zbparse/flask_app/main/截取pdf.py

import re
import os
from PyPDF2 import PdfReader, PdfWriter
from flask_app.general.merge_pdfs import merge_pdfs
import concurrent.futures
import logging

def get_global_logger(unique_id):
    if unique_id is None:
        return logging.getLogger()  # 获取默认的日志器
    logger = logging.getLogger(unique_id)
    return logger

logger = None

def clean_page_content(text, common_header):
    # 首先删除抬头公共部分
    if common_header:  # 确保有公共抬头才进行替换
        for header_line in common_header.split('\n'):
            if header_line.strip():  # 只处理非空行
                # 替换首次出现的完整行
                text = re.sub(r'^' + re.escape(header_line.strip()) + r'\n?', '', text, count=1)

    # 删除页码 eg:89/129   这个代码分三步走可以把89/129完全删除
    text = re.sub(r'^\s*\d+\s*(?=\D)', '', text)  # 删除开头的页码，仅当紧跟非数字字符时
    text = re.sub(r'\s+\d+\s*$', '', text)        # 删除结尾的页码
    text = re.sub(r'\s*\/\s*\d+\s*', '', text)    # 删除形如 /129 的页码
    text = re.sub(r'\s*[—-]\s*\d+\s*[—-]\s*', '', text)  # 删除形如 '—2—' 或 '-2-' 的页码
    return text

def extract_common_header(pdf_path):
    pdf_document = PdfReader(pdf_path)
    headers = []
    total_pages = len(pdf_document.pages)

    # 确定要读取的页数和起始页
    if total_pages == 2:
        pages_to_read = 2
        start_page = 0
    else:
        pages_to_read = 3
        middle_page = total_pages // 2
        start_page = max(0, middle_page - 1)

    for i in range(start_page, min(start_page + pages_to_read, total_pages)):
        page = pdf_document.pages[i]
        text = page.extract_text() or ""
        if text:
            # 只取每页的前三行
            first_lines = text.strip().split('\n')[:3]
            headers.append(first_lines)

    if len(headers) < 2:
        return ""  # 如果没有足够的页来比较，返回空字符串

    # 寻找每一行中的公共部分，按顺序保留
    common_headers = []
    for lines in zip(*headers):
        # 提取第一行的词汇顺序
        first_words = lines[0].split()
        # 筛选所有页面都包含的词汇，保持顺序
        common_line = [word for word in first_words if all(word in line.split() for line in lines[1:])]
        if common_line:
            common_headers.append(' '.join(common_line))

    return '\n'.join(common_headers)

def save_pages_to_new_pdf(pdf_path, output_folder, output_suffix, start_page, end_page, common_header):
    try:
        # 获取文件基本名称
        base_file_name = os.path.splitext(os.path.basename(pdf_path))[0]

        # 构建主要输出文件路径
        output_pdf_path = os.path.join(output_folder, f"{base_file_name}_{output_suffix}.pdf")
        # 读取PDF文件
        pdf_document = PdfReader(pdf_path)
        total_pages = len(pdf_document.pages)

        # 检查起始和结束页码是否有效
        if start_page < 0 or end_page >= total_pages or start_page > end_page:
            print(f"无效的页面范围: {start_page} 到 {end_page}")
            return ""

        # 如果 output_suffix 是 'notice'，保存 start_page 之前的页面(若遇到'目录'，则截取到'目录')
        if output_suffix == 'notice' and start_page > 0:
            before_pdf_path = os.path.join(output_folder, f"{base_file_name}_before.pdf")
            before_doc = PdfWriter()
            toc_page = -1

            # 查找目录页
            for page_num in range(min(start_page, total_pages)):
                page_text = pdf_document.pages[page_num].extract_text()
                cleaned_text = clean_page_content(page_text, common_header)
                if re.search(r'目\s*录', cleaned_text, re.MULTILINE):
                    toc_page = page_num
                    break

