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# File preloader

The tool to check the availability or syntax of domain, IP or URL.

::

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Provides the interface for the preloading of a given file.

Author: Nissar Chababy, @funilrys, contactTATAfunilrysTODTODcom

Special thanks: https://pyfunceble.github.io/#/special-thanks

Contributors: https://pyfunceble.github.io/#/contributors

Project link: https://github.com/funilrys/PyFunceble

Project documentation: https://docs.pyfunceble.com

Project homepage: https://pyfunceble.github.io/

License: ::

    Copyright 2017, 2018, 2019, 2020, 2022, 2023, 2024 Nissar Chababy

    Licensed under the Apache License, Version 2.0 (the "License");
    you may not use this file except in compliance with the License.
    You may obtain a copy of the License at

        https://www.apache.org/licenses/LICENSE-2.0

    Unless required by applicable law or agreed to in writing, software
    distributed under the License is distributed on an "AS IS" BASIS,
    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    See the License for the specific language governing permissions and
    limitations under the License.

## `FilePreloader`

Provides an interface for the file preloading. The main idea behind this interface is to read all lines of the given file parse each lines into something our autocontinue dataset understand.

Once everything preloaded in the autocontinue dataset, one can use the :meth:`PyFunceble.dataset.autocontinue.base.ContinueDataset.get_to_test` to get the next subject to test.

By doing this, we don't have to re-read a file completely once we are sure that the hash of the file didn't changed.

Parameters:

Name | Type | Description | Default
--- | --- | --- | ---
`authorized` | `Optional[bool]` | The authorization to launch. If class:`None` is given, we will try to guess the best value. | `None`
`protocol` | `Optional[dict]` | The protocol describing the file to test. | `None`

Source code in `PyFunceble/cli/file_preloader.py`

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    class FilePreloader:
        """
        Provides an interface for the file preloading.
        The main idea behind this interface is to read all lines of the given file
        parse each lines into something our autocontinue dataset understand.

        Once everything preloaded in the autocontinue dataset, one can use the
        :meth:`PyFunceble.dataset.autocontinue.base.ContinueDataset.get_to_test`
        to get the next subject to test.

        By doing this, we don't have to re-read a file completely once we are sure
        that the hash of the file didn't changed.

        :param authorized:
            The authorization to launch.
            If :py:class:`None` is given, we will try to guess the best value.

        :param protocol:
            The protocol describing the file to test.
        """

        STD_AUTHORIZED: bool = False

        _authorized: Optional[bool] = False
        _protocol: Optional[dict] = None

        __description: list = []
        __description_file: Optional[str] = None
        __matching_index: int = 0

        continuous_integration: Optional[ContinuousIntegrationBase] = None

        continue_dataset: Optional[ContinueDatasetBase] = None

        checker_type: Optional[str] = None

        subject2complements: Optional[Subject2Complements] = None
        inputline2subject: Optional[InputLine2Subject] = None
        adblock_inputline2subject: Optional[AdblockInputLine2Subject] = None
        wildcard2subject: Optional[Wildcard2Subject] = None
        rpz_policy2subject: Optional[RPZPolicy2Subject] = None
        rpz_inputline2subject: Optional[RPZInputLine2Subject] = None
        url2netloc: Optional[Url2Netloc] = None
        cidr2subject: Optional[CIDR2Subject] = None

        def __init__(
            self,
            *,
            authorized: Optional[bool] = None,
            protocol: Optional[dict] = None,
            continuous_integration: Optional[ContinuousIntegrationBase] = None,
            checker_type: Optional[str] = None,
            adblock_inputline2subject: Optional[AdblockInputLine2Subject] = None,
            wildcard2subject: Optional[Wildcard2Subject] = None,
            rpz_policy2subject: Optional[RPZPolicy2Subject] = None,
            rpz_inputline2subject: Optional[RPZInputLine2Subject] = None,
            inputline2subject: Optional[InputLine2Subject] = None,
            subject2complements: Optional[Subject2Complements] = None,
            url2netloc: Optional[Url2Netloc] = None,
            continue_dataset: Optional[ContinueDatasetBase] = None,
            inactive_dataset: Optional[InactiveDatasetBase] = None,
            cidr2subject: Optional[CIDR2Subject] = None,
        ) -> None:
            if authorized is not None:
                self.authorized = authorized
            else:
                self.guess_and_set_authorized()

            if protocol is not None:
                self.file_path = protocol

            self.continuous_integration = continuous_integration

            self.checker_type = checker_type
            self.adblock_inputline2subject = adblock_inputline2subject
            self.wildcard2subject = wildcard2subject
            self.rpz_policy2subject = rpz_policy2subject
            self.rpz_inputline2subject = rpz_inputline2subject
            self.inputline2subject = inputline2subject
            self.subject2complements = subject2complements
            self.url2netloc = url2netloc
            self.continue_dataset = continue_dataset
            self.inactive_dataset = inactive_dataset
            self.cidr2subject = cidr2subject

        def execute_if_authorized(default: Any = None):  # pylint: disable=no-self-argument
            """
            Executes the decorated method only if we are authorized to process.
            Otherwise, apply the given :code:`default`.

