zbparse/flask_app/货物标/截取pdf货物标版.py

import logging

from PyPDF2 import PdfReader, PdfWriter
import re  # 导入正则表达式库
import os  # 用于文件和文件夹操作
from flask_app.general.format_change import docx2pdf
from flask_app.general.merge_pdfs import merge_and_cleanup,merge_pdfs
import concurrent.futures
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


# PYPDF2版本
def extract_common_header(pdf_path):
    from PyPDF2 import PdfReader

    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)




# fitz库版本
# def extract_common_header(pdf_path):
#     doc = fitz.open(pdf_path)
#     headers = []
#     total_pages = len(doc)
#
#     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 = doc[i]
#         text = page.get_text()
#         if text:
#             first_lines = text.strip().split('\n')[:3]
#             headers.append(first_lines)
#
#     doc.close()
#
#     if len(headers) < 2:
#         return ""
#
#     common_headers = []
#     for lines in zip(*headers):
#         common_line = set(lines[0].split()).intersection(*[set(line.split()) for line in lines[1:]])
#         if common_line:
#             common_headers.append(' '.join(common_line))
#
#     return '\n'.join(common_headers)

def is_pdf_or_doc(filename):
    # 判断文件是否为PDF或Word文档
    return filename.lower().endswith(('.pdf', '.doc', '.docx'))


def convert_to_pdf(file_path):
    # 假设 docx2pdf 函数已经被定义，这里仅根据文件扩展名来决定是否需要转换
    if file_path.lower().endswith(('.doc', '.docx')):
        return docx2pdf(file_path)
    return file_path

def process_files(file_path, output_folder, begin_pattern, begin_page, end_pattern, output_suffix):
    pdf_path = convert_to_pdf(file_path)
    result = extract_pages(pdf_path, output_folder, begin_pattern, begin_page, end_pattern, output_suffix)
    if result:
        if output_suffix == "tobidders_notice":
            # 确保返回的是元组，并将其中的 None 转换为 ""
            path1, path2 = result
            return (path1 or "", path2 or "")
        elif output_suffix == "qualification1":
            merge_and_cleanup(result, "qualification3")
            return result or ""
        return result or ""
    return ""  # 返回空字符串


def process_input(input_path, output_folder, begin_pattern, begin_page, end_pattern, output_suffix):
    if not os.path.exists(output_folder):
        os.makedirs(output_folder)
    generated_files = []

    if os.path.isdir(input_path):
        for file_name in os.listdir(input_path):
            file_path = os.path.join(input_path, file_name)
            if is_pdf_or_doc(file_path):
                result = process_files(file_path, output_folder, begin_pattern, begin_page, end_pattern, output_suffix)
                if isinstance(result, tuple):
                    generated_files.extend([f if f else "" for f in result])  # 保留空字符串
                else:
                    generated_files.append(result)  # 直接添加result，可能是空字符串
    elif os.path.isfile(input_path) and is_pdf_or_doc(input_path):
        result = process_files(input_path, output_folder, begin_pattern, begin_page, end_pattern, output_suffix)
        if isinstance(result, tuple):
            generated_files.extend([f if f else "" for f in result])  # 保留空字符串
        else:
            generated_files.append(result)  # 直接添加result，可能是空字符串
    else:
        print("提供的路径既不是文件夹也不是PDF文件。")

    return generated_files

# 默认逻辑是start_page匹配上就不再设置了，一般不匹配上目录的原因是设置了begin_page=5，但是匹配'第一章 招标公告'的时候start_page可能会错误匹配到目录。
def extract_pages_generic(pdf_document, begin_pattern, end_pattern, begin_page, common_header, exclusion_pattern=None,
                          output_suffix="normal"):
    start_page = None
    end_page = None
    for i, page in enumerate(pdf_document.pages):
        text = page.extract_text() or ""
        cleaned_text = clean_page_content(text, common_header)
        if output_suffix == "tobidders_notice":
            if exclusion_pattern and re.search(exclusion_pattern, cleaned_text) and start_page is not None:
                continue
        else:
            if exclusion_pattern and re.search(exclusion_pattern, cleaned_text):
                continue
        if output_suffix == "notice":
            if re.search(begin_pattern, cleaned_text) and i > begin_page:
                start_page = i
        else:
            if start_page is None and re.search(begin_pattern, cleaned_text) and i > begin_page:
                start_page = i
        if start_page is not None and re.search(end_pattern, cleaned_text) and i > start_page:
            end_page = i
            break
    return start_page, end_page


