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app.py
Executable file
390
app.py
Executable file
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#!/usr/bin/python3
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from flask import Flask, render_template, url_for
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from itertools import islice
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from pprint import pprint
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import dateutil.parser
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import urllib.parse
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import lxml.etree
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import requests
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import json
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import os
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url_start = 'http://www.wikidata.org/entity/Q'
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wikidata_url = 'https://www.wikidata.org/w/api.php'
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commons_url = 'https://www.wikidata.org/w/api.php'
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wikidata_query_api_url = 'https://query.wikidata.org/bigdata/namespace/wdq/sparql'
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commons_start = 'http://commons.wikimedia.org/wiki/Special:FilePath/'
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commons_api_url = 'https://tools.wmflabs.org/magnus-toolserver/commonsapi.php'
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commons_query_url = 'https://commons.wikimedia.org/w/api.php'
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thumbwidth = 300
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thumbheight = 400
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app = Flask(__name__)
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find_more_props = {
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'P135': 'movement',
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'P136': 'genre',
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'P170': 'artist',
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'P195': 'collection',
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'P276': 'location',
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'P495': 'country of origin',
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'P127': 'owned by',
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'P179': 'part of the series',
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# possible future props
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# 'P571': 'inception',
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# 'P921': 'main subject',
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}
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find_more_query = '''
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select ?item ?itemLabel ?image ?artist ?artistLabel ?title ?time ?timeprecision {
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SERVICE wikibase:label { bd:serviceParam wikibase:language "[AUTO_LANGUAGE],en". }
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?item wdt:P31 wd:Q3305213 .
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?item wdt:PID wd:QID .
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?item wdt:P18 ?image .
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OPTIONAL {
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?item p:P571/psv:P571 ?timenode .
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?timenode wikibase:timeValue ?time.
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?timenode wikibase:timePrecision ?timeprecision.
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}
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OPTIONAL { ?item wdt:P1476 ?title }
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OPTIONAL { ?item wdt:P170 ?artist }
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FILTER NOT EXISTS { ?item wdt:P180 ?depicts }
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}
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'''
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def ordinal(n):
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return "%d%s" % (n, 'tsnrhtdd'[(n / 10 % 10 != 1) * (n % 10 < 4) * n % 10::4])
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def chunk(it, size):
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it = iter(it)
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return iter(lambda: tuple(islice(it, size)), ())
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def run_wikidata_query(query):
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params = {'query': query, 'format': 'json'}
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r = requests.post(wikidata_query_api_url, data=params, stream=True)
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assert r.status_code == 200
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return r
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def drop_start(s, start):
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assert s.startswith(start)
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return s[len(start):]
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def row_id(row):
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return int(drop_start(row['item']['value'], url_start))
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def api_call(params, api_url=wikidata_url):
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call_params = {
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'format': 'json',
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'formatversion': 2,
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**params,
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}
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r = requests.get(wikidata_url, params=call_params)
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return r
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def get_entity(qid):
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json_data = api_call({'action': 'wbgetentities', 'ids': qid}).json()
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try:
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entity = list(json_data['entities'].values())[0]
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except KeyError:
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return
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if 'missing' not in entity:
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return entity
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def get_entities(ids, **params):
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if not ids:
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return []
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params = {
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'action': 'wbgetentities',
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'ids': '|'.join(ids),
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**params,
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}
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r = api_call(params)
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json_data = r.json()
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return list(json_data['entities'].values())
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@app.route("/")
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def index():
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return render_template('index.html')
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@app.route("/item/Q<int:item_id>")
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def item_page(item_id):
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qid = f'Q{item_id}'
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return render_template('item.html', qid=qid)
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def get_labels(keys, name=None):
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keys = sorted(keys, key=lambda i: int(i[1:]))
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if name is None:
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name = '_'.join(keys)
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filename = f'cache/{name}_labels.json'
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if os.path.exists(filename):
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labels = json.load(open(filename))
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else:
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labels = []
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for cur in chunk(keys, 50):
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labels += get_entities(cur, props='labels')
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json.dump(labels, open(filename, 'w'), indent=2)
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try:
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return {prop['id']: prop['labels']['en']['value'] for prop in labels}
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except TypeError:
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pprint(labels)
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raise
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def get_entity_with_cache(qid):
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filename = f'cache/{qid}.json'
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if os.path.exists(filename):
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entity = json.load(open(filename))
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else:
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entity = get_entity(qid)
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json.dump(entity, open(filename, 'w'), indent=2)
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return entity
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def commons_uri_to_filename(uri):
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return urllib.parse.unquote(drop_start(uri, commons_start))
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def image_detail(filenames, thumbheight=None, thumbwidth=None):
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if not isinstance(filenames, list):
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filenames = [filenames]
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if not filenames:
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return {}
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params = {
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'action': 'query',
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'titles': '|'.join(f'File:{f}' for f in filenames),
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'prop': 'imageinfo',
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'iiprop': 'url',
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}
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if thumbheight is not None:
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params['iiurlheight'] = thumbheight
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if thumbwidth is not None:
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params['iiurlwidth'] = thumbwidth
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r = api_call(params, api_url=commons_url)
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images = {}
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for image in r.json()['query']['pages']:
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filename = drop_start(image['title'], 'File:')
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images[filename] = image['imageinfo'][0]
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return images
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def image_detail_old(filenames, thumbwidth=None):
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if not isinstance(filenames, list):
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filenames = [filenames]
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params = {'image': '|'.join(filenames)}
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if thumbwidth is not None:
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params['thumbwidth'] = thumbwidth
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r = requests.get(commons_api_url, params=params)
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xml = r.text
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# workaround a bug in the commons API
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# the API doesn't encode " in filenames
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for f in filenames:
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if '"' not in f:
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continue
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esc = f.replace('"', '"')
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xml = xml.replace(f'name="{f}"', f'name="{esc}"')
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# print(xml)
