def GetQueryPrefixes(self, query):
LogManager.LogInfo(f"Extracting prefixes from query...")
prefixes = []
inlineQuery = query.replace('\n', ' ').replace('\t', '')
queryRegex = r'(.*)[Ss][Ee][Ll][Ee][Cc][Tt](.*)'
matchPrefixes = re.match(queryRegex, inlineQuery)
if not matchPrefixes:
LogManager.LogInfo(f"No prefixes found")
return None
allPrefixes = matchPrefixes.group(1)
nPrefixes = [i.lstrip(' ') for i in allPrefixes.split('>') if i != ' ']
nPrefixes = [i + '>' for i in nPrefixes if i != '']
for prefix in nPrefixes:
prefxRegex = '[Pp][Rr][Ee][Ff][Ii][Xx](.*?):'
matchPrefix = re.match(prefxRegex, prefix)
if not matchPrefix:
LogManager.LogError("Invalid Prefixes")
return None
prefixes.append((matchPrefix.group(1).lstrip(' '), prefix))
LogManager.LogInfo(
f"Prefixes extracted successfully! Prefixes: {prefixes}")
return prefixes
def GetQueryTriples(self, query):
LogManager.LogInfo(f"Extracting triples from query...")
triples = []
inlineQuery = query.replace('\n', ' ').replace('\t', '')
allTriples = inlineQuery[inlineQuery.find("{") +
1:inlineQuery.find("}")]
allTriples = re.sub(r'\([^)]*\)', '', allTriples)
removeFilter = re.compile(re.escape('filter'), re.IGNORECASE)
allTriples = removeFilter.sub('', allTriples)
nTriples = [i for i in shlex.split(allTriples) if i != '.']
if len(nTriples) % 3 != 0:
self.queryIsValid = False
self.queryError = f"Invalid triples format on query: {nTriples}"
LogManager.LogInfo(self.queryError)
return None
triplesNum = len(nTriples) // 3
for i in range(triplesNum + 1):
if i != 0:
i = (i * 3) - 1
sub = nTriples[i - 2]
pred = nTriples[i - 1]
obj = nTriples[i]
triples.append((sub, pred, obj))
LogManager.LogInfo(
f"Triples extracted successfully! Triples: {triples}")
return triples
def ValidateQuery(self, query):
LogManager.LogInfo(f"Validating query: {query}")
inlineQuery = query.replace('\n', ' ').replace('\t',
'').replace(' ', '')
queryRegex = r'(.*)[Ss][Ee][Ll][Ee][Cc][Tt](.*)[Ww][Hh][Ee][Rr][Ee]{(.*)}(.*)'
matchQuery = re.match(queryRegex, inlineQuery)
if matchQuery:
LogManager.LogInfo(f"Query structure is valid")
return True
else:
return False
def GetQueryAnswers(self):
LogManager.LogInfo(f"Getting query answer from endpoint...")
answers = []
for result in self.serverAnswer["results"]["bindings"]:
answers.append(result[self.queryVariable[0]]["value"])
if len(answers) == 0:
LogManager.LogInfo(f"No answer from endpoint")
return None
return answers
def GetPredicateAnswer(self, variable, triples, answers,
isVariablePosSubject):
LogManager.LogInfo(f"Getting main predicate for verbalizer...")
var = '?' + variable
isNounPlural = True if len(answers) > 1 else False
isVerbInfiniteForm = True if len(
answers) > 1 and isVariablePosSubject else False
isAccusative = True
if isVariablePosSubject:
# TODO Implement case when query variable is subject
return ''
else:
answerTriple = [tri for tri in triples if var == tri[2]]
predicate = answerTriple[0][1]
if predicate != None:
predicate = predicate.rsplit('/', 1)[-1].lstrip('<').rstrip(
'>') if 'http' in predicate else predicate.strip(
'"').split(':')[1]
if '_' in predicate:
return Dict.CheckPredicates(predicate.split('_'),
isVerbInfiniteForm,
isNounPlural, isAccusative)
splitPredicate = SplitWords.split(predicate)
return Dict.CheckPredicates(
[predicate], isVerbInfiniteForm, isNounPlural, isAccusative
) if splitPredicate == predicate else Dict.CheckPredicates(
[word.lower() for word in splitPredicate],
isVerbInfiniteForm, isNounPlural, isAccusative)
else:
return ''
# TODO Split predicate if it consists from more than 2 words
return predicate
def GetSubjectLabel(self, variable, triples, isVariablePosSubject):
LogManager.LogInfo(f"Getting label for subject...")
