MediaWiki:TierListMaker.js

(function() {
    'use strict';
    
    // 仅在 TierListMaker 页面运行
    if (mw.config.get('wgPageName') !== '节奏榜') {
        return;
    }
    
    // 等待页面加载完成
    $(function() {
        initTierListMaker();
    });
    
    function initTierListMaker() {
        // 添加控制按钮
        addControlButtons();
        
        // 初始化拖拽功能
        initDragAndDrop();
        
        // 添加样式
        addCustomStyles();
        
        // 检查URL中是否有ID参数
        checkAndLoadFromURL();
    }
    
    function addControlButtons() {
        var $buttonContainer = $('<div>')
            .attr('id', 'tier-list-controls')
            .css({
                'margin': '10px 0',
                'padding': '10px',
                'background': '#f0f0f0',
                'border-radius': '5px'
            });
        
        var $saveButton = $('<button>')
            .text('保存为PNG')
            .addClass('tier-list-save-btn')
            .click(saveTierListAsPNG);
        
        var $clearButton = $('<button>')
            .text('清空所有')
            .addClass('tier-list-clear-btn')
            .click(clearAllTiers);
        
        var $resetButton = $('<button>')
            .text('重置')
            .addClass('tier-list-reset-btn')
            .click(function() {
                location.reload();
            });
        
        var $saveListButton = $('<button>')
            .text('保存榜单')
            .addClass('tier-list-save-list-btn')
            .click(saveTierListData);
        
        var $loadListButton = $('<button>')
            .text('加载榜单')
            .addClass('tier-list-load-list-btn')
            .click(showLoadDialog);
        
        var $shareButton = $('<button>')
            .text('分享榜单')
            .addClass('tier-list-share-btn')
            .click(shareTierList);
        
        $buttonContainer.append(
            $saveButton, ' ', 
            $saveListButton, ' ',
            $loadListButton, ' ',
            $shareButton, ' ',
            $clearButton, ' ', 
            $resetButton
        );
        
        $('.wikitable').before($buttonContainer);
    }
    
    function addCustomStyles() {
        var styles = `
            <style>
                .tier-list-save-btn, .tier-list-clear-btn, .tier-list-reset-btn,
                .tier-list-save-list-btn, .tier-list-load-list-btn, .tier-list-share-btn {
                    padding: 8px 16px;
                    margin: 0 5px;
                    font-size: 14px;
                    font-weight: bold;
                    border: none;
                    border-radius: 4px;
                    cursor: pointer;
                    transition: all 0.3s;
                }
                
                .tier-list-save-btn {
                    background: #4CAF50;
                    color: white;
                }
                
                .tier-list-save-btn:hover {
                    background: #45a049;
                }
                
                .tier-list-clear-btn {
                    background: #f44336;
                    color: white;
                }
                
                .tier-list-clear-btn:hover {
                    background: #da190b;
                }
                
                .tier-list-reset-btn {
                    background: #2196F3;
                    color: white;
                }
                
                .tier-list-reset-btn:hover {
                    background: #0b7dda;
                }
                
                .tier-list-save-list-btn {
                    background: #FF9800;
                    color: white;
                }
                
                .tier-list-save-list-btn:hover {
                    background: #e68900;
                }
                
                .tier-list-load-list-btn {
                    background: #9C27B0;
                    color: white;
                }
                
                .tier-list-load-list-btn:hover {
                    background: #7B1FA2;
                }
                
                .tier-list-share-btn {
                    background: #00BCD4;
                    color: white;
                }
                
                .tier-list-share-btn:hover {
                    background: #0097A7;
                }
                
                .wikitable td {
                    min-height: 120px;
                    min-width: 300px;
                    padding: 10px;
                    vertical-align: top;
                    position: relative;
                }
                
                .tier-row-drop-zone {
                    border: 2px dashed transparent;
                    transition: all 0.3s;
                }
                
                .tier-row-drop-zone.drag-over {
                    border-color: #2196F3;
                    background-color: rgba(33, 150, 243, 0.1);
                }
                
                .avatar-frame {
                    cursor: move;
                    transition: transform 0.2s, opacity 0.2s;
                    user-select: none;
                }
                
                .avatar-frame:hover {
                    transform: scale(1.05);
                }
                
