ACF gallery field to display attachment_metadata for EXIF

gistfile1.txt

<?php

/*
*  ACF Gallery Field Class
*
*  All the logic for this field type
*
*  @class 		acf_field_gallery
*  @extends		acf_field
*  @package		ACF
*  @subpackage	Fields
*/

if( ! class_exists('acf_field_gallery') ) :

class acf_field_gallery extends acf_field {
	
	
	/*
	*  __construct
	*
	*  This function will setup the field type data
	*
	*  @type	function
	*  @date	5/03/2014
	*  @since	5.0.0
	*
	*  @param	n/a
	*  @return	n/a
	*/
	
	function __construct() {
		
		// vars
		$this->name = 'gallery';
		$this->label = __("Gallery",'acf');
		$this->category = 'content';
		$this->defaults = array(
			'preview_size'	=> 'thumbnail',
			'library'		=> 'all',
			'min'			=> 0,
			'max'			=> 0,
		);
		$this->l10n = array(
			'select'		=> __("Add Image to Gallery",'acf'),
			'edit'			=> __("Edit Image",'acf'),
			'update'		=> __("Update Image",'acf'),
			'uploadedTo'	=> __("uploaded to this post",'acf'),
			'max'			=> __("Maximum selection reached",'acf'),
			
			'tmpl'			=> '<div data-id="<%= id %>" class="acf-gallery-attachment acf-soh">
									<input type="hidden" value="<%= id %>" name="<%= name %>[]">
									<div class="padding">
										<img alt="" src="<%= url %>">
									</div>
									<div class="actions acf-soh-target">
										<a href="#" class="acf-icon dark remove-attachment" data-id="<%= id %>">
											<i class="acf-sprite-delete"></i>
										</a>
									</div>
								</div>'
		);
		
		
		// actions
		add_action('wp_ajax_acf/fields/gallery/get_attachment',				array($this, 'ajax_get_attachment'));
		add_action('wp_ajax_nopriv_acf/fields/gallery/get_attachment',		array($this, 'ajax_get_attachment'));
		
		add_action('wp_ajax_acf/fields/gallery/update_attachment',			array($this, 'ajax_update_attachment'));
		add_action('wp_ajax_nopriv_acf/fields/gallery/update_attachment',	array($this, 'ajax_update_attachment'));
		
		add_action('wp_ajax_acf/fields/gallery/get_sort_order',				array($this, 'ajax_get_sort_order'));
		add_action('wp_ajax_nopriv_acf/fields/gallery/get_sort_order',		array($this, 'ajax_get_sort_order'));
		
		
		
		// do not delete!
    	parent::__construct();
	}
	
	
	/*
	*  ajax_get_attachment
	*
	*  description
	*
	*  @type	function
	*  @date	13/12/2013
	*  @since	5.0.0
	*
	*  @param	$post_id (int)
	*  @return	$post_id (int)
	*/
	
	function ajax_get_attachment() {
	
		// options
   		$options = acf_parse_args( $_POST, array(
			'post_id'		=>	0,
			'id'			=>	0,
			'field_key'		=>	'',
			'nonce'			=>	'',
		));
   		
		
		// validate
		if( ! wp_verify_nonce($options['nonce'], 'acf_nonce') ) {
			
			die();
			
		}
		
		if( empty($options['id']) ) {
		
			die();
			
		}
		
		
		// load field
		$field = acf_get_field( $options['field_key'] );
		
		if( !$field ) {
		
			die();
			
		}
		
		
		// render
		$this->render_attachment( $options['id'], $field );
		die;
		
	}
	
	
	/*
	*  ajax_update_attachment
	*
	*  description
	*
	*  @type	function
	*  @date	13/12/2013
	*  @since	5.0.0
	*
	*  @param	$post_id (int)
	*  @return	$post_id (int)
	*/
	
	function ajax_update_attachment() {
		
		
		// validate
		if( ! wp_verify_nonce($_REQUEST['nonce'], 'acf_nonce') ) {
		
			wp_send_json_error();
			
		}
		
		
		if( empty($_REQUEST['attachments']) ) {
		
			wp_send_json_error();
			
		}
		
		
		foreach( $_REQUEST['attachments'] as $id => $changes ) {
			
			if ( ! current_user_can( 'edit_post', $id ) )
				wp_send_json_error();
				
			$post = get_post( $id, ARRAY_A );
		
			if ( 'attachment' != $post['post_type'] )
				wp_send_json_error();
		
			if ( isset( $changes['title'] ) )
				$post['post_title'] = $changes['title'];
		
			if ( isset( $changes['caption'] ) )
				$post['post_excerpt'] = $changes['caption'];
		
			if ( isset( $changes['description'] ) )
				$post['post_content'] = $changes['description'];
		
			if ( isset( $changes['alt'] ) ) {
				$alt = wp_unslash( $changes['alt'] );
				if ( $alt != get_post_meta( $id, '_wp_attachment_image_alt', true ) ) {
					$alt = wp_strip_all_tags( $alt, true );
					update_post_meta( $id, '_wp_attachment_image_alt', wp_slash( $alt ) );
				}
			}
			
