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修复markdown格式的文章中的链接识别效果，提取部分公共方法 #29

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修复markdown格式的文章中的链接识别效果，提取部分公共方法 #29

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234 changes: 212 additions & 22 deletions Plugin.php
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Original file line number Diff line number Diff line change
Expand Up @@ -196,6 +196,7 @@ public static function replace(string $text, $widget, $lastResult)
$text = empty($lastResult) ? $text : $lastResult;
$pluginOption = self::options('ShortLinks'); // 插件选项
$target = ($pluginOption->target) ? ' target="_blank" ' : ''; // 新窗口打开

if ($pluginOption->convert == 1) {
if ($widget->fields) {
$fields = unserialize($widget->fields);
Expand All @@ -204,11 +205,24 @@ public static function replace(string $text, $widget, $lastResult)
return $text;
}
}
// 文章内容和评论内容处理

// 文章内容和评论内容处理，默认只处理a标签
@preg_match_all('/<a(.*?)href="(?!#)(.*?)"(.*?)>/', $text, $matches);
if ($matches) {
foreach ($matches[2] as $link) {
$text = str_replace("href=\"$link\"", "href=\"" . self::convertLink($link) . "\"" . $target, $text);
if(self::isExternalLink($link) ) {
$text = str_replace("href=\"$link\"", "href=\"" . self::convertLink($link) . "\"" . $target, $text);
}

}
}

// 强力模式
if ($pluginOption->forceSwitch == 1)
{
// Markdown格式
if(strpos($text,'class="md_content"') !== false){
$text = self::convertExternalLinkToInternalLinkInMarkdown($text);
}
}
}
Expand All @@ -218,9 +232,9 @@ public static function replace(string $text, $widget, $lastResult)
/**
* 自定义字段处理
*
* @param Widget_Archive $widget
* @param Typecho_Db_Query $select
* @param mixed $lastResult
* @param Widget_Archive $widget
* @param Typecho_Db_Query $select
* @param mixed $lastResult
* @return void
* @throws \Typecho\Plugin\Exception
*/
Expand All @@ -233,17 +247,19 @@ public static function fieldsConvert($widget, $select, $lastResult)
if ($fieldsList) {
foreach ($fieldsList as $field) {
if (isset($text->fields[$field])) {
// 非强力模式转换 a 标签
@preg_match_all('/<a(.*?)href="(?!#)(.*?)"(.*?)>/', $widget->fields[$field], $matches);
if ($matches) {
foreach ($matches[2] as $link) {
$widget->fields[$field] = str_replace("href=\"$link\"", "href=\"" . self::convertLink($link) . "\"", $widget->fields[$field]);
if(self::isExternalLink($link)) {
// 非强力模式转换 a 标签
@preg_match_all('/<a(.*?)href="(?!#)(.*?)"(.*?)>/', $widget->fields[$field], $matches);
if ($matches) {
foreach ($matches[2] as $link) {

$widget->fields[$field] = str_replace("href=\"$link\"", "href=\"" . self::convertLink($link) . "\"", $widget->fields[$field]);
}
}
// 强力模式匹配所有链接
if ($pluginOption->forceSwitch == 1) {
$widget->fields[$field] = self::autoLink($widget->fields[$field]);
}
}

// 强力模式匹配所有链接
if ($pluginOption->forceSwitch == 1) {
$widget->fields[$field] = self::autoLink($widget->fields[$field]);
}
}
}
Expand Down Expand Up @@ -304,7 +320,7 @@ public static function convertLink($link, bool $check = true)
}

// 图片不处理
if (preg_match('/\.(jpg|jepg|png|ico|bmp|gif|tiff)/i', $link)) {
if (self::isImageUrl($link)) {
return $link;
}
}
Expand All @@ -314,9 +330,9 @@ public static function convertLink($link, bool $check = true)
/**
* 强力转换
*
* @param Array $value
* @param mixed $widget
* @param mixed $lastResult
* @param Array $value
* @param mixed $widget
* @param mixed $lastResult
* @return Array
* @throws \Typecho\Plugin\Exception
*/
Expand All @@ -333,13 +349,12 @@ public static function forceConvert(array $value, $widget, $lastResult): array
/**
* 文本链接转A标签
*
* @param string $content
* @param string $content
* @return string
* @throws \Typecho\Plugin\Exception
*/
public static function autoLink($content)
{

$url = '~(?:(https?)://([^\s<]+)|(www\.[^\s<]+?\.[^\s<]+))(?<![\.,:])~i';
$target = (self::options()->target) ? ' target="_blank" ' : ''; // 新窗口打开
return preg_replace_callback($url, function ($matches) use ($target) {
Expand All @@ -351,6 +366,33 @@ public static function autoLink($content)
}
return $matches[0];
}, $content);

// // 如果当前浏览器地址栏中的url是在后台页面，则不进行转换操作
// if(self::isAdminPage()){
// return $content;
// }

