<?php
/*
Class Name: Simple Options
Class URI: http://iworks.pl/
Description: Simple option class to manage options.
Version: 1.2.0
Author: Marcin Pietrzak
Author URI: http://iworks.pl/
License: GPLv2 or later
License URI: http://www.gnu.org/licenses/gpl-2.0.html

Copyright (c) 2017-2018 Incsub

this program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License, version 2, as
published by the Free Software Foundation.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA


== CHANGELOG ==

= 1.2.0 =
- Added "checkboxes" field type.
- Added "label_rich" to allow HTML rich label.

= 1.1.0 =
- Added "css_editor" field type.

= 1.0.9 =
- Added default "large-text" class to "textarea" and "email",

= 1.0.8 =
- Added "gallery" field type.

= 1.0.7 =
- Handle multiple value for select.

= 1.0.6 =
- Added sortable option.
- Added ability to hide default information.
- Fixed missing select value.

= 1.0.5 =
- Fixed problem with missing date.

= 1.0.4 =
- Added slave sections.
- Added select & select2 type.
- Added 'before' & 'after' parameter.
- Added 'skip_value' parameter to allow print mempty value.
- Fixed "hidden" field - remove TR/TD wraper.

= 1.0.3 =
- Added extra $value sanitization for wp_editor and textarea.
- Clean up "checkbox" input type.

= 1.0.2 =
- Move section description into "inside" div.

= 1.0.1 =
- Added description for section without fields.

= 1.0.0 =
- Init version.

 */

if ( ! defined( 'WPINC' ) ) {
	die;
}

if ( ! class_exists( 'simple_options' ) ) {

	class simple_options {

		private $loaded = array();

		public function __construct() {
			add_action( 'wp_ajax_simple_option', array( $this, 'ajax' ) );
		}

		public function build_options( $options, $input = array() ) {
			if ( empty( $options ) ) {
				return;
			}
			$boxes = $this->get_boxes();
			$content = '<div class="meta-box-sortables simple-options">';
			foreach ( $options as $section_key => $option ) {
				if ( ! isset( $option['fields'] ) ) {
					if ( isset( $option['description'] ) ) {
						$classes = array( 'postbox' );
						if ( isset( $boxes[ $section_key ] ) ) {
							$classes[] = $boxes[ $section_key ];
						}
						$content .= sprintf( '<div class="%s" id="%s">', esc_attr( implode( ' ', $classes ) ), esc_attr( $section_key ) );
						$content .= $this->box_title( $option['title'] );
						$content .= sprintf( '<div class="inside description">%s</div>', wpautop( $option['description'] ) );
						$content .= '</div>';
					}
					continue;
				}
				if ( ! is_array( $option['fields'] ) ) {
					continue;
				}
				if ( empty( $option['fields'] ) ) {
					continue;
				}
				/**
				 * extra & classes
				 */
				$classes = array( 'postbox' );
				$extra = array();
				if ( isset( $option['master'] ) ) {
					$master_fields = array(
						'section' => '',
						'field' => '',
						'value' => '',
					);
					foreach ( $master_fields as $master_field => $master_value ) {
						if ( isset( $option['master'][ $master_field ] ) ) {
							$master_value = $option['master'][ $master_field ];
						}
						$master_fields[ $master_field ] = $master_value;
						$extra[] = sprintf( 'data-master-%s="%s"', $master_field, esc_attr( $master_value ) );
					}

					$value = $this->get_single_value( $options, $input, $master_fields['section'], $master_fields['field'] );
					$classes[] = 'section-is-slave';
					if ( $master_fields['value'] != $value ) {
						$classes[] = 'hidden';
					}
				}
				if ( isset( $boxes[ $section_key ] ) ) {
					$classes[] = $boxes[ $section_key ];
				}
				/**
				 * postbox
				 */
				$classes = array_unique( $classes );
				$content .= sprintf(
					'<div class="%s" id="%s" %s>',
					esc_attr( implode( ' ', $classes ) ),
					esc_attr( $section_key ),
					implode( ' ', $extra )
				);

