// ==UserScript==
// @name         煎蛋收藏
// @namespace    http://jandan.net/
// @version      0.1.1
// @description  收藏煎蛋链接并导出成csv格式 
// @author       凉风有信
// @match        https://*.jandan.net/*
// ==/UserScript==

(function() {
    'use strict';
    var list = new Array();

    let comment_list = document.querySelectorAll('li[id*="comment-"]');
    for(var i = 0; i < comment_list.length; i++) {
        let html = comment_list[i].querySelector(".author").innerHTML;
        let id = comment_list[i].id.replace('comment-','');
        comment_list[i].querySelector(".author").innerHTML = html+`</br><a title="收藏" href="javascript:;" class="addfavorite" data-id="`+id+`">[收藏]</a>`;
        let link =comment_list[i].querySelector('.righttext').children[0].getAttribute('href');
        comment_list[i].querySelector('.addfavorite').onclick = function (){
            love(link);
        };
    };

    let footer = document.querySelector('#footer');
    let html = footer.innerHTML;
    footer.innerHTML = html + `<br><a class="loveexport" href="javascript:;">导出收藏</a>  ·  <a class="loveclear" href="javascript:;">清空收藏</a>`;

    //更新收藏数
    updatestatus();


    footer.querySelector(".loveexport").onclick = function(){
        loveexport();
    }
    footer.querySelector(".loveclear").onclick = function(){
        loveclear();
        updatestatus();
    }


    function love(msg) {
        let url = 'https://jandan.net'+msg;
        list.push(url)
        list = unique(list);
        saveurl(list);
    };

    //去重
    function unique(arr){
        var x = new Set(arr);
        return [...x];
    }

    //保存到localStorage
    function saveurl(list){
        let tmp = [];
        if(JSON.parse(localStorage.getItem('MyLoveUrl'))){
            tmp = JSON.parse(localStorage.getItem('MyLoveUrl'));
        }
        //console.log(typeof (tmp));
        for (let i in list) {
            tmp.push(list[i])
        }
        tmp=unique(tmp)
        localStorage.setItem('MyLoveUrl',JSON.stringify(tmp));
        updatestatus();
    }

    //更新收藏数
    function updatestatus(){
         let len =0;
        if(JSON.parse(localStorage.getItem('MyLoveUrl'))){
            len = (JSON.parse(localStorage.getItem('MyLoveUrl'))).length;
        }else{
            len = 0;
        }
        document.querySelector('#footer').querySelector(".loveexport").innerHTML=`导出收藏[${len}]`;
    }
    //从localStorage导出
    function loveexport(){
        let flag = confirm("导出收藏");
        if(flag){
            if(JSON.parse(localStorage.getItem('MyLoveUrl'))){
                let data = (JSON.parse(localStorage.getItem('MyLoveUrl')));
                let csvContent = "data:text/csv;charset=utf-8,";
                for (let i in data) {
                    let row = data[i]+",";
                    csvContent += row + "\r\n";
                };
                var encodedUri = encodeURI(csvContent);
                window.open(encodedUri);
                var link = document.createElement("a");
                link.setAttribute("href", encodedUri);
                link.setAttribute("download", "JandanFavorite.csv");
                document.body.appendChild(link); // Required for FF
                link.click();
                document.body.removeChild(link);
                console.log(csvContent);
            }
        }
    }

    //清空localStorage
    function loveclear(){
        let flag = confirm("确定清空收藏？");
        if(flag){
             localStorage.clear();
        }
    }

})();