X-Git-Url: https://git.mdrn.pl/wolnelektury.git/blobdiff_plain/1cf1830b0f97f0c517862c8a2030e2fc4d76108e..5c3f2f665243a32510f8097bf6c0582fc14d2fd3:/apps/search/index.py diff --git a/apps/search/index.py b/apps/search/index.py index 94e6f099c..42a271e02 100644 --- a/apps/search/index.py +++ b/apps/search/index.py @@ -1,11 +1,44 @@ - +# -*- coding: utf-8 -*- from django.conf import settings -from lucene import SimpleFSDirectory, IndexWriter, File, Field, NumericField, PolishAnalyzer, \ - Version, Document, JavaError, IndexSearcher, QueryParser, Term +from lucene import SimpleFSDirectory, IndexWriter, File, Field, \ + NumericField, Version, Document, JavaError, IndexSearcher, \ + QueryParser, Term, PerFieldAnalyzerWrapper, \ + SimpleAnalyzer, PolishAnalyzer, ArrayList, \ + KeywordAnalyzer, NumericRangeQuery, BooleanQuery, \ + BlockJoinQuery, BlockJoinCollector, TermsFilter, \ + HashSet, BooleanClause, Term, CharTermAttribute, \ + PhraseQuery, StringReader, TermQuery + # KeywordAnalyzer +import sys import os import errno from librarian import dcparser -from catalogue.models import Book +from librarian.parser import WLDocument +import catalogue.models +from multiprocessing.pool import ThreadPool +import atexit + + +class WLAnalyzer(PerFieldAnalyzerWrapper): + def __init__(self): + polish = PolishAnalyzer(Version.LUCENE_34) + simple = SimpleAnalyzer(Version.LUCENE_34) + keyword = KeywordAnalyzer(Version.LUCENE_34) + # not sure if needed: there's NOT_ANALYZED meaning basically the same + + PerFieldAnalyzerWrapper.__init__(self, polish) + + self.addAnalyzer("tags", simple) + self.addAnalyzer("technical_editors", simple) + self.addAnalyzer("editors", simple) + self.addAnalyzer("url", keyword) + self.addAnalyzer("source_url", keyword) + self.addAnalyzer("source_name", simple) + self.addAnalyzer("publisher", simple) + self.addAnalyzer("author", simple) + self.addAnalyzer("is_book", keyword) + + #self.addanalyzer("fragment_anchor", keyword) class IndexStore(object): @@ -23,31 +56,71 @@ class IndexStore(object): class Index(IndexStore): - def __init__(self): + def __init__(self, analyzer=None): IndexStore.__init__(self) self.index = None + if not analyzer: + analyzer = WLAnalyzer() + self.analyzer = analyzer def open(self, analyzer=None): - if not analyzer: - analyzer = PolishAnalyzer(Version.LUCENE_34) if self.index: raise Exception("Index is already opened") - self.index = IndexWriter(self.store, analyzer, IndexWriter.MaxFieldLength.LIMITED) + self.index = IndexWriter(self.store, self.analyzer,\ + IndexWriter.MaxFieldLength.LIMITED) return self.index def close(self): self.index.optimize() self.index.close() + self.index = None - def index_book(self, book, overwrite=True): - book_info = dcparser.parse(book.xml_file) + def remove_book(self, book): + q = NumericRangeQuery.newIntRange("book_id", book.id, book.id, True,True) + self.index.deleteDocuments(q) + def index_book(self, book, overwrite=True): if overwrite: - self.index.deleteDocuments(Term("id", str(book.id))) + self.remove_book(book) + + + doc = self.extract_metadata(book) + parts = self.extract_content(book) + block = ArrayList().of_(Document) + + for p in parts: + block.add(p) + block.add(doc) + self.index.addDocuments(block) + master_tags = [ + 'opowiadanie', + 'powiesc', + 'dramat_wierszowany_l', + 'dramat_wierszowany_lp', + 'dramat_wspolczesny', 'liryka_l', 'liryka_lp', + 'wywiad' + ] + + skip_header_tags = ['autor_utworu', 'nazwa_utworu'] + + def create_book_doc(self, book): + """ + Create a lucene document connected to the book + """ doc = Document() - doc.add(NumericField("id", Field.Store.YES, True).setIntValue(book.id)) + doc.add(NumericField("book_id", Field.Store.YES, True).setIntValue(book.id)) + if book.parent is not None: + doc.add(NumericField("parent_id", Field.Store.YES, True).setIntValue(book.parent.id)) + return doc + + def extract_metadata(self, book): + book_info = dcparser.parse(book.xml_file) + + doc = self.create_book_doc(book) doc.add(Field("slug", book.slug, Field.Store.NO, Field.Index.ANALYZED_NO_NORMS)) + doc.add(Field("tags", ','.join([t.name for t in book.tags]), Field.Store.NO, Field.Index.ANALYZED)) + doc.add(Field("is_book", 'true', Field.Store.NO, Field.Index.NOT_ANALYZED)) # validator, name for field in dcparser.BookInfo.FIELDS: @@ -67,15 +140,98 @@ class Index(IndexStore): elif type_indicator == dcparser.as_person: p = getattr(book_info, field.name) if isinstance(p, dcparser.Person): - persons = str(p) + persons = unicode(p) else: - persons = ', '.join(map(str, p)) + persons = ', '.join(map(unicode, p)) doc.add(Field(field.name, persons, Field.Store.NO, Field.Index.ANALYZED)) elif type_indicator == dcparser.as_date: dt = getattr(book_info, field.name) doc.add(Field(field.name, "%04d%02d%02d" % (dt.year, dt.month, dt.day), Field.Store.NO, Field.Index.NOT_ANALYZED)) + return doc + + def get_master(self, root): + for master in root.iter(): + if master.tag in self.master_tags: + return master + + + def extract_content(self, book): + wld = WLDocument.from_file(book.xml_file.path) + root = wld.edoc.getroot() + + # first we build a sequence of top-level items. + # book_id + # header_index - the 0-indexed position of header element. + # content + master = self.get_master(root) + if master is None: + return [] + + header_docs = [] + for header, position in zip(list(master), range(len(master))): + if header.tag in self.skip_header_tags: + continue + doc = self.create_book_doc(book) + doc.add(NumericField("header_index", Field.Store.YES, True).setIntValue(position)) + doc.add(Field("header_type", header.tag, Field.Store.YES, Field.Index.NOT_ANALYZED)) + content = u' '.join([t for t in header.itertext()]) + doc.add(Field("content", content, Field.Store.NO, Field.Index.ANALYZED)) + header_docs.append(doc) + + def walker(node): + yield node, None + for child in list(node): + for b, e in walker(child): + yield b, e + yield None, node + return + + # Then we create a document for each fragments + # fragment_anchor - the anchor + # themes - list of themes [not indexed] + fragment_docs = [] + # will contain (framgent id -> { content: [], themes: [] } + fragments = {} + for start, end in walker(master): + if start is not None and start.tag == 'begin': + fid = start.attrib['id'][1:] + fragments[fid] = {'content': [], 'themes': []} + fragments[fid]['content'].append(start.tail) + elif start is not None and start.tag == 'motyw': + fid = start.attrib['id'][1:] + fragments[fid]['themes'].append(start.text) + fragments[fid]['content'].append(start.tail) + elif start is not None and start.tag == 'end': + fid = start.attrib['id'][1:] + if fid not in fragments: + continue # a broken node, skip it + frag = fragments[fid] + del fragments[fid] + + def jstr(l): + return u' '.join(map( + lambda x: x == None and u'(none)' or unicode(x), + l)) + + doc = self.create_book_doc(book) + doc.add(Field("fragment_anchor", fid, + Field.Store.YES, Field.Index.NOT_ANALYZED)) + doc.add(Field("content", + u' '.join(filter(lambda s: s is not None, frag['content'])), + Field.Store.NO, Field.Index.ANALYZED)) + doc.add(Field("themes", + u' '.join(filter(lambda