def extract_pages(pdf_path, output_folder, begin_pattern, begin_page, end_pattern, output_suffix):
    try:
        common_header = extract_common_header(pdf_path)
        pdf_document = PdfReader(pdf_path)
        exclusion_pattern = None
        total_pages = len(pdf_document.pages) - 1  # 获取总页数

        if output_suffix == "tobidders_notice":
            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')
            start_page, mid_page, end_page = extract_pages_tobidders_notice(
                pdf_document, begin_pattern, begin_page, common_header, exclusion_pattern
            )

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

            path1 = save_extracted_pages(pdf_document, start_page, mid_page, pdf_path, output_folder, "tobidders_notice_part1")
            path2 = save_extracted_pages(pdf_document, mid_page, end_page, pdf_path, output_folder, "tobidders_notice_part2")
            return path1, path2

        else:
            # 原有的处理逻辑保持不变
            if output_suffix == "qualification1":
                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')
            start_page, end_page = extract_pages_generic(pdf_document, begin_pattern, end_pattern, begin_page, common_header, exclusion_pattern, output_suffix)
            # 针对 selection = 6 的特殊处理
            if output_suffix == "format":
                if start_page is None:
                    print(f"{output_suffix}: 未找到起始页，提取失败！")
                    return ""
                if end_page is None:
                    # 如果未匹配到结束页，默认截取到文件末尾
                    end_page = total_pages
                    print(f"{output_suffix}: 未找到结束页，默认截取到文件末尾。")
                return save_extracted_pages(pdf_document, start_page, end_page, pdf_path, output_folder, output_suffix)
            if start_page is None or end_page is None:
                print(f"first: {output_suffix} 未找到起始或结束页在文件 {pdf_path} 中！尝试备用提取策略。")
                return extract_pages_twice(pdf_path, output_folder, output_suffix, common_header)
            elif output_suffix == "qualification1":
                truncate_pdf_main(pdf_path, output_folder, 2, "qualification3")  # 合并'资格审查'章节和'评标办法'章节
            return save_extracted_pages(pdf_document, start_page, end_page, pdf_path, output_folder, output_suffix)
    except Exception as e:
        print(f"Error processing {pdf_path}: {e}")
        return ""


def get_patterns_for_procurement():
    begin_pattern = re.compile(
        r'^第[一二三四五六七八九十百千]+(?:章|部分).*?(?:服务|项目|商务).*?要求|'
        r'^第[一二三四五六七八九十百千]+(?:章|部分).*?(?:采购|技术标准).*|'
        r'^[一二三四五六七八九十百千]+、\s*采购清单', re.MULTILINE)
    end_pattern = re.compile(
        r'^第[一二三四五六七八九十百千]+(?:章|部分)\s*[\u4e00-\u9fff]+', re.MULTILINE)
    return begin_pattern, end_pattern


def get_patterns_for_evaluation_method():
    begin_pattern = re.compile(
        r'^第[一二三四五六七八九十百千]+(?:章|部分).*?(磋商|谈判|评标|评定|评审)(方法|办法).*', re.MULTILINE)
    end_pattern = re.compile(
        r'^第[一二三四五六七八九十百千]+(?:章|部分)\s*[\u4e00-\u9fff]+', re.MULTILINE)
    return begin_pattern, end_pattern


def get_patterns_for_qualification():
    # # 原始匹配逻辑
    # begin_pattern_original = re.compile(
    #     r'^第[一二三四五六七八九十百千]+(?:章|部分).*?(资格审查).*', re.MULTILINE)
    # end_pattern_original = re.compile(
    #     r'^第[一二三四五六七八九十百千]+(?:章|部分)\s*[\u4e00-\u9fff]+', re.MULTILINE)