            # 确定截取的页数
            pages_to_extract = toc_page + 1 if toc_page != -1 else start_page

            # 提取页面
            for page_num in range(pages_to_extract):
                before_doc.add_page(pdf_document.pages[page_num])
            with open(before_pdf_path, 'wb') as f_before:
                before_doc.write(f_before)
            # print(f"已保存页面从 0 到 {pages_to_extract} 为 {before_pdf_path}")

        # 提取指定范围的页面
        output_doc = PdfWriter()
        for page_num in range(start_page, end_page + 1):
            output_doc.add_page(pdf_document.pages[page_num])

        # 保存新的PDF文件
        with open(output_pdf_path, 'wb') as f_output:
            output_doc.write(f_output)

        print(f"{output_suffix} 已截取并保存页面从 {start_page + 1} 到 {end_page + 1} 为 {output_pdf_path}")
        return output_pdf_path

    except Exception as e:
        print(f"Error in save_pages_to_new_pdf: {e}")
        return ""  # 返回空字符串

def extract_pages_tobidders_notice(pdf_path, output_folder,begin_pattern, begin_page,common_header):
    pdf_document = PdfReader(pdf_path)
    exclusion_pattern = re.compile(r'文件的构成|文件的组成|须对应|需对应|须按照|需按照|须根据|需根据')
    def run_extraction():
        start_page = None
        mid_page = None
        end_page = None
        chapter_type = None  # 用于存储“章”或“部分”

        for i, page in enumerate(pdf_document.pages):
            text = page.extract_text() or ""
            cleaned_text = clean_page_content(text, common_header)

            if exclusion_pattern and re.search(exclusion_pattern, cleaned_text) and mid_page is not None:
                continue

            if start_page is None:
                match = re.search(begin_pattern, cleaned_text)
                if match and i > begin_page:
                    start_page = i
                    matched_text = match.group(0)  # 获取整个匹配的文本
                    if '章' in matched_text:
                        chapter_type = '章'
                    elif '部分' in matched_text:
                        chapter_type = '部分'
                    else:
                        chapter_type = None  # 未匹配到“章”或“部分”

                    if chapter_type:
                        # 根据 chapter_type 动态生成 end_pattern
                        end_pattern = re.compile(
                            rf'^第[一二三四五六七八九十百千]+?(?:{chapter_type})\s*[\u4e00-\u9fff]+|'  # Match chapter pattern
                            r'^评标办法前附表|'  # Match "评标办法前附表" at the beginning of a line
                            r'^附录(?:一)?[：:]|'  # Match "附录一" with optional "一" and colon
                            r'^附件(?:一)?[：:]|'  # Match "附件一" with optional "一" and colon
                            r'^附表(?:一)?[：:]',  # Match "附表一" with optional "一" and colon
                            re.MULTILINE
                        )
                        # print(f"动态生成的 end_pattern: {end_pattern.pattern}")  # 打印生成的 end_pattern

                        # 根据 chapter_type 动态生成 additional_mid_pattern
                        if chapter_type == '章':
                            additional_mid_pattern = r'^第[一二三四五六七八九十百千]+?(?:部分)'
                        elif chapter_type == '部分':
                            additional_mid_pattern = r'^第[一二三四五六七八九十百千]+?(?:章)'
                        else:
                            additional_mid_pattern = ''

