devicehub-django/evidence/xapian.py

57 lines
1.6 KiB
Python

import xapian
# database = xapian.WritableDatabase("db", xapian.DB_CREATE_OR_OPEN)
# Read Only
# database = xapian.Database("db")
# indexer = xapian.TermGenerator()
# stemmer = xapian.Stem("english")
# indexer.set_stemmer(stemmer)
def search(institution, qs, offset=0, limit=10):
try:
database = xapian.Database("db")
except (xapian.DatabaseNotFoundError, xapian.DatabaseOpeningError):
return
qp = xapian.QueryParser()
qp.set_database(database)
qp.set_stemmer(xapian.Stem("english"))
qp.set_stemming_strategy(xapian.QueryParser.STEM_SOME)
qp.add_prefix("uuid", "uuid")
query = qp.parse_query(qs)
institution_term = "U{}".format(institution.id)
final_query = xapian.Query(
xapian.Query.OP_AND, query, xapian.Query(institution_term)
)
enquire = xapian.Enquire(database)
enquire.set_query(final_query)
matches = enquire.get_mset(offset, limit)
return matches
def index(institution, uuid, snap):
uuid = 'uuid:"{}"'.format(uuid)
matches = search(institution, uuid, limit=1)
if matches and matches.size() > 0:
return
database = xapian.WritableDatabase("db", xapian.DB_CREATE_OR_OPEN)
indexer = xapian.TermGenerator()
stemmer = xapian.Stem("english")
indexer.set_stemmer(stemmer)
doc = xapian.Document()
doc.set_data(snap)
indexer.set_document(doc)
indexer.index_text(snap)
indexer.index_text(uuid, 10, "uuid")
# indexer.index_text(snap, 1, "snapshot")
institution_term = "U{}".format(institution.id)
doc.add_term(institution_term)
database.add_document(doc)