341 lines
12 KiB
PHP
341 lines
12 KiB
PHP
<?php
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namespace app\api\controller;
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class Latex extends Base
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{
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public function __construct(\think\Request $request = null)
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{
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parent::__construct($request);
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}
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public function generateLatexPdf()
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{
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$data = $this->request->post();
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$rule = new Validate([
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'p_article_id' => 'require|number'
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]);
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if (!$rule->check($data)) {
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return jsonError($rule->getError());
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}
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try {
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// 获取文章信息
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$p_info = $this->production_article_obj->where('p_article_id', $data['p_article_id'])->find();
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if (!$p_info) {
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return jsonError('文章实例不存在');
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}
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// 获取作者信息
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$authors = $this->production_article_author_obj->where('p_article_id', $data['p_article_id'])->where('state', 0)->select();
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// 获取机构信息
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$organs = $this->production_article_organ_obj->where('p_article_id', $data['p_article_id'])->where('state', 0)->select();
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// 获取正文内容
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$main_contents = $this->production_article_main_obj->where('p_article_id', $data['p_article_id'])->where('state', 0)->order('p_main_id')->select();
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// 获取参考文献
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$references = $this->production_article_refer_obj->where('p_article_id', $data['p_article_id'])->where('state', 0)->order('index')->select();
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// 构建LaTeX内容
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$latex_content = $this->buildLatexContent($p_info, $authors, $organs, $main_contents, $references);
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// 创建临时目录
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$temp_dir = ROOT_PATH . 'public' . DS . 'temp_latex' . DS;
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if (!is_dir($temp_dir)) {
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mkdir($temp_dir, 0755, true);
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}
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// 生成唯一的文件名
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$filename = 'article_' . $p_info['p_article_id'] . '_' . time();
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$tex_file = $temp_dir . $filename . '.tex';
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$pdf_file = $temp_dir . $filename . '.pdf';
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// 写入LaTeX文件
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file_put_contents($tex_file, $latex_content);
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// 执行LaTeX编译命令生成PDF
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$command = sprintf(
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'cd %s && pdflatex -interaction=nonstopmode -output-directory=%s %s',
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escapeshellarg($temp_dir),
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escapeshellarg($temp_dir),
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escapeshellarg($tex_file)
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);
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// 执行命令
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$output = [];
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$return_var = 0;
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exec($command, $output, $return_var);
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// 检查PDF是否生成成功
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if (!file_exists($pdf_file) || filesize($pdf_file) == 0) {
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return jsonError('PDF生成失败，请检查LaTeX内容或系统环境');
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}
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// 移动PDF到正式目录
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$pdf_dir = ROOT_PATH . 'public' . DS . 'latex_pdfs' . DS;
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if (!is_dir($pdf_dir)) {
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mkdir($pdf_dir, 0755, true);
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}
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$final_pdf_path = $pdf_dir . $filename . '.pdf';
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rename($pdf_file, $final_pdf_path);
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// 清理临时文件
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if (file_exists($tex_file)) {
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unlink($tex_file);
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}
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// 清理辅助文件(.aux, .log等)
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$aux_file = $temp_dir . $filename . '.aux';
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$log_file = $temp_dir . $filename . '.log';
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if (file_exists($aux_file)) unlink($aux_file);
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if (file_exists($log_file)) unlink($log_file);
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// 返回PDF路径
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$relative_path = 'latex_pdfs/' . $filename . '.pdf';
