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<?php
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class UOJBlogEditor {
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public $type = 'blog';
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public $name;
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public $blog_url;
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public $save;
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public $cur_data = array();
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public $post_data = array();
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public $label_text = array(
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'title' => '标题',
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'tags' => '标签（多个标签用逗号隔开）',
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'content' => '内容',
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'view blog' => '查看博客',
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'blog visibility' => '博客可见性',
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'private' => '未公开',
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'public' => '公开'
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);
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public $validator = array();
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function __construct() {
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global $REQUIRE_LIB;
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$REQUIRE_LIB['blog-editor'] = '';
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$this->validator = array(
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'title' => function(&$title) {
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if ($title == '') {
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return '标题不能为空';
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}
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if (strlen($title) > 100) {
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return '标题不能超过 100 个字节';
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}
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if (HTML::escape($title) === '') {
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return '无效编码';
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}
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return '';
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},
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'content_md' => function(&$content_md) {
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if (strlen($content_md) > 1000000) {
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return '内容过长';
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}
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return '';
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},
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'tags' => function(&$tags) {
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$tags = str_replace('，', ',', $tags);
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$tags_raw = explode(',', $tags);
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if (count($tags_raw) > 10) {
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return '标签个数不能超过10';
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}
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$tags = array();
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foreach ($tags_raw as $tag) {
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$tag = trim($tag);
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if (strlen($tag) == 0) {
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continue;
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}
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if (strlen($tag) > 30) {
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return '标签 “' . HTML::escape($tag) .'” 太长';
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}
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if (in_array($tag, $tags, true)) {
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return '标签 “' . HTML::escape($tag) .'” 重复出现';
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}
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$tags[] = $tag;
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}
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return '';
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}
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);
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}
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public function validate($name) {
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if (!isset($_POST["{$this->name}_{$name}"])) {
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return '不能为空';
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}
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$this->post_data[$name] = $_POST["{$this->name}_{$name}"];
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$val = $this->validator[$name];
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return $val($this->post_data[$name]);
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}
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private function receivePostData() {
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$errors = array();
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foreach (array('title', 'content_md', 'tags') as $name) {
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$cur_err = $this->validate($name);
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if ($cur_err) {
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$errors[$name] = $cur_err;
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}
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}
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if ($errors) {
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die(json_encode($errors));
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}
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crsf_defend();
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$this->post_data['is_hidden'] = isset($_POST["{$this->name}_is_hidden"]) ? 1 : 0;
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$purifier = HTML::pruifier();
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$this->post_data['title'] = HTML::escape($this->post_data['title']);
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if ($this->type == 'blog') {
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$content_md = $_POST[$this->name . '_content_md'];
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try {
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$v8 = new V8Js('POST');
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$v8->content_md = $this->post_data['content_md'];
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$v8->executeString(file_get_contents($_SERVER['DOCUMENT_ROOT'] . '/js/marked.js'), 'marked.js');
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$this->post_data['content'] = $v8->executeString('marked(POST.content_md)');
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} catch (V8JsException $e) {
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die(json_encode(array('content_md' => '未知错误')));
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}
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if (preg_match('/^.*<!--.*readmore.*-->.*$/m', $this->post_data['content'], $matches, PREG_OFFSET_CAPTURE)) {
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$content_less = substr($this->post_data['content'], 0, $matches[0][1]);
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$content_more = substr($this->post_data['content'], $matches[0][1] + strlen($matches[0][0]));
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$this->post_data['content'] = $purifier->purify($content_less).'<!-- readmore -->'.$purifier->purify($content_more);
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} else {
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$this->post_data['content'] = $purifier->purify($this->post_data['content']);
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}
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} elseif ($this->type == 'slide') {
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$content_array = yaml_parse($this->post_data['content_md']);
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if ($content_array === false || !is_array($content_array)) {
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die(json_encode(array('content_md' => '不合法的 YAML 格式')));
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}
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try {
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$v8 = new V8Js('PHP');
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$v8->executeString(file_get_contents($_SERVER['DOCUMENT_ROOT'] . '/js/marked.js'), 'marked.js');
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$v8->executeString(<<<EOD
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marked.setOptions({
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getLangClass: function(lang) {
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lang = lang.toLowerCase();
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switch (lang) {
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case 'c': return 'c';
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case 'c++': return 'cpp';
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case 'pascal': return 'pascal';
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default: return lang;
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}
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},
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getElementClass: function(tok) {
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switch (tok.type) {
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case 'list_item_start':
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return 'fragment';
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case 'loose_item_start':
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return 'fragment';
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default:
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return null;
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}
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}
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})
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EOD
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);
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} catch (V8JsException $e) {
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die(json_encode(array('content_md' => '未知错误')));
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}
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$marked = function($md) use ($v8, $purifier) {
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try {
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$v8->md = $md;
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return $purifier->purify($v8->executeString('marked(PHP.md)'));
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} catch (V8JsException $e) {
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die(json_encode(array('content_md' => '未知错误')));
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}
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};
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$config = array();
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$this->post_data['content'] = '';
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foreach ($content_array as $slide_name => $slide_content) {
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if (is_array($slide_content) && is_array($slide_content['config'])) {
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foreach (array('theme') as $config_key) {
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if (is_string($slide_content['config'][$config_key]) && strlen($slide_content['config'][$config_key]) <= 30) {
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$config[$config_key] = $slide_content['config'][$config_key];
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}
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}
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continue;
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}
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$this->post_data['content'] .= '<section>';
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if (is_string($slide_content)) {
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$this->post_data['content'] .= $marked($slide_content);
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} elseif (is_array($slide_content)) {
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if (is_array($slide_content['children'])) {
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foreach ($slide_content['children'] as $cslide_name => $cslide_content) {
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$this->post_data['content'] .= '<section>';
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$this->post_data['content'] .= $marked($cslide_content);
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$this->post_data['content'] .= '</section>';
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}
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}
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}
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$this->post_data['content'] .= "</section>\n";
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}
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$this->post_data['content'] = json_encode($config) . "\n" . $this->post_data['content'];
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}
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}
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public function handleSave() {
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$save = $this->save;
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$this->receivePostData();
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$ret = $save($this->post_data);
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if (!$ret) {
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$ret = array();
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}
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if (isset($_POST['need_preview'])) {
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ob_start();
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if ($this->type == 'blog') {
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echoUOJPageHeader('博客预览', array('ShowPageHeader' => false, 'REQUIRE_LIB' => array('mathjax' => '', 'shjs' => '')));
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echo '<article>';
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echo $this->post_data['content'];
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echo '</article>';
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echoUOJPageFooter(array('ShowPageFooter' => false));
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} elseif ($this->type == 'slide') {
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uojIncludeView('slide', array_merge(
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UOJContext::pageConfig(),
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array(
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'PageTitle' => '幻灯片预览',
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'content' => $this->post_data['content']
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)
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));
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}
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$ret['html'] = ob_get_contents();
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ob_end_clean();
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}
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die(json_encode($ret));
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}
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public function runAtServer() {
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if (isset($_POST["save-{$this->name}"])) {
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$this->handleSave();
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}
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}
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public function printHTML() {
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uojIncludeView('blog-editor', array('editor' => $this));
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}
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}
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