428 lines
12 KiB
PHP
428 lines
12 KiB
PHP
<?php
|
||
|
||
namespace template;
|
||
|
||
/**
|
||
* 模板标签库（支持模板继承）
|
||
* Class Engine
|
||
* @package template
|
||
*/
|
||
class Engine
|
||
{
|
||
/**
|
||
* @var string 左定界符
|
||
*/
|
||
private $left = '<';
|
||
|
||
/**
|
||
* @var string 右定界符
|
||
*/
|
||
private $right = '>';
|
||
|
||
/**
|
||
* @var array 标签定义
|
||
*/
|
||
protected $tags = [];
|
||
|
||
/**
|
||
* @var null 模板配置
|
||
*/
|
||
protected $config = null;
|
||
|
||
/**
|
||
* @var null 模板路径
|
||
*/
|
||
private $viewDir = null;
|
||
|
||
/**
|
||
* @var array 默认标签定义
|
||
*/
|
||
private $defaultTags = [
|
||
'if' => ['attr' => 'condition', 'close' => 1],
|
||
'else' => ['attr' => 'condition', 'close' => 0],
|
||
'volist' => ['attr' => 'name,id,key', 'close' => 1],
|
||
'assign' => ['attr' => 'name,value', 'close' => 0],
|
||
'switch' => ['attr' => 'name', 'close' => 1],
|
||
'case' => ['attr' => 'value', 'close' => 1],
|
||
'default' => ['attr' => '', 'close' => 1]
|
||
];
|
||
|
||
/**
|
||
* 构造方法
|
||
* Engine constructor.
|
||
* @throws \Exception
|
||
*/
|
||
public function __construct()
|
||
{
|
||
// 仅作示例，请在外部传入模板目录
|
||
$this->viewDir = './demo/';
|
||
}
|
||
|
||
/**
|
||
* 处理模板继承
|
||
*/
|
||
private function parseExtend($tmpl)
|
||
{
|
||
$pattern = '#' . $this->left . 'extend +file=[\'"](.*?)[\'"] +/' . $this->right . '#';
|
||
preg_match($pattern, $tmpl, $matches);
|
||
if (!empty($matches)) {
|
||
$blockPattern = '#' . $this->left . 'block +name=[\'"](.*?)[\'"]' . $this->right;
|
||
$blockPattern .= '([\s\S]*?)' . $this->left . '\/block' . $this->right . '#';
|
||
// 获得被继承的模板内容
|
||
$file = $this->viewDir . $matches[1] . '.html';
|
||
$extendFileContent = null;
|
||
if (file_exists($file)) {
|
||
$extendFileContent = file_get_contents($file);
|
||
}
|
||
// 处理继承中的include标签
|
||
$tempContent = $this->parseInclude($extendFileContent);
|
||
$extendFileContent = $tempContent !== false ? $tempContent : $extendFileContent;
|
||
// 被继承模板中的块
|
||
preg_match_all($blockPattern, $extendFileContent, $extendResult);
|
||
// 继承模板中的块
|
||
preg_match_all($blockPattern, $tmpl, $templateResult);
|
||
// 组合搜索的块数组
|
||
$search = [];
|
||
$defaultContent = [];
|
||
for ($i = 0; $i < count($extendResult[0]); $i++) {
|
||
$search[$extendResult[1][$i]] = $extendResult[0][$i];
|
||
$defaultContent[$extendResult[1][$i]] = $extendResult[2][$i];
|
||
}
|
||
// 组合替换的块数组
|
||
$replace = [];
|
||
for ($j = 0; $j < count($templateResult[0]); $j++) {
|
||
$replace[$templateResult[1][$j]] = $templateResult[2][$j];
|
||
}
|
||
// 块是否在继承模板中存在
|
||
$searchArray = [];
|
||
$replaceArray = [];
|
||
foreach ($search as $key => $value) {
|
||
$searchArray[] = $value;
|
||
if (isset($replace[$key])) {
|
||
$replaceArray[] = $replace[$key];
|
||
} else {
|
||
$replaceArray[] = $defaultContent[$key];
|
||
}
|
||
}
|
||
$tmpl = str_replace($searchArray, $replaceArray, $extendFileContent);
|
||
}
|
||
return $tmpl;
|
||
}
|
||
|
||
/**
|
||
* 处理include标签
|
||
* @return bool
|
||
*/
|
||
private function parseInclude($tmpl)
|
||
{
|
||
$pattern = '#' . $this->left . 'include +file=[\'"](.*?)[\'"] +/' . $this->right . '#';
|
||
$tmpl = preg_replace_callback($pattern, function ($result) {
|
||
$str = null;
|
||
$file = $this->viewDir . $result[1] . '.html';
|
||
if (file_exists($file)) {
|
||
$str = file_get_contents($file);
|
||
}
|
||
return $str;
|
||
}, $tmpl);
|
||
// 处理多层include
|
||
if ($this->hasInclude($tmpl)) {
|
||
$tmpl = $this->parseInclude($tmpl);
|
||
}
|
||
return $tmpl;
|
