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PhabricatorFerretEngine.php
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Created
Fri, Nov 29, 00:23

PhabricatorFerretEngine.php
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<?php
abstract class PhabricatorFerretEngine extends Phobject {
abstract public function getApplicationName();
abstract public function getScopeName();
abstract public function newSearchEngine();
public function getDefaultFunctionKey() {
return 'all';
}
public function getObjectTypeRelevance() {
return 1000;
}
public function getFieldForFunction($function) {
$function = phutil_utf8_strtolower($function);
$map = $this->getFunctionMap();
if (!isset($map[$function])) {
throw new PhutilSearchQueryCompilerSyntaxException(
pht(
'Unknown search function "%s". Supported functions are: %s.',
$function,
implode(', ', array_keys($map))));
}
return $map[$function]['field'];
}
public function getAllFunctionFields() {
$map = $this->getFunctionMap();
$fields = array();
foreach ($map as $key => $spec) {
$fields[] = $spec['field'];
}
return $fields;
}
protected function getFunctionMap() {
return array(
'all' => array(
'field' => PhabricatorSearchDocumentFieldType::FIELD_ALL,
'aliases' => array(
'any',
),
),
'title' => array(
'field' => PhabricatorSearchDocumentFieldType::FIELD_TITLE,
'aliases' => array(),
),
'body' => array(
'field' => PhabricatorSearchDocumentFieldType::FIELD_BODY,
'aliases' => array(),
),
'core' => array(
'field' => PhabricatorSearchDocumentFieldType::FIELD_CORE,
'aliases' => array(),
),
'comment' => array(
'field' => PhabricatorSearchDocumentFieldType::FIELD_COMMENT,
'aliases' => array(
'comments',
),
),
);
}
public function newStemmer() {
return new PhutilSearchStemmer();
}
public function tokenizeString($value) {
$value = trim($value, ' ');
$value = preg_split('/\s+/u', $value);
return $value;
}
public function getTermNgramsFromString($string) {
return $this->getNgramsFromString($string, true);
}
public function getSubstringNgramsFromString($string) {
return $this->getNgramsFromString($string, false);
}
private function getNgramsFromString($value, $as_term) {
$tokens = $this->tokenizeString($value);
$ngrams = array();
foreach ($tokens as $token) {
$token = phutil_utf8_strtolower($token);
if ($as_term) {
$token = ' '.$token.' ';
}
$token_v = phutil_utf8v($token);
$len = (count($token_v) - 2);
for ($ii = 0; $ii < $len; $ii++) {
$ngram = array_slice($token_v, $ii, 3);
$ngram = implode('', $ngram);
$ngrams[$ngram] = $ngram;
}
}
ksort($ngrams);
return array_keys($ngrams);
}
public function newTermsCorpus($raw_corpus) {
$term_corpus = strtr(
$raw_corpus,
array(
'!' => ' ',
'"' => ' ',
'#' => ' ',
'$' => ' ',
'%' => ' ',
'&' => ' ',
'(' => ' ',
')' => ' ',
'*' => ' ',
'+' => ' ',
',' => ' ',
'-' => ' ',
'/' => ' ',
':' => ' ',
';' => ' ',
'<' => ' ',
'=' => ' ',
'>' => ' ',
'?' => ' ',
'@' => ' ',
'[' => ' ',
'\\' => ' ',
']' => ' ',
'^' => ' ',
'`' => ' ',
'{' => ' ',
'|' => ' ',
'}' => ' ',
'~' => ' ',
'.' => ' ',
'_' => ' ',
"\n" => ' ',
"\r" => ' ',
"\t" => ' ',
));
// NOTE: Single quotes divide terms only if they're at a word boundary.
// In contractions, like "whom'st've", the entire word is a single term.
$term_corpus = preg_replace('/(^| )[\']+/', ' ', $term_corpus);
$term_corpus = preg_replace('/[\']+( |$)/', ' ', $term_corpus);
$term_corpus = preg_replace('/\s+/u', ' ', $term_corpus);
$term_corpus = trim($term_corpus, ' ');
if (strlen($term_corpus)) {
$term_corpus = ' '.$term_corpus.' ';
}
return $term_corpus;
}
/* -( Schema )------------------------------------------------------------- */
public function getDocumentTableName() {
$application = $this->getApplicationName();
$scope = $this->getScopeName();
return "{$application}_{$scope}_fdocument";
}
public function getDocumentSchemaColumns() {
return array(
'id' => 'auto',
'objectPHID' => 'phid',
'isClosed' => 'bool',
'authorPHID' => 'phid?',
'ownerPHID' => 'phid?',
'epochCreated' => 'epoch',
'epochModified' => 'epoch',
);
}
public function getDocumentSchemaKeys() {
return array(
'PRIMARY' => array(
'columns' => array('id'),
'unique' => true,
),
'key_object' => array(
'columns' => array('objectPHID'),
'unique' => true,
),
'key_author' => array(
'columns' => array('authorPHID'),
),
'key_owner' => array(
'columns' => array('ownerPHID'),
),
'key_created' => array(
'columns' => array('epochCreated'),
),
'key_modified' => array(
'columns' => array('epochModified'),
),
);
}
public function getFieldTableName() {
$application = $this->getApplicationName();
$scope = $this->getScopeName();
return "{$application}_{$scope}_ffield";
}
public function getFieldSchemaColumns() {
return array(
'id' => 'auto',
'documentID' => 'uint32',
'fieldKey' => 'text4',
'rawCorpus' => 'sort',
'termCorpus' => 'sort',
'normalCorpus' => 'sort',
);
}
public function getFieldSchemaKeys() {
return array(
'PRIMARY' => array(
'columns' => array('id'),
'unique' => true,
),
'key_documentfield' => array(
'columns' => array('documentID', 'fieldKey'),
'unique' => true,
),
);
}
public function getNgramsTableName() {
$application = $this->getApplicationName();
$scope = $this->getScopeName();
return "{$application}_{$scope}_fngrams";
}
public function getNgramsSchemaColumns() {
return array(
'id' => 'auto',
'documentID' => 'uint32',
'ngram' => 'char3',
);
}
public function getNgramsSchemaKeys() {
return array(
'PRIMARY' => array(
'columns' => array('id'),
'unique' => true,
),
'key_ngram' => array(
'columns' => array('ngram', 'documentID'),
),
'key_object' => array(
'columns' => array('documentID'),
),
);
}
}

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