tools.py

import os
import base64
import requests
import tempfile
import pandas as pd
from openai import OpenAI
from pytubefix import YouTube
from langchain_community.tools import tool
from bs4 import BeautifulSoup, ResultSet, PageElement, Tag, NavigableString

@tool
def default_file_reader(file_path: str) -> str | None:
    """
        Default file reader tool that opens a file as a text reads it content and return it as a string.
        Use this default tool if there is no specific file reader for a given file.
    """

    try:
        with open(file_path, 'r') as file:
            return file.read()
    except FileNotFoundError as e:
        print(f"Error:{e}")
        return None


@tool
def image_reader(file_path: str) -> dict[str, str | dict[str, str]] | None:
    """
        Opens and png image and returns it's data as a dictionary.
    """

    try:
        with open(file_path, "rb") as image_file:
            image_data = base64.b64encode(image_file.read()).decode('utf-8')

        return {"type": "image_url", "image_url": {"url": f"data:image/png;base64,{image_data}"}}
    except FileNotFoundError as e:
        print(f"Error:{e}")
        return None


@tool
def excel_column_reader(file_path: str) -> str | None:
    """
        Opens an Excel file, reads the first row to get the names of the columns and return it as a string.
        Use it to find out what data is available in the Excel file.
    """

    try:
        df = pd.read_excel(file_path)
        return '    '.join(df.columns.astype(str))
    except FileNotFoundError as e:
        print(f"Error:{e}")
        return None


@tool
def excel_find_column_values_sum(file_path: str, columns: list[str]) -> None | int:
    """Opens an Excel file, find specified columns by column_name and calculates a total sum of all numeric cells of specified columns"""

    try:
        total = 0
        df = pd.read_excel(file_path)

        for column in columns:
            total += df[column].sum()

        return total
    except FileNotFoundError as e:
        print(f"Error:{e}")
        return None


@tool
def wiki_search(query: str) -> str | None:
    """
        Search wikipedia by query string and return content of the first found page.
        Also use it to get information about shows and actors.
    """

    try:
        ddg_results = []
        wiki_results = ""
        link_rows = _fetch_ddg_search_result_links(f"wikipedia {query}")
        for link_row in link_rows:
            if not 'en.wikipedia.org' in link_row.attrs['href']:
                continue

            ddg_results.append({
                'title': link_row.get_text(strip=True),
                'url': link_row.attrs['href']
            })

            wiki_results += _fetch_specific_page(link_row.attrs['href'])
            if len(ddg_results) == 1:
                break

        return wiki_results
    except requests.exceptions.RequestException as e:
        print(f"Error during request: {e}")
        return None
    except Exception as e:
        print(f"Error parsing results: {e}")
        return None


@tool
def archive_search(query: str) -> str | None:
    """
        Search archive.org by query string and return content of the first found page.
        Use this search when you need to find scientific paper or specific scientific publication detail.
    """

    try:
        ddg_results = []
        archive_results = ""
        link_rows = _fetch_ddg_search_result_links(f"archive.org {query}")
        for link_row in link_rows:
            if not 'archive.org' in link_row.attrs['href']:
                continue

            ddg_results.append({
                'title': link_row.get_text(strip=True),
                'url': link_row.attrs['href']
            })

            archive_results += _fetch_specific_page(link_row.attrs['href'])

            if len(ddg_results) == 1:
                break

        return archive_results
    except requests.exceptions.RequestException as e:
        print(f"Error during request: {e}")
        return None
    except Exception as e:
        print(f"Error parsing results: {e}")
        return None


@tool
def get_ioc_code(country_name: str) -> str | None:
    """
        Accepts country name as a string and returns IOC code of this country.
    """

    try:
        ioc_df = pd.read_html('https://en.wikipedia.org/wiki/List_of_IOC_country_codes')[0]
        ioc_df['Code'] = ioc_df['Code'].str[-3:]
        name_to_code = dict(zip(ioc_df['National Olympic Committee'], ioc_df['Code']))

        return name_to_code.get(country_name)
    except Exception as e:
        print(f"Error: {e}")
        return None

