<?php

use Pods\Whatsit\Field;
use Pods\Whatsit\Pod;

/**
 * @package Pods\Fields
 */
class PodsField_File extends PodsField {

	/**
	 * {@inheritdoc}
	 */
	public static $group = 'Relationships / Media';

	/**
	 * {@inheritdoc}
	 */
	public static $type = 'file';

	/**
	 * {@inheritdoc}
	 */
	public static $label = 'File / Image / Video';

	/**
	 * {@inheritdoc}
	 */
	protected static $api = false;

	/**
	 * Temporary upload directory.
	 * @var string
	 */
	private static $tmp_upload_dir;

	/**
	 * {@inheritdoc}
	 */
	public function setup() {

		static::$group = __( 'Relationships / Media', 'pods' );
		static::$label = __( 'File / Image / Video', 'pods' );

	}

	/**
	 * {@inheritdoc}
	 */
	public function admin_init() {

		// Hook into AJAX for Uploads.
		add_action( 'wp_ajax_pods_upload', array( $this, 'admin_ajax_upload' ) );
		add_action( 'wp_ajax_nopriv_pods_upload', array( $this, 'admin_ajax_upload' ) );

	}

	/**
	 * {@inheritdoc}
	 */
	public function options() {

		$sizes = get_intermediate_image_sizes();

		$image_sizes = array();

		foreach ( $sizes as $size ) {
			$image_sizes[ $size ] = ucwords( str_replace( '-', ' ', $size ) );
		}

		$type = static::$type;

		$options = array(
			static::$type . '_format_type'            => array(
				'label'      => __( 'Upload Limit', 'pods' ),
				'default'    => 'single',
				'required'   => true,
				'type'       => 'pick',
				'data'       => array(
					'single' => __( 'Single File', 'pods' ),
					'multi'  => __( 'Multiple Files', 'pods' ),
				),
				'pick_format_single' => 'dropdown',
				'pick_show_select_text' => 0,
				'dependency' => true,
			),
			static::$type . '_uploader'               => array(
				'label'      => __( 'File Uploader', 'pods' ),
				'default'    => 'attachment',
				'required'   => true,
				'type'       => 'pick',
				'data'       => apply_filters(
					"pods_form_ui_field_{$type}_uploader_options",
					array(
						'attachment' => __( 'Upload and/or Select (Media Library)', 'pods' ),
						'plupload'   => __( 'Upload only (Plupload)', 'pods' ),
					)
				),
				'pick_format_single' => 'dropdown',
				'pick_show_select_text' => 0,
				'dependency' => true,
			),
			static::$type . '_type'                   => array(
				'label'      => __( 'Restrict File Types', 'pods' ),
				'default'    => apply_filters( "pods_form_ui_field_{$type}_type_default", 'images' ),
				'type'       => 'pick',
				'data'       => apply_filters(
					"pods_form_ui_field_{$type}_type_options",
					[
						'Images' => [
							'images'     => __( 'Images (ONLY jpg, jpeg, png, gif, and webp)', 'pods' ),
							'images-any' => __( 'Images - Any (jpg, jpeg, png, gif, webp, and others supported by WP)', 'pods' ),
						],
						'Video' => [
							'video'      => __( 'Video (ONLY mpg, mov, flv, and mp4)', 'pods' ),
							'video-any'  => __( 'Video - Any (mpg, mov, flv, mp4, and others supported by WP)', 'pods' ),
						],
						'Audio' => [
							'audio'      => __( 'Audio (ONLY mp3, m4a, wav, and wma)', 'pods' ),
							'audio-any'  => __( 'Audio - Any (mp3, m4a, wav, wma, and others supported by WP)', 'pods' ),
						],
						'Text' => [
							'text'       => __( 'Text (txt, csv, tsv, rtx)', 'pods' ),
						],
						'More Options' => [
							'any'        => __( 'Any Type (no restriction)', 'pods' ),
							'other'      => __( 'Other (customize allowed extensions)', 'pods' ),
						],
					]
				),
				'pick_format_single' => 'dropdown',
				'pick_show_select_text' => 0,
				'dependency' => true,
			),
			static::$type . '_allowed_extensions'     => array(
				'label'       => __( 'Allowed File Extensions', 'pods' ),
				'description' => __( 'Separate file extensions with a comma (ex. jpg,png,mp4,mov). This only applies to the file uploader, media library selection will continue to fallback to the mime type group like Images, Video, etc.', 'pods' ),
				'depends-on'  => array( static::$type . '_type' => 'other' ),
				'default'     => apply_filters( "pods_form_ui_field_{$type}_extensions_default", '' ),
				'text_placeholder' => 'jpg,png,mp4,mov',
				'type'        => 'text',
			),
			static::$type . '_attachment_tab'         => array(
				'label'      => __( 'Media Library Default Tab', 'pods' ),
				'depends-on' => array( static::$type . '_uploader' => 'attachment' ),
				'default'    => 'upload',
				'required'   => true,
				'type'       => 'pick',
				'data'       => array(
					// These keys must match WP media modal router names.
					'upload' => __( 'Upload File', 'pods' ),
					'browse' => __( 'Media Library', 'pods' ),
				),
				'pick_format_single' => 'dropdown',
				'pick_show_select_text' => 0,
			),
			static::$type . '_attachment_current_post_only'         => array(
				'label'      => __( 'Restrict Media Library to Current Post ID', 'pods' ),
				'help'       => __( 'The media library will be restricted to only showing attachments that are attached to the current post ID if this field is on a Pod that is a Post Type.', 'pods' ),
				'depends-on' => array( static::$type . '_uploader' => 'attachment' ),
				'default'    => 0,
				'type'       => 'boolean',
			),
			static::$type . '_upload_dir'             => array(
				'label'      => __( 'Upload Directory', 'pods' ),
				'default'    => 'wp',
				'type'       => 'pick',
				'required'   => true,
				'data'       => array(
					'wp'      => __( 'WordPress Default', 'pods' ) . ' (/wp-content/uploads/yyyy/mm/)',
					'uploads' => __( 'Custom directory within the default uploads directory', 'pods' ),
				),
				'pick_format_single' => 'dropdown',
				'pick_show_select_text' => 0,
				'depends-on' => array( static::$type . '_uploader' => 'plupload' ),
				'dependency' => true,
			),
			static::$type . '_upload_dir_custom'     => array(
				'label'       => __( 'Custom Upload Directory', 'pods' ),
				'help'        => __( 'Magic tags are allowed for this field. The path is relative to the /wp-content/uploads/ folder on your site.', 'pods' ),
				'placeholder' => 'my-custom-folder',
				'required'    => true,
				'depends-on'  => array(
					static::$type . '_uploader'   => 'plupload',
					static::$type . '_upload_dir' => 'uploads',
				),
				/**
				 * Allow filtering the custom upload directory used.
				 *
				 * @since 2.7.28
				 *
				 * @param string $default_directory The custom upload directory to use by default for new fields.
				 */
				'default'     => apply_filters( "pods_form_ui_field_{$type}_upload_dir_custom", '' ),
				'type'        => 'text',
			),
			static::$type . '_edit_title'             => array(
				'label'   => __( 'Editable Title', 'pods' ),
				'default' => 1,
				'type'    => 'boolean',
			),
			static::$type . '_show_edit_link'         => array(
				'label'   => __( 'Show Edit Link', 'pods' ),
				'default' => 0,
				'type'    => 'boolean',
			),
			static::$type . '_linked'                 => array(
				'label'   => __( 'Show Download Link', 'pods' ),
				'default' => 0,
				'type'    => 'boolean',
			),
			static::$type . '_limit'                  => array(
				'label'      => __( 'Max Number of Files', 'pods' ),
				'depends-on' => array( static::$type . '_format_type' => 'multi' ),
				'default'    => 0,
				'type'       => 'number',
			),
			static::$type . '_restrict_filesize'      => array(
				'label'      => __( 'Restrict File Size', 'pods' ),
				'help'       => __( 'Valid size suffixes are: GB (gigabytes), MB (megabytes), KB (kilobytes), or B (bytes).  Defaults to the <a href="https://developer.wordpress.org/reference/functions/wp_max_upload_size/">wp_max_upload_size</a> setting.', 'pods' ),
				'depends-on' => array( static::$type . '_uploader' => 'plupload' ),
				'default'    => '',
				'text_placeholder' => '10MB',
				'type'       => 'text',
			),
			static::$type . '_field_template'         => array(
				'label'      => __( 'List Style', 'pods' ),
				'help'       => __( 'You can choose which style you would like the files to appear within the form.', 'pods' ),
				'depends-on' => array(
					static::$type . '_type' => [
						'images',
						'images-any',
					]
				),
				'default'    => apply_filters( "pods_form_ui_field_{$type}_template_default", 'rows' ),
				'type'       => 'pick',
				'data'       => apply_filters(
					"pods_form_ui_field_{$type}_type_templates",
					array(
						'rows'  => __( 'Rows', 'pods' ),
						'tiles' => __( 'Tiles', 'pods' ),
					)
				),
				'pick_format_single' => 'dropdown',
				'pick_show_select_text' => 0,
			),
			static::$type . '_add_button'             => array(
				'label'   => __( 'Add Button Text', 'pods' ),
				'default' => __( 'Add File', 'pods' ),
				'type'    => 'text',
			),
			static::$type . '_modal_title'            => array(
				'label'      => __( 'Modal Title', 'pods' ),
				'depends-on' => array( static::$type . '_uploader' => 'attachment' ),
				'default'    => __( 'Attach a file', 'pods' ),
				'type'       => 'text',
			),
			static::$type . '_modal_add_button'       => array(
				'label'      => __( 'Modal Add Button Text', 'pods' ),
				'depends-on' => array( static::$type . '_uploader' => 'attachment' ),
				'default'    => __( 'Add File', 'pods' ),
				'type'       => 'text',
			),