            .. warning::
                If :py:class:`None` is given as default value, this method will
                return the :code:`self` object.
            """

            def inner_method(func):
                @functools.wraps(func)
                def wrapper(self, *args, **kwargs):
                    if self.authorized:
                        return func(self, *args, **kwargs)  # pylint: disable=not-callable
                    return self if default is None else default

                return wrapper

            return inner_method

        def ensure_protocol_is_given(func):  # pylint: disable=no-self-argument
            """
            Ensures that the protocol is given before launching the decorated method.

            :raise RuntimeError:
                When the protocol is not declared yet.
            """

            @functools.wraps(func)
            def wrapper(self, *args, **kwargs):
                if self.protocol is None:
                    raise RuntimeError("<self.protocol> is not given.")

                return func(self, *args, **kwargs)  # pylint: disable=not-callable

            return wrapper

        @property
        def authorized(self) -> Optional[bool]:
            """
            Provides the current state of the :code:`_authorized` attribute.
            """

            return self._authorized

        @authorized.setter
        def authorized(self, value: bool) -> None:
            """
            Sets the value of the :code:`_authorized` attribute.

            :param value:
                The value to set.

            :raise TypeError:
                When the given :code:`value` is not a :py:class:`bool`.
            """

            if not isinstance(value, bool):
                raise TypeError(f"<value> should be {bool}, {type(value)} given.")

            self._authorized = value

        def set_authorized(self, value: bool) -> "FilePreloader":
            """
            Sets the value of the :code:`_authorized` attribute.

            :param value:
                The value to set.
            """

            self.authorized = value

            return self

        @property
        def protocol(self) -> Optional[dict]:
            """
            Provides the current state of the :code:`_file_path` attribute.
            """

            return self._protocol

        @protocol.setter
        def protocol(self, value: dict) -> None:
            """
            Sets the value of the :code:`_protocol` attribute.

            :param value:
                The value to set.

            :raise TypeError:
                When the given :code:`value` is not a :py:class:`dict`.
            :raise ValueError:
                When the given :code:`value` is empty.
            """

            if not isinstance(value, dict):
                raise TypeError(f"<value> should be {str}, {type(value)} given.")

            self._protocol = value
            self.__description_file = os.path.join(
                self._protocol["output_dir"], PyFunceble.cli.storage.PRE_LOADER_FILE
            )

        def set_protocol(self, value: dict) -> "FilePreloader":
            """
            Sets the value of the :code:`_protocol` attribute.

            :param value:
                The value to set.
            """

            self.protocol = value

            return self

        def guess_and_set_authorized(self) -> "FilePreloader":
            """
            Try to guess and set the value of the :code:`_authorized` attribute.
            """

            if PyFunceble.facility.ConfigLoader.is_already_loaded():
                if bool(PyFunceble.storage.CONFIGURATION.cli_testing.autocontinue) and bool(
                    PyFunceble.storage.CONFIGURATION.cli_testing.preload_file
                ):
                    self.authorized = True
                else:
                    self.authorized = self.STD_AUTHORIZED
            else:
                self.authorized = self.STD_AUTHORIZED

            return self

        @execute_if_authorized(False)
        @ensure_protocol_is_given
        def does_preloader_description_file_exists(self) -> bool:
            """
            Checks if our preloader file exists.
            """

            return FileHelper(self.__description_file).exists()

        def __load_description(self) -> "FilePreloader":
            """
            Loads the descriptoin into the interface.
            """

            def set_new_dataset(*, append: bool = False, new_index: int = 0) -> None:
                """
                Sets the default dataset into the given index.

