<?php
/**
 * This file belongs to the YIT Framework.
 *
 * This source file is subject to the GNU GENERAL PUBLIC LICENSE (GPL 3.0)
 * that is bundled with this package in the file LICENSE.txt.
 * It is also available through the world-wide-web at this URL:
 * http://www.gnu.org/licenses/gpl-3.0.txt
 */


if (!defined('ABSPATH')) {
    exit;
} // Exit if accessed directly

if (!class_exists('YIT_Metabox')) {
    /**
     * YIT Metabox
     *
     * the metabox can be created using this code
     * <code>
     * $args1 = array(
     *      'label'    => __( 'Metabox Label', 'yith-plugin-fw' ),
     *      'pages'    => 'page',   //or array( 'post-type1', 'post-type2')
     *      'context'  => 'normal', //('normal', 'advanced', or 'side')
     *      'priority' => 'default',
     *      'tabs'     => array(
     *                 'settings' => array( //tab
     *                          'label'  => __( 'Settings', 'yith-plugin-fw' ),
     *                          'fields' => array(
     *                          'meta_checkbox' => array(
     *                                 'label'    => __( 'Show title', 'yith-plugin-fw' ),
     *                                 'desc'     => __( 'Choose whether to show title of the page or not.', 'yith-plugin-fw' ),
     *                                 'type'     => 'checkbox',
     *                                 'private'  => false,
     *                                 'std'      => '1'),
     *                            ),
     *                      ),
     *  );
     *
     * $metabox1 = YIT_Metabox( 'yit-metabox-id' );
     * $metabox1->init( $args );
     * </code>
     *
     * @class YIT_Metaboxes
     * @package    Yithemes
     * @since      1.0.0
     * @author     Emanuela Castorina <emanuela.castorina@yithemes.com>
     *
     */
    class YIT_Metabox
    {

        /**
         * @var string the id of metabox
         *
         * @since 1.0
         */

        public $id;

        /**
         * @var array An array where are saved all metabox settings options
         *
         * @since 1.0
         */
        private $options = array();

        /**
         * @var array An array where are saved all tabs of metabox
         *
         * @since 1.0
         */
        private $tabs = array();

        /**
         * @var object The single instance of the class
         * @since 1.0
         */
        protected static $_instance = array();

        /**
         * Main Instance
         *
         * @static
         *
         * @param $id
         *
         * @return object Main instance
         *
         * @since  1.0
         * @author Antonino Scarfi' <antonino.scarfi@yithemes.com>
         */
        public static function instance($id)
        {
            if (!isset(self::$_instance[$id])) {
                self::$_instance[$id] = new self($id);
            }
            return self::$_instance[$id];
        }

        /**
         * Constructor
         *
         * @param string $id
         *
         * @return \YIT_Metabox
         * @since  1.0
         * @author Emanuela Castorina <emanuela.castorina@yithemes.it>
         */
        function __construct($id = '')
        {
            $this->id = $id;

        }


        /**
         * Init
         *
         * set options and tabs, add actions to register metabox, scripts and save data
         *
         * @param array $options
         *
         * @return void
         * @since    1.0
         * @author   Emanuela Castorina <emanuela.castorina@yithemes.it>
         */
        public function init($options = array())
        {

            $this->set_options($options);
            $this->set_tabs();


            add_action('add_meta_boxes', array($this, 'register_metabox'));
            add_action('save_post', array($this, 'save_postdata'));
            add_action('admin_enqueue_scripts', array($this, 'enqueue'), 15);

        }

        /**
         * Enqueue script and styles in admin side
         *
         * Add style and scripts to administrator
         *
         * @return void
         * @since    1.0
         * @author   Emanuela Castorina <emanuela.castorina@yithemes.it>
         */
        public function enqueue()
        {

            wp_enqueue_media();
            wp_enqueue_style('wp-color-picker');
            wp_enqueue_style('yit-plugin-metaboxes', YIT_CORE_PLUGIN_URL . '/assets/css/metaboxes.css');
            wp_enqueue_style('jquery-chosen', YIT_CORE_PLUGIN_URL . '/assets/css/chosen/chosen.css');
            wp_enqueue_script('jquery-ui-datepicker');
            wp_enqueue_script('yit-spinner', YIT_CORE_PLUGIN_URL . '/assets/js/panel.spinner.js', array('jquery'), '0.0.1', true);
            wp_enqueue_script('jquery-chosen', YIT_CORE_PLUGIN_URL . '/assets/js/chosen/chosen.jquery.js', array('jquery'), '1.1.0', true);
            wp_enqueue_script('ajax-chosen', yit_load_js_file(YIT_CORE_PLUGIN_URL . '/assets/js/chosen/ajax-chosen.jquery.js'), array('jquery'), '1.1.0', true);
            wp_enqueue_script('yit-metabox', YIT_CORE_PLUGIN_URL . '/assets/js/metabox.js', array('jquery', 'wp-color-picker'), '1.0.0', true);
            wp_enqueue_style('jquery-ui-overcast', YIT_CORE_PLUGIN_URL . '/assets/css/overcast/jquery-ui-1.8.9.custom.css', false, '1.8.9', 'all');
        }