                        # 定义基础的 mid_pattern
                        base_mid_pattern = (
                            r'^\s*(?:[（(]\s*[一1]?\s*[)）]\s*[、．.]*|[一1][、．.]+|[、．.]+)\s*(说\s*明|总\s*则)'
                            r'|^((投标人?|磋商|供应商|谈判供应商|磋商供应商)\s*须知正文部分)'
                        )
                        # 合并基础模式和额外模式
                        if additional_mid_pattern:
                            combined_mid_pattern = re.compile(
                                rf'(?:{base_mid_pattern})|(?:{additional_mid_pattern})',
                                re.MULTILINE
                            )
                        else:
                            combined_mid_pattern = re.compile(
                                rf'{base_mid_pattern}',
                                re.MULTILINE
                            )
                        # print(f"生成的 combined_mid_pattern: {combined_mid_pattern.pattern}")  # 打印 combined_mid_pattern
                    else:
                        # 如果未匹配到“章”或“部分”，使用默认的 end_pattern 和 mid_pattern
                        end_pattern = re.compile(
                            r'^第[一二三四五六七八九十百千]+(?:章|部分)\s*[\u4e00-\u9fff]+|'
                            r'^评标办法前附表|'  # Match "评标办法前附表" at the beginning of a line
                            r'^附录(?:一)?[：:]|'  # Match "附录一" with optional "一" and colon
                            r'^附件(?:一)?[：:]|'  # Match "附件一" with optional "一" and colon
                            r'^附表(?:一)?[：:]',  # Match "附表一" with optional "一" and colon
                            re.MULTILINE
                        )
                        print(f"使用默认的 end_pattern: {end_pattern.pattern}")  # 打印默认的 end_pattern

                        # 定义基础的 mid_pattern
                        base_mid_pattern = r'^\s*(?:[（(]\s*[一1]?\s*[)）]\s*[、．.]*|[一1][、．.]+|[、．.]+)\s*(说\s*明|总\s*则)'
                        combined_mid_pattern = re.compile(
                            rf'{base_mid_pattern}',
                            re.MULTILINE
                        )
                        print(
                            f"使用默认的 combined_mid_pattern: {combined_mid_pattern.pattern}")  # 打印默认的 combined_mid_pattern

                    continue

            if start_page is not None and mid_page is None and combined_mid_pattern:
                if re.search(combined_mid_pattern, cleaned_text):
                    mid_page = i
            if start_page is not None and mid_page is not None and chapter_type:
                if re.search(end_pattern, cleaned_text):
                    if mid_page is None:
                        if i > start_page:
                            end_page = i
                            break
                    else:
                        if i > mid_page:
                            end_page = i
                            break

        return start_page, mid_page, end_page

    # 运行提取
    start_page, mid_page, end_page = run_extraction()
    if start_page is None or end_page is None or mid_page is None:
        print(f"first: tobidders_notice 未找到起始或结束页在文件 {pdf_path} 中！尝试备用提取策略。")
        return "",""

    path1 = save_pages_to_new_pdf(pdf_path, output_folder, "tobidders_notice_table", start_page,mid_page, common_header)
    path2 = save_pages_to_new_pdf(pdf_path, output_folder, "tobidders_notice", mid_page,end_page, common_header)
    return path1,path2



def extract_pages(pdf_path, output_folder, begin_pattern, begin_page, end_pattern, output_suffix,common_header,is_secondary_match=False):
    # 打开PDF文件
    pdf_document = PdfReader(pdf_path)
    start_page = None
    end_page = None

    # 遍历文档的每一页，查找开始和结束短语的位置
    for i in range(len(pdf_document.pages)):
        page = pdf_document.pages[i]
        text = page.extract_text()
        if text:
            cleaned_text = clean_page_content(text, common_header)
            if not is_secondary_match:
                if re.search(begin_pattern, cleaned_text) and i >= begin_page:
                    if output_suffix == "invalid" and start_page:
                        continue
                    else:
                        start_page = i
            else:
                if re.search(begin_pattern, cleaned_text) and i >=begin_page:
                    if output_suffix == "notice" and start_page:     #考虑投标人须知前附表中有' 同招标公告 '的情况
                        pass
                    else:
                        start_page = i
            if start_page is not None and re.search(end_pattern, cleaned_text):
                condition = i > start_page
                if condition:
                    is_invalid_condition = output_suffix == "invalid" and i > 30  # 这边默认无效投标至少有30页
                    if is_invalid_condition or output_suffix != "invalid":
                        end_page = i
                        break  # 找到结束页后退出循环