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root = lxml.etree.fromstring(xml.encode('utf-8'))
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images = []
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for image in root:
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if image.tag == 'image':
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file_element = image.find('./file')
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elif image.tag == 'file':
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file_element = image
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else:
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continue
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thumb_element = file_element.find('./urls/thumbnail')
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image = {
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'name': image.get('name'),
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'image': file_element.find('./urls/file').text,
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'height': int(file_element.find('./height').text),
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'width': int(file_element.find('./width').text),
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}
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if thumb_element is not None:
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image['thumbnail'] = thumb_element.text
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images.append(image)
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return images
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# def commons_filename(row):
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# image = row['image']['value']
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# assert image.startswith(commons_start)
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# return urllib.parse.unquote(image[len(commons_start):])
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#
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# def commons_api(row):
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# params = {
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# 'image': commons_filename(row),
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# 'thumbwidth': thumbwidth,
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# }
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# r = requests.get(commons_api_url, params=params)
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# return r
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#
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# def get_commons(row):
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# r = commons_api(row)
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# root = lxml.etree.fromstring(r.content)
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#
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# return root.find('./file/urls/thumbnail').text
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@app.route("/next/Q<int:item_id>")
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def next_page(item_id):
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qid = f'Q{item_id}'
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entity = get_entity_with_cache(qid)
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width = 800
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image_filename = entity['claims']['P18'][0]['mainsnak']['datavalue']['value']
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filename = f'cache/{qid}_{width}_image.json'
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if os.path.exists(filename):
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detail = json.load(open(filename))
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else:
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detail = image_detail([image_filename], thumbwidth=width)
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json.dump(detail, open(filename, 'w'), indent=2)
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other_items = set()
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for key in find_more_props.keys():
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if key not in entity['claims']:
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continue
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for claim in entity['claims'][key]:
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other_items.add(claim['mainsnak']['datavalue']['value']['id'])
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item_labels = get_labels(other_items)
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if 'en' in entity['labels']:
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label = entity['labels']['en']['value']
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elif len(entity['labels']) == 1:
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label = list(entity['labels'].values())[0]['value']
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else:
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label = 'title missing'
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return render_template('next.html',
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qid=qid,
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label=label,
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image=detail[image_filename],
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labels=find_more_props,
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other=item_labels,
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entity=entity)
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@app.route('/P<int:property_id>/Q<int:item_id>')
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def find_more_page(property_id, item_id):
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pid, qid = f'P{property_id}', f'Q{item_id}'
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item_entity = get_entity_with_cache(qid)
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property_keys = item_entity['claims'].keys()
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property_labels = get_labels(property_keys, name=f'{qid}_property_labels')
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query = find_more_query.replace('QID', qid).replace('PID', pid)
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filename = f'cache/{pid}_{qid}.json'
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if os.path.exists(filename):
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bindings = json.load(open(filename))
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else:
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r = run_wikidata_query(query)
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bindings = r.json()['results']['bindings']
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json.dump(bindings, open(filename, 'w'), indent=2)
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page_size = 45
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item_map = {}
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for row in bindings:
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item_id = row_id(row)
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row_qid = f'Q{item_id}'
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label = row['itemLabel']['value']
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image_filename = commons_uri_to_filename(row['image']['value'])
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if item_id in item_map:
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item = item_map[item_id]
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item['image_filename'].append(image_filename)
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continue
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if label == row_qid:
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if 'title' in row:
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label = row['title']['value']
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else:
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label = 'name missing'
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if 'artistLabel' in row:
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artist_name = row['artistLabel']['value']
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else:
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artist_name = '[artist unknown]'
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if 'time' in row:
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t = dateutil.parser.parse(row['time']['value'])
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precision = int(row['timeprecision']['value'])
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print((row['time']['value'], precision))
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if precision == 9:
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d = t.year
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elif precision == 8:
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d = f'{t.year}s'
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elif precision == 7:
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d = f'{ordinal((t.year // 100) + 1)} century'
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elif precision == 6:
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d = f'{ordinal((t.year // 1000) + 1)} millennium'
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else:
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d = row['time']['value']
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else:
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d = None
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item = {
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'url': url_for('next_page', item_id=item_id),
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'image_filename': [image_filename],
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'item_id': item_id,
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'qid': row_qid,
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'label': label,
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'date': d,
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'artist_name': artist_name,
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}
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item_map[item_id] = item
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items = []
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for item in item_map.values():
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if len(item['image_filename']) != 1:
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continue
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item['image_filename'] = item['image_filename'][0]
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items.append(item)
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if len(items) >= page_size:
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break
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filenames = [cur['image_filename'] for cur in items]
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filename = f'cache/{pid}_{qid}_{page_size}_images.json'
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if os.path.exists(filename):
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detail = json.load(open(filename))
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else:
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detail = image_detail(filenames, thumbwidth=thumbwidth)
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json.dump(detail, open(filename, 'w'), indent=2)
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for item in items:
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item['image'] = detail[item['image_filename']]
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total = len(bindings)
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return render_template('find_more.html',
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qid=qid,
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pid=pid,
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item_entity=item_entity,
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property_labels=property_labels,
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labels=find_more_props,
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bindings=bindings,
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items=items,
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total=total)
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if __name__ == "__main__":
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app.debug = True
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app.run(host='0.0.0.0', debug=True)
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# server = Server(app.wsgi_app)
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# server.watch('template/*')
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# server.serve()
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