Fix issue processwire/processwire-issues#774

wire/modules/Inputfield/InputfieldFile/InputfieldFile.js

@@ -397,18 +397,34 @@ $(document).ready(function() {
 						'<span class="InputfieldFileStats"> &bull; ' + message + '</span></p></li>';
 				}
 				
+				var errorMsg = '';
+
 				if(typeof files !== "undefined") {
 					for(var i=0, l=files.length; i<l; i++) {
 
 						var extension = files[i].name.split('.').pop().toLowerCase();
 
 						if(extensions.indexOf(extension) == -1) {
-							$fileList.append(errorItem(files[i].name, extension + ' is a invalid file extension, please use one of:  ' + extensions)); 
+							if(typeof ProcessWire.config.InputfieldFile.labels['bad-ext'] != "undefined") {
+								errorMsg = ProcessWire.config.InputfieldFile.labels['bad-ext'];
+								errorMsg = errorMsg.replace('EXTENSIONS', extensions); 
+							} else {
+								errorMsg = extension + ' is a invalid file extension, please use one of: ' + extensions;
+							}
+							$fileList.append(errorItem(files[i].name, errorMsg)); 
 
 						} else if(files[i].size > maxFilesize && maxFilesize > 2000000) {
 							// I do this test only if maxFilesize is at least 2M (php default). 
 							// There might (not sure though) be some issues to get that value so don't want to overvalidate here -apeisa
-							$fileList.append(errorItem(files[i].name, 'Filesize ' + parseInt(files[i].size / 1024, 10) +' kb is too big. Maximum allowed is ' + parseInt(maxFilesize / 1024, 10) + ' kb')); 
+							var maxKB = parseInt(maxFilesize / 1024, 10);
+							if(typeof ProcessWire.config.InputfieldFile.labels['too-big'] != "undefined") {
+								errorMsg = ProcessWire.config.InputfieldFile.labels['too-big']; 
+								errorMsg = errorMsg.replace('MAX_KB', maxKB); 
+							} else {
+								var fileSize = parseInt(files[i].size / 1024, 10);
+								errorMsg = 'Filesize ' + fileSize +' kb is too big. Maximum allowed is ' + maxKB + ' kb';
+							}
+							$fileList.append(errorItem(files[i].name, errorMsg)); 
 
 						} else {
 							uploadFile(files[i]);

wire/modules/Inputfield/InputfieldFile/InputfieldFile.module

@@ -636,6 +636,10 @@ class InputfieldFile extends Inputfield implements InputfieldItemList, Inputfiel
 	}
 
 	public function renderReady(Inputfield $parent = null, $renderValueMode = false) {
+		
+		/** @var Config $config */
+		$config = $this->wire('config');
+		
 		$this->addClass('InputfieldNoFocus', 'wrapClass');
 		if(!$renderValueMode) $this->addClass('InputfieldHasUpload', 'wrapClass');
 		
@@ -644,7 +648,6 @@ class InputfieldFile extends Inputfield implements InputfieldItemList, Inputfiel
 			$this->addClass('InputfieldFileHasTags', 'wrapClass');
 			if($this->useTags >= FieldtypeFile::useTagsPredefined && $this->hasField) {
 				// predefined tags
-				$config = $this->wire('config');
 				$fieldName = $this->hasField->name;
 				$jsName = "InputfieldFileTags_$fieldName";
 				$allowUserTags = $this->useTags & FieldtypeFile::useTagsNormal;
@@ -674,6 +677,15 @@ class InputfieldFile extends Inputfield implements InputfieldItemList, Inputfiel
 			}
 		}
 		
+		$data = $config->js('InputfieldFile');
+		if(!is_array($data)) $data = array();
+		if(empty($data['labels'])) $data['labels'] = array();
+		if(empty($data['labels']['bad-ext'])) {
+			$data['labels']['bad-ext'] = $this->_('Unsupported file extension, please use only: EXTENSIONS');
+			$data['labels']['too-big'] = $this->_('File is too big - maximum allowed size is MAX_KB kb');
+			$config->js('InputfieldFile', $data); 
+		}
+		
 		$this->getItemInputfields(); // custom fields ready
 		
 		return parent::renderReady($parent, $renderValueMode); 

wire/modules/Inputfield/InputfieldImage/InputfieldImage.js

@@ -2192,7 +2192,12 @@ function InputfieldImage($) {
 					var message;
 
 					if(extensions.indexOf(extension) == -1) {
+						if(typeof ProcessWire.config.InputfieldFile.labels['bad-ext'] != "undefined") {
+							message = ProcessWire.config.InputfieldFile.labels['bad-ext'];
+							message = message.replace('EXTENSIONS', extensions);
+						} else {
 							message = extension + ' is a invalid file extension, please use one of:  ' + extensions;
+						}
 						$errorParent.append(errorItem(message, files[i].name));
 
 					} else if(!useClientResize && files[i].size > maxFilesize && maxFilesize > 2000000) {
@@ -2200,8 +2205,12 @@ function InputfieldImage($) {
 						// There might (not sure though) be some issues to get that value so don't want to overvalidate here -apeisa
 						var filesizeKB = toKilobyte(files[i].size),
 							maxFilesizeKB = toKilobyte(maxFilesize);
-
+						if(typeof ProcessWire.config.InputfieldFile.labels['too-big'] != "undefined") {
+							message = ProcessWire.config.InputfieldFile.labels['too-big'];
+							message = message.replace('MAX_KB', maxFilesizeKB);
+						} else {
 							message = 'Filesize ' + filesizeKB + ' kb is too big. Maximum allowed is ' + maxFilesizeKB + ' kb';
+						}
 						$errorParent.append(errorItem(message, files[i].name));
 						
 					} else if(typeof xhr != "undefined") {