options.py

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#
#   http://www.apache.org/licenses/LICENSE-2.0
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# under the License.

import base64
import os
from typing import BinaryIO, Optional, Union

from selenium.webdriver.common.desired_capabilities import DesiredCapabilities
from selenium.webdriver.common.options import ArgOptions


class ChromiumOptions(ArgOptions):
    KEY = "goog:chromeOptions"

    def __init__(self) -> None:
        super().__init__()
        self._binary_location: str = ""
        self._extension_files: list[str] = []
        self._extensions: list[str] = []
        self._experimental_options: dict[str, Union[str, int, dict, list[str]]] = {}
        self._debugger_address: Optional[str] = None
        self._enable_webextensions: bool = False

    @property
    def binary_location(self) -> str:
        """:Returns: The location of the binary, otherwise an empty string."""
        return self._binary_location

    @binary_location.setter
    def binary_location(self, value: str) -> None:
        """Allows you to set where the chromium binary lives.

        Parameters:
        ----------
            value: path to the Chromium binary
        """
        if not isinstance(value, str):
            raise TypeError(self.BINARY_LOCATION_ERROR)
        self._binary_location = value

    @property
    def debugger_address(self) -> Optional[str]:
        """:Returns: The address of the remote devtools instance."""
        return self._debugger_address

    @debugger_address.setter
    def debugger_address(self, value: str) -> None:
        """Allows you to set the address of the remote devtools instance that
        the ChromeDriver instance will try to connect to during an active wait.

        Parameters:
        ----------
            value: address of remote devtools instance if any (hostname[:port])
        """
        if not isinstance(value, str):
            raise TypeError("Debugger Address must be a string")
        self._debugger_address = value

    @property
    def extensions(self) -> list[str]:
        """:Returns: A list of encoded extensions that will be loaded."""

        def _decode(file_data: BinaryIO) -> str:
            # Should not use base64.encodestring() which inserts newlines every
            # 76 characters (per RFC 1521).  Chromedriver has to remove those
            # unnecessary newlines before decoding, causing performance hit.
            return base64.b64encode(file_data.read()).decode("utf-8")

        encoded_extensions = []
        for extension in self._extension_files:
            with open(extension, "rb") as f:
                encoded_extensions.append(_decode(f))

        return encoded_extensions + self._extensions

    def add_extension(self, extension: str) -> None:
        """Adds the path to the extension to a list that will be used to
        extract it to the ChromeDriver.

        Parameters:
        ----------
            extension: path to the \\*.crx file
        """
        if extension:
            extension_to_add = os.path.abspath(os.path.expanduser(extension))
            if os.path.exists(extension_to_add):
                self._extension_files.append(extension_to_add)
            else:
                raise OSError("Path to the extension doesn't exist")
        else:
            raise ValueError("argument can not be null")

    def add_encoded_extension(self, extension: str) -> None:
        """Adds Base64 encoded string with extension data to a list that will
        be used to extract it to the ChromeDriver.

        Parameters:
        ----------
            extension: Base64 encoded string with extension data
        """
        if extension:
            self._extensions.append(extension)
        else:
            raise ValueError("argument can not be null")

    @property
    def experimental_options(self) -> dict:
        """:Returns: A dictionary of experimental options for chromium."""
        return self._experimental_options

    def add_experimental_option(self, name: str, value: Union[str, int, dict, list[str]]) -> None:
        """Adds an experimental option which is passed to chromium.

        Parameters:
        ----------
          name: The experimental option name.
          value: The option value.
        """
        self._experimental_options[name] = value

    @property
    def enable_webextensions(self) -> bool:
        """:Returns: Whether webextension support is enabled for Chromium-based browsers.
        True if webextension support is enabled, False otherwise.
        """
        return self._enable_webextensions

    @enable_webextensions.setter
    def enable_webextensions(self, value: bool) -> None:
        """Enables or disables webextension support for Chromium-based browsers.

        Parameters:
        ----------
            value : bool
                True to enable webextension support, False to disable.

        Notes:
        -----
        - When enabled, this automatically adds the required Chromium flags:
            - --enable-unsafe-extension-debugging
            - --remote-debugging-pipe
        - When disabled, this removes BOTH flags listed above, even if they were manually added via add_argument()
          before enabling webextensions.
        - Enabling --remote-debugging-pipe makes the connection b/w chromedriver
          and the browser use a pipe instead of a port, disabling many CDP functionalities
          like devtools
        """
        self._enable_webextensions = value
        if value:
            # Add required flags for Chromium webextension support
            required_flags = ["--enable-unsafe-extension-debugging", "--remote-debugging-pipe"]
            for flag in required_flags:
                if flag not in self._arguments:
                    self.add_argument(flag)
        else:
            # Remove webextension flags if disabling
            flags_to_remove = ["--enable-unsafe-extension-debugging", "--remote-debugging-pipe"]
            for flag in flags_to_remove:
                if flag in self._arguments:
                    self._arguments.remove(flag)

    def to_capabilities(self) -> dict:
        """Creates a capabilities with all the options that have been set

        Returns:
        -------
            dict : a dictionary with all set options
        """
        caps = self._caps
        chrome_options = self.experimental_options.copy()
        if self.mobile_options:
            chrome_options.update(self.mobile_options)
        chrome_options["extensions"] = self.extensions
        if self.binary_location:
            chrome_options["binary"] = self.binary_location
        chrome_options["args"] = self._arguments
        if self.debugger_address:
            chrome_options["debuggerAddress"] = self.debugger_address

        caps[self.KEY] = chrome_options

        return caps

    @property
    def default_capabilities(self) -> dict:
        return DesiredCapabilities.CHROME.copy()