                :param new_index:
                    The index to write into.
                :param append:
                    Append instead.
                """

                new_dataset = copy.deepcopy(self.protocol)
                new_dataset["previous_hash"] = None
                new_dataset["hash"] = None
                new_dataset["line_number"] = 1

                if append:
                    self.__description.append(new_dataset)
                elif self.__description:
                    self.__description[new_index] = new_dataset
                else:
                    self.__description = [new_dataset]

            if self.does_preloader_description_file_exists():
                dataset = DictHelper().from_json_file(self.__description_file)

                if not isinstance(dataset, list):
                    dataset = [dataset]

                found = False

                for index, descr in enumerate(dataset):
                    if all(x in descr and descr[x] == y for x, y in self.protocol.items()):
                        self.__matching_index = index
                        found = True
                        break

                self.__description = dataset

                if not found:
                    set_new_dataset(append=True)
                    self.__matching_index = len(self.__description) - 1
            else:
                set_new_dataset()

            return self

        def __save_description(self) -> "FilePreloader":
            """
            Saves the description at its destination.
            """

            self.__description[self.__matching_index].update(self.protocol)

            DictHelper(self.__description).to_json_file(self.__description_file)

        @execute_if_authorized(None)
        @ensure_protocol_is_given
        def start(self, print_dots: bool = False) -> "FilePreloader":
            """
            Starts the pre-loading of the currently set file path.
            """

            self.__load_description()

            broken = False
            file_helper = FileHelper(self.protocol["subject"])
            self.__description[self.__matching_index]["hash"] = HashHelper().hash_file(
                file_helper.path
            )

            if isinstance(self.continue_dataset, CSVContinueDataset):
                self.continue_dataset.set_base_directory(self.protocol["output_dir"])

            if (
                self.__description[self.__matching_index]["checker_type"]
                != self.protocol["checker_type"]
                or self.__description[self.__matching_index]["subject_type"]
                != self.protocol["subject_type"]
            ):
                try:
                    self.continue_dataset.cleanup()
                except TypeError:
                    self.continue_dataset.cleanup(session_id=self.protocol["session_id"])

            if (
                self.__description[self.__matching_index]["previous_hash"]
                and self.__description[self.__matching_index]["hash"]
                != self.__description[self.__matching_index]["previous_hash"]
            ):
                # Forces the reading of each lines because there is literally no
                # way to know where something has been changed.
                self.__description[self.__matching_index]["line_number"] = 1

            if (
                self.__description[self.__matching_index]["checker_type"]
                != self.protocol["checker_type"]
                or self.__description[self.__matching_index]["subject_type"]
                != self.protocol["subject_type"]
                or self.__description[self.__matching_index]["hash"]
                != self.__description[self.__matching_index]["previous_hash"]
            ):
                try:
                    with file_helper.open("r", encoding="utf-8") as file_stream:
                        line_num = 1

                        for line in file_stream:
                            if (
                                line_num
                                < self.__description[self.__matching_index]["line_number"]
                            ):
                                line_num += 1
                                continue

                            if (
                                self.continuous_integration
                                and self.continuous_integration.is_time_exceeded()
                            ):
                                broken = True
                                break

                            line = line.strip()

                            if self.rpz_policy2subject and "SOA" in line:
                                self.rpz_policy2subject.set_soa(line.split()[0])

                            for subject in get_subjects_from_line(
                                line,
                                self.checker_type,
                                subject_type=self.protocol["subject_type"],
                                adblock_inputline2subject=self.adblock_inputline2subject,
                                wildcard2subject=self.wildcard2subject,
                                rpz_policy2subject=self.rpz_policy2subject,
                                rpz_inputline2subject=self.rpz_inputline2subject,
                                inputline2subject=self.inputline2subject,
                                subject2complements=self.subject2complements,
                                url2netloc=self.url2netloc,
                                cidr2subject=self.cidr2subject,
                            ):
                                to_send = copy.deepcopy(self.protocol)
                                to_send["subject"] = subject
                                to_send["idna_subject"] = domain2idna(subject)
                                to_send["tested_at"] = datetime.now(
                                    timezone.utc
                                ) - timedelta(days=365.25 * 20)

                                if self.inactive_dataset.exists(to_send):
                                    print_single_line("I")
                                    continue

                                if TesterWorker.should_be_ignored(
                                    subject=to_send["idna_subject"]
                                ):
                                    print_single_line("X")
                                    continue

                                self.continue_dataset.update(to_send, ignore_if_exist=True)

                                if print_dots:
                                    print_single_line()

                            self.__description[self.__matching_index]["line_number"] += 1
                            line_num += 1
                except KeyboardInterrupt as exception:
                    self.__save_description()
                    raise exception

            if not broken:
                self.__description[self.__matching_index]["previous_hash"] = (
                    self.__description[self.__matching_index]["hash"]
                )

            self.__save_description()

            return self

### `authorized: Optional[bool]` `property` `writable`

Provides the current state of the :code:`_authorized` attribute.