        /**
         * Set Options
         *
         * Set the variable options
         *
         * @param array $options
         *
         * @return void
         * @since    1.0
         * @author   Emanuela Castorina <emanuela.castorina@yithemes.it>
         */
        public function set_options($options = array())
        {
            $this->options = $options;

        }

        /**
         * Set Tabs
         *
         * Set the variable tabs
         *
         * @internal param array $tabs
         *
         * @return void
         * @since    1.0
         * @author   Emanuela Castorina <emanuela.castorina@yithemes.it>
         */
        public function set_tabs()
        {
            if (!isset($this->options['tabs'])) {
                return;
            }
            $this->tabs = $this->options['tabs'];
            if (isset($this->tabs['settings']['fields'])) {
                $this->tabs['settings']['fields'] = array_filter($this->tabs['settings']['fields']);
            }
        }


        /**
         * Add Tab
         *
         * Add a tab inside the metabox
         *
         * @internal param array $tabs
         *
         * @param array $tab the new tab to add to the metabox
         * @param string $where tell where insert the tab if after or before a $refer
         * @param null $refer an existent tab inside metabox
         *
         * @return void
         * @since    1.0
         * @author   Emanuela Castorina <emanuela.castorina@yithemes.it>
         */
        public function add_tab($tab, $where = 'after', $refer = null)
        {
            if (!is_null($refer)) {
                $ref_pos = array_search($refer, array_keys($this->tabs));
                if ($ref_pos !== false) {
                    if ($where == 'after') {
                        $this->tabs = array_slice($this->tabs, 0, $ref_pos + 1, true) +
                            $tab +
                            array_slice($this->tabs, $ref_pos + 1, count($this->tabs) - 1, true);
                    } else {
                        $this->tabs = array_slice($this->tabs, 0, $ref_pos, true) +
                            $tab +
                            array_slice($this->tabs, $ref_pos, count($this->tabs), true);
                    }
                }
            } else {
                $this->tabs = array_merge($tab, $this->tabs);
            }

        }

        /**
         * Remove Tab
         *
         * Remove a tab from the tabs of metabox
         *
         * @internal param array $tabs
         *
         * @param $id_tab
         *
         * @return void
         * @since    1.0
         * @author   Emanuela Castorina <emanuela.castorina@yithemes.it>
         */
        public function remove_tab($id_tab)
        {
            if (isset($this->tabs[$id_tab])) {
                unset ($this->tabs[$id_tab]);
            }
        }


        /**
         * Add Field
         *
         * Add a field inside a tab of metabox
         *
         * @internal param array $tabs
         *
         * @param string $tab_id the id of the tabs where add the field
         * @param array $args the  field to add
         * @param string $where tell where insert the field if after or before a $refer
         * @param null $refer an existent field inside tab
         *
         * @return void
         * @since    1.0
         * @author   Emanuela Castorina <emanuela.castorina@yithemes.it>
         */
        public function add_field($tab_id, $args, $where = 'after', $refer = null)
        {
            if (isset($this->tabs[$tab_id])) {

                $cf = $this->tabs[$tab_id]['fields'];
                if (!is_null($refer)) {
                    $ref_pos = array_search($refer, array_keys($cf));
                    if ($ref_pos !== false) {
                        if ($where == 'after') {
                            $this->tabs[$tab_id]['fields'] = array_slice($cf, 0, $ref_pos + 1, true) +
                                $args +
                                array_slice($cf, $ref_pos, count($cf) - 1, true);

                        } elseif ($where == 'before') {
                            $this->tabs[$tab_id]['fields'] = array_slice($cf, 0, $ref_pos, true) +
                                $args +
                                array_slice($cf, $ref_pos, count($cf), true);

                        }
                    }
                } else {
                    if ($where == 'first') {
                        $this->tabs[$tab_id]['fields'] = $args + $cf;

                    } else {
                        $this->tabs[$tab_id]['fields'] = array_merge($this->tabs[$tab_id]['fields'], $args);
                    }
                }

            }


        }

        /**
         * Remove Field
         *
         * Remove a field from the metabox, search inside the tabs and remove it if exists
         *
         * @param $id_field
         *
         * @return void
         * @since    1.0
         * @author   Emanuela Castorina <emanuela.castorina@yithemes.it>
         */
        public function remove_field($id_field)
        {
            foreach ($this->tabs as $tab_name => $tab) {
                if (isset($tab['fields'][$id_field])) {
                    unset ($this->tabs[$tab_name]['fields'][$id_field]);
                }
            }
        }

        /**
         * Reorder tabs
         *
         * Order the tabs and fields and set id and name to each field
         *
         * @internal param $id_field
         *
         * @return void
         * @since  1.0
         * @author Emanuela Castorina <emanuela.castorina@yithemes.it>
         */
        public function reorder_tabs()
        {
            foreach ($this->tabs as $tab_name => $tab) {
                foreach ($tab['fields'] as $id_field => $field) {
                    $this->tabs[$tab_name]['fields'][$id_field]['private'] = (isset($field['private'])) ? $field['private'] : true;
                    $this->tabs[$tab_name]['fields'][$id_field]['id'] = $this->get_option_metabox_id($id_field, $this->tabs[$tab_name]['fields'][$id_field]['private']);
                    $this->tabs[$tab_name]['fields'][$id_field]['name'] = $this->get_option_metabox_name($this->tabs[$tab_name]['fields'][$id_field]['id']);
                }
            }