                .avatar-frame.dragging {
                    opacity: 0.5;
                }
                
                .avatar-frame.in-tier {
                    margin: 5px;
                }
                
                #avatar-pool {
                    border: 2px solid #ddd;
                    padding: 10px;
                    margin: 10px 0;
                    border-radius: 5px;
                    background: #fafafa;
                    min-height: 150px;
                }
                
                #avatar-pool-title {
                    font-size: 16px;
                    font-weight: bold;
                    margin-bottom: 10px;
                    color: #333;
                }
                
                .tier-dialog-overlay {
                    position: fixed;
                    top: 0;
                    left: 0;
                    right: 0;
                    bottom: 0;
                    background: rgba(0, 0, 0, 0.5);
                    z-index: 9998;
                    display: flex;
                    align-items: center;
                    justify-content: center;
                }
                
                .tier-dialog {
                    background: white;
                    padding: 30px;
                    border-radius: 10px;
                    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
                    max-width: 500px;
                    width: 90%;
                    z-index: 9999;
                }
                
                .tier-dialog h3 {
                    margin-top: 0;
                    margin-bottom: 20px;
                    color: #333;
                }
                
                .tier-dialog label {
                    display: block;
                    margin-bottom: 8px;
                    font-weight: bold;
                    color: #555;
                }
                
                .tier-dialog input[type="text"] {
                    width: 100%;
                    padding: 10px;
                    border: 2px solid #ddd;
                    border-radius: 5px;
                    font-size: 14px;
                    box-sizing: border-box;
                    margin-bottom: 15px;
                }
                
                .tier-dialog input[type="text"]:focus {
                    outline: none;
                    border-color: #2196F3;
                }
                
                .tier-dialog-buttons {
                    display: flex;
                    justify-content: flex-end;
                    gap: 10px;
                    margin-top: 20px;
                }
                
                .tier-dialog-btn {
                    padding: 10px 20px;
                    border: none;
                    border-radius: 5px;
                    font-size: 14px;
                    font-weight: bold;
                    cursor: pointer;
                    transition: all 0.3s;
                }
                
                .tier-dialog-btn-primary {
                    background: #2196F3;
                    color: white;
                }
                
                .tier-dialog-btn-primary:hover {
                    background: #0b7dda;
                }
                
                .tier-dialog-btn-secondary {
                    background: #ddd;
                    color: #333;
                }
                
                .tier-dialog-btn-secondary:hover {
                    background: #ccc;
                }
                
                .tier-id-display {
                    background: #f0f8ff;
                    padding: 15px;
                    border-radius: 5px;
                    border: 2px solid #2196F3;
                    margin: 15px 0;
                    word-break: break-all;
                }
                
                .tier-id-label {
                    font-weight: bold;
                    color: #2196F3;
                    margin-bottom: 5px;
                }
                
                .tier-id-value {
                    font-family: 'Courier New', monospace;
                    font-size: 16px;
                    color: #333;
                    user-select: all;
                }
                
                .tier-url-display {
                    background: #f0f8ff;
                    padding: 15px;
                    border-radius: 5px;
                    border: 2px solid #00BCD4;
                    margin: 15px 0;
                    word-break: break-all;
                }
                
                .copy-btn {
                    background: #4CAF50;
                    color: white;
                    padding: 5px 15px;
                    border: none;
                    border-radius: 3px;
                    cursor: pointer;
                    font-size: 12px;
                    margin-left: 10px;
                }
                
                .copy-btn:hover {
                    background: #45a049;
                }
                
                .success-message {
                    color: #4CAF50;
                    font-weight: bold;
                    margin-top: 10px;
                }
            </style>
        `;
        $('head').append(styles);
    }
    
    function initDragAndDrop() {
        // 创建头像池容器
        var $avatarPool = $('<div>')
            .attr('id', 'avatar-pool')
            .addClass('tier-row-drop-zone');
        
        var $poolTitle = $('<div>')
            .attr('id', 'avatar-pool-title')
            .text('角色池（拖动到上方表格）');
        
        $avatarPool.append($poolTitle);
        
        // 将所有头像移动到头像池
        var $avatars = $('.avatar-frame');
        $avatars.each(function() {
            $(this).addClass('avatar-item').appendTo($avatarPool);
        });
        
        $('.wikitable').after($avatarPool);
        
        // 为表格单元格添加drop-zone类
        $('.wikitable td').addClass('tier-row-drop-zone');
        
        // 初始化所有头像的拖拽
        initAvatarDrag();
        
