deep_translator/papago.py

"""
papago translator API
"""

__copyright__ = "Copyright (C) 2020 Nidhal Baccouri"

import json
from typing import List, Optional

import requests

from deep_translator.base import BaseTranslator
from deep_translator.constants import BASE_URLS, PAPAGO_LANGUAGE_TO_CODE
from deep_translator.exceptions import TranslationNotFound
from deep_translator.validate import is_input_valid


class PapagoTranslator(BaseTranslator):
    """
    class that wraps functions, which use google translate under the hood to translate text(s)
    """

    def __init__(
        self,
        client_id: Optional[str] = None,
        secret_key: Optional[str] = None,
        source: str = "auto",
        target: str = "en",
        **kwargs,
    ):
        """
        @param source: source language to translate from
        @param target: target language to translate to
        """
        if not client_id or not secret_key:
            raise Exception(
                "Please pass your client id and secret key! visit the papago website for more infos"
            )

        self.client_id = client_id
        self.secret_key = secret_key
        super().__init__(
            base_url=BASE_URLS.get("PAPAGO_API"),
            source=source,
            target=target,
            languages=PAPAGO_LANGUAGE_TO_CODE,
            **kwargs,
        )

    def translate(self, text: str, **kwargs) -> str:
        """
        function that uses google translate to translate a text
        @param text: desired text to translate
        @return: str: translated text
        """
        if is_input_valid(text):
            payload = {
                "source": self._source,
                "target": self._target,
                "text": text,
            }
            headers = {
                "X-Naver-Client-Id": self.client_id,
                "X-Naver-Client-Secret": self.secret_key,
                "Content-Type": "application/x-www-form-urlencoded; charset=UTF-8",
            }
            response = requests.post(
                self._base_url, headers=headers, data=payload
            )
            if response.status_code != 200:
                raise Exception(
                    f"Translation error! -> status code: {response.status_code}"
                )
            res_body = json.loads(response.text)
            if "message" not in res_body:
                raise TranslationNotFound(text)

            msg = res_body.get("message")
            result = msg.get("result", None)
            if not result:
                raise TranslationNotFound(text)
            translated_text = result.get("translatedText")
            return translated_text

    def translate_file(self, path: str, **kwargs) -> str:
        """
        translate directly from file
        @param path: path to the target file
        @type path: str
        @param kwargs: additional args
        @return: str
        """
        return self._translate_file(path, **kwargs)

    def translate_batch(self, batch: List[str], **kwargs) -> List[str]:
        """
        translate a list of texts
        @param batch: list of texts you want to translate
        @return: list of translations
        """
        return self._translate_batch(batch, **kwargs)