    # 移除对 extract_pages_twice 的调用
    if start_page is None or end_page is None:
        print(f"{output_suffix} first: 未找到起始或结束页在文件 {pdf_path} 中！")
        return [""]
    else:
        return [save_pages_to_new_pdf(pdf_path, output_folder, output_suffix, start_page, end_page, common_header)]

# def process_input(input_path, output_folder, begin_pattern, begin_page, end_pattern, output_suffix,common_header,is_secondary_match):
#     # 确保输出文件夹存在
#     if not os.path.exists(output_folder):
#         os.makedirs(output_folder)
#     if os.path.isdir(input_path):
#         generated_files = []
#         # 遍历文件夹内的所有PDF文件
#         for file in os.listdir(input_path):
#             if file.endswith(".pdf"):
#                 pdf_path = os.path.join(input_path, file)
#                 output_pdf_path = extract_pages(pdf_path, output_folder, begin_pattern, begin_page, end_pattern, output_suffix,common_header,is_secondary_match)
#                 if output_pdf_path and os.path.isfile(output_pdf_path):
#                     generated_files.append(output_pdf_path)
#         return generated_files
#     elif os.path.isfile(input_path) and input_path.endswith(".pdf"):
#         # 处理单个PDF文件
#         output_pdf_path = extract_pages(input_path, output_folder, begin_pattern, begin_page, end_pattern, output_suffix,common_header,is_secondary_match)
#         if output_pdf_path and os.path.isfile(output_pdf_path):
#             return [output_pdf_path]  # 以列表形式返回，以保持一致性
#     else:
#         print("提供的路径既不是文件夹也不是PDF文件。")
#     return []


def get_start_and_common_header(input_path):
    common_header = extract_common_header(input_path)
    last_begin_index = 0
    begin_pattern = re.compile(r'.*(?:招标公告|投标邀请书|投标邀请函)\s*$',re.MULTILINE)
    pdf_document = PdfReader(input_path)
    for i, page in enumerate(pdf_document.pages):
        text = page.extract_text()
        if text:
            cleaned_text = clean_page_content(text, common_header)
            if begin_pattern.search(cleaned_text):
                last_begin_index = i  # 更新第一个匹配的索引，页码从0开始
                return common_header,last_begin_index
    return common_header,last_begin_index

def truncate_pdf_main(input_path, output_folder, selection):
    if os.path.isdir(input_path):
        generated_files = []
        for file_name in os.listdir(input_path):
            if file_name.endswith('.pdf'):
                file_path = os.path.join(input_path, file_name)
                files = truncate_pdf_main(file_path, output_folder, selection)
                if files:
                    generated_files.extend(files)
        return generated_files
    elif os.path.isfile(input_path) and input_path.endswith('.pdf'):
        # base_file_name = os.path.splitext(os.path.basename(input_path))[0]
        common_header,last_begin_index = get_start_and_common_header(input_path)
        # print(last_begin_index)
        if selection == 1:
            # Selection 1: 投标人须知前附表
            pattern_pairs = [
                (
                    re.compile(
                        r'(?:第[一二三四五六七八九十百千]+(?:章|部分)\s*(?:投标人?|磋商|供应商|谈判供应商|磋商供应商)须知+|(?:一\s*、\s*)?(?:投标人?|磋商|供应商)须知前附表)'),
                    re.compile(
                        r'第[一二三四五六七八九十]+章\s*评标办法|^评标办法前附表|^附录(?:一)?[：:]|^附件(?:一)?[：:]|^附表(?:一)?[：:]',
                        re.MULTILINE)
                )
            ]
            output_suffix="tobidders_notice"
        elif selection == 2:
            # Selection 2: 评标办法
            pattern_pairs = [
                (
                    re.compile(r'第[一二三四五六七八九十]+章\s*评标办法'),  # Alternative begin pattern
                    re.compile(r'评标办法正文|评标办法')  # Alternative end pattern
                ),
            ]
            output_suffix = "evaluation_method"