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return jsonSuccess([
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'pdf_url' => $relative_path,
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'message' => 'PDF生成成功'
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]);
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} catch (\Exception $e) {
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return jsonError('生成过程中发生错误: ' . $e->getMessage());
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}
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}
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/**
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* 构建LaTeX文档内容
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* @param $p_info
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* @param $authors
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* @param $organs
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* @param $main_contents
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* @param $references
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* @return string
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*/
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private function buildLatexContent($p_info, $authors, $organs, $main_contents, $references)
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{
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// 构建机构映射
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$organ_map = [];
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foreach ($organs as $index => $organ) {
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$organ_map[$organ['p_article_organ_id']] = $index + 1;
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}
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// LaTeX文档开始
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$latex = '\documentclass[twocolumn]{article}' . "\n";
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$latex .= '\usepackage[utf8]{inputenc}' . "\n";
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$latex .= '\usepackage[T1]{fontenc}' . "\n";
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$latex .= '\usepackage{geometry}' . "\n";
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$latex .= '\usepackage{graphicx}' . "\n";
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$latex .= '\usepackage{amsmath}' . "\n";
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$latex .= '\usepackage{amsfonts}' . "\n";
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$latex .= '\usepackage{amssymb}' . "\n";
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$latex .= '\usepackage{setspace}' . "\n";
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$latex .= '\usepackage{titlesec}' . "\n";
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$latex .= '\usepackage{hyperref}' . "\n";
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$latex .= '\usepackage{caption}' . "\n";
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$latex .= '\usepackage{multicol}' . "\n";
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$latex .= '\usepackage{abstract}' . "\n";
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$latex .= '\geometry{left=1.5cm,right=1.5cm,top=2.5cm,bottom=2.5cm}' . "\n";
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$latex .= '\setstretch{1.5}' . "\n";
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$latex .= '\title{' . $this->escapeLatexText($p_info['title']) . '}' . "\n";
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// 处理作者和机构
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if (!empty($authors)) {
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$author_text = '';
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$affiliations = [];
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foreach ($authors as $author) {
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if ($author_text !== '') {
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$author_text .= ', ';
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}
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$author_text .= $this->escapeLatexText($author['first_name'] . ' ' . $author['last_name']);
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// 获取作者的机构
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$author_organs = $this->production_article_author_to_organ_obj
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->where('p_article_author_id', $author['p_article_author_id'])
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->where('state', 0)
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->select();
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foreach ($author_organs as $ao) {
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if (isset($organ_map[$ao['p_article_organ_id']])) {
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$author_text .= '$^{' . $organ_map[$ao['p_article_organ_id']] . '}$';
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}
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}
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if ($author['is_report'] == 1) {
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$author_text .= '$^{*}$';
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}
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}
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$latex .= '\author{' . $author_text . "\n";
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// 添加机构信息
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foreach ($organs as $index => $organ) {
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$latex .= '\\\\$' . ($index + 1) . '$ ' . $this->escapeLatexText($organ['organ_name']) . "\n";
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}
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if (!empty($authors)) {
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// 查找通讯作者
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$corresponding_authors = array_filter($authors, function($author) {
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return $author['is_report'] == 1;
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});
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if (!empty($corresponding_authors)) {
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$corr_author = reset($corresponding_authors);
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$latex .= '\\\\$*$ Corresponding author: ' .