### `protocol: Optional[dict]` `property` `writable`

Provides the current state of the :code:`_file_path` attribute.

### `__load_description()`

Loads the descriptoin into the interface.

Source code in `PyFunceble/cli/file_preloader.py`

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    def __load_description(self) -> "FilePreloader":
        """
        Loads the descriptoin into the interface.
        """

        def set_new_dataset(*, append: bool = False, new_index: int = 0) -> None:
            """
            Sets the default dataset into the given index.

            :param new_index:
                The index to write into.
            :param append:
                Append instead.
            """

            new_dataset = copy.deepcopy(self.protocol)
            new_dataset["previous_hash"] = None
            new_dataset["hash"] = None
            new_dataset["line_number"] = 1

            if append:
                self.__description.append(new_dataset)
            elif self.__description:
                self.__description[new_index] = new_dataset
            else:
                self.__description = [new_dataset]

        if self.does_preloader_description_file_exists():
            dataset = DictHelper().from_json_file(self.__description_file)

            if not isinstance(dataset, list):
                dataset = [dataset]

            found = False

            for index, descr in enumerate(dataset):
                if all(x in descr and descr[x] == y for x, y in self.protocol.items()):
                    self.__matching_index = index
                    found = True
                    break

            self.__description = dataset

            if not found:
                set_new_dataset(append=True)
                self.__matching_index = len(self.__description) - 1
        else:
            set_new_dataset()

        return self

### `__save_description()`

Saves the description at its destination.

Source code in `PyFunceble/cli/file_preloader.py`

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    def __save_description(self) -> "FilePreloader":
        """
        Saves the description at its destination.
        """

        self.__description[self.__matching_index].update(self.protocol)

        DictHelper(self.__description).to_json_file(self.__description_file)

### `does_preloader_description_file_exists()`

Checks if our preloader file exists.

Source code in `PyFunceble/cli/file_preloader.py`

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    @execute_if_authorized(False)
    @ensure_protocol_is_given
    def does_preloader_description_file_exists(self) -> bool:
        """
        Checks if our preloader file exists.
        """

        return FileHelper(self.__description_file).exists()

### `ensure_protocol_is_given(func)`

Ensures that the protocol is given before launching the decorated method.

Raises:

Type | Description
--- | ---
`RuntimeError` | When the protocol is not declared yet.

Source code in `PyFunceble/cli/file_preloader.py`

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    def ensure_protocol_is_given(func):  # pylint: disable=no-self-argument
        """
        Ensures that the protocol is given before launching the decorated method.

        :raise RuntimeError:
            When the protocol is not declared yet.
        """

        @functools.wraps(func)
        def wrapper(self, *args, **kwargs):
            if self.protocol is None:
                raise RuntimeError("<self.protocol> is not given.")

            return func(self, *args, **kwargs)  # pylint: disable=not-callable

        return wrapper

### `execute_if_authorized(default=None)`

Executes the decorated method only if we are authorized to process. Otherwise, apply the given :code:`default`.

.. warning:: If class:`None` is given as default value, this method will return the :code:`self` object.

Source code in `PyFunceble/cli/file_preloader.py`

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    def execute_if_authorized(default: Any = None):  # pylint: disable=no-self-argument
        """
        Executes the decorated method only if we are authorized to process.
        Otherwise, apply the given :code:`default`.

        .. warning::
            If :py:class:`None` is given as default value, this method will
            return the :code:`self` object.
        """

        def inner_method(func):
            @functools.wraps(func)
            def wrapper(self, *args, **kwargs):
                if self.authorized:
                    return func(self, *args, **kwargs)  # pylint: disable=not-callable
                return self if default is None else default

            return wrapper

        return inner_method

### `guess_and_set_authorized()`

Try to guess and set the value of the :code:`_authorized` attribute.

Source code in `PyFunceble/cli/file_preloader.py`

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    def guess_and_set_authorized(self) -> "FilePreloader":
        """
        Try to guess and set the value of the :code:`_authorized` attribute.
        """

        if PyFunceble.facility.ConfigLoader.is_already_loaded():
            if bool(PyFunceble.storage.CONFIGURATION.cli_testing.autocontinue) and bool(
                PyFunceble.storage.CONFIGURATION.cli_testing.preload_file
            ):
                self.authorized = True
            else:
                self.authorized = self.STD_AUTHORIZED
        else:
            self.authorized = self.STD_AUTHORIZED

        return self

### `set_authorized(value)`

Sets the value of the :code:`_authorized` attribute.