			
			// save post
			wp_update_post( $post );
			
			
			// save meta
			acf_save_post( $id );
						
		}
		
		wp_send_json_success();
			
	}
	
	
	/*
	*  ajax_get_sort_order
	*
	*  description
	*
	*  @type	function
	*  @date	13/12/2013
	*  @since	5.0.0
	*
	*  @param	$post_id (int)
	*  @return	$post_id (int)
	*/
	
	function ajax_get_sort_order() {
		
		// vars
		$r = array();
		$order = 'DESC';
   		$args = acf_parse_args( $_POST, array(
			'ids'			=>	0,
			'sort'			=>	'date',
			'field_key'		=>	'',
			'nonce'			=>	'',
		));
		
		
		// validate
		if( ! wp_verify_nonce($args['nonce'], 'acf_nonce') ) {
		
			wp_send_json_error();
			
		}
		
		
		// reverse
		if( $args['sort'] == 'reverse' ) {
		
			$ids = array_reverse($args['ids']);
			
			wp_send_json_success($ids);
			
		}
		
		
		if( $args['sort'] == 'title' ) {
			
			$order = 'ASC';
			
		}
		
		
		// find attachments (DISTINCT POSTS)
		$ids = get_posts(array(
			'post_type'		=> 'attachment',
			'numberposts'	=> -1,
			'post_status'	=> 'any',
			'post__in'		=> $args['ids'],
			'order'			=> $order,
			'orderby'		=> $args['sort'],
			'fields'		=> 'ids'		
		));
		
		
		// success
		if( !empty($ids) ) {
		
			wp_send_json_success($ids);
			
		}
		
		
		// failure
		wp_send_json_error();
		
	}
	
	
	/*
	*  render_attachment
	*
	*  description
	*
	*  @type	function
	*  @date	13/12/2013
	*  @since	5.0.0
	*
	*  @param	$post_id (int)
	*  @return	$post_id (int)
	*/
	
	function render_attachment( $id = 0, $field ) {
		
		$attachment = wp_prepare_attachment_for_js( $id );
		$prefix = "attachments[{$id}]";
		$compat = get_compat_media_markup( $id );
		
		?>
		<div class="acf-gallery-side-info acf-cf">
			<img src="<?php echo $attachment['sizes']['thumbnail']['url']; ?>" alt="<?php echo $attachment['alt']; ?>" />
			<p class="filename"><strong><?php _e('Attachment Details', 'acf'); ?></strong></p>
			<p class="uploaded"><?php echo $attachment['dateFormatted']; ?></p>
			<p class="dimensions"><?php echo $attachment['width']; ?> × <?php echo $attachment['height']; ?> </p>
			<p class="actions"><a href="#" class="edit-attachment" data-id="<?php echo $id; ?>">Edit</a> <a href="#" class="remove-attachment" data-id="<?php echo $id; ?>">Remove</a></p>
		</div>
		<table class="form-table">
			<tbody>
				<?php 
				
				acf_render_field_wrap(array(
					//'key'		=> "{$field['key']}-title",
					'name'		=> 'title',
					'prefix'	=> $prefix,
					'type'		=> 'text',
					'label'		=> 'Title',
					'value'		=> $attachment['title']
				), 'tr');
				
				acf_render_field_wrap(array(
					//'key'		=> "{$field['key']}-caption",
					'name'		=> 'caption',
					'prefix'	=> $prefix,
					'type'		=> 'textarea',
					'label'		=> 'Caption',
					'value'		=> $attachment['caption']
				), 'tr');
				
				acf_render_field_wrap(array(
					//'key'		=> "{$field['key']}-alt",
					'name'		=> 'alt',
					'prefix'	=> $prefix,
					'type'		=> 'text',
					'label'		=> 'Alt Text',
					'value'		=> $attachment['alt']
				), 'tr');
				
				acf_render_field_wrap(array(
					//'key'		=> "{$field['key']}-description",
					'name'		=> 'description',
					'prefix'	=> $prefix,
					'type'		=> 'textarea',
					'label'		=> 'Description',
					'value'		=> $attachment['description']
				), 'tr');
				
				?>
			</tbody>
		</table>
		<?php echo $compat['item']; ?>
		
		<?php
		
	}
	
	
	/*
	*  render_field()
	*
	*  Create the HTML interface for your field
	*
	*  @param	$field - an array holding all the field's data
	*
	*  @type	action
	*  @since	3.6
	*  @date	23/01/13
	*/
	
	function render_field( $field ) {
		
		// enqueue
		acf_enqueue_uploader();
		
		
		// vars
		$atts = array(
			'id'				=> $field['id'],
			'class'				=> "acf-gallery {$field['class']}",
			'data-preview_size'	=> $field['preview_size'],
			'data-library'		=> $field['library'],
			'data-min'			=> $field['min'],
			'data-max'			=> $field['max'],
		);
		
		// vars
		$height = acf_get_user_setting('gallery_height', 400);
		$height = max( $height, 200 ); // minimum height is 200
		$atts['style'] = "height:{$height}px";
		