        // 初始化所有drop zone
        initDropZones();
    }
    
    function initAvatarDrag() {
        $('.avatar-frame').each(function() {
            var $avatar = $(this);
            
            $avatar.attr('draggable', 'true');
            
            $avatar.on('dragstart', function(e) {
                $(this).addClass('dragging');
                e.originalEvent.dataTransfer.effectAllowed = 'move';
                e.originalEvent.dataTransfer.setData('text/html', this.outerHTML);
            });
            
            $avatar.on('dragend', function(e) {
                $(this).removeClass('dragging');
            });
        });
    }
    
    function initDropZones() {
        $('.tier-row-drop-zone').each(function() {
            var $zone = $(this);
            
            $zone.on('dragover', function(e) {
                e.preventDefault();
                e.originalEvent.dataTransfer.dropEffect = 'move';
                $(this).addClass('drag-over');
            });
            
            $zone.on('dragleave', function(e) {
                $(this).removeClass('drag-over');
            });
            
            $zone.on('drop', function(e) {
                e.preventDefault();
                $(this).removeClass('drag-over');
                
                var $dragging = $('.avatar-frame.dragging');
                
                if ($dragging.length) {
                    // 移动现有元素
                    $dragging.removeClass('dragging');
                    
                    // 如果是在tier中，添加样式
                    if ($(this).hasClass('wikitable')) {
                        $dragging.addClass('in-tier');
                    } else if ($(this).attr('id') === 'avatar-pool') {
                        $dragging.removeClass('in-tier');
                    } else {
                        $dragging.addClass('in-tier');
                    }
                    
                    $(this).append($dragging);
                }
            });
        });
    }
    
    function clearAllTiers() {
        if (!confirm('确定要清空所有分级吗？')) {
            return;
        }
        
        // 将所有tier中的头像移回头像池
        $('.wikitable td .avatar-frame').each(function() {
            $(this).removeClass('in-tier');
            $('#avatar-pool').append($(this));
        });
    }
    
    // 保存榜单数据
    function saveTierListData() {
        var tierData = collectTierData();
        
        if (tierData.tiers.length === 0 && tierData.pool.length === $('.avatar-frame').length) {
            alert('您还没有放置任何角色到榜单中！');
            return;
        }
        
        var listId = generateUniqueId();
        var timestamp = new Date().toISOString();
        
        var saveData = {
            id: listId,
            timestamp: timestamp,
            data: tierData
        };
        
        // 保存到 localStorage
        localStorage.setItem('tierlist_' + listId, JSON.stringify(saveData));
        
        // 显示保存成功对话框
        showSaveSuccessDialog(listId);
    }
    
    // 收集榜单数据
    function collectTierData() {
        var data = {
            tiers: [],
            pool: []
        };
        
        // 收集表格中的数据
        $('.wikitable tr').each(function(rowIndex) {
            var $cells = $(this).find('td');
            if ($cells.length > 0) {
                var tierName = $cells.eq(0).text().trim();
                var avatars = [];
                
                $cells.eq(1).find('.avatar-frame').each(function() {
                    var avatarId = getAvatarIdentifier($(this));
                    if (avatarId) {
                        avatars.push(avatarId);
                    }
                });
                
                if (avatars.length > 0) {
                    data.tiers.push({
                        name: tierName,
                        avatars: avatars
                    });
                }
            }
        });
        
        // 收集头像池中的数据
        $('#avatar-pool .avatar-frame').each(function() {
            var avatarId = getAvatarIdentifier($(this));
            if (avatarId) {
                data.pool.push(avatarId);
            }
        });
        
        return data;
    }
    
    // 获取头像的唯一标识符
    function getAvatarIdentifier($avatar) {
        // 尝试多种方式获取头像标识
        var identifier = null;
        
        // 方法1: 通过图片src
        var $img = $avatar.find('img');
        if ($img.length > 0) {
            identifier = $img.attr('src');
        }
        
        // 方法2: 通过data属性
        if (!identifier && $avatar.attr('data-avatar-id')) {
            identifier = $avatar.attr('data-avatar-id');
        }
        
        // 方法3: 通过alt或title
        if (!identifier && $img.attr('alt')) {
            identifier = $img.attr('alt');
        }
        
