UploadControl: appends HTML attribute 'accept' [Closes #172]

Author: dg

composer.json

@@ -17,7 +17,7 @@
 	"require": {
 		"php": ">=7.1",
 		"nette/component-model": "^3.0.0-beta2",
-		"nette/http": "^2.3.8 || ~3.0.0",
+		"nette/http": "~3.0.0",
 		"nette/utils": "^3.0-beta2"
 	},
 	"require-dev": {

src/Forms/Controls/UploadControl.php

@@ -97,4 +97,18 @@ public function isOk(): bool
 				return $carry && $fileUpload->isOk();
 			}, true);
 	}
+
+
+	/**
+	 * @return static
+	 */
+	public function addRule($validator, $errorMessage = null, $arg = null)
+	{
+		if ($validator === Forms\Form::IMAGE) {
+			$this->control->accept = implode(FileUpload::IMAGE_MIME_TYPES, ', ');
+		} elseif ($validator === Forms\Form::MIME_TYPE) {
+			$this->control->accept = implode((array) $arg, ', ');
+		}
+		return parent::addRule($validator, $errorMessage, $arg);
+	}
 }

tests/Forms/Controls.UploadControl.render.phpt

@@ -63,6 +63,19 @@ test(function () { // validation rules
 });
 
 
+test(function () { // accepted files
+	$form = new Form;
+	$input = $form->addUpload('file1')->setRequired(false)->addRule(Form::MIME_TYPE, null, 'image/*');
+	Assert::same('<input type="file" name="file1" accept="image/*" id="frm-file1" data-nette-rules=\'[{"op":"optional"},{"op":":mimeType","msg":"The uploaded file is not in the expected format.","arg":"image/*"}]\'>', (string) $input->getControl());
+
+	$input = $form->addUpload('file2')->setRequired(false)->addRule(Form::MIME_TYPE, null, ['image/*', 'text/html']);
+	Assert::same('<input type="file" name="file2" accept="image/*, text/html" id="frm-file2" data-nette-rules=\'[{"op":"optional"},{"op":":mimeType","msg":"The uploaded file is not in the expected format.","arg":["image/*","text/html"]}]\'>', (string) $input->getControl());
+
+	$input = $form->addUpload('file3')->setRequired(false)->addRule(Form::IMAGE);
+	Assert::same('<input type="file" name="file3" accept="image/gif, image/png, image/jpeg, image/webp" id="frm-file3" data-nette-rules=\'[{"op":"optional"},{"op":":image","msg":"The uploaded file must be image in format JPEG, GIF, PNG or WebP."}]\'>', (string) $input->getControl());
+});
+
+
 test(function () { // container
 	$form = new Form;
 	$container = $form->addContainer('container');