// ==UserScript==
// @name          LDR + ?B comments for Firefox3
// @namespace     http://d.hatena.ne.jp/monjudoh/
// @include       http://reader.livedoor.com/reader/*
// ==/UserScript==

(function () {
	var regex = [
		[/\?ref=rss$/, ''],
		[/&from=rss$/, ''],
		[/cgi\.itmedia\.co\.jp\/rss\/bizid_1\.0\/www/, 'www.itmedia.co.jp']
	];
	
	var entryurl = "http://b.hatena.ne.jp/entry/";
	var jsonapiurl = "http://b.hatena.ne.jp/entry/json/";
	var imageapiurl = "http://b.hatena.ne.jp/entry/image/";
	
	var w = unsafeWindow;
	
	with (w) {
		var bmdiv = {};
		
		function getComment(link) {
			var url = jsonapiurl + '?url=' + escape(link) + '&callback=appendComment';
			var jsonp = document.createElement('script');
			jsonp.src = url;
			jsonp.onload = function() {
				message('\u8aad\u307f\u8fbc\u307f\u5b8c\u4e86');
				document.body.removeChild(jsonp);
			};
			message('\u30b3\u30e1\u30f3\u30c8\u8aad\u307f\u8fbc\u307f\u4e2d...');
			document.body.appendChild(jsonp);
		}
		
		w.appendComment = function(json) {
			var url = json.url;
			var d = $(bmdiv[url]);
			if (!d) return;
			delete bmdiv[url];
			
			var bm = json.bookmarks;
			var len = bm.length;
			var max = 100;
			for (var i = 0; i < len && i < max; i++) {
				var user = bm[i];
				var name = user.user;
				var date = getDate(user.timestamp);
				var div = document.createElement('div');
				div.innerHTML = '<img src="http://www.hatena.ne.jp/users/' + name.substring(0,2) + '/' + name + '/profile_s.gif">'
					+ ' <a href="http://b.hatena.ne.jp/' + name + '/' + date + '#bookmark-' + json.eid + '">' + name + '</a>'
					+ ' <span class="tags">'
					+ user.tags.map(function(x){ return '<a href="http://b.hatena.ne.jp/'+name+'/'+x+'/">'+x+'</a>' }).join(', ')
					+ '</span> ' + user.comment;
				d.appendChild(div);
			}
		};
		
		register_hook('after_init', function() {
			Keybind.add('m', function() {
				var item = get_active_item(true);
				var url = item.link;
				if (bmdiv[url]) {
					getComment(filter(url));
				} else {
					toggleComment($('comment_'+item.offset));
				}
			});
		});
		
		function toggleComment(elm) {
			elm.style.display = (elm.style.display != 'none') ? 'none' : 'block';
		}
		
		register_hook('before_printfeed', function(feed) {
			bmdiv = {};
			var items = feed.items;
			var len = items.length;
			for (var i = 0; i < len; i++) {
				var item = items[i];
				var url = escape(filter(item.link));
				id = 'comment_' + (i+1);
				item.body = '<div class="hatebu">'
					+ '<a href="' + entryurl + url + '"><img src="' + imageapiurl + url + '" style="border:none"></a>'
					+ '<div class="bookmarks" id="'+ id +'"></div>'
					+'</div>' + item.body;
				bmdiv[item.link] = id;
			}
		});
		
		var style = document.createElement('style');
		style.innerHTML = 'div.hatebu { margin: 3px; }'
			+ 'div.hatebu a { border: none; }'
			+ 'div.hatebu span.tags a { font-size: 90%; color: #66c; text-decoration: none; }';
		document.body.appendChild(style);
	}
	
	function filter(url) {
		for (var i = 0; i < regex.length; i++) {
			var r = regex[i];
			if (url.match(r[0])) return url.replace(r[0], r[1]);
		}
		return url;
	}
	
	function getDate(timestamp) {
		var date = new Date(timestamp);
		var y = date.getFullYear();
		var m = date.getMonth() + 1;
		var d = date.getDate();
		if (m < 10) m = "0" + m;
		if (d < 10) d = "0" + d;
		return y + m + d;
	}
})();