    # 新匹配逻辑
    begin_pattern_new = re.compile(
        r'^资格性检查', re.MULTILINE)
    end_pattern_new = re.compile(
        r'^附件\s*\d+|^第[一二三四五六七八九十百千]+(?:章|部分)\s*[\u4e00-\u9fff]+', re.MULTILINE)

    return begin_pattern_new, end_pattern_new
def get_patterns_for_qualification2():
    begin_pattern = re.compile(
        r'^(?:附录(?:一|1)?[：:]|附件(?:一|1)?[：:]|附表(?:一|1)?[：:]).*(?:资格|符合性).*$',
        re.MULTILINE
    )
    end_pattern = re.compile(
        r'^(?!.*(?:资格|符合))(?:附录.*?[：:]|附件.*?[：:]|附表.*?[：:]).*$|'
        r'^第[一二三四五六七八九十百千]+(?:章|部分)\s*[\u4e00-\u9fff]+',
        re.MULTILINE
    )
    return begin_pattern, end_pattern

def get_patterns_for_notice():
    begin_pattern = re.compile(
        r'^第[一二三四五六七八九十百千]+(?:章|部分).*?(?:公告|邀请书).*', re.MULTILINE
    )
    end_pattern = re.compile(
        # r'^(?:第[一二三四五六七八九十百千]+(?:章|部分)\s*(?:投标人须知|磋商须知|供应商须知)+|(?:一\s*、\s*)?(?:投标人须知|磋商须知|供应商须知)前附表)',
        r'^第[一二三四五六七八九十百千]+(?:章|部分)\s*[\u4e00-\u9fff]+',
        re.MULTILINE
    )
    return begin_pattern, end_pattern

# def extract_pages_tobidders_notice(pdf_document, begin_pattern, end_pattern, begin_page, common_header,
#                                    exclusion_pattern):
#     start_page = None
#     mid_page = None
#     end_page = None
#     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 and re.search(begin_pattern, cleaned_text) and i > begin_page:
#             start_page = i
#         if start_page is not None and mid_page is None and re.search(
#                 r'^\s*[（(]?\s*[一1]\s*[)）]?\s*[、．.]*\s*(说\s*明|总\s*则)', cleaned_text):
#             mid_page = i
#         if start_page is not None and mid_page is not None and re.search(end_pattern, cleaned_text) and i > mid_page:
#             end_page = i
#             break
#     return start_page, mid_page, end_page

def extract_pages_tobidders_notice(pdf_document, begin_pattern, begin_page, common_header, exclusion_pattern):
    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]+',
                            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)'

                        # 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]+',
                            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()

    return start_page, mid_page, end_page



def extract_pages_twice_tobidders_notice(pdf_path, output_folder, output_suffix, common_header):
    begin_pattern = 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)+'
    )
    end_pattern = re.compile(
        r'^第[一二三四五六七八九十百千]+(?:章|部分)\s*([\u4e00-\u9fff]+)'  # 捕获中文部分
    )
    exclusion_words = ["合同", "评标", "开标","评审","采购","资格"]  # 在这里添加需要排除的关键词

    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')

    # 提取第一部分
    start_page1, end_page1 = extract_pages_generic(pdf_document, begin_pattern, end_pattern, -1, common_header)
    if start_page1 is None or end_page1 is None:
        print(f"second: {output_suffix} 未找到起始或结束页在文件 {pdf_path} 中！")
        return "", ""

    # 保存第一部分的路径
    path1 = save_extracted_pages(pdf_document, start_page1, end_page1, pdf_path, output_folder,
                                 "tobidders_notice_part1")

    # 提取第二部分
    start_page2 = end_page1

    # 检查end_page1页面的内容
    text = pdf_document.pages[end_page1].extract_text() or ""
    cleaned_text = clean_page_content(text, common_header)
    match = end_pattern.search(cleaned_text)

    if match:
        # 获取匹配到的中文部分
        chapter_title = match.group(1)
        # 检查是否包含排除关键词
        if any(word in chapter_title for word in exclusion_words):
            # 如果包含排除关键词，直接返回相同的路径
            return path1, path1

    # 如果不包含排除关键词，继续提取第二部分
    _, end_page2 = extract_pages_generic(pdf_document, end_pattern, end_pattern, start_page2 - 1, common_header,
                                         exclusion_pattern)

    if end_page2 is None:
        print(f"second: {output_suffix} 未找到第二部分的结束页在文件 {pdf_path} 中！")
        return path1, path1

