feature #28644 [Validator] Pre-check constraint validator dependencies (ro0NL)

This PR was merged into the 4.2-dev branch.

Discussion
----------

[Validator] Pre-check constraint validator dependencies

| Q             | A
| ------------- | ---
| Branch?       | master
| Bug fix?      | no
| New feature?  | yes
| BC breaks?    | no     <!-- see https://symfony.com/bc -->
| Deprecations? | yes
| Tests pass?   | yes    <!-- please add some, will be required by reviewers -->
| Fixed tickets | #25865
| License       | MIT
| Doc PR        | symfony/symfony-docs#... <!-- required for new features -->

<!--
Write a short README entry for your feature/bugfix here (replace this comment block.)
This will help people understand your PR and can be used as a start of the Doc PR.
Additionally:
 - Bug fixes must be submitted against the lowest branch where they apply
   (lowest branches are regularly merged to upper ones so they get the fixes too).
 - Features and deprecations must be submitted against the master branch.
-->

Commits
-------

0544985934 [Validator] Pre-check constraint validator dependencies

Author: nicolas-grekas

CHANGELOG.md

@@ -10,7 +10,9 @@ CHANGELOG
  * made `ValidatorBuilder` final
  * marked `format` the default option in `DateTime` constraint
  * deprecated validating instances of `\DateTimeInterface` in `DateTimeValidator`, `DateValidator` and `TimeValidator`.
- * deprecated using the `Bic` constraint without `symfony/intl`
+ * deprecated using the `Bic`, `Country`, `Currency`, `Language` and `Locale` constraints without `symfony/intl`
+ * deprecated using the `Email` constraint without `egulias/email-validator`
+ * deprecated using the `Expression` constraint without `symfony/expression-language`
 
 4.1.0
 -----

Constraints/BicValidator.php

@@ -14,6 +14,7 @@
 use Symfony\Component\Intl\Intl;
 use Symfony\Component\Validator\Constraint;
 use Symfony\Component\Validator\ConstraintValidator;
+use Symfony\Component\Validator\Exception\LogicException;
 use Symfony\Component\Validator\Exception\UnexpectedTypeException;
 
 /**
@@ -68,11 +69,12 @@ public function validate($value, Constraint $constraint)
             return;
         }
 
-        // @deprecated since Symfony 4.2
+        // @deprecated since Symfony 4.2, will throw in 5.0
         if (class_exists(Intl::class)) {
             $validCountryCode = isset(Intl::getRegionBundle()->getCountryNames()[substr($canonicalize, 4, 2)]);
         } else {
             $validCountryCode = ctype_alpha(substr($canonicalize, 4, 2));
+            // throw new LogicException('The "symfony/intl" component is required to use the Bic constraint.');
         }
 
         if (!$validCountryCode) {

Constraints/Country.php

@@ -11,7 +11,9 @@
 
 namespace Symfony\Component\Validator\Constraints;
 
+use Symfony\Component\Intl\Intl;
 use Symfony\Component\Validator\Constraint;
+use Symfony\Component\Validator\Exception\LogicException;
 
 /**
  * @Annotation
@@ -28,4 +30,14 @@ class Country extends Constraint
     );
 
     public $message = 'This value is not a valid country.';
+
+    public function __construct($options = null)
+    {
+        if (!class_exists(Intl::class)) {
+            // throw new LogicException(sprintf('The "symfony/intl" component is required to use the "%s" constraint.', __CLASS__));
+            @trigger_error(sprintf('Using the "%s" constraint without the "symfony/intl" component installed is deprecated since Symfony 4.2.', __CLASS__), E_USER_DEPRECATED);
+        }
+
+        parent::__construct($options);
+    }
 }

Constraints/Currency.php

@@ -11,7 +11,9 @@
 
 namespace Symfony\Component\Validator\Constraints;
 
+use Symfony\Component\Intl\Intl;
 use Symfony\Component\Validator\Constraint;
+use Symfony\Component\Validator\Exception\LogicException;
 
