sqlalchemy event listen Automatic generate CRUD excel

import re
from sqlalchemy import event, MetaData, create_engine
from openpyxl import load_workbook
from openpyxl.utils import get_column_letter
from openpyxl.styles import Alignment
from openpyxl.styles.borders import Border, Side, BORDER_THIN
import models

def receive_after_cursor_execute(conn, cursor, statement, parameters, context, executemany):
    if not hasattr(common.thread_local, 'current_request'):
        return
    print("request:{}\r\nendpoint:{}\r\napi_url:{} {}\r\nstatement:{}\r\n".format(common.thread_local.current_request, common.thread_local.current_request.endpoint, common.thread_local.current_request.path, common.thread_local.current_request.method, statement))
    print("\r\n")
    innert_table_columns_to_excel(common.thread_local.current_request.endpoint, "{} {}".format(common.thread_local.current_request.path, common.thread_local.current_request.method), statement)

@app.before_request
def before_request():
    common.thread_local.current_request = request
    event.listen(models.engine, "after_cursor_execute", receive_after_cursor_execute)

@app.after_request
def after_request(response):
    if event.contains(models.engine, "after_cursor_execute", receive_after_cursor_execute):
        event.remove(models.engine, "after_cursor_execute", receive_after_cursor_execute)
        
schema = "public"
engine = create_engine(
    'postgresql://{db user name}:{password}@{host}:{port}/{db name}',
    pool_size=5,
    max_overflow=10,
    connect_args={
    'options': '-c search_path={}'.format(schema)}
)


def innert_table_columns_to_excel(endpoint, api_url, statement):
    thin_border = Border(
        left=Side(border_style=BORDER_THIN, color='00000000'),
        right=Side(border_style=BORDER_THIN, color='00000000'),
        top=Side(border_style=BORDER_THIN, color='00000000'),
        bottom=Side(border_style=BORDER_THIN, color='00000000')
    )

    work_book = load_workbook(filename='D:/CRUD.xlsx')
    sheet = work_book['Sheet1']
    meta = MetaData()
    meta.reflect(bind=engine)

    # Begin of table names: (6, 9) -> I6
    table_name_col_begin = 9
    table_name_row_begin = 6
    # Begin of table columns: (7, 9) -> I7
    column_name_col_begin = 9
    column_name_row_begin = 7
    object_table_list = ["table_name1", "table_name2"]

    endpoint_col_begin = 2

    api_col_begin = 3
    api_row_begin = 8
    api_list = [
        {
    "url": "/ GET", "endpoint": "login"},
        {
    "url": "/login GET", "endpoint": "login"},
        {
    "url": "/login POST", "endpoint": "login"}
    ]

    select_table_columns = []
    insert_table_columns = {
    "table_name": None, "column_names": []}
    update_table_columns = {
    "table_name": None, "column_names": []}
    delete_table_columns = {
    "table_name": None, "column_names": []}

    if statement.startswith("SELECT "):
        select_pattern = re.compile('(\\s([a-z_]{1,})\\.\\"?([a-z_]{1,})\\"?\\sAS\\s([a-z_1-9]{1,})[,\\s])')
        table_column_matches = select_pattern.findall(statement)
        if not table_column_matches:
            select_pattern = re.compile('(\\spublic.([a-z_]{1,})\\.\\"?([a-z_]{1,})\\"?\\sAS\\s([a-z_1-9]{1,})[,\\s])')
            table_column_matches = select_pattern.findall(statement)
        for table_column_match in table_column_matches:
            found_by_table_name = next(filter(lambda item: "table_name" in item and item["table_name"] == table_column_match[1], select_table_columns), None)
            if found_by_table_name:
                found_by_table_name["column_names"].append(table_column_match[2])
            else:
                select_table_columns.append({
    "table_name": table_column_match[1], "column_names": [table_column_match[2]]})
            print("table_name:{}, column_name:{}".format(table_column_match[1], table_column_match[2]))

    if statement.startswith("INSERT INTO"):
        insert_pattern = re.compile('INSERT\\sINTO\\s([a-z_]{1,})\\s\\(([a-z_\\,\\s\\"]{1,})\\)\\sVALUES\\s')
        matches = insert_pattern.findall(statement)
        if not matches:
            insert_pattern = re.compile('INSERT\\sINTO\\spublic.([a-z_]{1,})\\s\\(([a-z_\\,\\s\\"]{1,})\\)\\sVALUES\\s')
            matches = insert_pattern.findall(statement)
        for match in matches:
            insert_table_columns.update({
    "table_name": match[0]})
            print("table_name:{}, column_names:{}".format(match[0], match[1]))
            columns = match[1].split(",")
            for column in columns:
                replaced_column = column.replace("\"", "")
                insert_table_columns["column_names"].append(replaced_column.strip())
                print(replaced_column.strip())