||
}
|
||
|
||
/**
|
||
* 检测是否含有include
|
||
* @param $tmpl
|
||
* @return bool
|
||
*/
|
||
private function hasInclude($tmpl)
|
||
{
|
||
$pattern = '#' . $this->left . 'include +file=[\'"](.*?)[\'"] +/' . $this->right . '#';
|
||
preg_match($pattern, $tmpl, $matches);
|
||
return !empty($matches);
|
||
}
|
||
|
||
/**
|
||
* 分析参数以及函数输出
|
||
*/
|
||
private function parseVars($tmpl)
|
||
{
|
||
preg_match_all('#{(.*?)}#', $tmpl, $matches);
|
||
$search = [];
|
||
$replace = [];
|
||
for ($i = 0; $i < count($matches[0]); $i++) {
|
||
$start = substr($matches[1][$i], 0, 1);
|
||
if ($start == '$') {
|
||
$search[] = $matches[0][$i];
|
||
$replace[] = '<?php echo ' . $matches[1][$i] . '; ?>';
|
||
} elseif ($start == ':') {
|
||
$search[] = $matches[0][$i];
|
||
$replace[] = '<?php echo ' . ltrim($matches[1][$i], ':') . '; ?>';
|
||
}
|
||
}
|
||
$tmpl = str_replace($search, $replace, $tmpl);
|
||
return $tmpl;
|
||
}
|
||
|
||
/**
|
||
* 处理用户自定义标签
|
||
* @param $tmpl
|
||
* @return null|string|string[]
|
||
*/
|
||
public function parseCustomizeTags($tmpl)
|
||
{
|
||
return $this->parseTags($tmpl, $this->tags);
|
||
}
|
||
|
||
/**
|
||
* 处理默认的标签
|
||
* @param $tmpl
|
||
* @return null|string|string[]
|
||
*/
|
||
private function parseDefaultTags($tmpl)
|
||
{
|
||
return $this->parseTags($tmpl, $this->defaultTags);
|
||
}
|
||
|
||
/**
|
||
* 进行标签处理
|
||
* @param $tmpl
|
||
* @param $tags
|
||
* @return null|string|string[]
|
||
*/
|
||
private function parseTags($tmpl, $tags)
|
||
{
|
||
foreach ($tags as $name => $item) {
|
||
$attr = ($item['attr']) ? ' +(.*?)' : null;
|
||
$pattern = '#' . $this->left . $name . $attr . ($item['close'] ? $this->right : '\/' . $this->right . '#');
|
||
if ($item['close']) {
|
||
$pattern .= '([\s\S]*?)' . $this->left . '\/' . $name . $this->right . '#';
|
||
}
|
||
preg_match_all($pattern, $tmpl, $matches);
|
||
for ($i = 0; $i < count($matches[0]); $i++) {
|
||
$attrPattern = '#(.*?)=[\'"](.*?)[\'"]#';
|
||
preg_match_all($attrPattern, $matches[1][$i], $result);
|
||
$tag = [];
|
||
if (!empty($result)) {
|
||
foreach ($result[1] as $key => $value) {
|
||
$tag[trim($value, ' ')] = $result[2][$key];
|
||
}
|
||
}
|
||
if ($item['close']) {
|
||
$tagContent = isset($matches[2][$i]) ? $matches[2][$i] : (($attr) ? null : $matches[1][$i]);
|
||
$content = $this->{'_' . $name . '_start'}($tag, $tagContent);
|
||
if ($item['close']) {
|
||
$content .= $this->{'_' . $name . '_end'}($tag, $tagContent);
|
||
}
|
||
} else {
|
||
$content = $this->{'_' . $name . '_start'}($tag);
|
||
}
|
||
$tmpl = str_replace($matches[0][$i], $content, $tmpl);
|
||
}
|
||
}
|
||
return preg_replace('#\?>([\r|\n|\s]*?)<\?php#', '', $tmpl);
|
||
}
|
||
|
||
/**
|
||
* 处理raw标签
|
||
* @param $tmpl
|
||
* @return null|string|string[]
|
||
*/
|
||
private function parseRaw($tmpl)
|
||
{
|
||
$pattern = '#' . $this->left . 'raw' . $this->right . '([\s\S]*?)';
|
||
$pattern .= $this->left . '\/raw' . $this->right . '#';
|
||
$tmpl = preg_replace_callback($pattern, function ($matches) {
|
||
return str_replace([
|
||
$this->left, $this->right,
|
||
'{', '}'
|
||
], [
|
||
'<raw!--', '--raw>',
|
||
'{raw!--', '--raw}'
|
||
], $matches[1]);
|
||
}, $tmpl);
|
||
return $tmpl;
|
||
}
|
||
|
||
/**
|
||
* 还原raw
|
||
* @param $tmpl
|
||
* @return null|string|string[]
|
||
*/
|
||
public function returnRaw($tmpl)
|
||
{
|
||
$pattern = '#[{|<]raw!--([\s\S]*?)--raw[>|}]#';
|
||
$tmpl = preg_replace_callback($pattern, function ($matches) {
|
||
$left = substr($matches[0], 0, 1);