			/* WP GALLERY OUTPUT */
			static::$type . '_wp_gallery_output'      => array(
				'label'      => __( 'Output as a WP Gallery', 'pods' ),
				'help'       => sprintf( __( '<a href="%s" target="_blank" rel="noopener noreferrer">Click here for more info</a>', 'pods' ), 'https://wordpress.org/support/article/inserting-images-into-posts-and-pages/' ),
				'depends-on' => [
					static::$type . '_type' => [
						'images',
						'images-any',
					]
				],
				'dependency' => true,
				'type'       => 'boolean',
			),
			static::$type . '_wp_gallery_link'        => array(
				'label'      => __( 'Gallery Image Links', 'pods' ),
				'depends-on' => array( static::$type . '_wp_gallery_output' => true ),
				'type'       => 'pick',
				'default'    => 'file',
				'data'       => array(
					'post' => __( 'Attachment Page', 'pods' ),
					'file' => __( 'Media File', 'pods' ),
					'none' => __( 'None', 'pods' ),
				),
				'pick_format_single' => 'dropdown',
				'pick_show_select_text' => 0,
			),
			static::$type . '_wp_gallery_columns'     => array(
				'label'      => __( 'Gallery Image Columns', 'pods' ),
				'depends-on' => array( static::$type . '_wp_gallery_output' => true ),
				'type'       => 'pick',
				'default'    => '3',
				'data'       => array(
					'1' => '1',
					'2' => '2',
					'3' => '3',
					'4' => '4',
					'5' => '5',
					'6' => '6',
					'7' => '7',
					'8' => '8',
					'9' => '9',
				),
				'pick_format_single' => 'dropdown',
				'pick_show_select_text' => 0,
			),
			static::$type . '_wp_gallery_random_sort' => array(
				'label'      => __( 'Gallery Randomized Order', 'pods' ),
				'depends-on' => array( static::$type . '_wp_gallery_output' => true ),
				'type'       => 'boolean',
			),
			static::$type . '_wp_gallery_size'        => array(
				'label'      => __( 'Gallery Image Size', 'pods' ),
				'depends-on' => array( static::$type . '_wp_gallery_output' => true ),
				'type'       => 'pick',
				'default'    => 'thumbnail',
				'data'       => $this->data_image_sizes(),
				'pick_format_single' => 'dropdown',
				'pick_show_select_text' => 0,
			),
			static::$type . '_auto_set_featured_image' => array(
				'label'      => __( 'Automatically set first image as Featured Image for the Current Post', 'pods' ),
				'help'       => __( 'On save, the first image of this field will update the featured image for the current post if this field is on a Pod that is a Post Type.', 'pods' ),
				'default'    => 0,
				'type'       => 'boolean',
			),
		);

		return $options;

	}

	/**
	 * {@inheritdoc}
	 */
	public function prepare( $options = null ) {
		$format = static::$prepare;

		// Maybe use number format for storage if limit is one.
		if ( $options instanceof Field && 1 === $options->get_limit() ) {
			$format = '%d';
		}

		return $format;
	}

	/**
	 * {@inheritdoc}
	 */
	public function schema( $options = null ) {
		return false;
	}