        elif selection == 3:
            # Selection 3: 资格审查条件
            pattern_pairs = [
                (
                    re.compile(r'^(?:附录(?:[一1])?[：:]|附件(?:[一1])?[：:]|附表(?:[一1])?[：:]).*(?:资质|能力|信誉).*$',
                               re.MULTILINE),
                    re.compile(
                        r'^(?:附录[一二三四五六七八九1-9]*[：:]|附件[一二三四五六七八九1-9]*[：:]|附表[一二三四五六七八九1-9]*[：:])(?!.*(?:资质|能力|信誉)).*$'
                        r'^第[一二三四五六七八九1-9]+(?:章|部分)\s*[\u4e00-\u9fff]+', re.MULTILINE)
                )
            ]
            output_suffix = "qualification"
        elif selection == 4:
            # Selection 4: 招标公告
            pattern_pairs = [
                (
                    re.compile(
                        r'^第[一二三四五六七八九十百千]+(?:章|部分).*?(?:公告|邀请书|邀请函).*|^第一卷|^投标邀请书'),
                    re.compile(r'^第[一二三四五六七八九十百千]+(?:章|部分)\s*[\u4e00-\u9fff]+', re.MULTILINE)
                ),
                (
                    re.compile(r'.*(?:招标公告|投标邀请书|投标邀请函)\s*$', re.MULTILINE),
                    re.compile(r".*(?:投标人须知|投标人须知前附表)\s*$", re.MULTILINE)
                )
            ]
            output_suffix = "notice"

        elif selection == 5:
            # Selection 5: 无效标
            pattern_pairs = [
                (
                    re.compile(r'第[一二三四五六七八九十]+章\s*(招标公告|.*邀请.*)|第一卷|招标编号:|招标编号：'),
                    re.compile(r'第[一二三四五六七八九十]+章\s*合同|[：:]清标报告|^第二卷', re.MULTILINE)
                )
            ]
            output_suffix = "invalid"

        else:
            print("无效的选择:请选择1-5")
            return [""]

        for idx, (begin_pattern, end_pattern) in enumerate(pattern_pairs, start=1):
            is_secondary_match = (idx == 2)
            if selection == 1:      #投标人须知
                begin_page = 3
                output_paths = list(
                    extract_pages_tobidders_notice(input_path,output_folder, begin_pattern, begin_page, common_header))
                if output_paths and any(os.path.isfile(f) for f in output_paths):
                    return output_paths
                else:
                    # print(f"Selection {selection}: 使用组合提取函数失败。尝试下一个模式对。")
                    continue
            if selection == 2:    #评分细则
                begin_page = 10
            else:
                begin_page = last_begin_index
            output_paths = extract_pages(
                input_path,
                output_folder,
                begin_pattern,
                begin_page=begin_page,
                end_pattern=end_pattern,
                output_suffix=output_suffix,
                common_header=common_header,
                is_secondary_match=is_secondary_match
            )
            if output_paths and any(os.path.isfile(f) for f in output_paths):
                # print(f"Selection {selection}: 使用模式对 {idx} 成功提取。")
                return output_paths  # Return immediately upon successful extraction
            else:
                # print(f"Selection {selection}: 使用模式对 {idx} 失败。尝试下一个模式对。")
                continue

        # If all pattern pairs failed, attempt a fallback
        print(f"Selection {selection}: 所有模式对都未匹配成功。尝试执行 extract_pages_twice 或返回空。")
        fallback_result = extract_pages_twice(input_path, output_folder, output_suffix, common_header, last_begin_index)
        if fallback_result and any(os.path.isfile(f) for f in fallback_result):
            return fallback_result
        else:
            if selection == 1:
                return ["", ""]
            else:
                return ['']
    else:
        print("Invalid input path. It is neither a PDF file nor a directory containing PDF files.")
        return ['']


