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Editing: cmb2-field-icon.php

<?php

/*
Plugin Name: CMB2 Field Type: Icon
Plugin URI: https://wordpress.org/plugins/commons-booking
GitHub Plugin URI: https://wordpress.org/plugins/commons-booking
Description: Icon field type for CMB2.
Version: 0.1.3
Author: Annesley Newholm
License: MIT
*/
require_once( ABSPATH . 'wp-admin/includes/plugin.php' );

// Note that commons booking 1 plugin CMB2_Field_Icon version
// did not check multiple instance creation properly
if ( ! is_plugin_active( 'commons-booking/commons-booking.php' ) ) {

if ( ! defined( 'CMB2_ICON_FIELD_NAME' ) ) define('CMB2_ICON_FIELD_NAME', 'icon');

if ( ! class_exists( 'CMB2_Field_Icon' ) ) {
		class CMB2_Field_Icon {

/**
				* @var string Version
				*/
				const VERSION = '0.1.0';

static $constructed = FALSE;

/**
				* CMB2_Field_Icon constructor.
				*/
				public function __construct() {
						if ( ! self::$constructed ) {
							add_filter( 'cmb2_render_icon',   [ $this, 'render_icon_selector' ], 10, 5 );
							add_filter( 'cmb2_sanitize_icon', [ $this, 'sanitize_icon' ], 10, 4 );
							self::$constructed = TRUE;
						}
				}

/**
				* Render the field
				*
				* @param $field
				* @param $field_escaped_value
				* @param $object_id
				* @param $object_type
				* @param $field_type_object
				*/
				public function render_icon_selector(
						CMB2_Field $field,
						$field_escaped_value,
						$object_id,
						$object_type,
						CMB2_Types $field_type_object
				) {

$this->enqueue_scripts();

if ( version_compare( CMB2_VERSION, '2.2.2', '>=' ) ) {
								$field_type_object->type = new CMB2_Type_Text( $field_type_object );
						}

// Icons from dir
						$attributes           = $field->args( 'options' );
						if ( isset( $attributes['paths'] ) ) {
							$plugin_icons_dirs    = $attributes['paths'];
							$field_value          = ( isset( $field_escaped_value[CMB2_ICON_FIELD_NAME] ) ? $field_escaped_value[CMB2_ICON_FIELD_NAME] : '' );
							$id_base              = "{$field->args( 'id' )}_{CMB2_ICON_FIELD_NAME}";
							echo("<ul class='icon-scroll'>");
							foreach ( $plugin_icons_dirs as $plugin_icons_dir ) {
								if ( preg_match( '/^https?:\/\//', $plugin_icons_dir ) ) {
									// Webpage
									$this->render_icon_selector_webpage_contents( $plugin_icons_dir, $field, $field_value, $id_base, $field_type_object );
								} else {
									// Normal filesystem directory
									$this->render_icon_selector_directory( $plugin_icons_dir, $field, $field_value, $id_base, $field_type_object );
								}
							}
							echo("</ul>");
						} else echo( __('No options->paths to images area set') );

// Custom icon
						echo('<ul class"icon-other"><li class="custom_icon"><label>Custom:</label> ');
						$this->render_input( CMB2_ICON_FIELD_NAME, $field, $field_escaped_value, $field_type_object );
						echo('</li></ul>');

$field_type_object->_desc( true, true );

}

/**
				* Render the webpage contents recursively
				*
				* @param $url
				* @param $field
				* @param $field_value
				* @param $id_base
				* @param $field_type_object
				*/
				public function render_icon_selector_webpage_contents( $url, $field, $field_value, $id_base, $field_type_object ) {
					$response = wp_remote_get( $url );
					if( ! is_wp_error( $response ) && is_array( $response ) ) {
						$code = wp_remote_retrieve_response_code( $response );
						$type = wp_remote_retrieve_header( $response, 'content-type' );
						if ( $code == '200' && strstr( $type, 'text' ) ) {
							preg_match_all( '/ (href|src)=["|\']([^"\']+)/', wp_remote_retrieve_body( $response ), $links );
							if ( is_array( $links ) && count( $links ) > 2 ) {
								foreach ( $links[2] as $file_path_url ) {
									if ( preg_match( '/\.(png|jpg|ico|jpeg|bmp)/', $file_path_url ) ) {
										$checked       = ( $file_path_url == $field_value );
										$selected      = ( $checked ? 'selected' : '' );

echo("<li class='$selected'>");
										$id = $this->render_input_radio( CMB2_ICON_FIELD_NAME, $field, $file_path_url, $field_value, $field_type_object );
										echo("<label for='$id'><img src='$file_path_url'></label>");
										echo('</li>');
									}
								}
							}
						}
					}
				}