    # 保存第二部分的路径
    path2 = save_extracted_pages(pdf_document, start_page2, end_page2, pdf_path, output_folder,
                                 "tobidders_notice_part2")

    return path1, path2


def extract_pages_twice(pdf_path, output_folder, output_suffix, common_header):
    try:
        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')
        pdf_document = PdfReader(pdf_path)
        patterns = None
        begin_page = 0
        start_page = None
        end_page = None

        if output_suffix == "procurement":
            patterns = [get_patterns_for_procurement()]
            begin_page = 5
        elif output_suffix == "evaluation_method" or output_suffix == "qualification2" or output_suffix == "qualification3":
            patterns = [get_patterns_for_evaluation_method()]
            begin_page = 5
        elif output_suffix == "qualification1":
            patterns = [get_patterns_for_qualification(),get_patterns_for_qualification2()]
            begin_page = 5
        elif output_suffix == "notice":
            patterns = [get_patterns_for_notice()]
            begin_page = 0

        if patterns:
            for pattern_pair in patterns:
                # print(pattern_pair[0])
                # print(pattern_pair[1])
                start_page, end_page = extract_pages_generic(pdf_document, pattern_pair[0], pattern_pair[1], begin_page,
                                                             common_header,
                                                             exclusion_pattern, output_suffix)
                if start_page is not None and end_page is not None:
                    break

        if start_page is None or end_page is None:
            if output_suffix == "qualification1":
                print(f"second: {output_suffix} 未找到起始或结束页在文件 {pdf_path} 中！")
                print("third:尝试提取评分办法章节...")
                temp = truncate_pdf_main(pdf_path, output_folder, 2, "qualification2")
                if len(temp) > 0:
                    return temp[0]
                else:
                    return ""
            else:
                print(f"second: {output_suffix} 未找到起始或结束页在文件 {pdf_path} 中！")
                return ""
        return save_extracted_pages(pdf_document, start_page, end_page, pdf_path, output_folder, output_suffix)
    except Exception as e:
        print(f"Error in extract_pages_twice: {e}")
        return ""


# def save_extracted_pages(pdf_document, start_page, end_page, pdf_path, output_folder, output_suffix):
#     if output_suffix=='notice':
#         print(start_page)
#     base_file_name = os.path.splitext(os.path.basename(pdf_path))[0]
#     output_pdf_path = os.path.join(output_folder, f"{base_file_name}_{output_suffix}.pdf")
#     output_doc = PdfWriter()
#     for page_num in range(start_page, end_page + 1):
#         output_doc.add_page(pdf_document.pages[page_num])
#     with open(output_pdf_path, 'wb') as f:
#         output_doc.write(f)
#     print(f"{output_suffix} 已截取并保存页面从 {start_page} 到 {end_page} 为 {output_pdf_path}")
#     return output_pdf_path


def save_extracted_pages(pdf_document, start_page, end_page, pdf_path, output_folder, output_suffix):
    try:
        # 检查 start_page 和 end_page 是否为 None
        if start_page is None or end_page is None:
            print("Error: start_page 或 end_page 为 None")
            return ""

        base_file_name = os.path.splitext(os.path.basename(pdf_path))[0]
        output_pdf_path = os.path.join(output_folder, f"{base_file_name}_{output_suffix}.pdf")

        if start_page < 0 or end_page >= len(pdf_document.pages) or start_page > end_page:
            print(f"无效的页面范围: {start_page} 到 {end_page}")
            return ""

        if output_suffix == 'notice' and start_page - 1 >= 0:
            before_pdf_path = os.path.join(output_folder, f"{base_file_name}_before.pdf")
            before_doc = PdfWriter()
            for page_num in range(0, start_page):
                before_doc.add_page(pdf_document.pages[page_num])
            with open(before_pdf_path, 'wb') as f:
                before_doc.write(f)
            print(f"已保存页面从 0 到 {start_page - 1} 为 {before_pdf_path}")

        output_doc = PdfWriter()
        for page_num in range(start_page, end_page + 1):
            output_doc.add_page(pdf_document.pages[page_num])
        with open(output_pdf_path, 'wb') as f:
            output_doc.write(f)
        print(f"{output_suffix} 已截取并保存页面从 {start_page} 到 {end_page} 为 {output_pdf_path}")
        return output_pdf_path
    except Exception as e:
        print(f"Error in save_extracted_pages: {e}")
        return ""  # 返回空字符串


