[Let] Count livedoor reader subscribers

koichi99 — 2013-11-25T14:51:08Z
/*
 * @title Count livedoor reader subscribers
 * @description livedoor reader 登録数
 * @include http://*
 * @license MIT License
 * @require 
 */

var rssURLs;
var allcount = 0;
(function main() {
	rssURLs = getRssURLFromDocuments();
	
	var targetURL = rssURLs.shift();
    if(targetURL == null) {
        alert("Not Found RSS URL");
        return;
    }

	nextFeeds(targetURL);
})();

function nextFeeds(feeds) {
	if(feeds == undefined) {
		var titleElements = document.getElementsByTagName("title");
		var siteTitle = ""
		if(titleElements.length > 0) {
			siteTitle = titleElements[0].text;
		}
		alert(siteTitle + "の購読者: " + allcount);
		return;
	}
	
    
    var url = 'http://rpc.reader.livedoor.com/count?feedlink=' + encodeURI(feeds) + '&amp;callback=getCount';
    
    loadJS(url);
}

function loadJS(src) {
	var script =  document.createElement('script');
	script.src = src;
	script.id = "livedoorreadercount";
	document.body.appendChild(script);
}

function getCount(count) {
	if(count > 0) {
		allcount += parseInt(count);
	}
	
	document.body.removeChild(document.getElementById("livedoorreadercount"));

	nextFeeds(rssURLs.shift());
}

function getRssURLFromDocuments() {
    var linkTags = document.getElementsByTagName("link");
    var rss = new Array();
    for (var i = 0; i < linkTags.length; i++) {
        var elem = linkTags[i];
        if (elem.getAttribute("rel") == "alternate" && /(xml|rss)/.test(elem.getAttribute("type"))) {
            rss.push(elem.href);
        }
    }
    
    return rss;
}
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[Let] Count livedoor reader subscribers