var = '?' + variable
allQueryLabels = [
'rdfs:label', '<http://www.w3.org/2000/01/rdf-schema#label>'
]
if isVariablePosSubject:
# TODO Implement case when query variable is subject
return ''
else:
answerTriple = [tri for tri in triples if var == tri[2]]
subj = answerTriple[0][0]
subjLabel = [
tri[2] for tri in triples
if subj == tri[0] and tri[1] in allQueryLabels
]
if subjLabel:
if not subjLabel[0].startswith('?'):
return subjLabel[0].strip('"').split('"')[0]
else:
# TODO label should be somewhere in query e.g. FILTER, use regex to extract it
return ''
elif '<http' in subj:
return subj.rsplit('/', 1)[-1].lstrip('<').rstrip('>')
elif ':' in subj:
return subj.strip('"').split(':')[1]
else:
# TODO Send query to endpoint to get label
return ''
def GetSubjectArtikel(self, type):
LogManager.LogInfo(f"Getting artikel for subject type...")
if type == '' or type == None:
return ''
else:
newType = Dict.CheckType(type)
return newType.title() if any(
x in newType for x in ['der', 'die', 'das']) else 'Der ' + type
def init(endpoint="http://dbpedia.org/sparql"):
LogManager.LogInfo(f"Initializing SPARQLEndpointManager...")
try:
SPARQLEndpointManager.endpoint = endpoint
SPARQLEndpointManager.sparql = SPARQLWrapper(endpoint)
except Exception as e:
LogManager.LogError(f"Failed to initialize SPARQLEndpointManager")
LogManager.LogError(e)
def __init__(self, query):
LogManager.LogInfo(f"Starting Verbalize Manager...")
self.answer = None
self.parser = SPARQLParserManager(query)
if self.parser.queryIsValid:
self.answer = self.Verbalize(self.parser.queryVariable[0],
self.parser.queryTriples,
self.parser.queryAnswer,
self.parser.queryPrefixes)
else:
LogManager.LogError(f"Invalid query syntax for query:\n{query}")
self.answer = self.parser.queryError
def SendQuery(query, returnFormat=JSON):
LogManager.LogInfo(
f"Sending query to endpoint {SPARQLEndpointManager.endpoint}")
try:
SPARQLEndpointManager.sparql.setQuery(query)
SPARQLEndpointManager.sparql.setReturnFormat(returnFormat)
results = SPARQLEndpointManager.sparql.query().convert()
return results
except Exception as e:
LogManager.LogError(
f"Unable to Send query to {SPARQLEndpointManager.endpoint}")
LogManager.LogError(e)
return None
def GetSubjectType(self, variable, triples, prefixes,
isVariablePosSubject):
LogManager.LogInfo(f"Getting type of subject...")
var = '?' + variable
allRdfTypes = [
'a', 'rdf:type',
'<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>'
]
allRdfLabels = [
'rdfs:label', '<http://www.w3.org/2000/01/rdf-schema#label>'
]
if isVariablePosSubject:
# TODO Implement case when query variable is subject
return ''
else:
answerTriple = [tri for tri in triples if var == tri[2]]
subj = answerTriple[0][0]
subjType = [
tri[2] for tri in triples
if subj == tri[0] and tri[1] in allRdfTypes
]
if subjType and not subjType[0].startswith('?'):
return subjType[0].rsplit('/', 1)[-1].lstrip('<').rstrip(
'>') if '<http' in subjType[0] else subjType[0].strip(
'"').split(':')[1]
else:
if 'http' in subj or ':' in subj:
return SPARQLEndpointManager.SendQueryForLabel(
subj, prefixes)
elif subj.startswith('?'):
labelTriple = [
tri for tri in triples
if subj == tri[0] and tri[1] in allRdfLabels
and not tri[2].startswith('?')
]
if not labelTriple:
return ''
else:
queryType = SPARQLEndpointManager.SendQueryForType(
subj, labelTriple, prefixes)
return queryType.rsplit('/', 1)[-1] if 'http' in queryType else \
queryType if queryType is not None else ''
else:
return ''
def SendQueryForLabel(variable, prefixes='', returnFormat=JSON):
LogManager.LogInfo(
f"Sending query to endpoint {SPARQLEndpointManager.endpoint} for getting label of {variable}"
)
stringPrefixes = [pref[1]
for pref in prefixes] if prefixes != '' else ['']
query = ' '.join(
stringPrefixes
) + ' SELECT ?label WHERE { ' + variable + ' <http://www.w3.org/2000/01/rdf-schema#label> ' + '?label . }'
try:
SPARQLEndpointManager.sparql.setQuery(query)
SPARQLEndpointManager.sparql.setReturnFormat(returnFormat)
results = SPARQLEndpointManager.sparql.query().convert()
return results["results"]["bindings"][0]["label"]["value"] if len(
results["results"]["bindings"]) > 0 else ''
except Exception as e:
LogManager.LogError(
f"Unable to Send query to {SPARQLEndpointManager.endpoint}")
LogManager.LogError(e)
return None
def ParseQuery(self, query):
LogManager.LogInfo(f"Parsing SPARQL query...")
