Merge branch 'develop' of github.com:QuincePHP/Pelastic into develop

Conflicts:
	src/SqlMonkey/QueryFactory.php

Author: Reza Shadman

src/SqlMonkey/QueryFactory.php

@@ -0,0 +1,86 @@
+<?php namespace Quince\Pelastic\SqlMonkey;
+
+use Quince\Pelastic\Exceptions\PelasticInvalidArgumentException;
+
+class QueryFactory extends \Quince\Pelastic\QueryFactory {
+
+    /**
+     * Mapper for sql to elasticsearch queries
+     *
+     * @var array
+     */
+    private $mapper = [
+        '=' => 'term',
+        'like' => 'wildcard',
+        'in' => 'terms',
+        'not in' => 'terms',
+        '<>' => 'term',
+        '!=' => 'term',
+        'is null' => 'exists',
+        'is not null' => 'exists',
+        'between' => 'range',
+    ];
+
+    /**
+     * Operators with negative impact
+     *
+     * @var array
+     */
+    private $negativeImpact = [
+        '<>',
+        '!=',
+        'not in',
+        'is not null'
+    ];
+
+    /**
+     * Map sql queries to elasticsearch queries
+     *
+     * @param $sqlQueryCondition
+     * @param array $args
+     * @return \Quince\Pelastic\Contracts\Queries\QueryInterface
+     */
+    public function mapSqlToElastic($sqlQueryCondition, array $args = [])
+    {
+        $mapper = $this->getMapper();
+
+        if (!isset($mapper[$sqlQueryCondition])) {
+
+            throw new PelasticInvalidArgumentException("No sql-to-elasticsearch handler found for [{$sqlQueryCondition}].");
+
+        }
+
+        return $this->create($mapper[$sqlQueryCondition], $args);
+    }
+
+    /**
+     * Given operator has negative impact
+     *
+     * @param $operator
+     * @return bool
+     */
+    public function operatorIsNegative($operator)
+    {
+        return isset($this->getNegativeImpact()[$operator]);
+    }
+
+    /**
+     * Get sql mapper
+     *
+     * @return array
+     */
+    private function getMapper()
+    {
+        return $this->mapper;
+    }
+
+    /**
+     * Operators that have negative impact
+     *
+     * @return array
+     */
+    private function getNegativeImpact()
+    {
+        return $this->negativeImpact;
+    }
+}