	/**
	 * {@inheritdoc}
	 */
	public function display( $value = null, $name = null, $options = null, $pod = null, $id = null ) {

		if ( ! empty( $options[ static::$type . '_wp_gallery_output' ] ) ) {
			return $this->do_wp_gallery( $value, $options );
		}

		if ( is_array( $value ) && ! empty( $value ) ) {
			if ( isset( $value['ID'] ) ) {
				$value = wp_get_attachment_url( $value['ID'] );
			} else {
				$attachments = $value;
				$value       = array();

				foreach ( $attachments as $v ) {
					if ( ! is_array( $v ) ) {
						$value[] = $v;
					} elseif ( isset( $v['ID'] ) ) {
						$value[] = wp_get_attachment_url( $v['ID'] );
					}
				}

				$value = implode( ' ', $value );
			}
		}

		return $value;

	}

	/**
	 * {@inheritdoc}
	 */
	public function input( $name, $value = null, $options = null, $pod = null, $id = null ) {
		$options = ( is_array( $options ) || is_object( $options ) ) ? $options : (array) $options;

		$type = pods_v( 'type', $options, static::$type );

		$args = compact( array_keys( get_defined_vars() ) );
		$args = (object) $args;

		$pod_data = null;

		if ( $pod instanceof Pods ) {
			$pod_data = $pod->pod_data;
		} elseif ( $pod instanceof Pod ) {
			$pod_data = $pod;
		} elseif ( is_array( $pod ) ) {
			$pod_data = $pod;
		}

		// Get pod type.
		$pod_type = $pod_data ? $pod_data['type'] : null;

		$args->options['file_post_id'] = null;

		// Maybe set post_id based on current post context.
		if ( 'post_type' === $pod_type && ! empty( $options[ static::$type . '_attachment_current_post_only' ] ) ) {
			$args->options['file_post_id'] = $id;
		}

		/**
		 * Access Checking
		 */
		$is_user_logged_in = is_user_logged_in();

		$file_upload_requirements = array(
			'disabled'          => ( defined( 'PODS_DISABLE_FILE_UPLOAD' ) && true === PODS_DISABLE_FILE_UPLOAD ),
			'require_login'     => ( defined( 'PODS_UPLOAD_REQUIRE_LOGIN' ) && true === PODS_UPLOAD_REQUIRE_LOGIN && ! $is_user_logged_in ),
			'require_login_cap' => ( defined( 'PODS_UPLOAD_REQUIRE_LOGIN' ) && is_string( PODS_UPLOAD_REQUIRE_LOGIN ) && ( ! $is_user_logged_in || ! current_user_can( PODS_UPLOAD_REQUIRE_LOGIN ) ) ),
		);

		$file_browser_requirements = array(
			'disabled'          => ( defined( 'PODS_DISABLE_FILE_BROWSER' ) && true === PODS_DISABLE_FILE_BROWSER ),
			'require_login'     => ( defined( 'PODS_FILES_REQUIRE_LOGIN' ) && true === PODS_FILES_REQUIRE_LOGIN && ! $is_user_logged_in ),
			'require_login_cap' => ( defined( 'PODS_FILES_REQUIRE_LOGIN' ) && is_string( PODS_FILES_REQUIRE_LOGIN ) && ( ! $is_user_logged_in || ! current_user_can( PODS_FILES_REQUIRE_LOGIN ) ) ),
		);

		$file_upload_requirements  = array_filter( $file_upload_requirements );
		$file_browser_requirements = array_filter( $file_browser_requirements );

		if ( ! empty( $file_upload_requirements ) && ! empty( $file_browser_requirements ) ) {
			?>
			<p><?php esc_html_e( 'You do not have access to upload / browse files. Contact your website admin to resolve.', 'pods' ); ?></p>
			<?php

			return;
		}

		wp_enqueue_media();

		wp_enqueue_script( 'pods-i18n' );

		// To be further refactored later when we remove jQuery dependency and this field is fully React.
		wp_enqueue_script( 'jquery' );
		wp_enqueue_script( 'jquery-ui-core' );
		wp_enqueue_script( 'jquery-ui-sortable' );

		// Ensure the media library is initialized
		$this->render_input_script( $args );
	}

	/**
	 * {@inheritdoc}
	 */
	public function build_dfv_field_options( $options, $args ) {
		if ( ! is_admin() ) {
			include_once ABSPATH . '/wp-admin/includes/template.php';

			if ( is_multisite() ) {
				include_once ABSPATH . '/wp-admin/includes/ms.php';
			}
		}

		// Enforce defaults.
		$all_options = static::options();

		foreach ( $all_options as $option_name => $option ) {
			$default = pods_v( 'default', $option, '' );

			$options[ $option_name ] = pods_v( $option_name, $options, $default );

			if ( '' === $options[ $option_name ] ) {
				$options[ $option_name ] = $default;
			}
		}

		// Handle default template setting.
		$file_field_template = pods_v( $args->type . '_field_template', $options );

		// Get which file types the field is limited to.
		$limit_file_type = pods_v( $args->type . '_type', $options );

		$options[ $args->type . '_type' ] = $limit_file_type;

		// Non-image file types are forced to rows template right now.
		if ( ! in_array( $limit_file_type, [ 'images', 'images-any' ], true ) ) {
			$file_field_template = 'rows';
		}

		$options[ $args->type . '_field_template' ] = $file_field_template;

		// Enforce limit.
		$file_limit = 1;

		$format_type = pods_v( $args->type . '_format_type', $options, 'single', true );

		if ( 'single' === $format_type ) {
			if ( ! empty( $args->value ) && is_array( $args->value ) ) {
				$args->value = reset( $args->value );
			}
		} elseif ( 'multi' === $format_type ) {
			$file_limit = (int) pods_v( $args->type . '_limit', $options, 0 );

			if ( $file_limit < 0 ) {
				$file_limit = 0;
			}
		}

		$options[ $args->type . '_limit' ] = $file_limit;

		$file_mime_types = $this->get_file_mime_types_for_field( $options );

		if ( null === $file_mime_types ) {
			$limit_types      = '';
			$limit_extensions = '*';
		} else {
			$limit_types      = implode( ',', $file_mime_types['mime_types'] );
			$limit_extensions = implode( ',', $file_mime_types['extensions'] );
		}

		$options['limit_types']      = $limit_types;
		$options['limit_extensions'] = $limit_extensions;

		$is_user_logged_in = is_user_logged_in();

		// @todo: plupload specific options need accommodation
		if ( 'plupload' === pods_v( static::$type . '_uploader', $options ) ) {
			wp_enqueue_script( 'plupload-all' );

			if ( is_array( $args->pod ) ) {
				$pod_name = $args->pod['name'];
			} elseif ( $args->pod instanceof Pods ) {
				$pod_name = $args->pod->pod;
			} elseif ( $args->pod instanceof Pod ) {
				$pod_name = $args->pod->get_name();
			} else {
				$pod_name = '';
			}

			if ( is_array( $options ) ) {
				$field_name = pods_v( 'name', $options );
			} elseif ( $options instanceof Field ) {
				$field_name = $options->get_name();
			} else {
				$field_name = '';
			}