				$content .= $this->box_title( $option['title'] );
				/**
				 * open inside
				 */
				$content .= '<div class="inside">';
				/**
				 * add description
				 */
				if ( isset( $option['description'] ) && ! empty( $option['description'] ) ) {
					$content .= sprintf( '<p class="description">%s</p>', $option['description'] );
				}
				/**
				 * table
				 */
				$table_classes = array(
					'form-table',
				);
				$sortable = isset( $option['sortable'] ) && $option['sortable'];
				if ( $sortable ) {
					$table_classes[] = 'sortable';
				}
				$content .= sprintf(
					'<table class="%s"><tbody>',
					esc_attr( implode( ' ', $table_classes ) )
				);
				foreach ( $option['fields'] as $id => $data ) {
					/**
					 * field ID
					 */
					$html_id = 'simple_options_'.$section_key.'_'.$id;
					/**
					 * default type
					 */
					if ( ! isset( $data['type'] ) ) {
						$data['type'] = 'text';
					}
					/**
					 * default classes
					 */
					if ( ! isset( $data['classes'] ) ) {
						$data['classes'] = array();
					} else if ( ! is_array( $data['classes'] ) ) {
						$data['classes'] = array( $data['classes'] );
					}
					/**
					 * default class for text field
					 */
					if ( preg_match( '/^(text(area)?|email)$/', $data['type'] ) && empty( $data['classes'] ) ) {
						$data['classes'][] = 'large-text';
					}
					/**
					 * html5.data
					 */
					$extra = array();
					if ( isset( $data['data'] ) ) {
						foreach ( $data['data'] as $data_key => $data_value ) {
							$extra[] = sprintf( 'data-%s="%s"', esc_html( $data_key ), esc_attr( $data_value ) );
						}
					}
					/**
					 * begin table row
					 */
					if ( 'hidden' !== $data['type'] ) {
						$content .= sprintf(
							'<tr class="simple-option simple-option-%s %s">',
							esc_attr( $data['type'] ),
							isset( $data['master'] )? esc_attr( $data['master'] ):''
						);
						/**
						 * sortable
						 */
						if ( $sortable ) {
							$content .= '<td><span class="dashicons dashicons-move"></span></td>';
						}
						/**
						 * TH
						 */
						$show = true;
						if ( isset( $option['hide-th'] ) && true === $option['hide-th'] ) {
							$show = false;
						}
						if ( isset( $data['hide-th'] ) && true === $data['hide-th'] ) {
							$show = false;
						}
						if ( $show ) {
							$content .= sprintf(
								'<th scope="row"><label for="%s">%s</label></th>',
								esc_attr( $html_id ),
								isset( $data['label'] )?
								( isset( $data['label_rich'] ) && $data['label_rich'] ? $data['label'] : esc_html( $data['label'] ) ):'&nbsp;'
							);
						}
						if ( isset( $data['hide-th'] ) && true === $data['hide-th'] ) {
							$content .= '<td colspan="2">';
						} else {
							$content .= '<td>';
						}
					}

					/**
					 * field name
					 */
					$field_name = sprintf( 'simple_options[%s][%s]', $section_key, $id );
					if ( isset( $data['multiple'] ) && $data['multiple'] ) {
						$field_name .= '[]';
					}
					if ( isset( $data['name'] ) ) {
						$field_name = $data['name'];
					}
					/**
					 * value
					 */
					$value = $this->get_single_value( $options, $input, $section_key, $id );
					/**
					 * before
					 */
					if ( isset( $data['before'] ) ) {
						$content .= $data['before'];
					}
					/**
					 * produce
					 */
					switch ( $data['type'] ) {

						case 'description':
							$content .= $data['value'];
							break;

						case 'gallery':
						case 'media':
							if ( ! isset( $this->loaded['media'] ) ) {
								$this->loaded['media'] = true;
								wp_enqueue_media();
								add_action( 'admin_footer', array( $this, 'add_media_template' ) );
							}
							if ( ! is_array( $value ) ) {
								$value = array( array( 'value' => $value ) );
							}
							$content .= $this->image( $section_key, $id, $value, $data['type'] );
						break;

						case 'color':
							$content .= sprintf(
								'<input type="text" name="simple_options[%s][%s]" value="%s" class="ub_color_picker %s" id="%s" />',
								esc_attr( $section_key ),
								esc_attr( $id ),
								esc_attr( $value ),
								isset( $data['class'] ) ? esc_attr( $data['class'] ) : '',
								esc_attr( $html_id )
							);
						break;

