openmedialibrary/oml/meta/__init__.py

# -*- coding: utf-8 -*-
# vi:si:et:sw=4:sts=4:ts=4


import stdnum.isbn
import ox

from . import google
from . import duckduckgo

from .utils import decode_html_data

from oml import settings

import logging
logger = logging.getLogger(__name__)


providers = [
    ('openlibrary', 'olid'),
    ('loc', 'lccn'),
    ('worldcat', 'oclc'),
    ('worldcat', 'isbn'),
    ('lookupbyisbn', 'asin'),
    ('lookupbyisbn', 'isbn'),
    ('abebooks', 'isbn')
]

def find(title=None, author=None):
    results = google.find(title=title, author=author)
    #results = duckduckgo.find(query)
    '''
    results = openlibrary.find(query)
    for r in results:
        r['primaryid'] = 'olid'
    '''
    return results

def lookup_provider(arg):
    provider, id, ids, key, value = arg
    values = set()
    for key, value in ids:
        if key == id or provider in ('openlibrary', ):
            for kv in globals()[provider].get_ids(key, value):
                values.add(kv)
    return values

def lookup(key, value):
    if not isvalid_id(key, value):
        return {}
    if key == 'isbn':
        try:
            data = google.info(value)
        except:
            logger.debug('google.info failed %s=%s', key, value, exc_info=True)
            data = {}
    else:
        data = {key: [value]}
        ids = set([(key, value)])
        provider_data = {}
        done = False

        while not done:
            done = True
            for provider, id in providers:
                result = lookup_provider((provider, id, ids, key, value))
                done = not result - ids
                ids.update(result)
        logger.debug('FIXME: sort ids')
        ids = sorted(ids, key=lambda i: ox.sort_string(''.join(i)))
        logger.debug('IDS %s', ids)
        for k, v in ids:
            for provider, id in providers:
                if id == k:
                    if provider not in provider_data:
                        provider_data[provider] = {}
                    for k_, v_ in globals()[provider].lookup(v).items():
                        if k_ not in provider_data[provider]:
                            provider_data[provider][k_] = v_
        for provider in sorted(
            list(provider_data.keys()),
            key=lambda x: -len(provider_data[x])
        ):
            logger.debug('%s %s %s', provider, len(provider_data[provider]), list(provider_data[provider].keys()))
            for k_, v_ in provider_data[provider].items():
                if not k_ in data:
                    data[k_] = v_
        for k, v in ids:
            if k not in data:
                data[k] = []
            if v not in data[k]:
                data[k].append(v)
    for key in [k['id'] for k in settings.config['itemKeys'] if isinstance(k['type'], list)]:
        if key in data and not isinstance(data[key], list):
            data[key] = [data[key]]
    data = decode_html_data(data)
    return data

def isvalid_id(key, value):
    if key == 'isbn':
        if len(value) not in (10, 13) or not stdnum.isbn.is_valid(value):
            return False
    if key == 'asin' and len(value) != 10:
        return False
    if key == 'olid' and not (value.startswith('OL') and value.endswith('M')):
        return False
    return True