        // 方法4: 通过完整HTML（作为后备）
        if (!identifier) {
            identifier = $avatar.prop('outerHTML');
        }
        
        return identifier;
    }
    
    // 生成唯一ID
    function generateUniqueId() {
        var timestamp = Date.now().toString(36);
        var randomStr = Math.random().toString(36).substr(2, 9);
        return timestamp + randomStr;
    }
    
    // 显示保存成功对话框
    function showSaveSuccessDialog(listId) {
        var shareUrl = window.location.href.split('?')[0] + '?tierid=' + listId;
        
        var $overlay = $('<div>').addClass('tier-dialog-overlay');
        var $dialog = $('<div>').addClass('tier-dialog');
        
        var $title = $('<h3>').text('榜单保存成功！');
        
        var $idDisplay = $('<div>').addClass('tier-id-display');
        var $idLabel = $('<div>').addClass('tier-id-label').text('榜单ID：');
        var $idValue = $('<div>').addClass('tier-id-value').text(listId);
        var $copyIdBtn = $('<button>').addClass('copy-btn').text('复制ID')
            .click(function() {
                copyToClipboard(listId);
                $(this).text('已复制！').css('background', '#4CAF50');
                setTimeout(() => {
                    $(this).text('复制ID').css('background', '');
                }, 2000);
            });
        
        $idDisplay.append($idLabel, $idValue, $copyIdBtn);
        
        var $urlDisplay = $('<div>').addClass('tier-url-display');
        var $urlLabel = $('<div>').addClass('tier-id-label').text('分享链接：');
        var $urlValue = $('<div>').addClass('tier-id-value').text(shareUrl);
        var $copyUrlBtn = $('<button>').addClass('copy-btn').text('复制链接')
            .click(function() {
                copyToClipboard(shareUrl);
                $(this).text('已复制！').css('background', '#4CAF50');
                setTimeout(() => {
                    $(this).text('复制链接').css('background', '');
                }, 2000);
            });
        
        $urlDisplay.append($urlLabel, $urlValue, $copyUrlBtn);
        
        var $info = $('<p>').css({'color': '#666', 'margin': '15px 0'})
            .text('保存的榜单将在本地存储，您可以通过ID或链接访问。');
        
        var $buttons = $('<div>').addClass('tier-dialog-buttons');
        var $closeBtn = $('<button>')
            .addClass('tier-dialog-btn tier-dialog-btn-primary')
            .text('关闭')
            .click(function() {
                $overlay.remove();
            });
        
        $buttons.append($closeBtn);
        $dialog.append($title, $idDisplay, $urlDisplay, $info, $buttons);
        $overlay.append($dialog);
        $('body').append($overlay);
    }
    
    // 显示加载对话框
    function showLoadDialog() {
        var $overlay = $('<div>').addClass('tier-dialog-overlay');
        var $dialog = $('<div>').addClass('tier-dialog');
        
        var $title = $('<h3>').text('加载榜单');
        
        var $label = $('<label>').text('请输入榜单ID：');
        var $input = $('<input>')
            .attr('type', 'text')
            .attr('placeholder', '输入榜单ID')
            .attr('id', 'tier-id-input');
        
        var $errorMsg = $('<div>')
            .css({'color': '#f44336', 'margin-top': '10px', 'display': 'none'})
            .attr('id', 'load-error-msg');
        
        var $buttons = $('<div>').addClass('tier-dialog-buttons');
        var $loadBtn = $('<button>')
            .addClass('tier-dialog-btn tier-dialog-btn-primary')
            .text('加载')
            .click(function() {
                var listId = $input.val().trim();
                if (!listId) {
                    $errorMsg.text('请输入榜单ID！').show();
                    return;
                }
                
                if (loadTierListData(listId)) {
                    $overlay.remove();
                } else {
                    $errorMsg.text('未找到该榜单，请检查ID是否正确！').show();
                }
            });
        
        var $cancelBtn = $('<button>')
            .addClass('tier-dialog-btn tier-dialog-btn-secondary')
            .text('取消')
            .click(function() {
                $overlay.remove();
            });
        
        $buttons.append($cancelBtn, $loadBtn);
        $dialog.append($title, $label, $input, $errorMsg, $buttons);
        $overlay.append($dialog);
        $('body').append($overlay);
        
        // 聚焦输入框
        setTimeout(() => $input.focus(), 100);
        
        // 支持回车键加载
        $input.on('keypress', function(e) {
            if (e.which === 13) {
                $loadBtn.click();
            }
        });
    }
    
