searchTerm = $searchTerm; $this->book = $book; $this->chapter = $chapter; $this->page = $page; $this->db = $db; } public function searchEntities($searchString, $entityType = 'all') { // TODO - Add Tag Searches // TODO - Add advanced custom column searches // TODO - Add exact match searches ("") $termArray = explode(' ', $searchString); $subQuery = $this->db->table('search_terms')->select('entity_id', 'entity_type', \DB::raw('SUM(score) as score')); $subQuery->where(function($query) use ($termArray) { foreach ($termArray as $inputTerm) { $query->orWhere('term', 'like', $inputTerm .'%'); } }); $subQuery = $subQuery->groupBy('entity_type', 'entity_id'); $pageSelect = $this->db->table('pages as e')->join(\DB::raw('(' . $subQuery->toSql() . ') as s'), function(JoinClause $join) { $join->on('e.id', '=', 's.entity_id'); })->selectRaw('e.*, s.score')->orderBy('score', 'desc'); $pageSelect->mergeBindings($subQuery); dd($pageSelect->toSql()); // TODO - Continue from here } /** * Index the given entity. * @param Entity $entity */ public function indexEntity(Entity $entity) { $this->deleteEntityTerms($entity); $nameTerms = $this->generateTermArrayFromText($entity->name, 5); $bodyTerms = $this->generateTermArrayFromText($entity->getText(), 1); $terms = array_merge($nameTerms, $bodyTerms); $entity->searchTerms()->createMany($terms); } /** * Index multiple Entities at once * @param Entity[] $entities */ protected function indexEntities($entities) { $terms = []; foreach ($entities as $entity) { $nameTerms = $this->generateTermArrayFromText($entity->name, 5); $bodyTerms = $this->generateTermArrayFromText($entity->getText(), 1); foreach (array_merge($nameTerms, $bodyTerms) as $term) { $term['entity_id'] = $entity->id; $term['entity_type'] = $entity->getMorphClass(); $terms[] = $term; } } $this->searchTerm->insert($terms); } /** * Delete and re-index the terms for all entities in the system. */ public function indexAllEntities() { $this->searchTerm->truncate(); // Chunk through all books $this->book->chunk(500, function ($books) { $this->indexEntities($books); }); // Chunk through all chapters $this->chapter->chunk(500, function ($chapters) { $this->indexEntities($chapters); }); // Chunk through all pages $this->page->chunk(500, function ($pages) { $this->indexEntities($pages); }); } /** * Delete related Entity search terms. * @param Entity $entity */ public function deleteEntityTerms(Entity $entity) { $entity->searchTerms()->delete(); } /** * Create a scored term array from the given text. * @param $text * @param float|int $scoreAdjustment * @return array */ protected function generateTermArrayFromText($text, $scoreAdjustment = 1) { $tokenMap = []; // {TextToken => OccurrenceCount} $splitText = explode(' ', $text); foreach ($splitText as $token) { if ($token === '') continue; if (!isset($tokenMap[$token])) $tokenMap[$token] = 0; $tokenMap[$token]++; } $terms = []; foreach ($tokenMap as $token => $count) { $terms[] = [ 'term' => $token, 'score' => $count * $scoreAdjustment ]; } return $terms; } }