Parameters:

Name | Type | Description | Default
--- | --- | --- | ---
`value` | `bool` | The value to set. | required

Source code in `PyFunceble/cli/file_preloader.py`

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    def set_authorized(self, value: bool) -> "FilePreloader":
        """
        Sets the value of the :code:`_authorized` attribute.

        :param value:
            The value to set.
        """

        self.authorized = value

        return self

### `set_protocol(value)`

Sets the value of the :code:`_protocol` attribute.

Parameters:

Name | Type | Description | Default
--- | --- | --- | ---
`value` | `dict` | The value to set. | required

Source code in `PyFunceble/cli/file_preloader.py`

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    def set_protocol(self, value: dict) -> "FilePreloader":
        """
        Sets the value of the :code:`_protocol` attribute.

        :param value:
            The value to set.
        """

        self.protocol = value

        return self

### `start(print_dots=False)`

Starts the pre-loading of the currently set file path.

Source code in `PyFunceble/cli/file_preloader.py`

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    @execute_if_authorized(None)
    @ensure_protocol_is_given
    def start(self, print_dots: bool = False) -> "FilePreloader":
        """
        Starts the pre-loading of the currently set file path.
        """

        self.__load_description()

        broken = False
        file_helper = FileHelper(self.protocol["subject"])
        self.__description[self.__matching_index]["hash"] = HashHelper().hash_file(
            file_helper.path
        )

        if isinstance(self.continue_dataset, CSVContinueDataset):
            self.continue_dataset.set_base_directory(self.protocol["output_dir"])

        if (
            self.__description[self.__matching_index]["checker_type"]
            != self.protocol["checker_type"]
            or self.__description[self.__matching_index]["subject_type"]
            != self.protocol["subject_type"]
        ):
            try:
                self.continue_dataset.cleanup()
            except TypeError:
                self.continue_dataset.cleanup(session_id=self.protocol["session_id"])

        if (
            self.__description[self.__matching_index]["previous_hash"]
            and self.__description[self.__matching_index]["hash"]
            != self.__description[self.__matching_index]["previous_hash"]
        ):
            # Forces the reading of each lines because there is literally no
            # way to know where something has been changed.
            self.__description[self.__matching_index]["line_number"] = 1

        if (
            self.__description[self.__matching_index]["checker_type"]
            != self.protocol["checker_type"]
            or self.__description[self.__matching_index]["subject_type"]
            != self.protocol["subject_type"]
            or self.__description[self.__matching_index]["hash"]
            != self.__description[self.__matching_index]["previous_hash"]
        ):
            try:
                with file_helper.open("r", encoding="utf-8") as file_stream:
                    line_num = 1

                    for line in file_stream:
                        if (
                            line_num
                            < self.__description[self.__matching_index]["line_number"]
                        ):
                            line_num += 1
                            continue

                        if (
                            self.continuous_integration
                            and self.continuous_integration.is_time_exceeded()
                        ):
                            broken = True
                            break

                        line = line.strip()

                        if self.rpz_policy2subject and "SOA" in line:
                            self.rpz_policy2subject.set_soa(line.split()[0])

                        for subject in get_subjects_from_line(
                            line,
                            self.checker_type,
                            subject_type=self.protocol["subject_type"],
                            adblock_inputline2subject=self.adblock_inputline2subject,
                            wildcard2subject=self.wildcard2subject,
                            rpz_policy2subject=self.rpz_policy2subject,
                            rpz_inputline2subject=self.rpz_inputline2subject,
                            inputline2subject=self.inputline2subject,
                            subject2complements=self.subject2complements,
                            url2netloc=self.url2netloc,
                            cidr2subject=self.cidr2subject,
                        ):
                            to_send = copy.deepcopy(self.protocol)
                            to_send["subject"] = subject
                            to_send["idna_subject"] = domain2idna(subject)
                            to_send["tested_at"] = datetime.now(
                                timezone.utc
                            ) - timedelta(days=365.25 * 20)

                            if self.inactive_dataset.exists(to_send):
                                print_single_line("I")
                                continue

                            if TesterWorker.should_be_ignored(
                                subject=to_send["idna_subject"]
                            ):
                                print_single_line("X")
                                continue

                            self.continue_dataset.update(to_send, ignore_if_exist=True)

                            if print_dots:
                                print_single_line()

                        self.__description[self.__matching_index]["line_number"] += 1
                        line_num += 1
            except KeyboardInterrupt as exception:
                self.__save_description()
                raise exception

        if not broken:
            self.__description[self.__matching_index]["previous_hash"] = (
                self.__description[self.__matching_index]["hash"]
            )

        self.__save_description()

        return self