			$id = (int) $args->id;

			if ( is_user_logged_in() ) {
				$uid = 'user_' . get_current_user_id();
			} else {
				$uid = pods_session_id();
			}

			$uri_hash = wp_create_nonce( 'pods_uri_' . $_SERVER['REQUEST_URI'] );

			$nonce_name  = 'pods_upload:' . json_encode( compact( 'pod_name', 'field_name', 'uid', 'uri_hash', 'id' ) );
			$field_nonce = wp_create_nonce( $nonce_name );

			$plupload_init = [
				'runtimes'            => 'html5,silverlight,flash,html4',
				'url'                 => admin_url( 'admin-ajax.php?pods_ajax=1', 'relative' ),
				'file_data_name'      => 'Filedata',
				'multiple_queues'     => false,
				'max_file_size'       => wp_max_upload_size() . 'b',
				'flash_swf_url'       => includes_url( 'js/plupload/plupload.flash.swf' ),
				'silverlight_xap_url' => includes_url( 'js/plupload/plupload.silverlight.xap' ),
				'filters'             => [
					[
						'title'      => __( 'Allowed Files', 'pods' ),
						'extensions' => $limit_extensions,
					],
				],
				'multipart'           => true,
				'urlstream_upload'    => true,
				'multipart_params'    => [
					'action'     => 'pods_upload',
					'method'     => 'upload',
					'pod_name'   => $pod_name,
					'field_name' => $field_name,
					'id'         => $id,
					'uri_hash'   => $uri_hash,
					'_wpnonce'   => $field_nonce,
				],
			];

			// Disable multi selection if only one is allowed.
			if ( 1 === $file_limit ) {
				$plupload_init['multi_selection'] = false;
			}

			// Backwards compatibility: Pass post ID if we're in an add or edit post screen.
			$post = get_post();
			if ( $post instanceof WP_Post ) {
				$plupload_init['multipart_params']['post_id'] = $post->ID;
			}

			$options['plupload_init'] = $plupload_init;
		}//end if

		return $options;

	}

	/**
	 * {@inheritdoc}
	 */
	public function build_dfv_field_attributes( $attributes, $args ) {

		// Add template class.
		$attributes['class'] .= ' pods-field-template-' . $args->options[ $args->type . '_field_template' ];

		return $attributes;

	}

	/**
	 * {@inheritdoc}
	 */
	public function build_dfv_field_item_data( $args ) {

		$data = array();

		$title_editable = (int) pods_v( $args->type . '_edit_title', $args->options, 0 );

		$value = $args->value;

		if ( empty( $value ) ) {
			$value = array();
		} else {
			$value = (array) $value;
		}

		foreach ( $value as $id ) {
			$attachment = get_post( $id );

			if ( empty( $attachment ) ) {
				continue;
			}

			$icon = '';

			// @todo Add access check
			$edit_link = get_edit_post_link( $attachment->ID, 'raw' );

			$link     = get_permalink( $attachment->ID );
			$download = wp_get_attachment_url( $attachment->ID );

			$thumb = wp_get_attachment_image_src( $id, 'thumbnail', true );

			if ( ! empty( $thumb[0] ) ) {
				$icon = $thumb[0];
			}

			$title = $attachment->post_title;

			if ( 0 === $title_editable ) {
				$title = basename( $attachment->guid );
			}

			$data[] = array(
				'id'        => esc_html( $id ),
				'icon'      => esc_attr( $icon ),
				'name'      => wp_strip_all_tags( html_entity_decode( $title ) ),
				'edit_link' => html_entity_decode( esc_url( $edit_link ) ),
				'link'      => html_entity_decode( esc_url( $link ) ),
				'download'  => html_entity_decode( esc_url( $download ) ),
				'selected'  => true,
			);
		}//end foreach

		return $data;

	}

	/**
	 * {@inheritdoc}
	 */
	public function validate( $value, $name = null, $options = null, $fields = null, $pod = null, $id = null, $params = null ) {

		// @todo Check file size
		// @todo Check file extensions
		return parent::validate( $value, $name, $options, $fields, $pod, $id, $params );

	}

	/**
	 * {@inheritdoc}
	 */
	public function save( $value, $id = null, $name = null, $options = null, $fields = null, $pod = null, $params = null ) {

		if ( empty( self::$api ) ) {
			self::$api = pods_api();
		}

		if ( null === $value ) {
			$value = [];
		} elseif ( ! is_array( $value ) || isset( $value['id'] ) ) {
			$value = [
				$value,
			];
		}

		$value = array_unique( array_filter( $value ), SORT_REGULAR );

		$pod_data = null;

		if ( $pod instanceof Pods ) {
			$pod_data = $pod->pod_data;
		} elseif ( $pod instanceof Pod ) {
			$pod_data = $pod;
		} elseif ( is_array( $pod ) ) {
			$pod_data = $pod;
		}

		// Get pod type.
		$pod_type = $pod_data ? $pod_data['type'] : null;

		$first_attachment_id = null;

		// Handle File title saving.
		foreach ( $value as $attachment_id ) {
			$title = false;

			if ( is_array( $attachment_id ) ) {
				if ( isset( $attachment_id['title'] ) && 0 < strlen( trim( $attachment_id['title'] ) ) ) {
					$title = trim( $attachment_id['title'] );
				}

				if ( isset( $attachment_id['id'] ) ) {
					$attachment_id = (int) $attachment_id['id'];
				} else {
					$attachment_id = 0;
				}
			}

			if ( empty( $attachment_id ) ) {
				continue;
			}

			$attachment      = null;
			$attachment_data = array();

			$attachment = get_post( $attachment_id );

			if ( ! $attachment ) {
				continue;
			}

			if ( null === $first_attachment_id ) {
				$first_attachment_id = $attachment_id;
			}

			// Update the title if set.
			if (
				false !== $title
				&& 1 === (int) pods_v( static::$type . '_edit_title', $options, 0 )
				&& $attachment->post_title !== $title
			) {
				$attachment_data['post_title'] = $title;
			}

			// Update attachment parent if it's not set yet and we're updating a post.
			if ( 'post_type' === $pod_type && ! empty( $params->id ) ) {
				$attachment = get_post( $attachment_id );

				if ( isset( $attachment->post_parent ) && 0 === (int) $attachment->post_parent ) {
					$attachment_data['post_parent'] = (int) $params->id;
				}
			}