						case 'radio':
							$content .= '<ul>';
							foreach ( $data['options'] as $radio_value => $radio_label ) {
								$content .= sprintf(
									'<li><label><input type="%s" name="simple_options[%s][%s]" %s value="%s" />%s</label></li>',
									esc_attr( $data['type'] ),
									esc_attr( $section_key ),
									esc_attr( $id ),
									checked( $value, $radio_value, false ),
									esc_attr( $radio_value ),
									esc_html( $radio_label )
								);
							}
							$content .= '</ul>';
						break;

						case 'checkboxes':
							if ( empty( $value ) || ! is_array( $value ) ) {
								$value = array();
							}
							if ( isset( $data['options'] ) && is_array( $data['options'] ) ) {
								$content .= '<ul>';
								foreach ( $data['options'] as $checkbox_value => $checkbox_label ) {
									$content .= sprintf(
										'<li><label><input type="checkbox" id="%s_%s" name="simple_options[%s][%s][%s]" value="1" class="%s" %s /> %s</label></li>',
										esc_attr( $html_id ),
										esc_attr( $checkbox_value ),
										esc_attr( $section_key ),
										esc_attr( $id ),
										esc_attr( $checkbox_value ),
										isset( $data['classes'] ) ? esc_attr( implode( ' ', $data['classes'] ) ) : '',
										checked( 1, array_key_exists( $checkbox_value, $value ), false ),
										esc_html( $checkbox_label )
									);
								}
								$content .= '</ul>';
							}
							break;

						case 'checkboxes':
							$content .= '<ul>';
							foreach ( $data['options'] as $checkbox_value => $checkbox_label ) {
								$checked = is_array( $value ) && array_key_exists( $checkbox_value, $value );
								$content .= sprintf(
									'<li><label><input type="checkbox" id="%s_%s" name="simple_options[%s][%s][%s]" value="1" class="%s" %s /> %s</label></li>',
									esc_attr( $html_id ),
									esc_attr( $checkbox_value ),
									esc_attr( $section_key ),
									esc_attr( $id ),
									esc_attr( $checkbox_value ),
									isset( $data['classes'] ) ? esc_attr( implode( ' ', $data['classes'] ) ) : '',
									checked( 1, $checked, false ),
									esc_html( $checkbox_label )
								);
							}
							$content .= '</ul>';
							break;

						case 'checkbox':
							$slave = '';
							if ( isset( $data['slave-class'] ) ) {
								$slave = sprintf( 'data-slave="%s"', esc_attr( $data['slave-class'] ) );
								if ( isset( $data['classes'] ) ) {
									$data['classes'][] = 'master-field';
								} else {
									$data['classes'] = array( 'master-field' );
								}
							}
							if ( in_array( 'switch-button', $data['classes'] ) ) {
								if ( ! isset( $this->loaded['switch-button'] ) ) {
									$this->loaded['switch-button'] = true;
									ub_enqueue_switch_button();
								}
								if ( 'on' == $value ) {
									$value = 1;
								}
								$content .= sprintf(
									'<input type="%s" id="%s" name="simple_options[%s][%s]" value="1" class="%s" data-on="%s" data-off="%s" %s %s />',
									esc_attr( $data['type'] ),
									esc_attr( $html_id ),
									esc_attr( $section_key ),
									esc_attr( $id ),
									isset( $data['classes'] ) ? esc_attr( implode( ' ', $data['classes'] ) ) : '',
									esc_attr( $data['options']['on'] ),
									esc_attr( $data['options']['off'] ),
									checked( 1, $value, false ),
									$slave
								);
							} else {
								$content .= sprintf(
									'<label><input type="%s" id="%s" name="simple_options[%s][%s]" value="1" class="%s" %s %s /> %s</label>',
									esc_attr( $data['type'] ),
									esc_attr( $html_id ),
									esc_attr( $section_key ),
									esc_attr( $id ),
									isset( $data['classes'] ) ? esc_attr( implode( ' ', $data['classes'] ) ) : '',
									checked( 1, $value, false ),
									$slave,
									esc_html( isset( $data['checkbox_label'] )? $data['checkbox_label']:'' )
								);
							}
						break;

