[enh] add infoboxes and answers

1 files changed, 193 insertions, 0 deletions

diff --git a/searx/engines/wikidata.py b/searx/engines/wikidata.py
new file mode 100644
index 000000000..a5ee44246
--- /dev/null
+++ b/searx/engines/wikidata.py
@@ -0,0 +1,193 @@
+import json
+from datetime import datetime
+from requests import get
+from urllib import urlencode
+
+resultCount=2
+urlSearch = 'https://www.wikidata.org/w/api.php?action=query&list=search&format=json&srnamespace=0&srprop=sectionsnippet&{query}'
+urlDetail = 'https://www.wikidata.org/w/api.php?action=wbgetentities&format=json&props=labels%7Cinfo%7Csitelinks%7Csitelinks%2Furls%7Cdescriptions%7Cclaims&{query}'
+# find the right URL for urlMap
+urlMap = 'http://www.openstreetmap.org/?lat={latitude}&lon={longitude}&zoom={zoom}&layers=M'
+
+def request(query, params):
+    params['url'] = urlSearch.format(query=urlencode({'srsearch': query, 'srlimit': resultCount}))
+    print params['url']
+    return params
+
+
+def response(resp):
+    results = []
+    search_res = json.loads(resp.text)
+    # TODO parallel http queries
+    before = datetime.now()
+    for r in search_res.get('query', {}).get('search', {}):
+        wikidata_id = r.get('title', '')
+        results = results + getDetail(wikidata_id)
+    after = datetime.now()
+    print str(after - before) + " second(s)"
+
+    return results
+
+def getDetail(wikidata_id):
+    language = 'fr'
+
+    url = urlDetail.format(query=urlencode({'ids': wikidata_id, 'languages': language + '|en'}))
+    print url
+    response = get(url)
+    result = json.loads(response.content)
+    result = result.get('entities', {}).get(wikidata_id, {})
+    
+    title = result.get('labels', {}).get(language, {}).get('value', None)
+    if title == None:
+        title = result.get('labels', {}).get('en', {}).get('value', wikidata_id)
+    results = []
+    urls = []
+    attributes = []
+
+    description = result.get('descriptions', {}).get(language, {}).get('value', '')
+    if description == '':
+        description = result.get('descriptions', {}).get('en', {}).get('value', '')
+
+    claims = result.get('claims', {})
+    official_website = get_string(claims, 'P856', None)
+    print official_website
+    if official_website != None:
+        urls.append({ 'title' : 'Official site', 'url': official_website })
+        results.append({ 'title': title, 'url' : official_website })
+
+    if language != 'en':
+        add_url(urls, 'Wikipedia (' + language + ')', get_wikilink(result, language + 'wiki'))
+    wikipedia_en_link = get_wikilink(result, 'enwiki')
+    add_url(urls, 'Wikipedia (en)', wikipedia_en_link)
+
+    if language != 'en':
+        add_url(urls, 'Wiki voyage (' + language + ')', get_wikilink(result, language + 'wikivoyage'))
+    add_url(urls, 'Wiki voyage (en)', get_wikilink(result, 'enwikivoyage'))
+
+    if language != 'en':
+        add_url(urls, 'Wikiquote (' + language + ')', get_wikilink(result, language + 'wikiquote'))
+    add_url(urls, 'Wikiquote (en)', get_wikilink(result, 'enwikiquote'))
+
+
+    add_url(urls, 'Commons wiki', get_wikilink(result, 'commonswiki'))
+
+    add_url(urls, 'Location', get_geolink(claims, 'P625', None))
+
+    add_url(urls, 'Wikidata', 'https://www.wikidata.org/wiki/' + wikidata_id + '?uselang='+ language)
+
+    postal_code = get_string(claims, 'P281', None)
+    if postal_code != None:
+        attributes.append({'label' : 'Postal code(s)', 'value' : postal_code})
+
+    date_of_birth = get_time(claims, 'P569', None)
+    if date_of_birth != None:
+        attributes.append({'label' : 'Date of birth', 'value' : date_of_birth})
+
+    date_of_death = get_time(claims, 'P570', None)
+    if date_of_death != None:
+        attributes.append({'label' : 'Date of death', 'value' : date_of_death})
+
+
+    results.append({
+            'infobox' : title, 
+            'id' : wikipedia_en_link,
+            'content' : description,
+            'attributes' : attributes,
+            'urls' : urls
+            })
+
+    return results
+
+def add_url(urls, title, url):
+    if url != None:
+        urls.append({'title' : title, 'url' : url})
+
+def get_mainsnak(claims, propertyName):
+    propValue = claims.get(propertyName, {})
+    if len(propValue) == 0:
+        return None
+
+    propValue = propValue[0].get('mainsnak', None)
+    return propValue
+
+def get_string(claims, propertyName, defaultValue=None):
+    propValue = claims.get(propertyName, {})
+    if len(propValue) == 0:
+        return defaultValue
+
+    result = []
+    for e in propValue:
+        mainsnak = e.get('mainsnak', {})
+
+        datatype = mainsnak.get('datatype', '')
+        datavalue = mainsnak.get('datavalue', {})
+        if datavalue != None:
+            result.append(datavalue.get('value', ''))
+
+    if len(result) == 0:
+        return defaultValue
+    else:
+        return ', '.join(result)
+
+def get_time(claims, propertyName, defaultValue=None):
+    propValue = claims.get(propertyName, {})
+    if len(propValue) == 0:
+        return defaultValue
+
+    result = []
+    for e in propValue:
+        mainsnak = e.get('mainsnak', {})
+
+        datatype = mainsnak.get('datatype', '')
+        datavalue = mainsnak.get('datavalue', {})
+        if datavalue != None:
+            value = datavalue.get('value', '')
+            result.append(value.get('time', ''))
+
+    if len(result) == 0:
+        return defaultValue
+    else:
+        return ', '.join(result)
+
+def get_geolink(claims, propertyName, defaultValue=''):
+    mainsnak = get_mainsnak(claims, propertyName)
+
+    if mainsnak == None:
+        return defaultValue
+
+    datatype = mainsnak.get('datatype', '')
+    datavalue = mainsnak.get('datavalue', {})
+
+    if datatype != 'globe-coordinate':
+        return defaultValue
+
+    value = datavalue.get('value', {})
+
+    precision = value.get('precision', 0.0002)
+
+    # there is no zoom information, deduce from precision (error prone)    
+    # samples :
+    # 13 --> 5
+    # 1 --> 6
+    # 0.016666666666667 --> 9
+    # 0.00027777777777778 --> 19
+    # wolframalpha : quadratic fit { {13, 5}, {1, 6}, {0.0166666, 9}, {0.0002777777,19}}
+    # 14.1186-8.8322 x+0.625447 x^2
+    if precision < 0.0003:
+        zoom = 19
+    else:
+        zoom = int(15 - precision*8.8322 + precision*precision*0.625447)
+
+    url = urlMap.replace('{latitude}', str(value.get('latitude',0))).replace('{longitude}', str(value.get('longitude',0))).replace('{zoom}', str(zoom))
+
+    return url
+
+def get_wikilink(result, wikiid):
+    url = result.get('sitelinks', {}).get(wikiid, {}).get('url', None)
+    if url == None:
+        return url
+    elif url.startswith('http://'):
+        url = url.replace('http://', 'https://')
+    elif url.startswith('//'):
+        url = 'https:' + url
+    return url