			// Update the attachment if it the data array is not still empty.
			if ( ! empty( $attachment_data ) ) {
				$attachment_data['ID'] = $attachment_id;

				if ( $attachment ) {
					// Add post type to trigger attachment update filters from other plugins.
					$attachment_data['post_type'] = $attachment->post_type;
				}

				self::$api->save_wp_object( 'media', $attachment_data );
			}
		}//end foreach

		// Set the first image as the featured image if the option is set.
		if ( 'post_type' === $pod_type && ! empty( $options[ static::$type . '_auto_set_featured_image' ] ) && ! empty( $first_attachment_id ) ) {
			set_post_thumbnail( $id, $first_attachment_id );
		}
	}

	/**
	 * {@inheritdoc}
	 */
	public function ui( $id, $value, $name = null, $options = null, $fields = null, $pod = null ) {

		if ( empty( $value ) ) {
			return;
		}

		if ( ! empty( $value ) && isset( $value['ID'] ) ) {
			$value = array( $value );
		}

		$type       = static::$type;
		$image_size = apply_filters( "pods_form_ui_field_{$type}_ui_image_size", 'thumbnail', $id, $value, $name, $options, $pod );

		return $this->images( $id, $value, $name, $options, $pod, $image_size );

	}

	/**
	 * Return image(s) markup.
	 *
	 * @param int    $id         Item ID.
	 * @param mixed  $value      Field value.
	 * @param string $name       Field name.
	 * @param array  $options    Field options.
	 * @param array  $pod        Pod options.
	 * @param string $image_size Image size.
	 *
	 * @return string
	 * @since 2.3.0
	 */
	public function images( $id, $value, $name = null, $options = null, $pod = null, $image_size = null ) {

		$images = '';

		if ( empty( $value ) || ! is_array( $value ) ) {
			return $images;
		}

		foreach ( $value as $v ) {
			$images .= pods_image( $v, $image_size );
		}

		return $images;

	}

	/**
	 * Data callback for Image Sizes.
	 *
	 * @param string       $name    The name of the field.
	 * @param string|array $value   The value of the field.
	 * @param array        $options Field options.
	 * @param array        $pod     Pod data.
	 * @param int          $id      Item ID.
	 *
	 * @return array
	 *
	 * @since 2.3.0
	 */
	public function data_image_sizes( $name = null, $value = null, $options = null, $pod = null, $id = null ) {

		$data = array();

		$image_sizes = get_intermediate_image_sizes();

		foreach ( $image_sizes as $image_size ) {
			$data[ $image_size ] = ucwords( str_replace( '-', ' ', $image_size ) );
		}

		$data['full'] = __( 'Full Size' ); // Translated by WordPress core.

		return apply_filters( 'pods_form_ui_field_pick_data_image_sizes', $data, $name, $value, $options, $pod, $id );

	}

	/**
	 * Create a WP Gallery from the passed values (need to be attachments)
	 *
	 * @since 2.7.0
	 *
	 * @param  string|array $value   The value(s).
	 * @param  array        $options The field options.
	 *
	 * @return string
	 */
	public function do_wp_gallery( $value, $options ) {

		if ( ! $value ) {
			return '';
		}

		$shortcode_args = array();

		if ( ! empty( $options[ static::$type . '_wp_gallery_columns' ] ) ) {
			$shortcode_args['columns'] = absint( $options[ static::$type . '_wp_gallery_columns' ] );
		}

		if ( ! empty( $options[ static::$type . '_wp_gallery_random_sort' ] ) ) {
			$shortcode_args['orderby'] = 'rand';
		}

		if ( ! empty( $options[ static::$type . '_wp_gallery_link' ] ) ) {
			$shortcode_args['link'] = $options[ static::$type . '_wp_gallery_link' ];
		}

		if ( ! empty( $options[ static::$type . '_wp_gallery_size' ] ) ) {
			$shortcode_args['size'] = $options[ static::$type . '_wp_gallery_size' ];
		}

		if ( isset( $value['ID'] ) ) {
			$shortcode_args['ids'] = $value['ID'];
		} else {
			$images = array();

			foreach ( (array) $value as $v ) {
				if ( ! is_array( $v ) ) {
					$images[] = (int) $v;
				} elseif ( isset( $v['ID'] ) ) {
					$images[] = (int) $v['ID'];
				}
			}

			$shortcode_args['ids'] = implode( ',', $images );
		}

		if ( is_callable( 'gallery_shortcode' ) ) {
			return gallery_shortcode( $shortcode_args );
		} else {
			$shortcode = '[gallery';

			foreach ( $shortcode_args as $key => $shortcode_arg ) {
				$shortcode .= ' ' . esc_attr( $key ) . '="' . esc_attr( $shortcode_arg ) . '"';
			}

			$shortcode .= ']';

			return do_shortcode( $shortcode );
		}

	}

	/**
	 * Handle file row output for uploaders
	 *
	 * @param array           $attributes Field options.
	 * @param int             $limit      List limit.
	 * @param bool            $editable   Whether the items should be editable.
	 * @param null|int|string $id         Item ID.
	 * @param null|string     $icon       Icon URL.
	 * @param null|string     $name       File name.
	 * @param bool            $linked     Whether the items should be linked.
	 * @param null|string     $link       Link URL.
	 *
	 * @return string
	 * @since 2.0.0
	 *
	 * @deprecated 2.7.0
	 */
	public function markup( $attributes, $limit = 1, $editable = true, $id = null, $icon = null, $name = null, $linked = false, $link = null ) {

		_doing_it_wrong( 'PodsField_File::markup', esc_html__( 'This method has been deprecated and will be removed from Pods 3.0', 'pods' ), '2.7' );

		// Preserve current file type.
		$field_type = PodsForm::$field_type;

		ob_start();

		if ( empty( $id ) ) {
			$id = '{{id}}';
		}

		if ( empty( $icon ) ) {
			$icon = '{{icon}}';
		}

		if ( empty( $name ) ) {
			$name = '{{name}}';
		}

		if ( empty( $link ) ) {
			$link = '{{link}}';
		}

		$editable = (boolean) $editable;
		$linked   = (boolean) $linked;
		?>
		<li class="pods-file hidden" id="pods-file-<?php echo esc_attr( $id ); ?>">
			<?php
				// @codingStandardsIgnoreLine
				echo PodsForm::field( $attributes['name'] . '[' . $id . '][id]', $id, 'hidden' );
			?>

			<ul class="pods-file-meta media-item">
				<?php if ( 1 !== (int) $limit ) { ?>
					<li class="pods-file-col pods-file-handle">Handle</li>
				<?php } ?>

				<li class="pods-file-col pods-file-icon">
					<img class="pinkynail" src="<?php echo esc_url( $icon ); ?>" alt="Icon" />
				</li>