s: s is not None, frag['themes'])), + Field.Store.NO, Field.Index.ANALYZED)) + + fragment_docs.append(doc) + elif start is not None: + for frag in fragments.values(): + frag['content'].append(start.text) + elif end is not None: + for frag in fragments.values(): + frag['content'].append(end.tail) - self.index.addDocument(doc) + return header_docs + fragment_docs def __enter__(self): self.open() @@ -85,17 +241,86 @@ class Index(IndexStore): self.close() +class ReusableIndex(Index): + """ + Works like index, but does not close/optimize Lucene index + until program exit (uses atexit hook). + This is usefull for importbooks command. + + if you cannot rely on atexit, use ReusableIndex.close_reusable() yourself. + """ + index = None + pool = None + pool_jobs = None + + def open(self, analyzer=None, threads=4): + if ReusableIndex.index is not None: + self.index = ReusableIndex.index + else: + ReusableIndex.pool = ThreadPool(threads) + ReusableIndex.pool_jobs = [] + Index.open(self, analyzer) + ReusableIndex.index = self.index + atexit.register(ReusableIndex.close_reusable) + + def index_book(self, *args, **kw): + job = ReusableIndex.pool.apply_async(Index.index_book, (self,)+ args, kw) + ReusableIndex.pool_jobs.append(job) + + @staticmethod + def close_reusable(): + if ReusableIndex.index is not None: + for job in ReusableIndex.pool_jobs: + job.wait() + ReusableIndex.pool.close() + + ReusableIndex.index.optimize() + ReusableIndex.index.close() + ReusableIndex.index = None + + def close(self): + pass + + class Search(IndexStore): - def __init__(self, default_field="description"): + def __init__(self, default_field="content"): IndexStore.__init__(self) self.analyzer = PolishAnalyzer(Version.LUCENE_34) + ## self.analyzer = WLAnalyzer() self.searcher = IndexSearcher(self.store, True) - self.parser = QueryParser(Version.LUCENE_34, default_field, self.analyzer) + self.parser = QueryParser(Version.LUCENE_34, default_field, + self.analyzer) + + self.parent_filter = TermsFilter() + self.parent_filter.addTerm(Term("is_book", "true")) def query(self, query): return self.parser.parse(query) - def search(self, query, max_results=50): + def wrapjoins(self, query, fields=[]): + """ + This functions modifies the query in a recursive way, + so Term and Phrase Queries contained, which match + provided fields are wrapped in a BlockJoinQuery, + and so delegated to children documents. + """ + if BooleanQuery.instance_(query): + qs = BooleanQuery.cast_(query) + for clause in qs: + clause = BooleanClause.cast_(clause) + clause.setQuery(self.wrapjoins(clause.getQuery(), fields)) + return qs + else: + termset = HashSet() + query.extractTerms(termset) + for t in termset: + t = Term.cast_(t) + if t.field() not in fields: + return query + return BlockJoinQuery(query, self.parent_filter, + BlockJoinQuery.ScoreMode.Total) + + def simple_search(self, query, max_results=50): """Returns (books, total_hits) """ @@ -103,5 +328,128 @@ class Search(IndexStore): bks = [] for found in tops.scoreDocs: doc = self.searcher.doc(found.doc) - bks.append(Book.objects.get(id=doc.get("id"))) + bks.append(catalogue.models.Book.objects.get(id=doc.get("book_id"))) + return (bks, tops.totalHits) + + def search(self, query, max_results=50): + query = self.query(query) + query = self.wrapjoins(query, ["content", "themes"]) + + tops = self.searcher.search(query, max_results) + bks = [] + for found in tops.scoreDocs: + doc = self.searcher.doc(found.doc) + bks.append(catalogue.models.Book.objects.get(id=doc.get("book_id"))) + return (bks, tops.totalHits) + + def bsearch(self, query, max_results=50): + q = self.query(query) + bjq = BlockJoinQuery(q, self.parent_filter, BlockJoinQuery.ScoreMode.Avg) + + tops = self.searcher.search(bjq, max_results) + bks = [] + for found in tops.scoreDocs: + doc = self.searcher.doc(found.doc) + bks.append(catalogue.models.Book.objects.get(id=doc.get("book_id"))) + return (bks, tops.totalHits) + +# TokenStream tokenStream = analyzer.tokenStream(fieldName, reader); +# OffsetAttribute offsetAttribute = tokenStream.getAttribute(OffsetAttribute.class); +# CharTermAttribute charTermAttribute = tokenStream.getAttribute(CharTermAttribute.class); + +# while (tokenStream.incrementToken()) { +# int startOffset = offsetAttribute.startOffset(); +# int endOffset = offsetAttribute.endOffset(); +# String term = charTermAttribute.toString(); +# } + + +class MultiSearch(Search): + """Class capable of IMDb-like searching""" + def get_tokens(self, queryreader): + if isinstance(queryreader, str): + queryreader = StringReader(queryreader) + queryreader.reset() + tokens = self.analyzer.reusableTokenStream('content', queryreader) + toks = [] + while tokens.incrementToken(): + cta = tokens.getAttribute(CharTermAttribute.class_) + toks.append(cta.toString()) + return toks + + def make_phrase(self, tokens, field='content', joined=False, slop=2): + phrase = PhraseQuery() + phrase.setSlop(slop) + for t in tokens: + term = Term(field, t) + phrase.add(term) + if joined: + phrase = self.content_query(phrase) + return phrase + + def make_term_query(self, tokens, field='content', modal=BooleanClause.Occur.SHOULD, joined=False): + q = BooleanQuery() + for t in tokens: + term = Term(field, t) + q.add(BooleanClause(TermQuery(term), modal)) + if joined: + self.content_query(q) + return q + + def content_query(self, query): + return BlockJoinQuery(query, self.parent_filter, + BlockJoinQuery.ScoreMode.Total) + + def multisearch(self, query, max_results=50): + """ + Search strategy: + - (phrase) OR -> content + -> title + -> author + - (keywords) -> author + -> motyw + -> tags + -> content + """ + queryreader = StringReader(query) + tokens = self.get_tokens(queryreader) + + top_level = BooleanQuery() + Should = BooleanClause.Occur.SHOULD + + phrase_level = BooleanQuery() + phrase_level.setBoost(1.3) + + p_content = self.make_phrase(tokens, joined=True) + p_title = self.make_phrase(tokens, 'title') + p_author = self.make_phrase(tokens, 'author') + + phrase_level.add(BooleanClause(p_content, Should)) + phrase_level.add(BooleanClause(p_title, Should)) + phrase_level.add(BooleanClause(p_author, Should)) + + kw_level = BooleanQuery() + + kw_level.add(self.make_term_query(tokens, 'author'), Should) + kw_level.add(self.make_term_query(tokens, 'themes', joined=True), Should) + kw_level.add(self.make_term_query(tokens, 'tags'), Should) + kw_level.add(self.make_term_query(tokens, joined=True), Should) + + top_level.add(BooleanClause(phrase_level, Should)) + top_level.add(BooleanClause(kw_level, Should)) + + print self.do_search(phrase_level) + print self.do_search(kw_level) + print self.do_search(top_level) + + def do_search(self, query, max_results=50): + tops = self.searcher.search(query, max_results) + #tops = self.searcher.search(p_content, max_results) + + bks = [] + for found in tops.scoreDocs: + doc = self.searcher.doc(found.doc) + b = catalogue.models.Book.objects.get(id=doc.get("book_id")) + bks.append(b) + print "%s (%d) -> %f" % (b, b.id, found.score) return (bks, tops.totalHits)