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$this->escapeLatexText($corr_author['email']) . "\n";
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}
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}
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$latex .= '}' . "\n";
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}
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$latex .= '\date{}' . "\n";
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$latex .= '\begin{document}' . "\n";
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$latex .= '\maketitle' . "\n";
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// 摘要
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if (!empty($p_info['abstract'])) {
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$latex .= '\begin{abstract}' . "\n";
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$latex .= $this->escapeLatexText($p_info['abstract']) . "\n";
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$latex .= '\end{abstract}' . "\n";
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}
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// 关键词
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if (!empty($p_info['keywords'])) {
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$latex .= '\textbf{Keywords:} ' . $this->escapeLatexText($p_info['keywords']) . "\n";
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$latex .= '\sectionbreak' . "\n";
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}
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// 正文内容
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$in_section = false;
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$section_count = 0;
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foreach ($main_contents as $content) {
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$text = trim($content['content']);
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// 跳过空内容
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if (empty($text)) {
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continue;
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}
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// 检查是否是标题
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$clean_text = strip_tags($text);
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$lower_text = strtolower($clean_text);
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// 判断是否为章节标题
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if (stripos($lower_text, 'introduction') === 0 ||
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stripos($lower_text, 'methods') === 0 ||
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stripos($lower_text, 'results') === 0 ||
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stripos($lower_text, 'discussion') === 0 ||
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stripos($lower_text, 'conclusion') === 0 ||
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stripos($lower_text, 'references') === 0) {
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// 结束前一节
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if ($in_section) {
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$latex .= "\n" . '\sectionbreak' . "\n";
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}
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// 开始新节
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$section_count++;
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$section_title = $this->escapeLatexText($clean_text);
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$latex .= '\section{' . $section_title . '}' . "\n";
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$in_section = true;
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}
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// 检查是否是图片或表格占位符
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else if (preg_match('/<img[^>]*imageId=[\'"]([^\'"]+)[\'"][^>]*>/i', $text, $img_matches)) {
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$image_id = $img_matches[1];
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// 这里可以添加图片处理逻辑
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$latex .= '% 图片插入位置 (ID: ' . $image_id . ')' . "\n";
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$latex .= '\begin{figure}[htbp]' . "\n";
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$latex .= '\centering' . "\n";
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$latex .= '\includegraphics[width=0.8\textwidth]{image_' . $image_id . '}' . "\n";
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$latex .= '\caption{图片说明}' . "\n";
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$latex .= '\end{figure}' . "\n";
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}
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else if (preg_match('/<table[^>]*tableId=[\'"]([^\'"]+)[\'"][^>]*>/i', $text, $table_matches)) {
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$table_id = $table_matches[1];
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// 这里可以添加表格处理逻辑
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$latex .= '% 表格插入位置 (ID: ' . $table_id . ')' . "\n";
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$latex .= '\begin{table}[htbp]' . "\n";
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$latex .= '\centering' . "\n";
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$latex .= '\caption{表格说明}' . "\n";
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$latex .= '\begin{tabular}{|c|c|c|}' . "\n";
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$latex .= '\hline' . "\n";
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$latex .= '列1 & 列2 & 列3 \\\\' . "\n";
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$latex .= '\hline' . "\n";
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$latex .= '% 表格数据' . "\n";
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$latex .= '\hline' . "\n";
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$latex .= '\end{tabular}' . "\n";
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$latex .= '\end{table}' . "\n";
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}
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// 普通段落文本
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else {
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// 移除HTML标签并转义特殊字符
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$plain_text = $this->escapeLatexText(strip_tags($text));
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$latex .= $plain_text . "\n\n";
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}
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}
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// 参考文献
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if (!empty($references)) {
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$latex .= '\section*{References}' . "\n";
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$latex .= '\begin{thebibliography}{99}' . "\n";
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foreach ($references as $index => $ref) {
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$ref_text = isset($ref['refer_frag']) ? $ref['refer_frag'] : $ref['refer_content'];
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$latex .= '\bibitem{} ' . $this->escapeLatexText($ref_text) . "\n";
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}
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$latex .= '\end{thebibliography}' . "\n";
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}
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$latex .= '\end{document}' . "\n";
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return $latex;
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}
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/**
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* 转义LaTeX特殊字符
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* @param string $text
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* @return string
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*/
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private function escapeLatexText($text)
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{
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// 移除HTML标签
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$text = strip_tags($text);
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// 转义LaTeX特殊字符
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$escape_chars = [
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'\\' => '\\textbackslash{}',
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'&' => '\\&',
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'%' => '\\%',
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'$' => '\\$',
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'#' => '\\#',
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'_' => '\\_',
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'{' => '\\{',
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'}' => '\\}',
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'~' => '\\textasciitilde{}',
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'^' => '\\textasciicircum{}',
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'"' => '\\"{}',
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'\'' => '\\\'{}',
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'<' => '\\textless{}',
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'>' => '\\textgreater{}',
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];
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foreach ($escape_chars as $char => $replacement) {
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$text = str_replace($char, $replacement, $text);
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}
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return $text;
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}
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} |