				<li class="pods-file-col pods-file-name">
					<?php
					if ( $editable ) {
						// @codingStandardsIgnoreLine
						echo PodsForm::field( $attributes['name'] . '[' . $id . '][title]', $name, 'text' );
					} else {
						echo esc_html( $name );
					}
					?>
				</li>

				<li class="pods-file-col pods-file-actions">
					<ul>
						<li class="pods-file-col pods-file-delete"><a href="#delete">Delete</a></li>
						<?php
						if ( $linked ) {
							?>
							<li class="pods-file-col pods-file-download">
								<a href="<?php echo esc_url( $link ); ?>" target="_blank" rel="noopener noreferrer">Download</a></li>
							<?php
						}
						?>
					</ul>
				</li>
			</ul>
		</li>
		<?php
		PodsForm::$field_type = $field_type;

		return ob_get_clean();

	}

	/**
	 * Handle AJAX plupload calls.
	 *
	 * @since 2.3.0
	 */
	public function admin_ajax_upload() {

		pods_session_start();

		// Sanitize input @codingStandardsIgnoreLine
		$params = pods_unslash( (array) $_POST );

		foreach ( $params as $key => $value ) {
			if ( 'action' === $key ) {
				continue;
			}

			unset( $params[ $key ] );

			$params[ str_replace( '_podsfix_', '', $key ) ] = $value;
		}

		$params = (object) $params;

		$methods = array(
			'upload',
		);

		if ( ! isset( $params->method ) || ! in_array( $params->method, $methods, true ) ) {
			pods_error( __( 'Invalid AJAX request', 'pods' ), PodsInit::$admin );
		} elseif ( ! empty( $params->pod_name ) && empty( $params->field_name ) ) {
			pods_error( __( 'Invalid AJAX request', 'pods' ), PodsInit::$admin );
		} elseif ( empty( $params->pod_name ) && ! current_user_can( 'upload_files' ) ) {
			pods_error( __( 'Invalid AJAX request', 'pods' ), PodsInit::$admin );
		}

		// Flash often fails to send cookies with the POST or upload, so we need to pass it in GET or POST instead
		// @codingStandardsIgnoreLine
		if ( is_ssl() && empty( $_COOKIE[ SECURE_AUTH_COOKIE ] ) && ! empty( $_REQUEST['auth_cookie'] ) ) {
			// @codingStandardsIgnoreLine
			$_COOKIE[ SECURE_AUTH_COOKIE ] = $_REQUEST['auth_cookie'];
			// @codingStandardsIgnoreLine
		} elseif ( empty( $_COOKIE[ AUTH_COOKIE ] ) && ! empty( $_REQUEST['auth_cookie'] ) ) {
			// @codingStandardsIgnoreLine
			$_COOKIE[ AUTH_COOKIE ] = $_REQUEST['auth_cookie'];
		}

		// @codingStandardsIgnoreLine
		if ( empty( $_COOKIE[ LOGGED_IN_COOKIE ] ) && ! empty( $_REQUEST['logged_in_cookie'] ) ) {
			// @codingStandardsIgnoreLine
			$_COOKIE[ LOGGED_IN_COOKIE ] = $_REQUEST['logged_in_cookie'];
		}

		global $current_user;
		unset( $current_user );

		/**
		 * Access Checking
		 */
		$upload_disabled   = false;
		$is_user_logged_in = is_user_logged_in();

		if ( defined( 'PODS_DISABLE_FILE_UPLOAD' ) && true === PODS_DISABLE_FILE_UPLOAD ) {
			$upload_disabled = true;
		} elseif ( ! $is_user_logged_in && defined( 'PODS_UPLOAD_REQUIRE_LOGIN' ) ) {
			if ( true === PODS_UPLOAD_REQUIRE_LOGIN ) {
				$upload_disabled = true;
			} elseif ( is_string( PODS_UPLOAD_REQUIRE_LOGIN ) && ! current_user_can( PODS_UPLOAD_REQUIRE_LOGIN ) ) {
				$upload_disabled = true;
			}
		}

		if ( true === $upload_disabled ) {
			pods_error( __( 'Unauthorized request', 'pods' ), PodsInit::$admin );
		}

		if ( ! isset( $params->_wpnonce, $params->pod_name, $params->field_name, $params->uri_hash, $params->id ) ) {
			pods_error( __( 'Unauthorized request', 'pods' ), PodsInit::$admin );
		}

		$_wpnonce   = $params->_wpnonce;
		$pod_name   = $params->pod_name;
		$field_name = $params->field_name;
		$uri_hash   = $params->uri_hash;
		$id         = (int) $params->id;

		$uid = pods_session_id();

		if ( is_user_logged_in() ) {
			$uid = 'user_' . get_current_user_id();
		}

		$nonce_name = 'pods_upload:' . json_encode( compact( 'pod_name', 'field_name', 'uid', 'uri_hash', 'id' ) );

		if ( false === wp_verify_nonce( $_wpnonce, $nonce_name ) ) {
			pods_error( __( 'Unauthorized request', 'pods' ), PodsInit::$admin );
		}

		if ( empty( self::$api ) ) {
			self::$api = pods_api();
		}

		$pod = self::$api->load_pod( [
			'name' => $pod_name,
		] );

		if ( ! $pod ) {
			pods_error( __( 'Invalid Pod configuration', 'pods' ), PodsInit::$admin );
		}

		$field = $pod->get_field( $field_name );

		if ( ! $field ) {
			pods_error( __( 'Invalid Field configuration', 'pods' ), PodsInit::$admin );
		}

		if ( ! $field->is_file() ) {
			pods_error( __( 'Invalid field', 'pods' ), PodsInit::$admin );
		}

		if ( empty( self::$api ) ) {
			self::$api = pods_api();
		}

		self::$api->display_errors = false;

		$method = $params->method;

		// Cleaning up $params
		unset( $params->action, $params->method, $params->_wpnonce );

		$params->post_id = (int) pods_v( 'post_id', $params, 0 );

		/**
		 * Upload a new file (advanced - returns URL and ID)
		 */
		if ( 'upload' === $method ) {
			$file = $_FILES['Filedata'];

