/**
* Tests that search_simplify() does the right thing with punctuation.
*/
function testSearchSimplifyPunctuation()
{
$cases = array(array('20.03/94-28,876', '20039428876', 'Punctuation removed from numbers'), array('great...drupal--module', 'great drupal module', 'Multiple dot and dashes are word boundaries'), array('very_great-drupal.module', 'verygreatdrupalmodule', 'Single dot, dash, underscore are removed'), array('regular,punctuation;word', 'regular punctuation word', 'Punctuation is a word boundary'));
foreach ($cases as $case) {
$out = trim(search_simplify($case[0]));
$this->assertEqual($out, $case[1], $case[2]);
}
}
/**
* Verifies that strings of non-CJK characters are not tokenized.
*
* This is just a sanity check - it verifies that strings of letters are
* not tokenized.
*/
function testNoTokenizer()
{
// Set the minimum word size to 1 (to split all CJK characters) and make
// sure CJK tokenizing is turned on.
$this->config('search.settings')->set('index.minimum_word_size', 1)->set('index.overlap_cjk', TRUE)->save();
$this->refreshVariables();
$letters = 'abcdefghijklmnopqrstuvwxyz';
$out = trim(search_simplify($letters));
$this->assertEqual($letters, $out, 'Letters are not CJK tokenized');
}
/**
* Parses the search query into SQL conditions.
*
* Sets up the following variables:
* - $this->keys
* - $this->words
* - $this->conditions
* - $this->simple
* - $this->matches
*/
protected function parseSearchExpression()
{
// Matches words optionally prefixed by a - sign. A word in this case is
// something between two spaces, optionally quoted.
preg_match_all('/ (-?)("[^"]+"|[^" ]+)/i', ' ' . $this->searchExpression, $keywords, PREG_SET_ORDER);
if (count($keywords) == 0) {
return;
}
// Classify tokens.
$or = FALSE;
$limit_combinations = \Drupal::config('search.settings')->get('and_or_limit');
// The first search expression does not count as AND.
$and_count = -1;
$or_count = 0;
foreach ($keywords as $match) {
if ($or_count && $and_count + $or_count >= $limit_combinations) {
// Ignore all further search expressions to prevent Denial-of-Service
// attacks using a high number of AND/OR combinations.
$this->status |= SearchQuery::EXPRESSIONS_IGNORED;
break;
}
$phrase = FALSE;
// Strip off phrase quotes.
if ($match[2][0] == '"') {
$match[2] = substr($match[2], 1, -1);
$phrase = TRUE;
$this->simple = FALSE;
}
// Simplify keyword according to indexing rules and external
// preprocessors. Use same process as during search indexing, so it
// will match search index.
$words = search_simplify($match[2]);
// Re-explode in case simplification added more words, except when
// matching a phrase.
$words = $phrase ? array($words) : preg_split('/ /', $words, -1, PREG_SPLIT_NO_EMPTY);
// Negative matches.
if ($match[1] == '-') {
$this->keys['negative'] = array_merge($this->keys['negative'], $words);
} elseif ($match[2] == 'OR' && count($this->keys['positive'])) {
$last = array_pop($this->keys['positive']);
// Starting a new OR?
if (!is_array($last)) {
$last = array($last);
}
$this->keys['positive'][] = $last;
$or = TRUE;
$or_count++;
continue;
} elseif ($match[2] == 'AND' || $match[2] == 'and') {
continue;
} else {
if ($match[2] == 'or') {
// Lower-case "or" instead of "OR" is a warning condition.
$this->status |= SearchQuery::LOWER_CASE_OR;
}
if ($or) {
// Add to last element (which is an array).
$this->keys['positive'][count($this->keys['positive']) - 1] = array_merge($this->keys['positive'][count($this->keys['positive']) - 1], $words);
} else {
$this->keys['positive'] = array_merge($this->keys['positive'], $words);
$and_count++;
}
}
$or = FALSE;
}
// Convert keywords into SQL statements.
$simple_and = FALSE;
$simple_or = FALSE;
// Positive matches.
foreach ($this->keys['positive'] as $key) {
// Group of ORed terms.
if (is_array($key) && count($key)) {
$simple_or = TRUE;
$any = FALSE;
$queryor = db_or();
foreach ($key as $or) {
list($num_new_scores) = $this->parseWord($or);
$any |= $num_new_scores;
$queryor->condition('d.data', "% {$or} %", 'LIKE');
}
if (count($queryor)) {
$this->conditions->condition($queryor);
// A group of OR keywords only needs to match once.
$this->matches += $any > 0;
}
} else {
$simple_and = TRUE;
list($num_new_scores, $num_valid_words) = $this->parseWord($key);
$this->conditions->condition('d.data', "% {$key} %", 'LIKE');
if (!$num_valid_words) {
$this->simple = FALSE;
}
// Each AND keyword needs to match at least once.
$this->matches += $num_new_scores;
}
}
if ($simple_and && $simple_or) {
$this->simple = FALSE;
}
// Negative matches.
foreach ($this->keys['negative'] as $key) {
$this->conditions->condition('d.data', "% {$key} %", 'NOT LIKE');
$this->simple = FALSE;
}
}
