RetireJapan

Code: Select all

class Mercari {
    constructor() {
        this.items = {};
        this.finished = false;
        this.page = $("body");
        this.page_number = 1;
        this.load_page();
    }

    static order = [
        "商品",
        "商品ID",
        "商品金額",
        "販売手数料",
        "配送料",
        "販売利益",
        "購入日時"
    ];

    load_page() {
        if(!this.are_there_more_items()) {
            console.log("Extraction complete - no more items on this page exist.");
            this.all_items_loaded();
        } else {
            console.log("Extracting items on page " + this.page_number);
            this.load_items_on_page();
        }
        return null;
    }

    are_there_more_items() {
        return !this.page.find("li.mypage-item-not-found.bold").length;
    }

    load_items_on_page() {
        var item_links = this.page.find("#mypage-tab-transaction-old li.js-mypage-item a.mypage-item-link.has-button");
        var no_of_items = item_links.length;
        var item_link, url, timestamp;
        var that = this;
        var items_on_this_page = {};
        
        for(var i = 0; i < no_of_items; i++) {
            item_link = item_links.eq(i);
            url = item_link.attr("href");
            timestamp = item_link.parent().data("timestamp");
            
            $.get(url, (function(timestamp) {
                return function(data) {
                    items_on_this_page[timestamp] = that.get_item_data($(data));
                    var loaded_items = Object.keys(items_on_this_page).length;
                    if(loaded_items == no_of_items) {
                        console.log("-> Loaded all items on this page");
                        that.items = $.extend(that.items, items_on_this_page);
                        that.get_next_page();
                    } else {
                        console.log("-> Loaded item #" + loaded_items + "/" + no_of_items);
                    }
                };
            })(timestamp));
        }
    }

    get_next_page() {
        this.page_number += 1;
        var next_page_button = this.page.find("ul.mypage-history.pager li.pager-next.pager-cell a");
        if(next_page_button.length) {
            var that = this;
            var href = next_page_button.first().attr("href");
            console.log("Loading page " + this.page_number);
            $.get(href, function(data) {
                console.log("-> Page loaded");
                that.page = $(data);
                that.load_page();
            });
        } else {
            console.log("Extraction process complete - no more pages");
            this.all_items_loaded();
        }
    }

    get_item_data(data) {
        var item = {};
        data.find("ul.transact-info-table > li").each(function(){
            var that = $(this);
            var header = that.find("span").first().text().trim();
            var content = that.find("ul li");
            var text;
        
            switch(header) {
                case "商品":
                    text = content.find("div.transact-info-item.bold").first().html().split("<br>")[0].trim();
                    break;
                case "送料":
                    return;
                case "販売手数料":
                case "配送料":
                case "販売利益":
                    text = +(Mercari.to_raw_num(content.first().text().trim()));
                    break;
                case "購入日時":
                case "商品ID":
                    text = content.first().text().trim();
                    break;
                default:
                    console.log("Error " + header);
                    return;
            }
        
            item[header] = text;
        
        });
        
        item["商品金額"] = item["販売利益"] + item["配送料"] + item["販売手数料"];

        var ordered_item = [];
        for(var order_id in Mercari.order) {
            ordered_item.push(item[Mercari.order[order_id]]);
        }

        return ordered_item;
    }

    static to_raw_num(price) {
        price = price.replace("¥", "");
        price = price.replace(/,/g, "");
        return price;
    }

    all_items_loaded() {
        if(this.finished) {
            throw Error("Already finished!");
        }
        // Ensure this code only gets run once.
        this.finished = true; 

        console.log(Object.keys(this.items).length + " items extracted.");

        // Put each item into tab format
        this.tab_items();

        // reorder items
        this.sort_items();

        // copy to clipboard
        Mercari.copy_to_clipboard(this.items.join("\r\n"));
        console.log("Items copied to clipboard.");
    }

    tab_items() {
        var tabbed_items = {};
        for(var item_id in this.items) {
            tabbed_items[item_id] = this.items[item_id].join("\t")
        }
        this.items = tabbed_items;
    }

    sort_items() {
        var keys = Object.keys(this.items).sort();
        var sorted_items = [];
        for(const key of keys){
            sorted_items.push(this.items[key]);
        }
        this.items = sorted_items;
    }

    static copy_to_clipboard(content) {
        var $temp = $("<textarea>");
        $("body").append($temp);
        $temp.val(content).select();
        document.execCommand("copy");
        $temp.remove();
    }
}

var mercari = new Mercari();