def extract_pages_twice(pdf_path, output_folder, output_suffix,common_header,last_begin_index):
    """
    处理 PDF 文件，作为 truncate_pdf_main 的后备方法。
    此函数将在所有模式对都失败后调用。
    """
    try:
        pdf_document = PdfReader(pdf_path)
        if output_suffix == "qualification":
            begin_pattern = r'^(?:附录(?:[一1])?[：:]|附件(?:[一1])?[：:]|附表(?:[一1])?[：:])'
            end_pattern = re.compile(
                r'^(?:附录[一二三四五六七八九1-9]*[：:]|附件[一二三四五六七八九1-9]*[：:]|附表[一二三四五六七八九1-9]*[：:])(?!.*(?:资质|能力|信誉)).*$|'
                r'^第[一二三四五六七八九]+(?:章|部分)\s*[\u4e00-\u9fff]+|评标办法前附表|投标人须知',
                re.MULTILINE
            )
            start_page = None
            end_page = None
            # 从章节开始后的位置进行检查
            for i, page in enumerate(pdf_document.pages[last_begin_index:], start=last_begin_index):
                text = page.extract_text()
                if text:
                    cleaned_text = clean_page_content(text, common_header)
                    # 确定起始页，需在last_begin_index之后
                    if "资格审查" in cleaned_text or "资质条件" in cleaned_text:     #当页包含这些内容可以认为是'资格审查资料部分'
                        if re.search(begin_pattern, cleaned_text, re.MULTILINE):
                            if start_page is None:
                                start_page = i  # 确保起始页不小于章节的开始页码
                    # 确定结束页
                    if start_page is not None and re.search(end_pattern, cleaned_text):
                        if i > start_page:
                            end_page = i
                            break  # 找到结束页后退出循环

            if start_page is None or end_page is None:
                print(f"{output_suffix} twice: 未找到起始或结束页在文件 {pdf_path} 中！")
                return []
            else:
                return [save_pages_to_new_pdf(pdf_path, output_folder, output_suffix, start_page, end_page, common_header)]
        elif output_suffix == "invalid":
            pdf_document = PdfReader(pdf_path)
            total_pages = len(pdf_document.pages)
            # 计算总页数的三分之二
            total = int(total_pages * 2 / 3)
            start_page = last_begin_index
            end_page = min(90, total)
            return [save_pages_to_new_pdf(pdf_path, output_folder, output_suffix, start_page, end_page, common_header)]
        else:
            print(f"{output_suffix} twice: 未定义的输出后缀。")
            return []
    except Exception as e:
        print(f"Error in extract_pages_twice: {e}")
        return []

def merge_selected_pdfs(output_folder, truncate_files, output_path, base_file_name):
    """
    合并 output_folder 中以 {base_file_name}_before.pdf 结尾的 PDF 文件，
    以及 truncate_files 中以指定后缀结尾的文件，按照指定顺序合并。

    参数：
    - output_folder (str): 包含以 {base_file_name}_before.pdf 结尾的 PDF 文件的文件夹路径。
    - truncate_files (list): 包含 PDF 文件路径的列表。
    - output_path (str): 合并后的 PDF 文件保存路径。
    - base_file_name (str): 用于匹配文件名的基础名称。

    返回:
    - str: 合并后的 PDF 文件路径，如果没有合并则返回 ""。
    """
    # 1. 获取 output_folder 中所有文件
    try:
        all_output_files = os.listdir(output_folder)
    except FileNotFoundError:
        print(f"输出文件夹 '{output_folder}' 未找到。")
        return ""
    except PermissionError:
        print(f"没有权限访问输出文件夹 '{output_folder}'。")
        return ""