|
||
$right = substr($matches[0], -1);
|
||
return $left . $matches[1] . $right;
|
||
}, $tmpl);
|
||
return $tmpl;
|
||
}
|
||
|
||
/**
|
||
* if标签
|
||
* @param $tag
|
||
* @param $content
|
||
* @return string
|
||
*/
|
||
private function _if_start($tag, $content)
|
||
{
|
||
return '<?php if (' . $tag['condition'] . '): ?>' . $content;
|
||
}
|
||
|
||
/**
|
||
* if标签结束
|
||
* @return string
|
||
*/
|
||
private function _if_end()
|
||
{
|
||
return '<?php endif; ?>';
|
||
}
|
||
|
||
/**
|
||
* else标签（支持条件）
|
||
* @param $tag
|
||
* @return string
|
||
*/
|
||
private function _else_start($tag)
|
||
{
|
||
if (isset($tag['condition'])) {
|
||
$parse = '<?php elseif (' . $tag['condition'] . '): ?>';
|
||
} else {
|
||
$parse = '<?php else: ?>';
|
||
}
|
||
return $parse;
|
||
}
|
||
|
||
/**
|
||
* volist标签
|
||
* @param $tag
|
||
* @param $content
|
||
* @return string
|
||
*/
|
||
private function _volist_start($tag, $content)
|
||
{
|
||
if (substr($tag['name'], 0, 1) == ':') {
|
||
$name = substr($tag['name'], 1);
|
||
} else {
|
||
$name = '$' . $tag['name'];
|
||
}
|
||
$key = (empty($tag['key'])) ? null : '$' . $tag['key'] . ' = 0;';
|
||
$parse = '<?php ' . $key . ' foreach (' . $name . ' as $' . $tag['id'] . '): ';
|
||
$parse .= ($key ? '$' . $tag['key'] . '++;' : null) . ' ?>' . $content;
|
||
return $parse;
|
||
}
|
||
|
||
/**
|
||
* volist标签结束
|
||
* @return string
|
||
*/
|
||
private function _volist_end()
|
||
{
|
||
return '<?php endforeach; ?>';
|
||
}
|
||
|
||
/**
|
||
* assign标签
|
||
* @param $tag
|
||
* @return string
|
||
*/
|
||
private function _assign_start($tag)
|
||
{
|
||
return '<?php $' . $tag['name'] . ' = ' . $tag['value'] . '; ?>';
|
||
}
|
||
|
||
/**
|
||
* switch标签
|
||
* @param $tag
|
||
* @param $content
|
||
* @return string
|
||
*/
|
||
private function _switch_start($tag, $content)
|
||
{
|
||
$parse = '<?php switch($' . $tag['name'] . '): ?>' . $content;
|
||
return $parse;
|
||
}
|
||
|
||
/**
|
||
* switch标签结束
|
||
* @return string
|
||
*/
|
||
private function _switch_end()
|
||
{
|
||
$parse = '<?php endswitch; ?>';
|
||
return $parse;
|
||
}
|
||
|
||
/**
|
||
* case标签
|
||
* @param $tag
|
||
* @param $content
|
||
* @return string
|
||
*/
|
||
private function _case_start($tag, $content)
|
||
{
|
||
if (is_numeric($tag['value'])) {
|
||
$caseVar = $tag['value'];
|
||
} else {
|
||
$caseVar = '\'' . $tag['value'] . '\'';
|
||
}
|
||
$parse = '<?php case ' . $caseVar . ': ?>' . $content;
|
||
return $parse;
|
||
}
|
||
|
||
/**
|
||
* case标签结束
|
||
* @return string
|
||
*/
|
||
private function _case_end()
|
||
{
|
||
$parse = '<?php break; ?>';
|
||
return $parse;
|
||
}
|
||
|
||
/**
|
||
* default标签
|
||
* @param $tag
|
||
* @param $content
|
||
* @return string
|
||
*/
|
||
private function _default_start($tag, $content)
|
||
{
|
||
$parse = '<?php default: ?>' . $content;
|
||
return $parse;
|
||
}
|
||
|
||
/**
|
||
* default标签结束
|
||
* @return string
|
||
*/
|
||
private function _default_end()
|
||
{
|
||
$parse = '<?php break; ?>';
|
||
return $parse;
|
||
}
|
||
|
||
/**
|
||
* 获取编译后的内容
|
||
* @param $tmpl
|
||
* @return bool|mixed|null|string|string[]
|
||
*/
|
||
public function compile($tmpl)
|
||
{
|
||
$tmpl = $this->parseRaw($tmpl);
|
||
// 处理模板继承标签
|
||
$tmpl = $this->parseExtend($tmpl);
|
||
// 处理include标签
|
||
$tmpl = $this->parseInclude($tmpl);
|
||
// 处理变量以及函数
|
||
$tmpl = $this->parseVars($tmpl);
|
||
// 处理定义的标签
|
||
$tmpl = $this->parseDefaultTags($tmpl);
|
||
return $tmpl;
|
||
}
|
||
|
||
}
|