// ==UserScript==
// @name        pixiv helper
// @namespace   http://mfish.twbbs.org/
// @include     http://www.pixiv.net/member_illust.php?mode=medium&illust_id=*
// @version     0.1
// @description A small script to download the new png animated image in pixiv
// @grant       GM_registerMenuCommand
// @grant       GM_openInTab
// @downloadURL none
// ==/UserScript==

var global = unsafeWindow;
GM_registerMenuCommand( '下載檔案!', downloadSmall);
GM_registerMenuCommand( '下載檔案!(大圖)', downloadFullScreen);

function checkUp() {
    if (!global.pixiv.context.ugokuIllustData) {
        alert('這看起來只是一般的gif或靜圖歐，請直接右鍵下載！');
        throw new Error('can not found zipped image source');
    }
}

function downloadSmall() {
    checkUp()
    var context = global.pixiv.context;
    var illustrate = context.ugokuIllustData;
    var src = illustrate.src;
    download(src);
}

function downloadFullScreen() {
    checkUp()
    var context = global.pixiv.context;
    var illustrate = context.ugokuIllustFullscreenData;
    var src = illustrate.src;
    download(src);
}

function download(src) {
    //console.log(src);
    var oReq = new XMLHttpRequest();
    oReq.open("GET", src, true);
    oReq.responseType = "blob";

    oReq.onload = function (oEvent) {
        var blob, objectURL;
        blob = oReq.response; // Note: not oReq.responseText
        if (blob) {
            //alert('success');
            //console.log(blob);
            objectURL = URL.createObjectURL(blob);
            //console.log(objectURL);
            //window.open(objectURL);
            GM_openInTab(objectURL);
        }
    };
    oReq.send(null);
}