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Modules/Support/Search/MySqlSearchEngine.php

@@ -0,0 +1,173 @@
+<?php
+
+namespace Modules\Support\Search;
+
+use Laravel\Scout\Builder;
+use Laravel\Scout\Engines\Engine;
+use Illuminate\Support\Facades\DB;
+
+class MySqlSearchEngine extends Engine
+{
+    public function update($models)
+    {
+        //
+    }
+
+    public function delete($models)
+    {
+        //
+    }
+
+    /**
+     * Pluck and return the primary keys of the given results.
+     *
+     * @param mixed $results
+     * @return \Illuminate\Support\Collection
+     */
+    public function mapIds($results)
+    {
+        return $results['results'];
+    }
+
+    /**
+     * Perform the given search on the engine.
+     *
+     * @param \Laravel\Scout\Builder $builder
+     * @return mixed
+     */
+    public function search(Builder $builder)
+    {
+        $result = [];
+
+        $query = DB::table($builder->model->searchTable());
+
+        $columns = implode(',', $builder->model->searchColumns());
+
+        $query->whereRaw("MATCH ({$columns}) AGAINST (? IN BOOLEAN MODE)", $this->getSearchKeyword($builder));
+
+        if ($builder->callback) {
+            $query = call_user_func($builder->callback, $query, $this);
+        }
+
+        $result['count'] = $query->count();
+
+        if (property_exists($builder, 'orders') && ! empty($builder->orders)) {
+            foreach ($builder->orders as $order) {
+                $query->orderBy($order['column'], $order['direction']);
+            }
+        }
+
+        if ($builder->limit) {
+            $query = $query->take($builder->limit);
+        }
+
+        if (property_exists($builder, 'offset') && $builder->offset) {
+            $query = $query->skip($builder->offset);
+        }
+
+        $result['results'] = $query->pluck($builder->model->searchKey());
+
+        return $result;
+    }
+
+    /**
+     * Get the search query.
+     *
+     * @param \Laravel\Scout\Builder $builder
+     * @return string
+     */
+    private function getSearchKeyword($builder)
+    {
+        if (is_null($builder->query)) {
+            return '';
+        }
+
+        return '+' . preg_replace('/[-+~*()><@"]/', ' ', $builder->query) . '*';
+    }
+
+    /**
+     * Perform the given search on the engine.
+     *
+     * @param \Modules\Support\Search\Builder $builder
+     * @param int $perPage
+     * @param int $page
+     * @return mixed
+     */
+    public function paginate(Builder $builder, $perPage, $page)
+    {
+        $builder->limit = $perPage;
+        $builder->offset = ($perPage * $page) - $perPage;
+
+        return $this->search($builder);
+    }
+
+    /**
+     * Map the given results to instances of the given model.
+     *
+     * @param Laravel\Scout\Builder $builder
+     * @param \Illuminate\Database\Eloquent\Model $model
+     * @return \Illuminate\Support\Collection
+     */
+    public function map(Builder $builder, $results, $model)
+    {
+        return $results['results'];
+    }
+
+    /**
+     * Map the given results to instances of the given model via a lazy collection.
+     *
+     * @param \Laravel\Scout\Builder $builder
+     * @param mixed $results
+     * @param \Illuminate\Database\Eloquent\Model $model
+     * @return \Illuminate\Support\LazyCollection
+     */
+    public function lazyMap(Builder $builder, $results, $model)
+    {
+        //
+    }
+
+    /**
+     * Get the total count from a raw result returned by the engine.
+     *
+     * @param mixed $results
+     * @return int
+     */
+    public function getTotalCount($results)
+    {
+        return $results['count'];
+    }
+
+    /**
+     * Flush all of the model's records from the engine.
+     *
+     * @param  \Illuminate\Database\Eloquent\Model  $model
+     * @return void
+     */
+    public function flush($model)
+    {
+        //
+    }
+
+    /**
+     * Create a search index.
+     *
+     * @param string $name
+     * @param array $options
+     * @return mixed
+     */
+    public function createIndex($name, array $options = [])
+    {
+        //
+    }
+
+    /**
+     * Delete a search index.
+     *
+     * @param string $name
+     * @return mixed
+     */
+    public function deleteIndex($name)
+    {
+        //
+    }
+}