						case 'textarea':
							if ( ! is_string( $value ) ) {
								$value = '';
							}
							$content .= sprintf(
								'<textarea id="%s" name="simple_options[%s][%s]" class="%s" id="%s">%s</textarea>',
								esc_attr( $html_id ),
								esc_attr( $section_key ),
								esc_attr( $id ),
								isset( $data['classes'] ) ? esc_attr( implode( ' ', $data['classes'] ) ) : '',
								esc_attr( $html_id ),
								esc_attr( stripslashes( $value ) )
							);
						break;

						case 'wp_editor':
							if ( ! is_string( $value ) ) {
								$value = '';
							}
							$wp_editor_id = sprintf( 'simple_options_%s_%s', $section_key, $id );
							$args = array( 'textarea_name' => $field_name, 'textarea_rows' => 9, 'teeny' => true );
							ob_start();
							wp_editor( stripslashes( $value ), $wp_editor_id, $args );
							$content .= ob_get_contents();
							ob_end_clean();
						break;

						/**
						 * select && select2
						 *
						 * @since 1.9.4
						 */
						case 'select':
						case 'select2':
							if ( isset( $data['multiple'] ) && $data['multiple'] ) {
								$extra[] = 'multiple="multiple"';
							}
							if ( 'select2' == $data['type'] ) {
								if ( ! isset( $this->loaded['select2'] ) ) {
									$this->loaded['select2'] = true;
									$version = '4.0.5';
									$file = ub_url( 'external/select2/select2.min.js' );
									wp_enqueue_script( 'select2', $file, array( 'jquery' ), $version, true );
									$file = ub_url( 'external/select2/select2.min.css' );
									wp_enqueue_style( 'select2', $file, array(), $version );
								}
							}
							$select_options = '';
							if ( isset( $data['options'] ) && is_array( $data['options'] ) ) {
								foreach ( $data['options'] as $option_value => $option_label ) {
									$selected = false;
									if ( is_array( $value ) ) {
										$selected = in_array( $option_value, $value );
									} elseif ( $value === $option_value ) {
										$selected = true;
									}
									$select_options .= sprintf(
										'<option value="%s" %s>%s</option>',
										esc_attr( $option_value ),
										selected( $selected, true, false ),
										esc_html( $option_label )
									);
								}
							}
							$content .= sprintf(
								'<select id="%s" name="%s" class="%s" %s>%s</select>',
								esc_attr( $html_id ),
								esc_attr( $field_name ),
								isset( $data['classes'] ) ? esc_attr( implode( ' ', $data['classes'] ) ) : '',
								implode( ' ', $extra ),
								$select_options
							);
						break;

							/**
							 * CSS Editor
							 *
							 * @since 1.1.0
							 */
						case 'css_editor':
							if ( ! is_string( $value ) ) {
								$value = '';
							}
							$data['classes'][] = 'hidden';
							$content .= sprintf(
								'<textarea id="%s" name="%s" class="%s">%s</textarea>',
								esc_attr( $html_id ),
								esc_attr( $field_name ),
								isset( $data['classes'] ) ? esc_attr( implode( ' ', $data['classes'] ) ) : '',
								esc_attr( stripslashes( $value ) )
							);
							$content .= sprintf(
								'<div class="ub_css_editor" id="%s_editor" data-input="#%s">%s</div>',
								esc_attr( $html_id ),
								esc_attr( $html_id ),
								esc_html( stripslashes( $value ) )
							);
						break;

						default:
							switch ( $data['type'] ) {
								case 'date':
									$data['type'] = 'text';
									$data['classes'][] = 'datepicker';
									if ( ! isset( $this->loaded['ui-datepicker'] ) ) {
										$this->loaded['ui-datepicker'] = true;
										wp_enqueue_script( 'jquery-ui-datepicker' );
										wp_localize_jquery_ui_datepicker();
										$this->enqueue_jquery_style();
									}
									if ( ! isset( $data['data'] ) ) {
										$data['data'] = array();
									}
									$alt = 'datepicker-'.md5( serialize( $data ) );
									$extra[] = sprintf( 'data-alt="%s"', esc_attr( $alt ) );
									if ( ! isset( $data['after'] ) ) {
										$data['after'] = '';
									}
									$alt_value = '';
									if ( is_array( $value ) ) {
										if ( isset( $value['alt'] ) ) {
											$alt_value = $value['alt'];
											$value = date_i18n( get_option( 'date_format' ), strtotime( $value['alt'] ) );
										} else {
											$value = '';
										}
									}
									$data['after'] .= sprintf(
										'<input type="hidden" name="%s[alt]" id="%s" value="%s" />',
										esc_attr( $field_name ),
										esc_attr( $alt ),
										esc_attr( $alt_value )
									);
									$field_name .= '[human]';
								break;

