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123 lines
3.6 KiB
123 lines
3.6 KiB
"""Generates PDF cards from a calibre metadata.db."""
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import os
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import shutil
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from pathlib import Path
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from textwrap import shorten
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from calibrestekje import Book, Comment, Publisher, init_session
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from reportlab.lib.pagesizes import *
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from reportlab.lib.styles import ParagraphStyle, getSampleStyleSheet
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from reportlab.pdfgen import canvas
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from reportlab.platypus import PageBreak, Paragraph, SimpleDocTemplate, Spacer
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CWD = Path().resolve()
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NUM_WORDS_COMMENT = 50
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from html.parser import HTMLParser
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from io import StringIO
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class MLStripper(HTMLParser):
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"""https://stackoverflow.com/a/925630"""
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def __init__(self):
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super().__init__()
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self.reset()
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self.strict = False
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self.convert_charrefs = True
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self.text = StringIO()
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def handle_data(self, d):
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self.text.write(d)
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def get_data(self):
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return self.text.getvalue()
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def strip_tags(html):
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"""HTML stripper."""
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s = MLStripper()
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s.feed(html)
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return s.get_data()
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def make_cards(filepath, db_path, side_a, side_b):
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"""The main entrypoint for card generation."""
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filename = os.path.basename(filepath)
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doc = create_doc(filename)
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content = get_fields(db_path, side_a, side_b)
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doc.build(content)
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shutil.move(os.path.join(CWD, filename), filepath)
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def select_fields(fields, content, styles, book):
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if "title" in fields:
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tag = "<font size=12>{}</font>".format(strip_tags(book.title))
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ptitle = Paragraph(tag, styles["Italic"])
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content.append(ptitle)
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content.append(Spacer(1, 12))
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if "timestamp" in fields:
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tag = "<font size=10>Timestamp: {}</font>".format(book.timestamp)
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ptime = Paragraph(tag, styles["Normal"])
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content.append(ptime)
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content.append(Spacer(1, 12))
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if "comments" in fields:
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trimmed = " ".join([c.text for c in book.comments]).split()
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if len(trimmed) > NUM_WORDS_COMMENT:
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comments = "{}...".format(" ".join(trimmed[:NUM_WORDS_COMMENT]))
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else:
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comments = "{}".format(" ".join(trimmed[:NUM_WORDS_COMMENT]))
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tag = "<font size=10>{}</font>".format(strip_tags(comments))
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pcomments = Paragraph(tag)
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content.append(pcomments)
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content.append(Spacer(6, 12))
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if "authors" in fields:
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format_string = "<font size=12>{}</font>"
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all_authors = [strip_tags(author.name) for author in book.authors]
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glued_together = format_string.format(", ".join(all_authors))
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p = Paragraph(glued_together, styles["Normal"])
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content.append(p)
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content.append(Spacer(6, 12))
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if "tags" in fields:
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format_string = "<font size=10>{}</font>"
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all_tags = [strip_tags(tag.name) for tag in book.tags]
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tags_glued_together = format_string.format(", ".join(all_tags))
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p = Paragraph(tags_glued_together, styles["Normal"])
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content.append(p)
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content.append(Spacer(6, 12))
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return content
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def get_fields(db_path, side_a, side_b):
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"""Retrieve fields from the metadata."""
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content = []
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styles = getSampleStyleSheet()
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session = init_session(db_path)
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for book in session.query(Book).all():
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content = select_fields(side_a, content, styles, book)
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content.append(PageBreak())
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content = select_fields(side_b, content, styles, book)
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content.append(PageBreak())
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return content
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def create_doc(filename):
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"""Build the Report Lab document template."""
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return SimpleDocTemplate(
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filename,
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pagesize=landscape(A6),
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rightMargin=18,
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leftMargin=18,
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topMargin=0,
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bottomMargin=18,
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)
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