<?php

/*
  WPFront Plugins Options Base
  Copyright (C) 2013, WPFront.com
  Website: wpfront.com
  Contact: syam@wpfront.com

  WPFront Plugins are distributed under the GNU General Public License, Version 3,
  June 2007. Copyright (C) 2007 Free Software Foundation, Inc., 51 Franklin
  St, Fifth Floor, Boston, MA 02110, USA

  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
  ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
  ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
  ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

if (!class_exists('WPFront_Options_Base')) {

    /**
     * Options framework base class
     *
     * @author Syam Mohan <syam@wpfront.com>
     * @copyright 2013 WPFront.com
     */
    class WPFront_Options_Base {

        //variables to hold options data
        public $__data = array();
        public $__optionName;
        public $__localizeSlug;
        public $__options;
        private $lastOptionName;
        private $optionNames;

        function __construct($optionName, $localizeSlug) {
            $this->__optionName = $optionName;
            $this->__localizeSlug = $localizeSlug;

            $this->__options = get_option($this->__optionName);

            if (!is_array($this->__options)) {
                $this->__options = array();
            }

            $this->optionNames = array();
        }

        //defines option with data
        protected function addOption($name, $type, $default, $validate = NULL) {
            if (isset($this->__data[$name])) {
                echo 'Duplicate option ' . $name;
                return $this;
            }
            $this->__data[$name]['name'] = $name;
            $this->__data[$name]['type'] = $type;
            $this->__data[$name]['default'] = $default;
            $this->__data[$name]['validate'] = isset($validate) ? $validate : array(&$this, 'validate_default');
            
            //dynamic function returning option value
            $this->__data[$name]['func'] = create_function('$self, $data', '
                $value = NULL;
                if(array_key_exists($data["name"], $self->__options))
                    $value = $self->__options[$data["name"]];
                return $self->get_value($data["type"], $value, $data["default"], $data["validate"]);
            ');
            
            $this->__data[$name . '_name'] = $this->__data[$name];
            //dynamic function returning option name for settings page
            $this->__data[$name . '_name']['func'] = create_function('$self, $data', '
                return $self->__optionName . "[" . $data["name"] . "]";
            ');
            
            $this->__data[$name . '_label'] = $this->__data[$name];
            
            //dynamic function returning option label for settings page
            $this->__data[$name . '_label']['func'] = create_function('$self, $data', '
                return __($data["label"], $self->__localizeSlug);
            ');

            $this->lastOptionName = $name;
            array_push($this->optionNames, $name);

            return $this;
        }

        //default validation function
        private function validate_default($arg) {
            return $arg;
        }

        //validates a zero or positive number
        protected function validate_zero_positive($arg) {
            if ($arg < 0) {
                return 0;
            }

            return $arg;
        }

        //sets the label of the option, for POEDIT compatibility
        protected function __($label) {
            $this->__data[$this->lastOptionName . '_label']['label'] = $label;
        }

        //returns the value of option
        public function get_value($type, $value, $default, $validate) {
            if (!isset($value)) {
                return $default;
            }

            switch ($type) {
                case 'bool':
                    return (bool) $value;
                case 'int':
                    return call_user_func($validate, intval($value));
                case 'float':
                    return call_user_func($validate, floatval($value));
                case 'string':
                    return call_user_func($validate, strval($value));
            }
            return $value;
        }

        //returns optons array
        public function get_options() {
            $options = array();
            foreach ($this->optionNames as $val) {
                $options[$val] = $this->$val();
            }
            return $options;
        }

        //PHP magic function to call dynamic methods
        public function __call($name, array $args) {
            if (!array_key_exists($name, $this->__data)) {
                echo '"' . $name . '" option not yet added';
                return;
            }

            array_unshift($args, $this->__data[$name]);
            array_unshift($args, $this);
            return call_user_func_array($this->__data[$name]['func'], $args);
        }

    }

}