    // 加载榜单数据
    function loadTierListData(listId) {
        var savedData = localStorage.getItem('tierlist_' + listId);
        
        if (!savedData) {
            return false;
        }
        
        try {
            var saveData = JSON.parse(savedData);
            applyTierData(saveData.data);
            
            // 显示加载成功提示
            showNotification('榜单加载成功！', 'success');
            
            return true;
        } catch (e) {
            console.error('加载榜单失败:', e);
            return false;
        }
    }
    
    // 应用榜单数据
    function applyTierData(tierData) {
        // 首先清空所有层级
        $('.wikitable td .avatar-frame').each(function() {
            $(this).removeClass('in-tier');
            $('#avatar-pool').append($(this));
        });
        
        // 应用tier数据
        tierData.tiers.forEach(function(tier) {
            var $targetCell = null;
            
            // 查找对应的tier单元格
            $('.wikitable tr').each(function() {
                var $cells = $(this).find('td');
                if ($cells.length > 0) {
                    var tierName = $cells.eq(0).text().trim();
                    if (tierName === tier.name) {
                        $targetCell = $cells.eq(1);
                        return false;
                    }
                }
            });
            
            if ($targetCell) {
                tier.avatars.forEach(function(avatarId) {
                    var $avatar = findAvatarByIdentifier(avatarId);
                    if ($avatar) {
                        $avatar.addClass('in-tier');
                        $targetCell.append($avatar);
                    }
                });
            }
        });
    }
    
    // 根据标识符查找头像
    function findAvatarByIdentifier(identifier) {
        var $found = null;
        
        $('.avatar-frame').each(function() {
            var $avatar = $(this);
            var currentId = getAvatarIdentifier($avatar);
            
            if (currentId === identifier) {
                $found = $avatar;
                return false;
            }
        });
        
        return $found;
    }
    
    // 分享榜单
    function shareTierList() {
        var tierData = collectTierData();
        
        if (tierData.tiers.length === 0 && tierData.pool.length === $('.avatar-frame').length) {
            alert('您还没有放置任何角色到榜单中！');
            return;
        }
        
        // 检查是否已经保存
        var currentUrl = window.location.href;
        var urlParams = new URLSearchParams(window.location.search);
        var existingId = urlParams.get('tierid');
        
        if (existingId) {
            // 已有ID，直接分享
            var shareUrl = window.location.href.split('?')[0] + '?tierid=' + existingId;
            showShareDialog(shareUrl, existingId);
        } else {
            // 先保存再分享
            var listId = generateUniqueId();
            var timestamp = new Date().toISOString();
            
            var saveData = {
                id: listId,
                timestamp: timestamp,
                data: tierData
            };
            
            localStorage.setItem('tierlist_' + listId, JSON.stringify(saveData));
            
            var shareUrl = window.location.href.split('?')[0] + '?tierid=' + listId;
            showShareDialog(shareUrl, listId);
        }
    }
    
    // 显示分享对话框
    function showShareDialog(shareUrl, listId) {
        var $overlay = $('<div>').addClass('tier-dialog-overlay');
        var $dialog = $('<div>').addClass('tier-dialog');
        
        var $title = $('<h3>').text('分享榜单');
        
        var $urlDisplay = $('<div>').addClass('tier-url-display');
        var $urlLabel = $('<div>').addClass('tier-id-label').text('分享链接：');
        var $urlValue = $('<div>').addClass('tier-id-value').text(shareUrl);
        var $copyUrlBtn = $('<button>').addClass('copy-btn').text('复制链接')
            .click(function() {
                copyToClipboard(shareUrl);
                $(this).text('已复制！').css('background', '#4CAF50');
                setTimeout(() => {
                    $(this).text('复制链接').css('background', '');
                }, 2000);
            });
        
        $urlDisplay.append($urlLabel, $urlValue, $copyUrlBtn);
        
        var $idDisplay = $('<div>').addClass('tier-id-display');
        var $idLabel = $('<div>').addClass('tier-id-label').text('榜单ID：');
        var $idValue = $('<div>').addClass('tier-id-value').text(listId);
        var $copyIdBtn = $('<button>').addClass('copy-btn').text('复制ID')
            .click(function() {
                copyToClipboard(listId);
                $(this).text('已复制！').css('background', '#4CAF50');
                setTimeout(() => {
                    $(this).text('复制ID').css('background', '');
                }, 2000);
            });
        
