moviewyrm/fedireads/goodreads_import.py
2020-04-15 13:27:25 +01:00

126 lines
3.5 KiB
Python

''' handle reading a csv from goodreads '''
import re
import csv
import itertools
import dateutil.parser
from fedireads import books_manager
from fedireads.models import Edition, ReadThrough
# Mapping goodreads -> fedireads shelf titles.
GOODREADS_SHELVES = {
'read': 'read',
'currently-reading': 'reading',
'to-read': 'to-read',
}
# TODO: remove or notify about this in the UI
MAX_ENTRIES = 20
def unquote_string(text):
''' resolve csv quote weirdness '''
match = re.match(r'="([^"]*)"', text)
if match:
return match.group(1)
return text
def construct_search_term(title, author):
''' formulate a query for the data connector '''
# Strip brackets (usually series title from search term)
title = re.sub(r'\s*\([^)]*\)\s*', '', title)
# Open library doesn't like including author initials in search term.
author = re.sub(r'(\w\.)+\s*', '', author)
return ' '.join([title, author])
class GoodreadsCsv:
''' define a goodreads csv '''
def __init__(self, csv_file):
self.reader = csv.DictReader(csv_file)
def __iter__(self):
for line in itertools.islice(self.reader, MAX_ENTRIES):
yield GoodreadsItem(line)
class GoodreadsItem:
''' a processed line in a goodreads csv '''
def __init__(self, line):
self.line = line
self.book = None
def resolve(self):
''' try various ways to lookup a book '''
self.book = (
self.get_book_from_db_isbn() or
self.get_book_from_isbn() or
self.get_book_from_title_author()
)
def get_book_from_db_isbn(self):
''' see if we already know about the book '''
try:
return Edition.objects.get(isbn=self.isbn)
except Edition.DoesNotExist:
return None
def get_book_from_isbn(self):
''' search by isbn '''
search_results = books_manager.search(self.isbn)
if search_results:
return books_manager.get_or_create_book(search_results[0].key)
def get_book_from_title_author(self):
''' search by title and author '''
search_term = construct_search_term(
self.line['Title'],
self.line['Author']
)
search_results = books_manager.search(search_term)
if search_results:
return books_manager.get_or_create_book(search_results[0].key)
@property
def isbn(self):
return unquote_string(self.line['ISBN13'])
@property
def shelf(self):
''' the goodreads shelf field '''
if self.line['Exclusive Shelf']:
return GOODREADS_SHELVES[self.line['Exclusive Shelf']]
@property
def review(self):
return self.line['My Review']
@property
def rating(self):
return int(self.line['My Rating'])
@property
def date_added(self):
if self.line['Date Added']:
return dateutil.parser.parse(self.line['Date Added'])
@property
def date_read(self):
if self.line['Date Read']:
return dateutil.parser.parse(self.line['Date Read'])
@property
def reads(self):
return [ReadThrough(
# Date added isn't the start date, but it's (perhaps) better than nothing.
start_date=self.date_added,
finish_date=self.date_read,
pages_read=None,
)]
def __repr__(self):
return "<GoodreadsItem {!r}>".format(self.line['Title'])
def __str__(self):
return "{} by {}".format(self.line['Title'], self.line['Author'])