scripts/gutenberg_process.py

import concurrent.futures as fut
import pathlib
import ftfy
import orjson
import re
import psutil
from bs4 import BeautifulSoup, Comment
import markdownify
from text_toolkit import normalize_puncts, clean_newlines, merge_consecutive_lines


class md_nolinks(markdownify.MarkdownConverter):
    def convert_a(self, _, text, __):
        _, _, text = markdownify.chomp(text)
        if not text:
            return ""
        return text

    def convert_img(self, el, text, convert_as_inline):
        return ""


md = md_nolinks()


def blackbox(soup: pathlib.Path, filename: pathlib.Path):
    p = psutil.Process()
    p.cpu_affinity([i for i in range(0, 64)])
    path = pathlib.Path(soup)
    data_bytes = path.read_bytes()
    try:
        utf8 = data_bytes.decode("utf-8")
        utf8, explain = ftfy.fix_and_explain(utf8)
    except UnicodeDecodeError:
        # print("Attempt Black magic...")
        magic_data, magic_explain = ftfy.guess_bytes(data_bytes)
        # print(magic_explain)
        utf8, explain = ftfy.fix_and_explain(magic_data)
        # Skip
    soup = BeautifulSoup(utf8, "lxml")
    pre = soup.find("pre")
    [i.decompose() for i in soup.find_all("span", attrs={"class": "pagenum"})]
    [i.extract() for i in soup.findAll(text=lambda text: isinstance(text, Comment))]
    composed_content = []
    if pre:
        # Gutenberg pre html block
        txt: str = pre.get_text()
        # rgx = re.compile(r"\*\*+START\*\*\*+([\S\s]+)\*END\*")
        if "gutenberg e" in txt.lower():
            if not pre.parent:
                raise Exception
            has_pre = False
            for child in pre.next_siblings:
                if isinstance(child, str):
                    composed_content.append(child.lstrip())

                if child.name == "pre":
                    # print(child)
                    has_pre = True
                    break
                if child.name == "table":
                    continue
                if child.name is None:
                    continue
                child_filt = child.get_text().lower()
                if (
                    child.name in ["div", "p"]
                    and "transcriber" in child_filt
                    and "note" in child_filt
                ):
                    continue
                if "pagenum" in child.get("class", ""):
                    continue
                composed_content.append(child)
        else:
            # For HR rules.
            look_ahead = 5
            sibs = []
            rule = None
            for sibling in pre.next_siblings:
                if look_ahead > 0:
                    if sibling.name == "hr":
                        rule = sibling
                        break
                    else:
                        sibs.append(sibling)
            if not rule:
                raise Exception
            else:
                pass
            for t_block in rule.next_siblings:
                if isinstance(t_block, str):
                    composed_content.append(t_block.lstrip(" "))
                    continue
                if not t_block.get_text().strip():
                    continue

                if t_block.name == "hr" and "full" in t_block.get("class", ""):
                    break
                gt = t_block.get_text().lower()
                if t_block.name == "pre" and "gutenberg" in gt:
                    break
                elif t_block.name == "p" and "end of" in gt and "gutenberg" in gt:
                    break
                else:
                    composed_content.append(t_block)

    else:
        print("no pre", filename)
        # We have to iter the book page it like some sort of caveman...
        body = soup.find("body")
        if not body:
            raise Exception("Invisible man?")
            # ???
        pre_ctx = []
        ctx = []
        post_ctx = []
        mode = 0
        for children in body:
            if isinstance(children, str):
                continue
            if isinstance(children, type(None)):
                continue
            gt = children.get_text()
            if children.name == "table":
                children.decompose()
            if (
                (children.name == "div" or children.name == "p")
                and "start of" in gt.lower()
                and "gutenberg" in gt.lower()
            ):
                mode = 0.5
                pre_ctx.append(children)
            if (
                (children.name == "div" or children.name == "p")
                and "end of" in gt.lower()
                and "gutenberg" in gt.lower()
                and mode == 1
            ):
                mode = 2
                post_ctx.append(children)
            if mode == 0:
                pre_ctx.append(children)
            elif mode == 0.5:
                mode = 1
                pre_ctx.append(children)
            elif mode == 1:
                ctx.append(children)
            elif mode == 2:
                post_ctx.append(children)
        z_ctx = []
        for pp in ctx:
            if pp.name is None:
                continue
            z_ctx.append(pp)
        composed_content = z_ctx
    pure = []
    for content in composed_content:
        if isinstance(content, str):
            pure.append(content)
            continue
        if not content.name:
            continue
        if "toc" in content.get("class", "") and content.name in ["ul", "ol"]:
            continue
        pure.append(content)
    pp = normalize_puncts(
        "\n".join(
            [
                md.convert_soup(soup_content)
                if not isinstance(soup_content, str)
                else soup_content
                for soup_content in pure
            ]
        )
    )
    pp = clean_newlines(pp)
    pp = merge_consecutive_lines(pp)
    pp = clean_newlines(pp)
    pathlib.Path(filename).write_text(pp, encoding="utf-8")

    return pp


pathlib.Path("gutenberg_processed").mkdir(exist_ok=True)


if __name__ == "__main__":
    with fut.ProcessPoolExecutor(max_workers=64) as pool:
        futures = []
        for gutenbook in orjson.loads(pathlib.Path("final.json").read_bytes()):
            path, f_type = gutenbook
            if f_type == "html":
                # print("processing", path)
                path = pathlib.Path(path)
                list_html = list(path.glob("*.htm"))
                if len(list_html) > 1:
                    print(list_html)
                list_html = list_html[0]

                futures.append(
                    pool.submit(
                        blackbox,
                        list_html,
                        str(
                            pathlib.Path("gutenberg_processed")
                            / list_html.with_suffix(".txt").name
                        ),
                    )
                )
        print("Waiting for the future to arrive...")
        fut.wait(futures)