<?php namespace ProcessWire;

/**
 * Inputfield for floating point numbers
 *
 * @property int $precision
 * 
 */

class InputfieldFloat extends InputfieldInteger {
	
	public static function getModuleInfo() {
		return array(
			'title' => __('Float', __FILE__), // Module Title
			'summary' => __('Floating point number with precision', __FILE__), // Module Summary
			'version' => 103,
			'permanent' => true, 
			);
	}

	public function __construct() {
		$this->set('precision', 2); 
		parent::__construct();
	}

	public function init() {
		parent::init();
		$this->attr('step', 'any'); // HTML5 attr required to support decimals with 'number' types
	}

	protected function sanitizeValue($value) {
		if(!is_float($value) && !is_int($value)) {
			$value = FieldtypeFloat::strToFloat((string) $value);
		}
		$precision = $this->precision; 
		if(is_null($precision)) $precision = FieldtypeFloat::getPrecision($value); 
		return strlen("$value") ? round((float) $value, $precision) : '';
	}

	/**
	 * Returns true if number is in valid range, false if not
	 *
	 * Overriding the function from InputfieldInteger to ensure float types (rather than int types) are used
	 * 
	 * @param float $value
	 * @return bool
	 *
	 */
	protected function isInRange($value) {
		$inRange = true;
		$min = $this->attr('min');
		$max = $this->attr('max');
		if(strlen("$value")) {
			if(strlen("$min") && ((float) $value) < ((float) $min)) {
				$inRange = false;
			}
			if(strlen("$max") && ((float) $value) > ((float) $max)) {
				$inRange = false;
			}
		}
		return $inRange;
	}

	/**
	 * Override method from Inputfield to properly handle HTML5 number values
	 * 
	 * @param array $attributes
	 * @return string
	 * 
	 */
	public function getAttributesString(array $attributes = null) {
		if($attributes && $attributes['type'] === 'number' && is_float($attributes['value'])) {
			if(strlen("$attributes[value]") && !ctype_digit(str_replace('.', '', $attributes['value']))) {
				// the HTML5 number input type requires "." as the decimal
				$locale = localeconv();
				$decimal = $locale['decimal_point'];
				if($decimal !== '.' && strpos("$attributes[value]", $decimal) !== false) {
					$parts = explode($decimal, $attributes['value'], 2);
					if(count($parts) == 2) {
						$attributes['value'] = implode('.', $parts);
					}
				}
			}
		}
		return parent::getAttributesString($attributes);
	}

}