 /**
  * @Annotation
@@ -29,4 +31,14 @@ class Currency extends Constraint
     );
 
     public $message = 'This value is not a valid currency.';
+
+    public function __construct($options = null)
+    {
+        if (!class_exists(Intl::class)) {
+            // throw new LogicException(sprintf('The "symfony/intl" component is required to use the "%s" constraint.', __CLASS__));
+            @trigger_error(sprintf('Using the "%s" constraint without the "symfony/intl" component installed is deprecated since Symfony 4.2.', __CLASS__), E_USER_DEPRECATED);
+        }
+
+        parent::__construct($options);
+    }
 }

Constraints/Email.php

@@ -11,7 +11,9 @@
 
 namespace Symfony\Component\Validator\Constraints;
 
+use Egulias\EmailValidator\EmailValidator as StrictEmailValidator;
 use Symfony\Component\Validator\Constraint;
+use Symfony\Component\Validator\Exception\LogicException;
 
 /**
  * @Annotation
@@ -67,5 +69,10 @@ public function __construct($options = null)
         }
 
         parent::__construct($options);
+
+        if ((self::VALIDATION_MODE_STRICT === $this->mode || true === $this->strict) && !class_exists(StrictEmailValidator::class)) {
+            // throw new LogicException(sprintf('The "egulias/email-validator" component is required to use the "%s" constraint.', __CLASS__));
+            @trigger_error(sprintf('Using the "%s" constraint without the "egulias/email-validator" component installed is deprecated since Symfony 4.2.', __CLASS__), E_USER_DEPRECATED);
+        }
     }
 }

Constraints/Expression.php

@@ -11,7 +11,9 @@
 
 namespace Symfony\Component\Validator\Constraints;
 
+use Symfony\Component\ExpressionLanguage\ExpressionLanguage;
 use Symfony\Component\Validator\Constraint;
+use Symfony\Component\Validator\Exception\LogicException;
 
 /**
  * @Annotation
@@ -32,6 +34,16 @@ class Expression extends Constraint
     public $expression;
     public $values = array();
 
+    public function __construct($options = null)
+    {
+        if (!class_exists(ExpressionLanguage::class)) {
+            // throw new LogicException(sprintf('The "symfony/expression-language" component is required to use the "%s" constraint.', __CLASS__));
+            @trigger_error(sprintf('Using the "%s" constraint without the "symfony/expression-language" component installed is deprecated since Symfony 4.2.', __CLASS__), E_USER_DEPRECATED);
+        }
+
+        parent::__construct($options);
+    }
+
     /**
      * {@inheritdoc}
      */

Constraints/Language.php

@@ -11,7 +11,9 @@
 
 namespace Symfony\Component\Validator\Constraints;
 
+use Symfony\Component\Intl\Intl;
 use Symfony\Component\Validator\Constraint;
+use Symfony\Component\Validator\Exception\LogicException;
 
 /**
  * @Annotation
@@ -28,4 +30,14 @@ class Language extends Constraint
     );
 
     public $message = 'This value is not a valid language.';
+
+    public function __construct($options = null)
+    {
+        if (!class_exists(Intl::class)) {
+            // throw new LogicException(sprintf('The "symfony/intl" component is required to use the "%s" constraint.', __CLASS__));
+            @trigger_error(sprintf('Using the "%s" constraint without the "symfony/intl" component installed is deprecated since Symfony 4.2.', __CLASS__), E_USER_DEPRECATED);
+        }
+
+        parent::__construct($options);
+    }
 }

Constraints/Locale.php

@@ -11,7 +11,9 @@
 
 namespace Symfony\Component\Validator\Constraints;
 
+use Symfony\Component\Intl\Intl;
 use Symfony\Component\Validator\Constraint;
+use Symfony\Component\Validator\Exception\LogicException;
 
 /**
  * @Annotation
@@ -36,6 +38,11 @@ public function __construct($options = null)
             @trigger_error('The "canonicalize" option with value "false" is deprecated since Symfony 4.1, set it to "true" instead.', E_USER_DEPRECATED);
         }
 
+        if (!class_exists(Intl::class)) {
+            // throw new LogicException(sprintf('The "symfony/intl" component is required to use the "%s" constraint.', __CLASS__));
+            @trigger_error(sprintf('Using the "%s" constraint without the "symfony/intl" component installed is deprecated since Symfony 4.2.', __CLASS__), E_USER_DEPRECATED);
+        }
+
         parent::__construct($options);
     }
 }