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PhabricatorFerretFulltextEngineExtension.php
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Fri, Jul 12, 09:35

PhabricatorFerretFulltextEngineExtension.php
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<?php
final class PhabricatorFerretFulltextEngineExtension
extends PhabricatorFulltextEngineExtension {
const EXTENSIONKEY = 'ferret';
public function getExtensionName() {
return pht('Ferret Fulltext Engine');
}
public function shouldIndexFulltextObject($object) {
return ($object instanceof PhabricatorFerretInterface);
}
public function indexFulltextObject(
$object,
PhabricatorSearchAbstractDocument $document) {
$phid = $document->getPHID();
$engine = $object->newFerretEngine();
$is_closed = 0;
$author_phid = null;
$owner_phid = null;
foreach ($document->getRelationshipData() as $relationship) {
list($related_type, $related_phid) = $relationship;
switch ($related_type) {
case PhabricatorSearchRelationship::RELATIONSHIP_OPEN:
$is_closed = 0;
break;
case PhabricatorSearchRelationship::RELATIONSHIP_CLOSED:
$is_closed = 1;
break;
case PhabricatorSearchRelationship::RELATIONSHIP_OWNER:
$owner_phid = $related_phid;
break;
case PhabricatorSearchRelationship::RELATIONSHIP_UNOWNED:
$owner_phid = null;
break;
case PhabricatorSearchRelationship::RELATIONSHIP_AUTHOR:
$author_phid = $related_phid;
break;
}
}
$stemmer = $engine->newStemmer();
// Copy all of the "title" and "body" fields to create new "core" fields.
// This allows users to search "in title or body" with the "core:" prefix.
$document_fields = $document->getFieldData();
$virtual_fields = array();
foreach ($document_fields as $field) {
$virtual_fields[] = $field;
list($key, $raw_corpus) = $field;
switch ($key) {
case PhabricatorSearchDocumentFieldType::FIELD_TITLE:
case PhabricatorSearchDocumentFieldType::FIELD_BODY:
$virtual_fields[] = array(
PhabricatorSearchDocumentFieldType::FIELD_CORE,
$raw_corpus,
);
break;
}
$virtual_fields[] = array(
PhabricatorSearchDocumentFieldType::FIELD_ALL,
$raw_corpus,
);
}
$empty_template = array(
'raw' => array(),
'term' => array(),
'normal' => array(),
);
$ferret_corpus_map = array();
foreach ($virtual_fields as $field) {
list($key, $raw_corpus) = $field;
if (!strlen($raw_corpus)) {
continue;
}
$term_corpus = $engine->newTermsCorpus($raw_corpus);
$normal_corpus = $stemmer->stemCorpus($raw_corpus);
$normal_corpus = $engine->newTermsCorpus($normal_corpus);
if (!isset($ferret_corpus_map[$key])) {
$ferret_corpus_map[$key] = $empty_template;
}
$ferret_corpus_map[$key]['raw'][] = $raw_corpus;
$ferret_corpus_map[$key]['term'][] = $term_corpus;
$ferret_corpus_map[$key]['normal'][] = $normal_corpus;
}
$ferret_fields = array();
$ngrams_source = array();
foreach ($ferret_corpus_map as $key => $fields) {
$raw_corpus = $fields['raw'];
$raw_corpus = implode("\n", $raw_corpus);
if (strlen($raw_corpus)) {
$ngrams_source[] = $raw_corpus;
}
$normal_corpus = $fields['normal'];
$normal_corpus = implode("\n", $normal_corpus);
if (strlen($normal_corpus)) {
$ngrams_source[] = $normal_corpus;
}
$term_corpus = $fields['term'];
$term_corpus = implode("\n", $term_corpus);
if (strlen($term_corpus)) {
$ngrams_source[] = $term_corpus;
}
$ferret_fields[] = array(
'fieldKey' => $key,
'rawCorpus' => $raw_corpus,
'termCorpus' => $term_corpus,
'normalCorpus' => $normal_corpus,
);
}
$ngrams_source = implode("\n", $ngrams_source);
$ngrams = $engine->getTermNgramsFromString($ngrams_source);
$object->openTransaction();
try {
$conn = $object->establishConnection('w');
$this->deleteOldDocument($engine, $object, $document);
queryfx(
$conn,
'INSERT INTO %T (objectPHID, isClosed, epochCreated, epochModified,
authorPHID, ownerPHID) VALUES (%s, %d, %d, %d, %ns, %ns)',
$engine->getDocumentTableName(),
$object->getPHID(),
$is_closed,
$document->getDocumentCreated(),
$document->getDocumentModified(),
$author_phid,
$owner_phid);
$document_id = $conn->getInsertID();
foreach ($ferret_fields as $ferret_field) {
queryfx(
$conn,
'INSERT INTO %T (documentID, fieldKey, rawCorpus, termCorpus,
normalCorpus) VALUES (%d, %s, %s, %s, %s)',
$engine->getFieldTableName(),
$document_id,
$ferret_field['fieldKey'],
$ferret_field['rawCorpus'],
$ferret_field['termCorpus'],
$ferret_field['normalCorpus']);
}
if ($ngrams) {
$common = queryfx_all(
$conn,
'SELECT ngram FROM %T WHERE ngram IN (%Ls)',
$engine->getCommonNgramsTableName(),
$ngrams);
$common = ipull($common, 'ngram', 'ngram');
foreach ($ngrams as $key => $ngram) {
if (isset($common[$ngram])) {
unset($ngrams[$key]);
continue;
}
// NOTE: MySQL discards trailing whitespace in CHAR(X) columns.
$trim_ngram = rtrim($ngram, ' ');
if (isset($common[$ngram])) {
unset($ngrams[$key]);
continue;
}
}
}
if ($ngrams) {
$sql = array();
foreach ($ngrams as $ngram) {
$sql[] = qsprintf(
$conn,
'(%d, %s)',
$document_id,
$ngram);
}
foreach (PhabricatorLiskDAO::chunkSQL($sql) as $chunk) {
queryfx(
$conn,
'INSERT INTO %T (documentID, ngram) VALUES %Q',
$engine->getNgramsTableName(),
$chunk);
}
}
} catch (Exception $ex) {
$object->killTransaction();
throw $ex;
}
$object->saveTransaction();
}
private function deleteOldDocument(
PhabricatorFerretEngine $engine,
$object,
PhabricatorSearchAbstractDocument $document) {
$conn = $object->establishConnection('w');
$old_document = queryfx_one(
$conn,
'SELECT * FROM %T WHERE objectPHID = %s',
$engine->getDocumentTableName(),
$object->getPHID());
if (!$old_document) {
return;
}
$old_id = $old_document['id'];
queryfx(
$conn,
'DELETE FROM %T WHERE id = %d',
$engine->getDocumentTableName(),
$old_id);
queryfx(
$conn,
'DELETE FROM %T WHERE documentID = %d',
$engine->getFieldTableName(),
$old_id);
queryfx(
$conn,
'DELETE FROM %T WHERE documentID = %d',
$engine->getNgramsTableName(),
$old_id);
}
}

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