#合并封面+招标公告+投标人须知前附表+须知正文
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。
    - logger (logging.Logger): 日志记录器对象。

    返回:
    - str: 如果合并成功，返回 output_path；否则，返回空字符串 ""。
    """
    # 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_part1.pdf',
        f'{base_file_name}_tobidders_notice_part2.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 ""

    # 调用 merge_pdfs 函数进行合并
    merge_pdfs(all_pdfs_to_merge, output_path)
    print(f"已成功合并 PDF 文件到 '{output_path}'。")

    # 检查合并后的文件是否存在且不为空
    if os.path.exists(output_path) and os.path.getsize(output_path) > 0:
        return output_path
    else:
        print(f"合并失败，没有生成 '{output_path}'。")
        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):
        if i > 25:
            return common_header, 0  # 如果页码大于25，直接返回last_begin_index=0
        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, output_suffix="default"):
    try:
        last_begin_index = get_start_and_common_header(input_path)
        begin_page = last_begin_index if last_begin_index != 0 else {
            4: 1,  # 前附表
            2: 5,  # 评标
            3: 5,  # 资格
            1: 0,  # 公告
            5: 3  # 采购需求
        }.get(selection, 0)
        if selection == 1:    #招标公告
            begin_pattern = 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).*'
            )
            end_pattern = 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)'
                r'^第[一二三四五六七八九十百千]+(?:章|部分)\s*[\u4e00-\u9fff]+', re.MULTILINE
            )
            local_output_suffix = "notice"
        elif selection == 2:
            begin_pattern = re.compile(
                r'^第[一二三四五六七八九十百千]+(?:章|部分).*?(磋商|谈判|评标|评定|评审)(方法|办法).*'
            )
            end_pattern = re.compile(
                r'^第[一二三四五六七八九十百千]+(?:章|部分)\s*[\u4e00-\u9fff]+'
            )
            local_output_suffix = "evaluation_method"
        elif selection == 3:
            begin_pattern = re.compile(
                r'^第[一二三四五六七八九十百千]+(?:章|部分).*?(资格审查).*', re.MULTILINE
            )
            end_pattern = re.compile(
                r'^第[一二三四五六七八九十百千]+(?:章|部分)\s*[\u4e00-\u9fff]+', re.MULTILINE
            )
            local_output_suffix = "qualification1"
        elif selection == 4:  # 投标人须知前附表和正文
            begin_pattern = 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.MULTILINE
            )
            end_pattern=None
            # end_pattern = re.compile(
            #     r'^第[一二三四五六七八九十百千]+(?:章|部分)\s*[\u4e00-\u9fff]+', re.MULTILINE
            # )
            local_output_suffix = "tobidders_notice"
        elif selection == 5:   #采购需求
            # 更新的正则表达式以匹配"第x章"和"第x部分"，考虑到可能的空格和其他文字
            begin_pattern = re.compile(
                r'^第[一二三四五六七八九十百千]+(?:章|部分).*?(?:服务|项目|商务).*?要求|'
                r'^第[一二三四五六七八九十百千]+(?:章|部分).*?采购.*|'
                r'^第[一二三四五六七八九十百千]+(?:章|部分).*?需求.*'
            )
            end_pattern = re.compile(
                r'^第[一二三四五六七八九十百千]+(?:章|部分)\s*[\u4e00-\u9fff]+'
            )
            local_output_suffix = "procurement"
        elif selection==6:      #投标文件格式
            begin_pattern=re.compile(
                r'^第[一二三四五六七八九十百千]+(?:章|部分).*?(?:格式).*'
            )
            end_pattern=re.compile(
                r'^第[一二三四五六七八九十百千]+(?:章|部分)\s*[\u4e00-\u9fff]+', re.MULTILINE
            )
            local_output_suffix = "format"
        else:
            print("无效的选择:请选择1-5")
            return ['']

        # 如果传入的 output_suffix 是 'default'，则使用本地生成的 output_suffix
        if output_suffix == "default":
            output_suffix = local_output_suffix

        # 调用相应的处理函数
        return process_input(input_path, output_folder, begin_pattern, begin_page, end_pattern, output_suffix) or ""
    except Exception as e:
        print(f"Error in truncate_pdf_main: {e}")
        return ['']  # 返回空字符串