    # 2. 定义要选择的文件后缀及合并顺序，包括 before 文件
    desired_suffixes = [
        f'{base_file_name}_before.pdf',
        f'{base_file_name}_notice.pdf',
        f'{base_file_name}_tobidders_notice_table.pdf'
    ]

    all_pdfs_to_merge = []

    for suffix in desired_suffixes:
        if suffix == f'{base_file_name}_before.pdf':
            # 从 output_folder 中选择以 {base_file_name}_before.pdf 结尾的文件
            matching_files = [
                os.path.join(output_folder, f)
                for f in all_output_files
                if f.endswith(suffix)
            ]
        else:
            # 从 truncate_files 中选择以指定后缀结尾的文件
            matching_files = [f for f in truncate_files if f.endswith(suffix)]

        if matching_files:
            # 如果找到多个匹配的文件，按名称排序并添加
            matching_files_sorted = sorted(matching_files)
            all_pdfs_to_merge.extend(matching_files_sorted)
            for f in matching_files_sorted:
                print(f"选中文件: {f}")
        else:
            print(f"没有找到以 '{suffix}' 结尾的文件。")

    print(f"总共将要合并的 PDF 文件数量: {len(all_pdfs_to_merge)}")

    if not all_pdfs_to_merge:
        print("没有找到要合并的 PDF 文件。")
        return ""

    # 过滤掉不存在或为空的文件路径
    all_pdfs_to_merge = [f for f in all_pdfs_to_merge if os.path.isfile(f)]

    if not all_pdfs_to_merge:
        print("没有有效的 PDF 文件需要合并。")
        return ""

    # 调用 merge_pdfs 函数进行合并
    try:
        merge_pdfs(all_pdfs_to_merge, output_path)
        print(f"已成功合并 PDF 文件到 '{output_path}'。")
        return output_path
    except Exception as e:
        print(f"合并 PDF 文件时出错: {e}")
        return ""

def truncate_pdf_multiple(input_path, output_folder, unique_id="123"):
    global logger
    logger = get_global_logger(unique_id)
    base_file_name = os.path.splitext(os.path.basename(input_path))[0]  # 纯文件名
    truncate_files = []
    selections = range(1, 6)  # 选择 1 到 5

    # 使用 ThreadPoolExecutor 进行多线程处理
    with concurrent.futures.ThreadPoolExecutor(max_workers=len(selections)) as executor:
        # 提交所有任务并保持 selection 顺序
        future_to_selection = {selection: executor.submit(truncate_pdf_main, input_path, output_folder, selection) for selection in selections}

        # 按 selection 顺序收集结果
        for selection in selections:
            future = future_to_selection.get(selection)
            try:
                files = future.result()
                if files and any(f for f in files):
                    # 过滤空字符串
                    valid_files = [f for f in files if f]
                    truncate_files.extend(valid_files)
                else:
                    logger.error(f"Selection {selection}: 截取失败，已添加空字符串。")
                    # Append two empty strings for selection=1; otherwise, one empty string
                    truncate_files.extend(["", ""] if selection == 1 else [""])
            except Exception as e:
                logger.error(f"Selection {selection} 生成了一个异常: {e}")
                # Append two empty strings for selection=1; otherwise, one empty string
                truncate_files.extend(["", ""] if selection == 1 else [""])

    # Proceed with merging logic as before...
    if any(f for f in truncate_files if f):  # 检查是否有有效的文件路径
        merged_output_path = os.path.join(output_folder, f"{base_file_name}_merged_baseinfo.pdf")
        merged_result = merge_selected_pdfs(output_folder, truncate_files, merged_output_path, base_file_name)
        if merged_result:
            truncate_files.append(merged_result)
            logger.info(f"merged_baseinfo: 已生成合并文件: {merged_output_path}")
        else:
            truncate_files.append("")  # 如果 merged_result 未生成，添加空字符串
            logger.warning("merged_baseinfo: 未生成合并文件，因为没有找到需要合并的 PDF 文件。")
    else:
        truncate_files.append("")  # 如果没有文件需要合并，也添加空字符串
        logger.warning(f"merged_baseinfo: 没有文件需要合并 for {input_path}")

    return truncate_files


def truncate_pdf_specific_engineering(pdf_path, output_folder, selections, unique_id="123"):
    try:
        global logger
        logger = get_global_logger(unique_id)
        base_file_name = os.path.splitext(os.path.basename(pdf_path))[0]
        truncate_files = []

