UploadSelectFileParamWidget.js
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UploadSelectFileParamWidget.js
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	/**
	* A wrapper for OO.ui.SelectFileInputWidget
	*
	* @class
	* @private
	* @constructor
	*/
	function UploadSelectFileParamWidget() {
	UploadSelectFileParamWidget.super.call( this );
	}

	OO.inheritClass( UploadSelectFileParamWidget, OO.ui.SelectFileInputWidget );

	/**
	* @return {string}
	*/
	UploadSelectFileParamWidget.prototype.getApiValueForDisplay = function () {
	return '...';
	};

	/**
	* @return {boolean}
	*/
	UploadSelectFileParamWidget.prototype.requiresFormData = function () {
	return true;
	};

	/**
	* @return {any}
	*/
	UploadSelectFileParamWidget.prototype.getApiValue = function () {
	return this.getValue();
	};

	/**
	* There should be `@param {any} newValue` but that results in
	* `no-unused-vars` eslint rule failing
	*/
	UploadSelectFileParamWidget.prototype.setApiValue = function () {
	// No-op
	};

	/**
	* @param {boolean} shouldSuppressErrors
	* @return {jQuery.Promise}
	*/
	UploadSelectFileParamWidget.prototype.apiCheckValid = function ( shouldSuppressErrors ) {
	const ok = this.getValue() !== null && this.getValue() !== undefined \|\| shouldSuppressErrors;
	this.info.setIcon( ok ? null : 'alert' );
	this.setTitle( ok ? '' : mw.message( 'apisandbox-alert-field' ).plain() );
	return $.Deferred().resolve( ok ).promise();
	};

	module.exports = UploadSelectFileParamWidget;