/**
				* Render the directory recursively
				*
				* @param $plugin_icons_dir
				* @param $field
				* @param $field_value
				* @param $id_base
				* @param $field_type_object
				*/
				public function render_icon_selector_directory( $plugin_icons_dir, $field, $field_value, $id_base, $field_type_object ) {
					// SECURITY: we are accessing the filesystem here and pulicly outputting results...
					$wordpress_dir        = get_home_path();
					$plugin_icons_dir_url = '/' . str_replace( get_home_path(), '', $plugin_icons_dir );

if ( substr( $plugin_icons_dir, 0, strlen($wordpress_dir) ) == $wordpress_dir ) {
						if ( file_exists( $plugin_icons_dir ) && is_dir( $plugin_icons_dir ) ) {
							foreach( scandir($plugin_icons_dir) as $filename ) {
								$full_path = "$plugin_icons_dir/$filename";
								if ( is_dir( $full_path ) ) {
									if ( ! ( $filename == '.' || $filename == '..' ) ) {
										$this->render_icon_selector_directory( $full_path, $field, $field_value, $id_base, $field_type_object );
									}
								} else {
									if ( ! strstr( $filename , '-shadow.' ) ) {
										$file_path_url = "$plugin_icons_dir_url/$filename";
										$checked       = ( $file_path_url == $field_value );
										$selected      = ( $checked ? 'selected' : '' );

// TODO: we were setting the correct label id here to allow HTML to check the input. doesn't work though
										// for='$id'
										// Probably because the id text content is complex...
										echo("<li class='$selected'>");
										$id = $this->render_input_radio( CMB2_ICON_FIELD_NAME, $field, $file_path_url, $field_value, $field_type_object );
										echo("<label for='$id'><img src='$file_path_url'></label>");
										echo('</li>');
									}
								}
							}
						} else {
							// Do nothing because maybe the directory has not been created yet, e.g. a media folder
							// echo( __('directory does not exist') );
							// echo( "[$plugin_icons_dir]" );
						}
					} else {
						echo( __('options->paths must be within the WordPress fielsystem somewhere') );
						echo( "[$plugin_icons_dir]" );
					}
				}

/**
				* Sanitize values
				*/
				public function sanitize_icon( $override_value, $value, $object_id, $field_args ) {
						// Add in the full URL and final filename selection for conveinience
						if ( isset( $value['icon'] ) && $value['icon'] ) {
							$icon_url = $value['icon'];

// Make the URL relative if it points to this domain
							$home_url = get_home_url(); // http://example.com
							if ( substr( $icon_url, 0, strlen($home_url) ) == $home_url ) {
								$icon_url = substr( $icon_url, strlen($home_url) );
							}

// If we have a relative URL then check for a shadow
							if ( $icon_url[0] == '/') {
								$wordpress_dir = get_home_path();
								$icon_path     = "$wordpress_dir/$icon_url";

// Auto-detect shadow
								$shadow_path = preg_replace( '/\.([a-zA-Z0-9]+)$/', '-shadow.$1', $icon_path );
								if ( file_exists( $shadow_path ) ) {
									$shadow_url = preg_replace( '/\.([a-zA-Z0-9]+)$/', '-shadow.$1', $icon_url );
									$value['icon_shadow'] = $shadow_url;
								}
							}
						}
						return $value;
				}

/**
				* Enqueue scripts and styles
				*/
				public function enqueue_scripts() {
						wp_enqueue_script( 'cmb2-icon-main', plugins_url( 'assets/js/main.js',    __FILE__ ), NULL, self::VERSION );
						wp_enqueue_style(  'cmb2-icon-main', plugins_url( 'assets/css/style.css', __FILE__ ), NULL, self::VERSION );
				}

/**
				* @param string     $field_name
				* @param CMB2_Field $field
				* @param            $field_escaped_value
				* @param CMB2_Types $field_type_object
				*
				* @internal param array $args
				*/
				protected function render_input_radio( $field_name = '', CMB2_Field $field, $field_this_value, $field_escaped_value, CMB2_Types $field_type_object ) {
						$value_id = 'icon_' . preg_replace( '/[^a-zA-Z0-9]+/', '-', $field_this_value );
						$id       = "{$field->args( 'id' )}_{$field_name}_{$value_id}";
						$checked  = ( isset( $field_escaped_value[$field_name] ) && $field_this_value == $field_escaped_value[$field_name] );
						$attrs    = $field_type_object->concat_attrs( [
								'id'    => $id,
								'type'  => 'radio',
								'name'  => "{$field->args( '_name' )}[{$field_name}]",
								'value' => $field_this_value,
								'checked' => $checked,
								'class' => "icon__{$field_name}",
								'desc'  => ''
						], [ 'attributes' ] );

echo sprintf( '<input%s />', $attrs );

return $id;
				}

/**
				* @param string     $field_name
				* @param CMB2_Field $field
				* @param            $field_escaped_value
				* @param CMB2_Types $field_type_object
				*
				* @internal param array $args
				*/
				protected function render_input( $field_name = '', CMB2_Field $field, $field_escaped_value, CMB2_Types $field_type_object, $field_type = 'text' ) {
						$id    = "{$field->args( 'id' )}_{$field_name}";
						$attrs = $field_type_object->concat_attrs( [
								'id'    => $id,
								'type'  => $field_type,
								'name'  => "{$field->args( '_name' )}[{$field_name}]",
								'value' => isset( $field_escaped_value[ $field_name ] ) ? $field_escaped_value[ $field_name ] : '',
								'class' => "icon__{$field_name}",
								'desc'  => ''
						], [ 'attributes' ] );

echo sprintf( '<input%s />', $attrs );

return $id;
				}
		}
	}

new CMB2_Field_Icon();
}

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Editing: cmb2-field-icon.php

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