// ==UserScript==
// @name      hateBUZZ
// @namespace http://d.hatena.ne.jp/snaka72/
// @description   Show buzz of current page with Hatena Bookmarkers.
// @include   http://*
// @require   http://gist.github.com/raw/128813/e31dba7e13521499c0284c8b1af0bc4d553886d6/json2.js
// @require   http://gist.github.com/raw/128816/3890f29e5a215777a17765a928e8acae01662b69/GrowlMonkey.js
// ==/UserScript==

var HateBuzz = function(){
    // CONFIGURATION ///////////////////////////////////////////////////////////
    const DEBUG = false;
    var MAX_ITEMS = GM_getValue('max-items', 5);
    var AND_MORE = GM_getValue('and-more', true);
    var BUZZ_ONCE = GM_getValue('buzz-once', true);

    // CLASS   /////////////////////////////////////////////////////////////////
    function Hatebu(url) {
        this.url = url;
    }

    Hatebu.getUserIcon = function(user) {
        return "http://www.hatena.ne.jp/users/" + user.substr(0, 2) + "/" + user + "/profile.gif";
    };

    Hatebu.prototype = {
        eachBookmark: function(proc) {
            var cachedData = eval(GM_getValue(currentURL(), null));
            if (cachedData) {
                debug("キャッシュがヒット！ : " + currentURL());
                this._processForBookmarks(cachedData.bookmarks, proc);
                GM_setValue(currentURL(), cachedData.toSource());
                return;
            }

            debug("キャッシュにヒットしなかったのでリクエストします:" + currentURL());
            var that = this;
            GM_xmlhttpRequest({
                method: "GET",
                url: "http://b.hatena.ne.jp/entry/json/"+ currentURL(),
                onload: function(data) {
                    var json = eval(data.responseText);
                    if (!json.bookmarks) return;

                    that._processForBookmarks(json.bookmarks, proc);
                    GM_setValue(currentURL(), json.toSource());
                }
            });
        },

        _processForBookmarks: function(bookmarks, proc) {
            shuffle(MAX_ITEMS, bookmarks, function(bookmark) {
                if (bookmark.comment.length > 0) {
                    proc(bookmark);
                }
            });
        }
    };

    // PRIVATE /////////////////////////////////////////////////////////////////

    function MAX_ITEMS() {
        return 5;
    }
    
    function currentURL() {
        return window.top.location.href;
    }

    function shuffle(count, arr, func) {
        arr = BUZZ_ONCE ? arr : arrayCopy(arr);

        for(var i = 0; arr.length > 0 && i < count;) {
            var index = Math.floor(Math.random() * arr.length);
            var pick = (arr.splice(index, 1))[0];
            if (pick.comment.length == 0)
                continue;
            setTimeout(func, i++ * 1000, pick);
        }
    }

    function arrayCopy(arr) {
        return arr.slice();
    }

    // growl ...

    function register() {
        GrowlMonkey.register(
            HateBuzz.appname,
            "http://www.hatena.ne.jp/images/top/side_b.gif",
            [{
                name: "buzz",
                displayName: "Buzz!!",
                enabled: true
            }]
        );
    }

    function notify(title, message, icon){
        GrowlMonkey.notify(HateBuzz.appname, "buzz", title, message, icon);
    }

    function debug(msg) {
        DEBUG && notify("debug", msg);
    }

    // PUBLIC //////////////////////////////////////////////////////////////////
    var self = {
        appname : "hateBUZZ",
        hatebu  : null,

        main : function(){
            register();
            this.hatebu = new Hatebu(currentURL());
            this.hatebu.eachBookmark(function(bookmark) {
                notify(
                    bookmark.user,
                    bookmark.comment || "",
                    Hatebu.getUserIcon(bookmark.user)
                );
            });
        },

        clearCache : function() {
            GM_setValue(currentURL(), '');
            notify("HateBUZZ", currentURL() + "のキャッシュをクリアしました");
        },

        setMaxItems : function() {
            var max_items = prompt(
                "表示する人数を入力してください。(デフォルト:5)",
                GM_getValue('max-items', 5)
            );
            if (!max_items || max_items == "") {
                GM_setValue("max-items", '');
                return;
            }
            GM_setValue("max-items", max_items);
        },

        setBuzzAlways : function() {
            BUZZ_ONCE = false;
            GM_setValue("buzz-once", false);
            self.clearCache();
        },

        setBuzzOnce : function() {
            BUZZ_ONCE = true;
            GM_setValue("buzz-once", true);
        }
    }

    GM_registerMenuCommand("hateBUZZ!! - キャッシュクリア", self.clearCache);
    GM_registerMenuCommand("hateBUZZ!! - 最大人数の設定", self.setMaxItems);
    if (BUZZ_ONCE)
        GM_registerMenuCommand("hateBUZZ!! - 何度でもBUZZる", self.setBuzzAlways);
    else
        GM_registerMenuCommand("hateBUZZ!! - 一度っきりBUZZる", self.setBuzzOnce);

    return self;
}();

// initialize the whole works
window.addEventListener("load", function(e) {
     window.setTimeout(HateBuzz.main, 1000);
}, false);

// vim: sw=4 ts=4 et si