FileHelper class

A utility class that defines file type extensions and related constants.

The FileHelper class provides centralized access to the file extensions supported by your application for various media types (images, audio, video, documents), as well as general file constraints such as size limits.

It is typically used in upload validation, file picking, or MIME type inference.

Example usage:

if (FileHelper.imageExtensions.contains(extension)) {
  print('Selected file is an image');
}

if (fileSize > FileHelper.maxSizeInBytes) {
  throw Exception('File too large');
}

Constructors

FileHelper()

Properties

hashCode → int
The hash code for this object.
no setterinherited
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited

Methods

noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
toString() → String
A string representation of this object.
inherited

Operators

operator ==(Object other) → bool
The equality operator.
inherited

Static Properties

allSupportedExtensions → List<String>
Returns a combined list of all supported file extensions.
no setter
audioExtensions → List<String>
Returns a list of supported audio file extensions.
no setter
documentExtensions → List<String>
Returns a list of supported document file extensions.
no setter
imageExtensions → List<String>
Returns a list of supported image file extensions.
no setter
maxSizeInBytes → double
no setter
videoExtensions → List<String>
Returns a list of supported video file extensions.
no setter