<?php
    class Element {
        protected $_id;
        protected $_classes = array();
        protected $_style = array();

        protected $_elements = array();
        protected $_idx = 0;

        public function addClass($class) {
            $this->_classes[] = $class;
        }

        public function setId($id) {
            $this->_id = $id;
        }

        protected function hasClassAttr() {
            $ret = false;

            if ($this->getClassAttr() != "") $ret = true;

            return $ret;
        }

        protected function getClassAttr() {
            $class_attr = "";

            if (count($this->_classes)) {
                $class_attr = 'class="';

                foreach ($this->_classes as $class) {
                    $class_attr .= "$class ";
                }

                $class_attr  = rtrim($class_attr);
                $class_attr .= '"';
            }

            /*if ($class_attr == "") return false;
            else return $class_attr;*/
            return $class_attr;

        }

        protected function hasIdAttr() {
            $ret = false;

            if ($this->getIdAttr() != "") $ret = true;

            return $ret;
        }

        protected function getIdAttr() {
            $id_attr = "";

            if ($this->_id != "") {
                $id_attr = sprintf('id="%s"', $this->_id);
            }

            /* if ($id_attr == "") return false;
            else return $id_attr; */
            return $id_attr;
        }

        protected function hasStyleAttr() {
            $ret = false;

            if ($this->getStyleAttr() != "") $ret = true;

            return $ret;
        }

        protected function getStyleAttr() {
            $style_attr = "";

            if (count($this->_style)) {
                $style_attr = 'style="';

                foreach ($this->_style as $key => $value) {
                    $style_attr .= "$key: $value; ";
                }

                $style_attr  = rtrim($style_attr);
                $style_attr .= '"';
            }

            /*if ($class_attr == "") return false;
            else return $class_attr;*/
            return $style_attr;
        }


        public function addStyle($attr, $value) {
            $this->_style[$attr] = $value;
        }

        public function html() {
            return "";
        }

        public function show() {
            echo $this->html();
        }

        public function add($element) {
            $this->_elements[$this->_idx] = $element;
            $this->_idx++;
        }
    }
?>