        }


        /**
         * Get Option Metabox ID
         *
         * return the id of the field
         *
         * @param string $id_field
         * @param bool $private if private add an _befor the id
         *
         * @return string
         * @since  1.0
         * @author Emanuela Castorina <emanuela.castorina@yithemes.it>
         */
        public function get_option_metabox_id($id_field, $private = true)
        {
            if ($private) {
                return '_' . $id_field;
            } else {
                return $id_field;
            }
        }

        /**
         * Get Option Metabox Name
         *
         * return the name of the field, this name will be used as attribute name of the input field
         *
         * @param string $id_field
         * @param bool $private if private add an _befor the id
         *
         * @return string
         * @since  1.0
         * @author Emanuela Castorina <emanuela.castorina@yithemes.it>
         */
        public function get_option_metabox_name($id_field, $private = true)
        {
            $db_name = apply_filters('yit_metaboxes_option_main_name', 'yit_metaboxes');
            $return = $db_name . '[';

            if (!strpos($id_field, '[')) {
                return $return . $id_field . ']';
            }
            $return .= substr($id_field, 0, strpos($id_field, '['));
            $return .= ']';
            $return .= substr($id_field, strpos($id_field, '['));

            return $return;
        }

        /**
         * Register the metabox
         *
         * call the wp function add_metabox to add the metabox
         *
         *
         * @return void
         * @since    1.0
         * @author   Emanuela Castorina <emanuela.castorina@yithemes.it>
         */
        public function register_metabox($post_type)
        {
            if (in_array($post_type, (array)$this->options['pages'])) {
                add_meta_box($this->id, $this->options['label'], array($this, 'show'), $post_type, $this->options['context'], $this->options['priority']);
            }
        }

        /**
         * Show metabox
         *
         * show the html of metabox
         *
         *
         * @return void
         * @since    1.0
         * @author   Emanuela Castorina <emanuela.castorina@yithemes.it>
         */
        public function show()
        {
            $this->reorder_tabs();

            yit_plugin_get_template(YIT_CORE_PLUGIN_PATH, 'metaboxes/tab.php', array('tabs' => $this->tabs));
        }

        /**
         * Save Post Data
         *
         * Save the post data in the database when save the post
         *
         * @param $post_id
         *
         * @return int
         * @since  1.0
         * @author Emanuela Castorina <emanuela.castorina@yithemes.it>
         */
        public function save_postdata($post_id)
        {


            if (!isset($_POST['yit_metaboxes_nonce']) || !wp_verify_nonce($_POST['yit_metaboxes_nonce'], 'metaboxes-fields-nonce')) {
                return $post_id;
            }


            if ((defined('DOING_AUTOSAVE') && DOING_AUTOSAVE) || (defined('DOING_AJAX') && DOING_AJAX)) {
                return $post_id;
            }

            if (isset($_POST['post_type'])) {
                $post_type = $_POST['post_type'];
            } else {
                return $post_id;
            }

            if ('page' == $post_type) {
                if (!current_user_can('edit_page', $post_id)) {
                    return $post_id;
                }
            } else {
                if (!current_user_can('edit_post', $post_id)) {
                    return $post_id;
                }
            }

            if (!in_array($post_type, (array)$this->options['pages'])) {
                return $post_id;
            }

            $this->reorder_tabs();


            foreach ($this->tabs as $tab) {

                foreach ($tab['fields'] as $field) {

                    if (in_array($field['type'], array('title'))) {
                        continue;
                    }

                    if (isset($_POST['yit_metaboxes'][$field['id']])) {

                        add_post_meta($post_id, $field['id'], $_POST['yit_metaboxes'][$field['id']], true) || update_post_meta($post_id, $field['id'], $_POST['yit_metaboxes'][$field['id']]);
                    } elseif (in_array($field['type'], array('onoff', 'checkbox'))) {
                        update_post_meta($post_id, $field['id'], '0');
                    } else {
                        delete_post_meta($post_id, $field['id']);
                    }
                }
            }


        }

        /**
         * Remove Fields
         *
         * Remove a fields list from the metabox, search inside the tabs and remove it if exists
         *
         * @param $id_fields
         *
         * @return   void
         * @since    2.0.0
         * @author   Andrea Grillo <andrea.grillo@yithemes.com>
         */
        public function remove_fields($id_fields)
        {
            foreach ($id_fields as $k => $field) {
                $this->remove_field($field);
            }
        }
    }
}

if (!function_exists('YIT_Metabox')) {

    /**
     * Main instance of plugin
     *
     * @param $id
     *
     * @return \YIT_Metabox
     * @since  1.0
     * @author Emanuela Castorina <emanuela.castorina@yithemes.it>
     */


    function YIT_Metabox($id)
    {
        return YIT_Metabox::instance($id);
    }
}