@tool
def check_commutativity(table_definition: str) -> str | None:
    """
        Use this tool if you need to verify whether a binary operation defined by a table is commutative.
        Returns dictionary with two fields: "is_commutative"(boolean) and
        "counter_example_elements" list of elements that violates x∗y=y∗x that prove * is not commutative
        Example of table definition:
        |*|a|b|c|d|e|
        |---|---|---|---|---|---|
        |a|a|b|c|b|d|
        |b|b|c|a|e|c|
        |c|c|a|b|b|a|
        |d|b|e|b|e|d|
        |e|d|b|a|d|c|
    """
    lines = [line.strip() for line in table_definition.strip().splitlines() if
             line.strip().startswith('|') and not line.strip().startswith('|-')]

    # Parse header: skip the '*' cell
    header_cells = [cell.strip() for cell in lines[0].split('|')[1:] if cell.strip()]
    S = header_cells[1:]  # Skip the first header cell which is "*"

    operation_table = {}
    for row in lines[1:]:
        cells = [cell.strip() for cell in row.split('|')[1:] if cell.strip()]
        row_label = cells[0]
        values = cells[1:]
        if len(values) != len(S):
            raise ValueError(f"Row {row_label} does not have the correct number of entries.")
        operation_table[row_label] = dict(zip(S, values))

    counter_example_elements = set()

    for x in S:
        for y in S:
            if operation_table[x][y] != operation_table[y][x]:
                counter_example_elements.update([x, y])


    return ', '.join(sorted(counter_example_elements)) if len(counter_example_elements) > 0 else None

@tool
def audio_to_text(file_path: str) -> str | None:
    """
        Transcribes audio file to text and returns text as a string.
    """
    try:
        client = OpenAI()
        audio_file = open(file_path, "rb")

        transcription = client.audio.transcriptions.create(
            model="gpt-4o-transcribe",
            file=audio_file
        )

        return transcription.text
    except Exception as e:
        print(f"Error: {e}")
        return None

@tool
def video_to_text(video_url: str) -> str | None:
    """
        Downloads YouTube video by url, transcribes it to text and returns text as a string.
    """
    file_path = ""
    try:
        ytx = YouTube(video_url)
        temp_dir = tempfile.gettempdir()
        ysx = ytx.streams.get_highest_resolution()
        file_path = ysx.download(output_path=temp_dir)

        client = OpenAI()
        video_file = open(file_path, "rb")

        transcription = client.audio.transcriptions.create(
            model="gpt-4o-transcribe",
            file=video_file,
            temperature=0.0,
            prompt="Ignore music playing in the background and transcribe all conversations."
        )

        return transcription.text
    except FileNotFoundError:
        print(f"Error: File {file_path} was not found.")
        return None
    except Exception as e:
        print(f"Error: {e}")
        return None


def _fetch_ddg_search_result_links(query: str) -> ResultSet[PageElement | Tag | NavigableString]:
    url = "https://lite.duckduckgo.com/lite/"

    headers = {
        'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.124 Safari/537.36',
        'Accept': 'text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8',
        'Accept-Language': 'en-US,en;q=0.5',
    }

    params = {
        'q': query,
        'kl': 'us-en'
    }

    ddg_response = requests.get(url, headers=headers, params=params)
    ddg_response.raise_for_status()

    soup = BeautifulSoup(ddg_response.text, 'html.parser')
    return soup.find_all('a', {'class': 'result-link'})


def _fetch_specific_page(url: str) -> str:
    headers = {
        'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.124 Safari/537.36',
        'Accept': 'text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8',
        'Accept-Language': 'en-US,en;q=0.5',
    }

    wiki_response = requests.get(url, headers=headers)
    wiki_response.raise_for_status()

    soup = BeautifulSoup(wiki_response.text, 'html.parser')
    return soup.get_text()