# coding=utf-8
# Copyright 2021 Intel Corporation. All rights reserved.
# Copyright 2018 The Google AI Language Team Authors and The HuggingFace Inc. team.
# Copyright (c) 2018, NVIDIA CORPORATION.  All rights reserved.
#
# 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
#
#     http://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.

import glob


class BookscorpusTextFormatting:
    def __init__(self, books_path, output_filename, recursive=False):
        self.books_path = books_path
        self.recursive = recursive
        self.output_filename = output_filename

    # This puts one book per line
    def merge(self):
        with open(self.output_filename, mode="w", newline="\n") as ofile:
            for filename in glob.glob(self.books_path + "/" + "*.txt", recursive=True):
                with open(filename, mode="r", encoding="utf-8-sig", newline="\n") as file:
                    for line in file:
                        if line.strip() != "":
                            ofile.write(line.strip() + " ")
                ofile.write("\n\n")
