\d\d\d)-(\d\d)-(\d\d)(?:T(\d\d):(\d\d):(\d\d))?/);
		var d    = m[4] ? new Date(+m[1], +m[2] - 1, +m[3], +m[4], +m[5], +m[6])
		                : new Date(+m[1], +m[2] - 1, +m[3]);
		entry.ambdate = ambtime(d);
 
		var e = $E(<><![CDATA[
			<div class="day">
				<h2>
					<a href="#{link}">#{num}: <span class="title">#{title}</span></a>
					<a href="/#{creator}/" style="font-size: 80%"><span class="title">id:#{creator}</span></a>
					<div class="date" style="font-size: 80%; text-align: right">#{ambdate} #{date}</div>
				</h2>
				<div class="body">
					<div class="section">
					</div>
				</div>
			</div>
		]]></>.toString(), {
			parent: container,
			data : entry
		});
		if (entry.encoded) {
			e.body.innerHTML = entry.encoded;
		} else {
			e.section.innerHTML = entry.content;
		}
	}
 
	// [1]
	//   1, 2, 5
	// [3]
	//   3, 4
	// [6]
	//   6
	//
	// エントリフィードを1つとってくる
	// エントリリストにうち、エントリフィード最新より新しいエントリは確定
	// 確定したエントリが n に達したら終了
 
	http.get("/diarylist?mode=rss").
	next(function (req) {
		var diarylist = $XR("/rdf:RDF/rss:item", req.responseXML);
 
		var entries = [], loadedNum = 0;
		return loop(diarylist.length, function (i) {
			var item = diarylist[i];
			var about = item.getAttributeNS(ns.rdf, "about").replace(/^https?:/, location.protocol);
			var rss  =  about + "rss";
			var date = $XR("string(dc:date)", item);
			if (rss.match(/\/hatena\w+\//)) return null; // skip;
 
			entries = entries.filter(function (e) {
				if (e.date > date) {
					addEntry(e);
					loadedNum++;
					return false;
				} else {
					return true;
				}
			});
 
			if (loadedNum >= count) {
				throw "done";
			}
 
			title.status.innerHTML = "Fixed: " + loadedNum + " Requesting Next... " + rss;
			return http.get(rss).next(function (req) {
				var entrylist = $XR("/rdf:RDF/rss:item", req.responseXML);
				for (var i = 0, len = entrylist.length; i < len; i++) {
					var entry = entrylist[i];
					entries.push({
						title:   $XR("string(rss:title)", entry),
						link:    $XR("string(rss:link)", entry),
						date:    $XR("string(dc:date)", entry),
						creator: $XR("string(dc:creator)", entry),
						content: $XR("string(rss:description)", entry),
						encoded: $XR("string(content:encoded)", entry)
					});
				}
				entries = entries.sort(function (a, b) {
					if (a.date < b.date) return  1;
					if (a.date > b.date) return -1;
					return 0;
				});
			});
		}).
		next(function () {
			while (entries.length && loadedNum < count) {
				addEntry(entries.shift());
				loadedNum++;
			}
		}).
		error(function (e) {
			if (e != "done") throw e;
		}).
		next(function () {
			title.status.innerHTML = "";
		})
	}).
	error(function (e) {
		alert(e);
	});
} })();