								case 'number':
									$data['classes'][] = 'small-text';
									if ( isset( $data['min'] ) ) {
										$extra[] = sprintf( 'min="%d"', $data['min'] );
									}
									if ( isset( $data['max'] ) ) {
										$extra[] = sprintf( 'max="%d"', $data['max'] );
									}
								break;

								case 'button':
								case 'submit':
									$data['classes'][] = 'button';
									if ( isset( $data['value'] ) ) {
										$value = $data['value'];
									}
									if ( isset( $data['disabled'] ) && $data['disabled'] ) {
										$extra[] = 'disabled="disabled"';
									}
								break;
							}
							$content .= sprintf(
								'<input type="%s" id="%s" name="%s" value="%s" class="%s" id="%s" %s />',
								esc_attr( $data['type'] ),
								esc_attr( $html_id ),
								esc_attr( $field_name ),
								esc_attr( stripslashes( $value ) ),
								isset( $data['classes'] ) ? esc_attr( implode( ' ', $data['classes'] ) ) : '',
								esc_attr( $html_id ),
								implode( ' ', $extra )
							);
						break;
					}
					/**
					 * after
					 */
					if ( isset( $data['after'] ) ) {
						$content .= $data['after'];
					}

					if ( in_array( 'ui-slider', $data['classes'] ) ) {
						$ui_slider_data = array(
							'data-target-id' => esc_attr( $html_id ),
						);
						foreach ( array( 'min', 'max' ) as $tmp_key ) {
							if ( isset( $data[ $tmp_key ] ) ) {
								$ui_slider_data[ 'data-'.$tmp_key ] = $data[ $tmp_key ];
							}
						}
						$ui_slider_data_string = '';
						foreach ( $ui_slider_data as $k => $v ) {
							$ui_slider_data_string .= sprintf( ' %s="%s"', $k, esc_attr( $v ) );
						}
						$content .= sprintf( '<div class="ui-slider" %s></div>', $ui_slider_data_string );
						if ( ! isset( $this->loaded['ui-slider'] ) ) {
							$this->loaded['ui-slider'] = true;
							wp_enqueue_script( 'jquery-ui-slider' );
							$this->enqueue_jquery_style();
						}
					}
					if ( isset( $data['description'] ) && ! empty( $data['description'] ) ) {
						$content .= sprintf( '<p class="description">%s</p>', $data['description'] );
					}
					if ( isset( $data['default'] ) ) {
						$show = true && ! is_array( $data['default'] );
						if ( isset( $data['default_hide'] ) && $data['default_hide'] ) {
							$show = false;
						}
						if ( $show ) {
							$default = $data['default'];
							if ( isset( $data['options'] ) && isset( $data['options'][ $default ] ) ) {
								$default = $data['options'][ $data['default'] ];
							}
							$message = sprintf(
								__( 'Default is: <code><strong>%s</strong></code>', 'ub' ),
								$default
							);
							if ( 'color' == $data['type'] ) {
								$message = sprintf(
									__( 'Default color is: <code><strong>%s</strong></code>', 'ub' ),
									$data['default']
								);
							}
							$content .= sprintf( '<p class="description description-default">%s</p>', $message );
						}
					}
					if ( 'hidden' !== $data['type'] ) {
						$content .= '</td>';
						$content .= '</tr>';
					}
				}
				$content .= '</tbody>';
				/**
				 * add reset
				 */
				$show = true;
				if ( isset( $option['hide-reset'] ) && true === $option['hide-reset'] ) {
					$show = false;
				}
				if ( $show ) {
					$content .= '<tfoot><tr><td colspan="2">';
					$content .= '<span class="simple-option-reset-section">';
					$content .= sprintf(
						'<a href="#" data-nonce="%s" data-section="%s" data-question="%s" data-network="%d">%s</a>',
						esc_attr( wp_create_nonce( 'reset-section-'.$section_key ) ),
						esc_attr( $section_key ),
						esc_attr(
							sprintf(
								__( 'Are you sure to reset "%s" section?', 'ub' ),
								$option['title']
							)
						),
						is_network_admin(),
						__( 'reset section to default', 'ub' )
					);
					$content .= '</span>';
					$content .= '</td></tr></tfoot>';
				}
				$content .= '</table></div>';
				$content .= '</div>';
			}
			$content .= '</div>';
			return $content;
		}

