// ==UserScript==
// @name        Bloglines meets Hatena Bookmark
// @namespace   http://www.m4i.jp/
// @include     http://www.bloglines.com/myblogs_display?*
// @include     http://www.bloglines.com/public_display?*
// @version     1.0.2
// ==/UserScript==


(function(){

    Function.prototype.bind = function(object) {
        var __method = this;
        return function() {
            return __method.apply(object, arguments);
        };
    };

    function XMLRPC() {
        this.calls  = [];
        this.called = 0;
        this.chunk  = 0;
    }
    XMLRPC.prototype = {
        proxy: function(endPoint)
        {
            this.endPoint = endPoint;
            return this;
        },
        call: function(method, params)
        {
            this.parts = this.chunk ? Math.ceil(params.length / this.chunk) : 1;
            for (var i = 0; i < this.parts; i++) {
                var call =
                    <methodCall>
                        <methodName>{method}</methodName>
                        <params></params>
                    </methodCall>
                ;
                var param = this.chunk ?
                    params.slice(this.chunk * i, this.chunk * (i + 1)) : params;
                for (var j = 0; j < param.length; j++) {
                    call..params.appendChild(
                        <param><value><string>{param[j]}</string></value></param>
                    );
                }
                this.calls.push(call);
            }
            return this;
        },
        result: function(callback)
        {
            this.callback = callback;
            for (var i = 0; i < this.parts; i++) {
                GM_xmlhttpRequest({
                    method: 'post',
                    url: this.endPoint,
                    data: this.calls[i].toString(),
                    onload: this._loadHandler.bind(this)
                });
            }
            return this;
        },
        split: function(chunk)
        {
            this.chunk = chunk;
            return this;
        },
        _loadHandler: function(res)
        {
            var response = new XML(res.responseText.replace(/^<\?xml.*?\?>/, ''));
            if (this.response) {
                this.response..struct.appendChild(response..member);
            } else {
                this.response = response;
            }
            if (++this.called == this.parts) {
                this.callback(this.response);
            }
        }
    };


    var entryURI = 'http://b.hatena.ne.jp/entry/';
    var endPoint = 'http://b.hatena.ne.jp/xmlrpc';

    var item_expr = '//div[starts-with(@id, "siteItem.")]';

    var uris = [];
    var hrefs = document.evaluate(
        item_expr + '/h3/a/@href', document, null,
        XPathResult.ORDERED_NODE_ITERATOR_TYPE, null);
    var href;
    while (href = hrefs.iterateNext()) {
        uris.push(href.nodeValue);
    }

    new XMLRPC()
        .split(50)
        .proxy(endPoint)
        .call('bookmark.getCount', uris)
        .result(function(response) {
            var members = {};
            for each (var member in response..member) {
                members[member.name] = member..int;
            }
            var items = document.evaluate(
                item_expr, document, null,
                XPathResult.ORDERED_NODE_SNAPSHOT_TYPE, null);
            for (var i = 0; i < items.snapshotLength; i++) {
                var uri = document.evaluate(
                    './h3/a/@href', items.snapshotItem(i), null,
                    XPathResult.FIRST_ORDERED_NODE_TYPE, null).singleNodeValue.nodeValue;
                var ul = document.evaluate(
                    './div/ul[@class="item_nav"]', items.snapshotItem(i), null,
                    XPathResult.FIRST_ORDERED_NODE_TYPE, null).singleNodeValue;

                var users = members[uri];
                if (!Number(users)) continue;

                var a = document.createElement('a');
                var li = document.createElement('li');
                a.setAttribute('href', entryURI + uri.replace(/#/, '%23'));
                a.setAttribute('target', '_blank');
                a.setAttribute('class', users >= 10 ? 'hottest' :
                                        users >=  5 ? 'hotter'  :
                                                      'hot');
                a.appendChild(document.createTextNode(
                    '?B: ' + users + (users == 1 ? ' user' : ' users')));
                li.appendChild(a);
                ul.appendChild(li);
            }
        });

    var style = document.createElement('style');
    style.setAttribute('type', 'text/css');
    style.innerHTML
        =  '.hotter'
        +  '{'
        +  '	color: #ff6666 !important;'
        +  '	background-color: #fff0f0;'
        +  '	font-weight: bold;'
        +  '	font-style: normal;'
        +  '}'
        +  '.hottest'
        +  '{'
        +  '	color: red !important;'
        +  '	background-color: #ffcccc;'
        +  '	font-weight: bold;'
        +  '	font-style: normal;'
        +  '}';
    document.getElementsByTagName('head')[0].appendChild(style);

})();