Add LIKE and ILIKE approvals

README.md

@@ -29,7 +29,8 @@ $field = new Field($fieldKey, $fieldValue);
 
 A field has the ability to accept, reject or see the value as part of a range with a third optional parameter. These 
 parameters are constants of the field `APPROVAL_ACCEPT`, `APPROVAL_REJECT`, `APPROVAL_START_OF_RANGE`, 
-`APPROVAL_END_OF_RANGE`, `APPROVAL_IN` and `APPROVAL_NOT_IN`.
+`APPROVAL_END_OF_RANGE`, `APPROVAL_IN`, `APPROVAL_NOT_IN`, `APPROVAL_LIKE` and `APPROVAL_ILIKE` (which can only be used 
+if your Database supports it, like Postgres).
 
 The field is a member of a group. The group has a conjunction, which are constants of the group called 
 `CONJUNCTION_AND` and `CONJUCTION_OR`.

src/Adapters/QueryBuilder.php

@@ -24,6 +24,10 @@ private function getFilterFieldOperator($approval)
                 return '>=';
             case Field::APPROVAL_END_OF_RANGE :
                 return '<=';
+            case Field::APPROVAL_LIKE :
+                return 'LIKE';
+            case Field::APPROVAL_ILIKE :
+                return 'ILIKE';
             default :
                 return '=';
         }
@@ -53,6 +57,15 @@ public function getFilterFieldQuery(Builder $query, Field $field, $method = 'and
                     $method
                 );
                 break;
+            case Field::APPROVAL_LIKE :
+            case Field::APPROVAL_ILIKE :
+                $query->where(
+                    $field->getOption(),
+                    $this->getFilterFieldOperator($field->getApproval()),
+                    sprintf('%%%s%%', $field->getValue()),
+                    $method
+                );
+                break;
             default :
                 $query->where(
                     $field->getOption(),

src/Field.php

@@ -13,6 +13,8 @@ class Field implements Arrayable
     const APPROVAL_END_OF_RANGE = 3;
     const APPROVAL_IN = 4;
     const APPROVAL_NOT_IN = 5;
+    const APPROVAL_LIKE = 6;
+    const APPROVAL_ILIKE = 7;
 
     /**
      * Holds the name of the option.
@@ -111,6 +113,8 @@ private function setApproval($approval)
             self::APPROVAL_END_OF_RANGE,
             self::APPROVAL_IN,
             self::APPROVAL_NOT_IN,
+            self::APPROVAL_LIKE,
+            self::APPROVAL_ILIKE,
         ];
         if (! in_array($approval, $availableApprovals)) {
             throw new InvalidApprovalException(sprintf('Approval "%s" is not supported', $approval));