Fixes #2756: Added support for injecting custom `isEmpty` check for all validators

framework/CHANGELOG.md

@@ -145,6 +145,7 @@ Yii Framework 2 Change Log
 - Enh #2670: Changed `console\Controller::globalOptions()` to `options($actionId)` to (make it possible to) differentiate options per action (hqx)
 - Enh #2729: Added `FilterValidator::skipOnArray` so that filters like `trim` will not fail for array inputs (qiangxue)
 - Enh #2735: Added support for `DateTimeInterface` in `Formatter` (ivokund)
+- Enh #2756: Added support for injecting custom `isEmpty` check for all validators (qiangxue)
 - Enh: Added support for using arrays as option values for console commands (qiangxue)
 - Enh: Added `favicon.ico` and `robots.txt` to default application templates (samdark)
 - Enh: Added `Widget::autoIdPrefix` to support prefixing automatically generated widget IDs (qiangxue)

framework/assets/yii.validation.js

@@ -11,20 +11,20 @@
  */
 
 yii.validation = (function ($) {
-	var isEmpty = function (value, trim) {
-		return value === null || value === undefined || value == []
-			|| value === '' || trim && $.trim(value) === '';
-	};
-
-	var addMessage = function (messages, message, value) {
-		messages.push(message.replace(/\{value\}/g, value));
-	};
+	var pub = {
+		isEmpty: function (value) {
+			return value === null || value === undefined || value == [] || value === '';
+		},
 
-	return {
+		addMessage: function (messages, message, value) {
+			messages.push(message.replace(/\{value\}/g, value));
+		},
+		
 		required: function (value, messages, options) {
 			var valid = false;
 			if (options.requiredValue === undefined) {
-				if (options.strict && value !== undefined || !options.strict && !isEmpty(value, true)) {
+				var isString = typeof value == 'string' || value instanceof String;
+				if (options.strict && value !== undefined || !options.strict && !pub.isEmpty(isString ? $.trim(value) : value)) {
 					valid = true;
 				}
 			} else if (!options.strict && value == options.requiredValue || options.strict && value === options.requiredValue) {
@@ -32,85 +32,85 @@ yii.validation = (function ($) {
 			}
 
 			if (!valid) {
-				addMessage(messages, options.message, value);
+				pub.addMessage(messages, options.message, value);
 			}
 		},
 
 		boolean: function (value, messages, options) {
-			if (options.skipOnEmpty && isEmpty(value)) {
+			if (options.skipOnEmpty && pub.isEmpty(value)) {
 				return;
 			}
 			var valid = !options.strict && (value == options.trueValue || value == options.falseValue)
 				|| options.strict && (value === options.trueValue || value === options.falseValue);
 
 			if (!valid) {
-				addMessage(messages, options.message, value);
+				pub.addMessage(messages, options.message, value);
 			}
 		},
 
 		string: function (value, messages, options) {
-			if (options.skipOnEmpty && isEmpty(value)) {
+			if (options.skipOnEmpty && pub.isEmpty(value)) {
 				return;
 			}
 
 			if (typeof value !== 'string') {
-				addMessage(messages, options.message, value);
+				pub.addMessage(messages, options.message, value);
 				return;
 			}
 
 			if (options.min !== undefined && value.length < options.min) {
-				addMessage(messages, options.tooShort, value);
+				pub.addMessage(messages, options.tooShort, value);
 			}
 			if (options.max !== undefined && value.length > options.max) {
-				addMessage(messages, options.tooLong, value);
+				pub.addMessage(messages, options.tooLong, value);
 			}
 			if (options.is !== undefined && value.length != options.is) {
-				addMessage(messages, options.is, value);
+				pub.addMessage(messages, options.is, value);
 			}
 		},
 
 		number: function (value, messages, options) {
-			if (options.skipOnEmpty && isEmpty(value)) {
+			if (options.skipOnEmpty && pub.isEmpty(value)) {
 				return;
 			}
 
 			if (typeof value === 'string' && !value.match(options.pattern)) {
-				addMessage(messages, options.message, value);
+				pub.addMessage(messages, options.message, value);
 				return;
 			}
 
 			if (options.min !== undefined && value < options.min) {
-				addMessage(messages, options.tooSmall, value);
+				pub.addMessage(messages, options.tooSmall, value);
 			}
 			if (options.max !== undefined && value > options.max) {
-				addMessage(messages, options.tooBig, value);
+				pub.addMessage(messages, options.tooBig, value);
 			}
 		},
 