        $idDisplay.append($idLabel, $idValue, $copyIdBtn);
        
        var $info = $('<p>').css({'color': '#666', 'margin': '15px 0'})
            .text('将此链接分享给其他人，他们可以查看您的榜单！');
        
        var $buttons = $('<div>').addClass('tier-dialog-buttons');
        var $closeBtn = $('<button>')
            .addClass('tier-dialog-btn tier-dialog-btn-primary')
            .text('关闭')
            .click(function() {
                $overlay.remove();
            });
        
        $buttons.append($closeBtn);
        $dialog.append($title, $urlDisplay, $idDisplay, $info, $buttons);
        $overlay.append($dialog);
        $('body').append($overlay);
    }
    
    // 检查URL并加载榜单
    function checkAndLoadFromURL() {
        var urlParams = new URLSearchParams(window.location.search);
        var tierid = urlParams.get('tierid');
        
        if (tierid) {
            setTimeout(function() {
                if (loadTierListData(tierid)) {
                    showNotification('已加载分享的榜单！ID: ' + tierid, 'success');
                } else {
                    showNotification('无法加载榜单，ID可能无效或已过期', 'error');
                }
            }, 500);
        }
    }
    
    // 复制到剪贴板
    function copyToClipboard(text) {
        if (navigator.clipboard && navigator.clipboard.writeText) {
            navigator.clipboard.writeText(text);
        } else {
            // 后备方案
            var $temp = $('<textarea>');
            $('body').append($temp);
            $temp.val(text).select();
            document.execCommand('copy');
            $temp.remove();
        }
    }
    
    // 显示通知
    function showNotification(message, type) {
        var bgColor = type === 'success' ? '#4CAF50' : '#f44336';
        
        var $notification = $('<div>')
            .css({
                'position': 'fixed',
                'top': '20px',
                'right': '20px',
                'background': bgColor,
                'color': 'white',
                'padding': '15px 25px',
                'border-radius': '5px',
                'box-shadow': '0 4px 12px rgba(0,0,0,0.3)',
                'z-index': 10000,
                'font-size': '14px',
                'font-weight': 'bold',
                'animation': 'slideIn 0.3s ease-out'
            })
            .text(message);
        
        $('body').append($notification);
        
        setTimeout(function() {
            $notification.fadeOut(300, function() {
                $(this).remove();
            });
        }, 3000);
    }
    
    function saveTierListAsPNG() {
        // 检查是否已加载html2canvas库
        if (typeof html2canvas === 'undefined') {
            loadHtml2Canvas(function() {
                captureTierList();
            });
        } else {
            captureTierList();
        }
    }
    
    function loadHtml2Canvas(callback) {
        mw.loader.using('jquery', function() {
            $.getScript('https://cdn.jsdelivr.net/npm/html2canvas@1.4.1/dist/html2canvas.min.js')
                .done(function() {
                    callback();
                })
                .fail(function() {
                    alert('加载截图库失败，请检查网络连接');
                });
        });
    }
    
    function captureTierList() {
        var $table = $('.wikitable');
        
        if ($table.length === 0) {
            alert('未找到表格');
            return;
        }
        
        // 显示加载提示
        var $loading = $('<div>')
            .css({
                'position': 'fixed',
                'top': '50%',
                'left': '50%',
                'transform': 'translate(-50%, -50%)',
                'background': 'rgba(0,0,0,0.8)',
                'color': 'white',
                'padding': '20px 40px',
                'border-radius': '10px',
                'z-index': 9999,
                'font-size': '18px'
            })
            .text('正在生成图片...')
            .appendTo('body');
        
        html2canvas($table[0], {
            backgroundColor: '#ffffff',
            scale: 2,
            logging: false,
            useCORS: true,
            allowTaint: true
        }).then(function(canvas) {
            $loading.remove();
            
            // 转换为blob并下载
            canvas.toBlob(function(blob) {
                var url = URL.createObjectURL(blob);
                var link = document.createElement('a');
                var timestamp = new Date().toISOString().slice(0,19).replace(/:/g,'-');
                link.download = 'tier-list-' + timestamp + '.png';
                link.href = url;
                link.click();
                URL.revokeObjectURL(url);
            });
        }).catch(function(error) {
            $loading.remove();
            console.error('截图失败:', error);
            alert('生成图片失败，请重试');
        });
    }
    
})();