// $url = '~(?:(https?)://([^\s<]+)|(www\.[^\s<]+?\.[^\s<]+))(?<![\.,:])~i';

// $pluginOption = self::options('ShortLinks'); // 插件选项
// $target = ($pluginOption->target) ? ' target="_blank" ' : ''; // 新窗口打开

// @preg_match_all($url, $content, $matches);
// if ($matches) {
// foreach ($matches[0] as $link) {
// if (self::isImageUrl($link)) {
// continue;
// }
// if (strpos($link, '://') !== false ) {
// if(self::isExternalLink($link)) {
// $aLink = '<a href="' . self::convertLink($link) . '" title="' . $link . '"' . $target . '>' . $link . '</a>';
// $content = str_replace($link, $aLink, $content);
// }
// }
// }
// }
// // echo json_encode($matches)."\n";
// return $content;
}

/**
Expand Down Expand Up @@ -459,4 +501,152 @@ public static function db()
return Typecho_Db::get();
}
}
}

/**
* 检查url是否外链
*
* @access private
* @param string $url
* @return boolean
*/
private static function isExternalLink(string $url)
{
$parsedUrl = parse_url($url);

// 检查url是否包含scheme（协议），例如http://或https://
if(isset($parsedUrl['scheme']) && ($parsedUrl['scheme'] == 'http' || $parsedUrl['scheme'] == 'https')) {
// 获取当前页面的Host( 192.168.174.130:33310 )
$currentDomain = $_SERVER['HTTP_HOST'];

// 获取链接的域名( 192.168.174.130 )
$linkDomain = $parsedUrl['host'];

// 检查链接的域名是否与当前页面的域名相同
if(strpos($currentDomain, $linkDomain) === false) {
return true; // 是外链
}
}

return false; // 不是外链
}

/**
* 检查url是否图片
*
* @access private
* @param string $url
* @return boolean
*/
private static function isImageUrl(string $url)
{
// 有的图片链接会带后缀，例如oss类图片，后面再改
$imageReg = '/\.(jpg|jepg|png|ico|bmp|gif|tiff)/i';
if (preg_match($imageReg, $url)) {
return true;
}else{
return false;
}
}

/**
* 是否后台页面
*
* @access private
* @return boolean
*/
private static function isAdminPage()
{
if(strpos($_SERVER['REQUEST_URI'],__TYPECHO_ADMIN_DIR__)!==false) {
return true;
}else{
return false;
}
}

/**
* 转换markdown中的外链
*
* @access private
* @param string $text
* @return string
*/
private static function convertExternalLinkToInternalLinkInMarkdown(string $text)
{
// 纯url转换，不将url转换为a标签，这种方式最保险（会失去a标签的特性，本身markdown语法规则就不提供新窗口打开特性）
// []()
$urlReg = '~(?:(https?)://([^\s<]+)|(www\.[^\s<]+?\.[^\s<]+))(?<![\.,:])~i';
$pluginOption = self::options('ShortLinks'); // 插件选项

// 取出所有 "```" 和 "```"之间的内容（即代码块），用于在下面替换前判断url是否在"代码块"之中，如果在"代码块"之中，则不处理
$codeBlocks = self::getCodeBlockContent($text);

@preg_match_all($urlReg, $text, $matches);
if ($matches) {
foreach ($matches[0] as $url) {
if (self::isImageUrl($url)) {
continue;
}

// 判断最后一个字符是否是")"，如果是则删除；
// 因为markdown语法规则中有"[]()"格式的链接，上述正则规则会把")"给匹配进去，所以得删除")"
if ($url[strlen($url) - 1] === ')') {
$url = substr($url, 0, -1);
}

if (strpos($url, '://') !== false) {
// 判断url是否在"代码块"中
if(self::isUrlInCodeBlock($codeBlocks,$url)){
continue;
}

if(self::isExternalLink($url)) {
$url_new = self::convertLink($url);
$text = str_replace($url, $url_new, $text);
}
}
}
}
return $text;
}

/**
* 取出"代码块"中的内容
*
* @access private
* @param string $content
* @return array[string] "代码块"数组
*/
private static function getCodeBlockContent(string $content)
{
$results = array();
$regex = '/```.*[^.](?P<matchCode>(.|[^.])*?)```/';

@preg_match_all($regex, $content, $matches);
if($matches){
foreach ($matches['matchCode'] as $match) {
$results[] = $match;
}
}
return $results;
}

/**
* 判断url是否在"代码块"中
*
* @access private
* @param array[string] $codeBlocks
* @param string $url
* @return boolean
*/
private static function isUrlInCodeBlock(array $codeBlocks,string $url)
{
foreach ($codeBlocks as $codeBlock) {
if (strpos($codeBlock, $url) !== false) {
return true;
}
}
return false;
}


}