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

    # 定义要处理的选择范围
    selections = range(1, 6)

    # 使用 ThreadPoolExecutor 进行多线程处理
    with concurrent.futures.ThreadPoolExecutor(max_workers=5) 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, output_suffix="default")
            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:
                    truncate_files.extend(files)
            except Exception as e:
                logger.error(f"Selection {selection} 生成了一个异常: {e}")

    # 定义合并后的输出路径
    merged_output_path = os.path.join(output_folder, f"{base_file_name}_merged_baseinfo.pdf")
    # 调用 merge_selected_pdfs 并获取返回值
    merged_path = merge_selected_pdfs(output_folder, truncate_files, merged_output_path, base_file_name)
    if merged_path:
        # 合并成功，添加合并后的文件路径
        truncate_files.append(merged_path)
        logger.info(f"已生成合并文件: {merged_output_path}")
    else:
        # 合并失败，添加空字符串
        truncate_files.append("")
        logger.warning(f"合并失败，没有生成合并文件 for {pdf_path}")
    return truncate_files

#小解析，只需要前三章内容
def truncate_pdf_specific_goods(pdf_path, output_folder, selections,unique_id="123"):
    """
    处理 PDF 文件，选择指定的 selections，并合并结果。

    Args:
        pdf_path (str): 要处理的 PDF 文件路径。
        output_folder (str): 截取后的文件保存文件夹路径。
        selections (iterable): 要处理的 selection 列表。

    Returns:
        list: 截取的文件路径列表，包括合并后的文件路径（如果有）。
    """
    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, output_suffix="default") 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:
                    if isinstance(files, list):
                        truncate_files.extend(files)
                    elif isinstance(files, str):
                        truncate_files.append(files)
            except Exception as e:
                logger.error(f"Selection {selection} 生成了一个异常: {e}")

    # 定义合并后的输出路径
    merged_output_path = os.path.join(output_folder, f"{base_file_name}_merged_baseinfo.pdf")
    # 调用 merge_selected_pdfs 并获取返回值
    merged_path = merge_selected_pdfs(output_folder, truncate_files, merged_output_path, base_file_name)
    if merged_path:
        # 合并成功，添加合并后的文件路径
        truncate_files.append(merged_path)
        logger.info(f"已生成合并文件: {merged_output_path}")
    else:
        # 合并失败，添加空字符串
        truncate_files.append("")
        logger.warning(f"合并失败，没有生成合并文件 for {pdf_path}")

    return truncate_files


# TODO:交通智能系统和招标(1)(1)文件有问题  包头 绍兴    资格审查文件可能不需要默认与"evaluation"同一章  无效投标可能也要考虑 “more”的情况，类似工程标
if __name__ == "__main__":
    # input_path = "C:\\Users\\Administrator\\Desktop\\货物标\\zbfiles\\zbtest4_evaluation_method.pdf"
    # input_path = "C:\\Users\\Administrator\\Desktop\\fsdownload\\b151fcd0-4cd8-49b4-8de3-964057a9e653\\ztbfile.pdf"
    input_path="C:\\Users\\Administrator\\Desktop\\货物标\\zbfiles"
    # input_path = "C:\\Users\\Administrator\\Desktop\\货物标\\output1\\2-招标文件_procurement.pdf"
    # input_path="C:\\Users\\Administrator\\Desktop\\fsdownload\\a091d107-805d-4e28-b8b2-0c7327737238\\ztbfile.pdf"
    # output_folder = "C:\\Users\\Administrator\\Desktop\\fsdownload\\a091d107-805d-4e28-b8b2-0c7327737238\\tmp"
    output_folder="C:\\Users\\Administrator\\Desktop\\货物标\\zbfiles\\新建文件夹"
    # files = truncate_pdf_multiple(input_path, output_folder)
    # selections = [1,4]
    # files=truncate_pdf_specific_goods(input_path,output_folder,selections)
    # print(files)
    selection = 4# 例如：1 - 商务技术服务要求, 2 - 评标办法, 3 - 资格审查后缀有qualification1或qualification2（与评标办法一致）  4.投标人须知前附表part1 投标人须知正文part2   5-公告
    generated_files = truncate_pdf_main(input_path, output_folder, selection)
    # print(generated_files)