			$limit_size = pods_v( $field['type'] . '_restrict_filesize', $field );

			if ( ! empty( $limit_size ) ) {
				if ( false !== stripos( $limit_size, 'GB' ) ) {
					$limit_size = (float) trim( str_ireplace( 'GB', '', $limit_size ) );
					$limit_size = $limit_size * 1025 * 1025 * 1025;
					// convert to MB to KB to B
				} elseif ( false !== stripos( $limit_size, 'MB' ) ) {
					$limit_size = (float) trim( str_ireplace( 'MB', '', $limit_size ) );
					$limit_size = $limit_size * 1025 * 1025;
					// convert to KB to B
				} elseif ( false !== stripos( $limit_size, 'KB' ) ) {
					$limit_size  = (float) trim( str_ireplace( 'KB', '', $limit_size ) );
					$limit_size *= 1025;
					// convert to B
				} elseif ( false !== stripos( $limit_size, 'B' ) ) {
					$limit_size = (float) trim( str_ireplace( 'B', '', $limit_size ) );
				} else {
					$limit_size = wp_max_upload_size();
				}

				if ( 0 < $limit_size && $limit_size < $file['size'] ) {
					$error = sprintf(
						__( 'Error: File size too large, max size is %s', 'pods' ),
						pods_v( $field['type'] . '_restrict_filesize', $field )
					);

					pods_error( '<div style="color:#FF0000">' . $error . '</div>' );
				}
			}//end if

			$file_mime_types = $this->get_file_mime_types_for_field( $field );

			if ( null !== $file_mime_types ) {
				$file_mime_types_extensions = $file_mime_types['extensions'];
				$file_mime_types_mapping    = $file_mime_types['mapping'];

				$file_info = pathinfo( $file['name'] );
				$ok        = false;

				if ( isset( $file_info['extension'] ) ) {
					// Enforce lowercase for the extension checking.
					$file_info['extension'] = strtolower( $file_info['extension'] );

					$ok = isset( $file_mime_types_mapping[ $file_info['extension'] ] );
				}

				if ( false === $ok ) {
					$error = sprintf(
						__( 'Error: File type not allowed, please use one of the following: %s', 'pods' ),
						'.' . implode( ', .', $file_mime_types_extensions )
					);

					pods_error( '<div style="color:#FF0000"><p>' . esc_html( $error ) . '</p></div>' );
				}

				// Confirm mime type if we can.
				if ( ! empty( $file_mime_types_mapping[ $file_info['extension'] ] ) ) {
					if ( 0 === strpos( $file_mime_types_mapping[ $file_info['extension'] ], 'image/' ) ) {
						$real_mime = wp_get_image_mime( $file['name'] );
					} elseif ( extension_loaded( 'fileinfo' ) ) {
						// Use finfo to get the mime type information.
						$finfo_resource = finfo_open( FILEINFO_MIME_TYPE );
						$real_mime      = finfo_file( $finfo_resource, $file['name'] );
						finfo_close( $finfo_resource );
					} else {
						// No other validation we can do, just make the mime type match to bypass the next check.
						$real_mime = $file_mime_types_mapping[ $file_info['extension'] ];
					}

					// Do not allow if the mime type was found and it does not match.
					if ( $real_mime && $real_mime !== $file_mime_types_mapping[ $file_info['extension'] ] ) {
						$error = sprintf(
							__( 'Error: File mime type "%s" not expected, please ensure your file is valid: %s', 'pods' ),
							$real_mime,
							'.' . $file_info['extension'] . ' (' . $file_mime_types_mapping[ $file_info['extension'] ] . ')'
						);

						pods_error( '<div style="color:#FF0000"><p>' . esc_html( $error ) . '</p></div>' );
					}
				}
			}//end if

			$custom_handler = apply_filters( 'pods_upload_handle', null, 'Filedata', $params->post_id, $params, $field );

			if ( null === $custom_handler ) {

				// Start custom directory.
				$upload_dir = pods_v( $field['type'] . '_upload_dir', $field, 'wp' );

				if ( 'wp' !== $upload_dir ) {
					$custom_dir  = pods_v( $field['type'] . '_upload_dir_custom', $field, '' );
					$context_pod = null;

					if ( $params->post_id ) {
						$context_pod = pods_get_instance( pods_v( 'name', $pod, false ), $params->post_id );

						if ( ! $context_pod->exists() ) {
							$context_pod = null;
						}
					}

					/**
					 * Filter the custom upload directory Pod context.
					 *
					 * @since 2.7.28
					 *
					 * @param Pods   $context_pod The Pods object of the associated pod for the post type.
					 * @param object $params      The POSTed parameters for the request.
					 * @param array  $field       The field configuration associated to the upload field.
					 * @param array  $pod         The pod configuration associated to the upload field.
					 */
					$context_pod = apply_filters( 'pods_upload_dir_custom_context_pod', $context_pod, $params, $field, $pod );

					$custom_dir = pods_evaluate_tags( $custom_dir, array( 'pod' => $context_pod ) );

					/**
					 * Filter the custom Pod upload directory.
					 *
					 * @since 2.7.28
					 *
					 * @param string $custom_dir  The directory to use for the uploaded file.
					 * @param object $params      The POSTed parameters for the request.
					 * @param Pods   $context_pod The Pods object of the associated pod for the post type.
					 * @param array  $field       The field configuration associated to the upload field.
					 * @param array  $pod         The pod configuration associated to the upload field.
					 */
					$custom_dir = apply_filters( 'pods_upload_dir_custom', $custom_dir, $params, $context_pod, $field, $pod );

					self::$tmp_upload_dir = $custom_dir;

					add_filter( 'upload_dir', array( $this, 'filter_upload_dir' ) );
				}

				// Upload file.
				$attachment_id = media_handle_upload( 'Filedata', $params->post_id );

				// End custom directory.
				if ( 'wp' !== $upload_dir ) {
					remove_filter( 'upload_dir', array( $this, 'filter_upload_dir' ) );

					self::$tmp_upload_dir = null;
				}

				if ( is_object( $attachment_id ) ) {
					$errors = array();

					foreach ( $attachment_id->errors['upload_error'] as $error_code => $error_message ) {
						$errors[] = '[' . $error_code . '] ' . $error_message;
					}

					pods_error( '<div style="color:#FF0000">Error: ' . implode( '</div><div>', $errors ) . '</div>' );
				} else {
					$attachment = get_post( $attachment_id, ARRAY_A );

					$attachment['filename'] = basename( $attachment['guid'] );

					$thumb = wp_get_attachment_image_src( $attachment['ID'], 'thumbnail', true );

					$attachment['thumbnail'] = '';

					if ( ! empty( $thumb[0] ) ) {
						$attachment['thumbnail'] = $thumb[0];
					}

					$attachment['link']      = get_permalink( $attachment['ID'] );
					$attachment['edit_link'] = get_edit_post_link( $attachment['ID'] );
					$attachment['download']  = wp_get_attachment_url( $attachment['ID'] );

					$attachment = apply_filters( 'pods_upload_attachment', $attachment, $params->item_id );

					wp_send_json( $attachment );
				}//end if
			}//end if
		}//end if

		die();
		// KBAI!
	}

	/**
	 * Modify the upload directory.
	 *
	 * @since 2.7.28
	 *
	 * @see wp_upload_dir()
	 *
	 * @param array $uploads The uploads directory information.
	 *
	 * @return array The filtered uploads directory information.
	 */
	public function filter_upload_dir( $uploads ) {
		if ( empty( self::$tmp_upload_dir ) ) {
			return $uploads;
		}

