new MinMaxValidator

CHANGELOG.md

@@ -1,5 +1,11 @@
 Changelog
 =========
+
+## Unreleased
+
+### Added
+- MinMaxValidator which extends Craft's MinMaxValidator except it also works with query value attributes
+
 ## 1.0.0 - 2018-04-24
 - Production release
 

src/validators/MinMaxValidator.php

@@ -0,0 +1,88 @@
+<?php
+
+/**
+ * @copyright  Copyright (c) Flipbox Digital Limited
+ * @license    https://github.com/flipboxfactory/craft-ember/blob/master/LICENSE
+ * @link       https://github.com/flipboxfactory/craft-ember
+ */
+
+namespace flipbox\domains\validators;
+
+use craft\validators\ArrayValidator;
+use yii\db\QueryInterface;
+
+/**
+ * @author Flipbox Factory <hello@flipboxfactory.com>
+ * @since 1.0.0
+ */
+class MinMaxValidator extends ArrayValidator
+{
+    /**
+     * @inheritdoc
+     */
+    public function validateAttribute($model, $attribute)
+    {
+        $value = $model->$attribute;
+
+        if($value instanceof QueryInterface) {
+            return $this->validateQueryAttribute($model, $attribute, $value);
+        }
+
+        return parent::validateAttribute($model, $attribute);
+    }
+
+    /**
+     * @inheritdoc
+     */
+    protected function validateValue($value)
+    {
+        if($value instanceof QueryInterface) {
+            return $this->validateQueryValue($value);
+        }
+
+        return parent::validateValue($value);
+    }
+
+    /**
+     * @param QueryInterface $query
+     * @return array|null the error message and the parameters to be inserted into the error message.
+     * Null should be returned if the data is valid.
+     */
+    protected function validateQueryValue(QueryInterface $query)
+    {
+        /** @var QueryInterface $value */
+        $count = $query->count();
+
+        if ($this->min !== null && $count < $this->min) {
+            return [$this->tooFew, ['min' => $this->min]];
+        }
+        if ($this->max !== null && $count > $this->max) {
+            return [$this->tooMany, ['max' => $this->max]];
+        }
+        if ($this->count !== null && $count !== $this->count) {
+            return [$this->notEqual, ['count' => $this->count]];
+        }
+
+        return null;
+    }
+
+    /**
+     * @param $model
+     * @param $attribute
+     * @param QueryInterface $query
+     */
+    protected function validateQueryAttribute($model, $attribute, QueryInterface $query)
+    {
+        $count = $query->count();
+
+        if ($this->min !== null && $count < $this->min) {
+            $this->addError($model, $attribute, $this->tooFew, ['min' => $this->min]);
+        }
+        if ($this->max !== null && $count > $this->max) {
+            $this->addError($model, $attribute, $this->tooMany, ['max' => $this->max]);
+        }
+        if ($this->count !== null && $count !== $this->count) {
+            $this->addError($model, $attribute, $this->notEqual, ['count' => $this->count]);
+        }
+    }
+}