silverstripe-framework/forms/CurrencyField.php

<?php

/**
 * Currency field.
 */
class CurrencyField extends TextField {
	/**
	 * allows the value to be set ( not including $ signs and number format...)
	 */
	function setValue($val) {
		$this->value = '$' . number_format(ereg_replace('[^0-9.]',"",$val), 2);
	}
	/**
	 * Overwrite the datavalue before saving to the db ;-)
	 */
	function dataValue() {
		if($this->value){
			return ereg_replace('[^0-9.]',"", $this->value);
		}else{
			return 0.00;
		}
	}
	/**
	 * Create a new class for this field
	 */
	function performReadonlyTransformation() {
		
		return new CurrencyField_Readonly($this->name, $this->title, $this->value);
		
		/*
		$this is-a object and cant be passed as_a string of the first parameter of formfield constructor.
		return new CurrencyField_Readonly($this);
		*/
	}
	
	/**
	 * @see http://regexlib.com/REDetails.aspx?regexp_id=126
	 */
	function jsValidation() {
		$formID = $this->form->FormName();
		
		$jsFunc =<<<JS
Behaviour.register({
	"#$formID": {
		validateCurrency: function(fieldName) {
			var el = _CURRENT_FORM.elements[fieldName];
			if(!el || !el.value) return true;
			
			var value = \$F(el);
			if(value.length > 0 && !value.match(/^\\$?(\d{1,3}(\,\d{3})*|(\d+))(\.\d{2})?\$/)) {
				validationError(el,"Please enter a valid currency.","validation",false);
				return false;
			}
			return true;			
		}
	}
});
JS;

		Requirements::customScript($jsFunc, 'func_validateCurrency');

		return "\$('$formID').validateCurrency('$this->name');";
	}

	function validate() {
		if(!empty ($this->value) && !preg_match('/^\$?(\d{1,3}(\,\d{3})*|(\d+))(\.\d{2})?$/', $this->value)) {
			$validator->validationError($this->name, _t('Form.VALIDCURRENCY', "Please enter a valid currency."), "validation", false);
			return false;
		}
		return true;
	}
}

/**
 * Creates the appropriate readonly field for this class.
 */
class CurrencyField_Readonly extends ReadonlyField{
	
	/**
	 * overloaded to display the correctly formated value for this datatype 
	 */
	function Field() {
		if($this->value){
			$val = $this->dontEscape ? ($this->reserveNL?Convert::raw2xml($this->value):$this->value) : Convert::raw2xml($this->value);
			$val = '$' . number_format(ereg_replace('[^0-9.]',"",$val), 2);
			
		}else {
			$val = '<i>$0.00</i>';
		}
		$valforInput = $this->value ? Convert::raw2att($val) : "";
		return "<span class=\"readonly\" id=\"" . $this->id() . "\">$val</span><input type=\"hidden\" name=\"".$this->name."\" value=\"".$valforInput."\" />";
	}
	/**
	 * This already is a readonly field.
	 */
	function performReadonlyTransformation() {
		return $this;
	}
	
}

?>