		$dir    = trim( self::$tmp_upload_dir, '/' );
		$subdir = trim( $uploads['subdir'], '/' );

		foreach ( $uploads as $key => $val ) {
			if ( ! is_string( $val ) ) {
				continue;
			}

			if ( $subdir ) {
				$uploads[ $key ] = str_replace( $subdir, $dir, $val );
			} elseif ( in_array( $key, array( 'path', 'url', 'subdir' ), true ) ) {
				$uploads[ $key ] = trailingslashit( $val ) . $dir;
			}
		}

		return $uploads;
	}

	/**
	 * Build field data for Pods DFV.
	 *
	 * @param object $args            {
	 *     Field information arguments.
	 *
	 *     @type string     $name            Field name.
	 *     @type string     $type            Field type.
	 *     @type array      $options         Field options.
	 *     @type mixed      $value           Current value.
	 *     @type array      $pod             Pod information.
	 *     @type int|string $id              Current item ID.
	 *     @type string     $form_field_type HTML field type.
	 * }
	 *
	 * @return array
	 */
	public function build_dfv_field_data( $args ) {
		$data = parent::build_dfv_field_data( $args );

		// Normalize arrays for multiple select.
		if ( is_array( $data['fieldValue'] ) ) {
			$data['fieldValue'] = array_values( $data['fieldValue'] );
		}

		return $data;
	}

	/**
	 * Get the file mime type information for a field.
	 *
	 * @since 2.9.0
	 *
	 * @param Field|array $field The field to use.
	 *
	 * @return null|array Null if any are allowed, otherwise an array with the file mime type information including the
	 *                    list of extensions, mime types, and mapping of extensions to mime types.
	 */
	public function get_file_mime_types_for_field( $field ) {
		$media_type  = pods_v( $field['type'] . '_type', $field, 'images', true );

		$other_extensions = [];

		if ( 'images' === $media_type ) {
			// Limit to basic images.
			$media_type       = 'other';
			$other_extensions = [
				'jpg',
				'jpeg',
				'png',
				'gif',
				'webp',
			];
		} elseif ( 'video' === $media_type ) {
			// Limit to basic video.
			$media_type       = 'other';
			$other_extensions = [
				'mpg',
				'mov',
				'flv',
				'mp4',
			];
		} elseif ( 'audio' === $media_type ) {
			// Limit to basic audio.
			$media_type       = 'other';
			$other_extensions = [
				'mp3',
				'm4a',
				'wav',
				'wma',
			];
		} elseif ( 'text' === $media_type ) {
			// Limit to basic text.
			$media_type       = 'other';
			$other_extensions = [
				'txt',
				'csv',
				'tsv',
				'rtx'
			];
		} elseif ( 'other' === $media_type ) {
			// Allow specifying allowed extensions.
			$other_extensions = pods_v( $field['type'] . '_allowed_extensions', $field, '', true );

			$other_extensions = trim(
				str_replace(
					[
						' ',
						'.',
						"\n",
						"\t",
						';',
						'|',
					],
					[
						',',
						',',
						',',
						',',
						',',
					],
					$other_extensions
				),
				', '
			);
		} elseif ( false !== strpos( $media_type, '-any' ) ) {
			// Handle cases where we want to support any of a specific mime type grouping.
			$media_type = str_replace( '-any', '', $media_type );

			// Images should map to 'image/' mime type.
			if ( 'images' === $media_type ) {
				$media_type = 'image';
			}
		}

		return $this->get_file_mime_types_for_media_type( $media_type, $other_extensions, $field );
	}

	/**
	 * Get the file mime type information for a specific media type and other file extensions.
	 *
	 * @since 2.9.0
	 *
	 * @param string           $media_type       The media type to use for looking up by mime type.
	 * @param string|array     $other_extensions The other file extensions that may have been provided.
	 * @param Field|array|null $field            The field to use.
	 *
	 * @return null|array Null if any are allowed, otherwise an array with the file mime type information including the
	 *                    list of extensions, mime types, and mapping of extensions to mime types.
	 */
	public function get_file_mime_types_for_media_type( $media_type, $other_extensions = [], $field = null ) {
		if ( 'any' === $media_type ) {
			return null;
		}

		if ( ! $other_extensions ) {
			$other_extensions = [];
		} elseif ( ! is_array( $other_extensions ) ) {
			$other_extensions = explode( ',', $other_extensions );
		}

		$mime_types = get_allowed_mime_types();

		$file_extensions = [];

		if ( $other_extensions ) {
			// Handle custom list of extensions and map them to mime types if we can.
			foreach ( $other_extensions as $other_extension ) {
				$found = false;

				foreach ( $mime_types as $extension => $mime_type ) {
					$extensions = explode( '|', $extension );

					if ( ! in_array( $other_extension, $extensions, true ) ) {
						continue;
					}

					$found = true;

					$file_extensions[ $other_extension ] = $mime_type;

					break;
				}

				if ( ! $found ) {
					$file_extensions[ $other_extension ] = '';
				}
			}
		} elseif ( 'other' !== $media_type ) {
			// Handle specific media type as a mime type prefix like (image/, audio/, video/, etc).
			foreach ( $mime_types as $extension => $mime_type ) {
				if ( 0 !== strpos( $mime_type, $media_type . '/' ) ) {
					continue;
				}

				$extensions = explode( '|', $extension );

				foreach ( $extensions as $file_extension ) {
					$file_extensions[ $file_extension ] = $mime_type;
				}
			}
		}

		/**
		 * Allow filtering the file extensions allowed for a media type and other file extensions provided.
		 *
		 * @since 2.9.0
		 *
		 * @param null|array       $file_extensions  Null if any are allowed, otherwise an array with the file mime type
		 *                                           information including the list of extensions, mime types, and mapping
		 *                                           of extensions to mime types.
		 * @param string           $media_type       The media type to use for looking up by mime type.
		 * @param string|array     $other_extensions The other file extensions that may have been provided.
		 * @param Field|array|null $field            The field to use.
		 */
		$file_extensions = apply_filters(
			'pods_form_ui_field_file_mime_types_for_media_type',
			$file_extensions,
			$media_type,
			$other_extensions,
			$field
		);

		return [
			'mime_types' => array_filter( array_unique( array_values( $file_extensions ) ) ),
			'extensions' => array_filter( array_unique( array_keys( $file_extensions ) ) ),
			'mapping'    => $file_extensions,
		];
	}

}