		/**
		 * Handle admin AJAX requests
		 *
		 * @since 1.8.5
		 */
		public function ajax() {
			/**
			 * handle closed tabs
			 */
			if ( isset( $_REQUEST['close'] ) && isset( $_REQUEST['tab'] ) && isset( $_REQUEST['nonce'] ) ) {
				if ( wp_verify_nonce( $_REQUEST['nonce'], 'boxes' ) ) {
					if ( isset( $_REQUEST['target'] ) ) {
						$user = wp_get_current_user();
						if ( empty( $user ) ) {
							wp_send_json_error();
						}
						$boxes = get_user_meta( $user->ID, 'closedpostboxes_ultimate_branding', true );
						if ( ! is_array( $boxes ) ) {
							$boxes = array();
						}
						if ( ! isset( $boxes[ $_REQUEST['tab'] ] ) ) {
							$boxes[ $_REQUEST['tab'] ] = array();
						}
						$boxes[ $_REQUEST['tab'] ][ $_REQUEST['target'] ] = 'true' == $_REQUEST['close']? 'closed':'open';
						update_user_meta( $user->ID, 'closedpostboxes_ultimate_branding', $boxes );
					}
				}
			}
			/**
			 * handle section reset
			 */
			if ( isset( $_REQUEST['section'] ) && isset( $_REQUEST['tab'] ) && isset( $_REQUEST['nonce'] ) ) {
				if ( wp_verify_nonce( $_REQUEST['nonce'], 'reset-section-'.$_REQUEST['section'] ) ) {
					$option_name = ub_get_option_name_by_module( $_REQUEST['tab'] );
					$success = false;
					if ( 'unknown' == $option_name ) {
						$success = apply_filters( 'ultimatebranding_reset_section', $success, $_REQUEST['tab'], $_REQUEST['section'] );
					} else {
						$value = ub_get_option( $option_name );
						if ( isset( $value[ $_REQUEST['section'] ] ) ) {
							unset( $value[ $_REQUEST['section'] ] );
							ub_update_option( $option_name , $value );
							$success = true;
						}
					}
					if ( $success ) {
						$admin = isset( $_REQUEST['network'] ) && $_REQUEST['network'] ? network_admin_url( 'admin.php' ):admin_url( 'admin.php' );
						$data = array(
							'redirect' => add_query_arg(
								array(
									'msg' => 'reset-section-success',
									'page' => 'branding',
									'tab' => $_REQUEST['tab'],
								),
								$admin
							),
						);
						wp_send_json_success( $data );
					}
				}
			}
			wp_send_json_error();
		}

		/**
		 * get boxes by current user and tab
		 *
		 * @since 1.8.9
		 */
		public function get_boxes() {
			$boxes = array();
			$user_id = get_current_user_id();
			$boxes = get_user_meta( $user_id, 'closedpostboxes_ultimate_branding', true );
			$tab = isset( $_REQUEST['tab'] )? $_REQUEST['tab']:'dashboard';
			if ( isset( $boxes[ $tab ] ) ) {
				$boxes = $boxes[ $tab ];
			}
			return $boxes;
		}