self.queryIsValid = self.ValidateQuery(query)
self.serverAnswer = SPARQLEndpointManager.SendQuery(query)
if self.serverAnswer is None: self.queryIsValid = False
if self.queryIsValid:
self.queryPrefixes = self.GetQueryPrefixes(query)
self.queryTriples = self.GetQueryTriples(query)
if self.queryIsValid:
self.queryVariable = self.GetQueryVariables()
if len(self.queryVariable) == 1:
self.queryAnswer = self.GetQueryAnswers()
if self.queryAnswer == None:
self.queryIsValid = False
self.queryError = f"Die Abfrage hat keine Antwort."
else:
self.queryIsValid = False
self.queryError = f"Sie können nur eine Variable abfragen. {self.queryVariable}\nAbfragen Antwort: {self.serverAnswer}"
else:
self.queryError = f"Ungültige Abfragesyntax. Wir unterstützen nur Abfragen vom Typ 'SELECT'."
def init(queriesNum=10):
LogManager.LogInfo(
f"Initializing XMLManager and getting latest version and queries..."
)
try:
VersionHistory = ET.parse('VersionHistory.xml')
Versions = [
Version for Version in VersionHistory.findall('Version')
]
XMLManager.latestVersion = Versions[-1].attrib['ID']
except IOError:
LogManager.LogError(f"Unable to get latest version from file")
try:
XMLManager.sampleQueriesNum = queriesNum
SolideQueries = ET.parse('queries.xml')
XMLManager.queries = [
(question[0].text, question[1].text)
for question in SolideQueries.findall('question')
]
XMLManager.labels = [label[0] for label in XMLManager.queries]
except IOError:
LogManager.LogError(f"Unable to get queries from file")
def SendQueryForType(variable,
labelTriple,
prefixes='',
returnFormat=JSON):
LogManager.LogInfo(
f"Sending query to endpoint {SPARQLEndpointManager.endpoint} for getting type of {variable}"
)
stringLabelTriple = f'{labelTriple[0][0]} {labelTriple[0][1]} "{labelTriple[0][2]}"'
stringPrefixes = [pref[1]
for pref in prefixes] if prefixes != '' else ['']
query = ' '.join(
stringPrefixes
) + ' SELECT DISTINCT ?type WHERE { ' + variable + ' <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> ' + '?type . ' + stringLabelTriple + ' } LIMIT 1'
try:
SPARQLEndpointManager.sparql.setQuery(query)
SPARQLEndpointManager.sparql.setReturnFormat(returnFormat)
results = SPARQLEndpointManager.sparql.query().convert()
return results["results"]["bindings"][0]["type"]["value"] if len(
results["results"]["bindings"]) > 0 else ''
except Exception as e:
LogManager.LogError(
f"Unable to Send query to {SPARQLEndpointManager.endpoint}")
LogManager.LogError(e)
return None
def GetQueryVariables(self):
LogManager.LogInfo(
f"Extracting query variable from endpoint answer...")
return self.serverAnswer["head"]["vars"]
from flask import Flask, render_template, request, get_template_attribute
from models.LogManager import LogManager
from models.XMLManager import XMLManager
from models.SPARQLEndpointManager import SPARQLEndpointManager
from models.VerbalizeManager import VerbalizeManager
import json
LogManager.init()
XMLManager.init()
SPARQLEndpointManager.init("http://127.0.0.1:3030/solide/sparql")
LogManager.LogInfo('Starting Flask Application...')
app = Flask(__name__)
@app.route('/')
def index():
return render_template('index.html', labels=XMLManager.GetRandomLabels(), version=XMLManager.GetLatestVersion())
@app.route('/', methods=['POST'])
def PostRequests():
if 'query' in request.form :
sparqlQuery = request.form['query']
verbilizer = VerbalizeManager(sparqlQuery)
return str(verbilizer.answer)
elif 'label' in request.form:
label = request.form['label']
queryLabel = XMLManager.GetSpecificQuery(label)
return queryLabel
elif 'sample' in request.form:
sampleQueries = XMLManager.GetRandomLabels()
def ConcatenateAnswer(self, subjWithArticle, subjLabel, predicate, answer):
LogManager.LogInfo(f"Constructing final verbalized answer...")
return subjWithArticle + ' ' + subjLabel + ' ' + str(
predicate) + ' ' + str(answer) + '.'