        # 使用 ThreadPoolExecutor 进行多线程处理
        with concurrent.futures.ThreadPoolExecutor(max_workers=len(selections)) as executor:
            # 提交所有任务并保持 selection 顺序
            future_to_selection = {selection: executor.submit(truncate_pdf_main, pdf_path, output_folder, selection) for selection in selections}

            # 按 selection 顺序收集结果
            for selection in selections:
                future = future_to_selection.get(selection)
                try:
                    files = future.result()
                    if files and any(f for f in files):
                        # 过滤空字符串
                        valid_files = [f for f in files if f]
                        truncate_files.extend(valid_files)
                    else:
                        logger.error(f"Selection {selection}: 截取失败，已添加空字符串。")
                        # Append two empty strings for selection=1; otherwise, one empty string
                        truncate_files.extend(["", ""] if selection == 1 else [""])
                except Exception as e:
                    logger.error(f"Selection {selection} 生成了一个异常: {e}")
                    # Append two empty strings for selection=1; otherwise, one empty string
                    truncate_files.extend(["", ""] if selection == 1 else [""])

        # Proceed with merging logic as before...
        if any(f for f in truncate_files if f):  # 检查是否有有效的文件路径
            merged_output_path = os.path.join(output_folder, f"{base_file_name}_merged_specific.pdf")
            merged_result = merge_selected_pdfs(output_folder, truncate_files, merged_output_path, base_file_name)
            if merged_result:
                truncate_files.append(merged_result)
                logger.info(f"merged_specific: 已生成合并文件: {merged_output_path}")
            else:
                truncate_files.append("")  # 如果 merged_result 未生成，添加空字符串
                logger.warning("merged_specific: 未生成合并文件，因为没有找到需要合并的 PDF 文件。")
        else:
            truncate_files.append("")  # 如果没有文件需要合并，也添加空字符串
            logger.warning(f"merged_specific: 没有文件需要合并 for {pdf_path}")

        return truncate_files

    except Exception as e:
        logger.error(f"Error in truncate_pdf_specific_engineering: {e}")
        return [""] * len(selections)  # 返回与 selections 数量相同的空字符串列表


# TODO:需要完善二次请求。目前invalid一定能返回 前附表  须知正文如果为空的话要额外处理一下，比如说就不进行跳转（见xx表） 开评定标这里也要考虑  如果评分表为空，也要处理。
#TODO:zbtest8 zbtest18有问题  后期需要完善，截取需要截两次，第一次严格第二次宽松
#TODO:目前merged_baseinfo没有包含投标人须知正文。
#投标人须知前附表改为货物标一样的
if __name__ == "__main__":
    input_path = "C:\\Users\\Administrator\\Desktop\\招标文件\\招标test文件夹\\zbtest8.pdf"  # 可以是单个PDF文件路径或文件夹路径  #zbtest20.pdf zbtest4_evaluation_method.pdf zbtest8.pdf
    # input_path="C:\\Users\\Administrator\\Desktop\\fsdownload\\68549b0b-e892-41a9-897c-c3694535ee61\\ztbfile.pdf"
    # input_path = "C:\\Users\\Administrator\\Desktop\\货物标\\zbfiles\\2-招标文件.pdf"
    output_folder="C:\\Users\\Administrator\\Desktop\\招标文件\\new_test\\新建文件夹"
    # files=truncate_pdf_multiple(input_path,output_folder)
    # selections = [5, 1]  # 仅处理 selection 5、1
    # files=truncate_pdf_specific_engineering(input_path,output_folder,selections)
    # print(files)
    selection = 5 # 例如：1 - 投标人须知前附表+正文, 2 - 评标办法, 3 -资格审查条件 4-招标公告 5-无效标
    generated_files = truncate_pdf_main(input_path, output_folder, selection)
    print(generated_files)
    # print("生成的文件:", generated_files)