		/**
		 * get value of specyfic key
		 *
		 * @since 1.9.4
		 */
		private function get_single_value( $options, $input, $section, $field ) {
			$value = null;
			if ( isset( $input[ $section ] ) && isset( $input[ $section ][ $field ] ) ) {
				$value = $input[ $section ][ $field ];
			} else if (
				isset( $options[ $section ] )
				&& isset( $options[ $section ]['fields'] )
				&& isset( $options[ $section ]['fields'][ $field ] )
			) {
				if ( isset( $options[ $section ]['fields'][ $field ]['value'] ) ) {
					$value = $options[ $section ]['fields'][ $field ]['value'];
				} else if ( isset( $options[ $section ]['fields'][ $field ]['default'] ) ) {
					$value = $options[ $section ]['fields'][ $field ]['default'];
				}
			}
			/**
			 * skip value
			 */
			if (
				isset( $options[ $section ]['fields'][ $field ]['skip_value'] )
				&& $options[ $section ]['fields'][ $field ]['skip_value']
			) {
				$value = '';
			}
			return $value;
		}

		/**
		 * Enqueue custom jQuery UI css
		 */
		private function enqueue_jquery_style() {
			$key = 'ub-jquery-ui';
			if ( isset( $this->loaded[ $key ] ) ) {
				return;
			}
			wp_enqueue_style( $key, ub_url( 'assets/css/vendor/jquery-ui.min.css' ), array(), '1.12.1' );
			$this->loaded[ $key ] = true;
		}

		private function image( $section_key, $id, $images, $type ) {
			$output = array(
				'type' => $type,
				'images' => array(),
			);
			$add = empty( $images );;
			$content = '';
			foreach ( $images as $data ) {
				$image = isset( $data['value'] )? $data['value']:null;
				$image_id = $image_src = $disabled = '';
				if ( empty( $image ) ) {
					$image_id = 'time-'.time();
					$disabled = 'disabled';
					$add = false;
				} else if ( preg_match( '/^\d+$/', $image ) ) {
					$image_id = 'attachment-id-'.$image;
					$image_src = wp_get_attachment_image_url( $image );
					$add = true;
				} else if ( is_string( $image ) ) {
					$image_src = $image;
					$image_id = 'file-'.md5( $image );
					$add = true;
				}
				$output['images'][] = array(
					'id' => $id,
					'image_id' => $image_id,
					'section_key' => $section_key,
					'value' => $image,
					'image_src' => $image_src,
					'disabled' => $disabled,
				);
			}
			if ( $add && 'gallery' === $type ) {
				$output['images'][] = array(
					'id' => $id,
					'section_key' => $section_key,
					'disabled' => 'disabled',
				);
			}
			$content .= '<script type="text/javascript">';
			$content .= sprintf( '_ub_option_media_%s_%s', sanitize_title( $section_key ), sanitize_title( $id ) );
			$content .= '=';
			$content .= json_encode( $output );
			$content .= ';</script>';
			$content .= sprintf( '<div class="images" id="ub_option_media_%s_%s"></div>', esc_attr( $section_key ), esc_attr( $id ) );

			return $content;
		}

		public function add_media_template() {
?>
<script type="text/html" id="tmpl-simple-options-media">
    <div class="image-wrapper" data-id="{{{data.id}}}" data-section_key="{{{data.section_key}}}">
        <div class="image-preview-wrapper"><img class="image-preview" src="{{{data.image_src}}}" /></div>
        <a href="#" class="image-reset {{{data.disabled}}}"><?php esc_html_e( 'Remove', 'ub' ); ?></a>
        <input type="button" class="button button-select-image" value="<?php esc_attr_e( 'Browse', 'ub' ); ?>" />
        <input type="hidden" name="simple_options[{{{data.section_key}}}][{{{data.id}}}][]" value="{{{data.value}}}" class="attachment-id" />
    </div>
</script>
<?php
		}

		/**
		 * box title
		 *
		 * @since 2.1.0
		 */
		public function box_title( $title, $after = '' ) {
			$content = '';
			/**
			 * fold
			 */
			$content .= '<button type="button" class="handlediv button-link" aria-expanded="true">';
			$content .= '<span class="screen-reader-text">' . sprintf( __( 'Toggle panel: %s', 'ub' ), esc_html( $title ) ) . '</span>';
			$content .= '<span class="toggle-indicator" aria-hidden="true"></span>';
			$content .= '</button>';
			/**
			 * Section title
			 */
			$content .= sprintf( ' <h2 class="hndle">%s%s</h2>', $title, $after );
			return $content;
		}
	}
}