 		range: function (value, messages, options) {
-			if (options.skipOnEmpty && isEmpty(value)) {
+			if (options.skipOnEmpty && pub.isEmpty(value)) {
 				return;
 			}
 			var valid = !options.not && $.inArray(value, options.range) > -1
 				|| options.not && $.inArray(value, options.range) == -1;
 
 			if (!valid) {
-				addMessage(messages, options.message, value);
+				pub.addMessage(messages, options.message, value);
 			}
 		},
 
 		regularExpression: function (value, messages, options) {
-			if (options.skipOnEmpty && isEmpty(value)) {
+			if (options.skipOnEmpty && pub.isEmpty(value)) {
 				return;
 			}
 
 			if (!options.not && !value.match(options.pattern) || options.not && value.match(options.pattern)) {
-				addMessage(messages, options.message, value);
+				pub.addMessage(messages, options.message, value);
 			}
 		},
 
 		email: function (value, messages, options) {
-			if (options.skipOnEmpty && isEmpty(value)) {
+			if (options.skipOnEmpty && pub.isEmpty(value)) {
 				return;
 			}
 
@@ -127,12 +127,12 @@ yii.validation = (function ($) {
 			}
 
 			if (!valid || !(value.match(options.pattern) || (options.allowName && value.match(options.fullPattern)))) {
-				addMessage(messages, options.message, value);
+				pub.addMessage(messages, options.message, value);
 			}
 		},
 
 		url: function (value, messages, options) {
-			if (options.skipOnEmpty && isEmpty(value)) {
+			if (options.skipOnEmpty && pub.isEmpty(value)) {
 				return;
 			}
 
@@ -153,12 +153,12 @@ yii.validation = (function ($) {
 			}
 
 			if (!valid || !value.match(options.pattern)) {
-				addMessage(messages, options.message, value);
+				pub.addMessage(messages, options.message, value);
 			}
 		},
 
 		captcha: function (value, messages, options) {
-			if (options.skipOnEmpty && isEmpty(value)) {
+			if (options.skipOnEmpty && pub.isEmpty(value)) {
 				return;
 			}
 
@@ -174,12 +174,12 @@ yii.validation = (function ($) {
 				h += v.charCodeAt(i);
 			}
 			if (h != hash) {
-				addMessage(messages, options.message, value);
+				pub.addMessage(messages, options.message, value);
 			}
 		},
 
 		compare: function (value, messages, options) {
-			if (options.skipOnEmpty && isEmpty(value)) {
+			if (options.skipOnEmpty && pub.isEmpty(value)) {
 				return;
 			}
 
@@ -220,8 +220,9 @@ yii.validation = (function ($) {
 			}
 
 			if (!valid) {
-				addMessage(messages, options.message, value);
+				pub.addMessage(messages, options.message, value);
 			}
 		}
 	};
+	return pub;
 })(jQuery);

framework/validators/RequiredValidator.php

@@ -67,7 +67,7 @@ class RequiredValidator extends Validator
 	protected function validateValue($value)
 	{
 		if ($this->requiredValue === null) {
-			if ($this->strict && $value !== null || !$this->strict && !$this->isEmpty($value, true)) {
+			if ($this->strict && $value !== null || !$this->strict && !$this->isEmpty(is_string($value) ? trim($value) : $value)) {
 				return null;
 			}
 		} elseif (!$this->strict && $value == $this->requiredValue || $this->strict && $value === $this->requiredValue) {

framework/validators/Validator.php

@@ -120,6 +120,13 @@ class Validator extends Component
 	 * is true, no client-side validation will be done by this validator.
 	 */
 	public $enableClientValidation = true;
+	/**
+	 * @var callable a PHP callable that replaces the default implementation of [[isEmpty()]].
+	 * If not set, [[isEmpty()]] will be used to check if a value is empty. The signature
+	 * of the callable should be `function ($value)` which returns a boolean indicating
+	 * whether the value is empty.
+	 */
+	public $isEmpty;
 
 
 	/**
@@ -301,12 +308,14 @@ class Validator extends Component
 	 * A value is considered empty if it is null, an empty array, or the trimmed result is an empty string.
 	 * Note that this method is different from PHP empty(). It will return false when the value is 0.
 	 * @param mixed $value the value to be checked
-	 * @param boolean $trim whether to perform trimming before checking if the string is empty. Defaults to false.
 	 * @return boolean whether the value is empty
 	 */
-	public function isEmpty($value, $trim = false)
+	public function isEmpty($value)
 	{
-		return $value === null || $value === [] || $value === ''
-			|| $trim && is_scalar($value) && trim($value) === '';
+		if ($this->isEmpty !== null) {
+			return call_user_func($this->isEmpty, $value);
+		} else {
+			return $value === null || $value === [] || $value === '';
+		}
 	}
 }