    if statement.startswith("UPDATE "):
        update_pattern = re.compile('UPDATE\\s([a-z_]{1,})\\sSET\\s([a-z_\\=\\%\\(\\)\\,\\s\\"]{1,})\\s')
        matches = update_pattern.findall(statement)
        if not matches:
            update_pattern = re.compile('UPDATE\\spublic.([a-z_]{1,})\\sSET\\s([a-z_\\=\\%\\(\\)\\,\\s\\"]{1,})\\s')
            matches = update_pattern.findall(statement)
        for match in matches:
            update_table_columns.update({
    "table_name": match[0]})
            print("table_name:{}".format(match[0]))
            column_pattern = re.compile('([a-z_]{1,})=')
            column_matches = column_pattern.findall(match[1])
            print("column_names:")
            for column in column_matches:
                replaced_column = column.replace("\"", "")
                update_table_columns["column_names"].append(replaced_column)
                print(replaced_column)

    if statement.startswith("DELETE "):
        delete_pattern = re.compile('DELETE\\sFROM\\s([a-z_]{1,})\\s')
        matches = delete_pattern.findall(statement)
        if not matches:
            delete_pattern = re.compile('DELETE\\sFROM\\spublic.([a-z_]{1,})\\s')
            matches = delete_pattern.findall(statement)
        for match in matches:
            delete_table_columns.update({
    "table_name": match})
            print("table name:{}".format(match))

    found_row = False
    for api in api_list:
        current_cell = sheet.cell(row=api_row_begin, column=api_col_begin)
        current_cell.border = thin_border
        current_cell.alignment = Alignment(horizontal='left', vertical='center')
        api_begin_position = current_cell.coordinate
        api_end_position = get_column_letter(api_col_begin + 5) + str(api_row_begin)
        sheet[api_begin_position].value = api["url"]

        merge_range = api_begin_position + ":" + api_end_position
        sheet.merge_cells(merge_range)  # Set merge on a cell range. Range is a cell range (e.g. A1:E1)

        current_cell = sheet.cell(row=api_row_begin, column=endpoint_col_begin)
        current_cell.value = api["endpoint"]

        found_row = True if api["url"] == api_url and api["endpoint"] == endpoint else False
        found_row_for_login = True if api["endpoint"] != "login" and api["endpoint"] == endpoint else False
        found_row = found_row_for_login or found_row

        column_offset = 0
        sheet.row_dimensions[column_name_row_begin].height = 120
        for table_name in meta.tables:
            if table_name not in object_table_list:
                continue
            current_cell = sheet.cell(row=table_name_row_begin, column=table_name_col_begin + column_offset)
            current_cell.border = thin_border
            current_cell.alignment = Alignment(horizontal='center', vertical='center')
            table_begin_position = current_cell.coordinate
            sheet[table_begin_position].value = table_name

            column_list = [item for item in meta.tables[table_name].columns]
            table_end_position = get_column_letter(table_name_col_begin + column_offset + len(column_list) - 1) + str(table_name_row_begin)
            merge_range = table_begin_position + ":" + table_end_position
            sheet.merge_cells(merge_range)  # Set merge on a cell range. Range is a cell range (e.g. A1:E1)

            for column in column_list:
                current_cell = sheet.cell(row=column_name_row_begin, column=column_name_col_begin + column_offset)
                sheet.column_dimensions[get_column_letter(column_name_col_begin + column_offset)].width = 5
                current_cell.border = thin_border
                current_cell.alignment = Alignment(textRotation=90, horizontal='center', vertical='center')
                sheet[current_cell.coordinate].value = column.name

                current_cell_detail = sheet.cell(row=api_row_begin, column=column_name_col_begin + column_offset)
                current_cell_detail.border = thin_border

                curd_symbol = ""
                if delete_table_columns["table_name"] == table_name and found_row:
                    curd_symbol = "D"

                found_by_table_name = next(filter(lambda item: "table_name" in item and item["table_name"] == table_name, select_table_columns), None)
                if found_by_table_name and found_row and column.name in found_by_table_name["column_names"]:
                    curd_symbol = "R"

                if insert_table_columns["table_name"] == table_name and found_row and column.name in insert_table_columns["column_names"]:
                    curd_symbol = "C"

                if update_table_columns["table_name"] == table_name and found_row and column.name in update_table_columns["column_names"]:
                    curd_symbol = "U"

                sheet[current_cell_detail.coordinate].value = curd_symbol if sheet[current_cell_detail.coordinate].value is None else sheet[current_cell_detail.coordinate].value + curd_symbol if curd_symbol not in sheet[current_cell_detail.coordinate].value else sheet[current_cell_detail.coordinate].value
                ordered_symbol_list = ["C", "R", "U", "D"]
                ordered_symbol_result = ""
                for symbol in ordered_symbol_list:
                    if symbol in sheet[current_cell_detail.coordinate].value:
                        ordered_symbol_result += symbol
                sheet[current_cell_detail.coordinate].value = ordered_symbol_result


                column_offset = column_offset + 1

        api_row_begin = api_row_begin + 1

    work_book.save(filename='D:/CRUD.xlsx')


if __name__ == '__main__':
	app.run(host='0.0.0.0', port=8080, threaded=True)