		?>
<div <?php acf_esc_attr_e($atts); ?>>
	
	<div class="acf-hidden">
		<input type="hidden" <?php acf_esc_attr_e(array( 'name' => $field['name'], 'value' => '', 'data-name' => 'ids' )); ?> />
	</div>
	
	<div class="acf-gallery-main">
		
		<div class="acf-gallery-attachments">
			
			<?php if( !empty($field['value']) ): 
				
				// force value to array
				$field['value'] = acf_force_type_array( $field['value'] );
				
				
				// convert values to int
				$field['value'] = array_map('intval', $field['value']);
				
				
				foreach( $field['value'] as $id ): 
					
					// vars
					$mime_type = get_post_mime_type( $id );
					$src = '';
	
					if( strpos($mime_type, 'image') !== false )
					{
						$src = wp_get_attachment_image_src( $id, $field['preview_size'] );
						$src = $src[0];
					}
					else
					{
						$src = wp_mime_type_icon( $id );
					}
					
					?>
					
					<div class="acf-gallery-attachment acf-soh" data-id="<?php echo $id; ?>">
						<input type="hidden" name="<?php echo $field['name']; ?>[]" value="<?php echo $id; ?>" />
						<div class="padding">
							<img src="<?php echo $src; ?>" alt="" />
						</div>
						<div class="actions acf-soh-target">
							<a class="acf-icon dark remove-attachment" data-id="<?php echo $id; ?>" href="#">
								<i class="acf-sprite-delete"></i>
							</a>
						</div>
					</div>
					
				<?php endforeach; ?>
				
			<?php endif; ?>
			
			
		</div>
		
		<div class="acf-gallery-toolbar">
			
			<ul class="acf-hl">
				<li>
					<a href="#" class="acf-button blue add-attachment"><?php _e('Add to gallery', 'acf'); ?></a>
				</li>
				<li class="acf-fr">
					<select class="bulk-actions">
						<option value=""><?php _e('Bulk actions', 'acf'); ?></option>
						<option value="date"><?php _e('Sort by date uploaded', 'acf'); ?></option>
						<option value="modified"><?php _e('Sort by date modified', 'acf'); ?></option>
						<option value="title"><?php _e('Sort by title', 'acf'); ?></option>
						<option value="reverse"><?php _e('Reverse current order', 'acf'); ?></option>
					</select>
				</li>
			</ul>
			
		</div>
		
	</div>
	
	<div class="acf-gallery-side">
	<div class="acf-gallery-side-inner">
			
		<div class="acf-gallery-side-data"></div>
						
		<div class="acf-gallery-toolbar">
			
			<ul class="acf-hl">
				<li>
					<a href="#" class="acf-button close-sidebar"><?php _e('Close', 'acf'); ?></a>
				</li>
				<li class="acf-fr">
					<a class="acf-button blue update-attachment"><?php _e('Update', 'acf'); ?></a>
				</li>
			</ul>
			
		</div>
		
	</div>	
	</div>
	
</div>
		<?php
		
	}
	
	
	/*
	*  render_field_settings()
	*
	*  Create extra options for your field. This is rendered when editing a field.
	*  The value of $field['name'] can be used (like bellow) to save extra data to the $field
	*
	*  @type	action
	*  @since	3.6
	*  @date	23/01/13
	*
	*  @param	$field	- an array holding all the field's data
	*/
	
	function render_field_settings( $field ) {
		
		// min / max
		$field['min'] = empty($field['min']) ? '' : $field['min'];
		$field['max'] = empty($field['max']) ? '' : $field['max'];
		
		
		// min
		acf_render_field_setting( $field, array(
			'label'			=> __('Minimum Selection','acf'),
			'instructions'	=> '',
			'type'			=> 'number',
			'name'			=> 'min',
			'placeholder'	=> '0',
		));
		
		
		// max
		acf_render_field_setting( $field, array(
			'label'			=> __('Maximum Selection','acf'),
			'instructions'	=> '',
			'type'			=> 'number',
			'name'			=> 'max',
			'placeholder'	=> '0',
		));
		
		
		// preview_size
		acf_render_field_setting( $field, array(
			'label'			=> __('Preview Size','acf'),
			'instructions'	=> __('Shown when entering data','acf'),
			'type'			=> 'select',
			'name'			=> 'preview_size',
			'choices'		=> acf_get_image_sizes()
		));
		
		
		// library
		acf_render_field_setting( $field, array(
			'label'			=> __('Library','acf'),
			'instructions'	=> __('Limit the media library choice','acf'),
			'type'			=> 'radio',
			'name'			=> 'library',
			'layout'		=> 'horizontal',
			'choices' 		=> array(
				'all'			=> __('All', 'acf'),
				'uploadedTo'	=> __('Uploaded to post', 'acf')
			)
		));
		
	}
	
	
	/*
	*  format_value()
	*
	*  This filter is appied to the $value after it is loaded from the db and before it is returned to the template
	*
	*  @type	filter
	*  @since	3.6
	*  @date	23/01/13
	*
	*  @param	$value (mixed) the value which was loaded from the database
	*  @param	$post_id (mixed) the $post_id from which the value was loaded
	*  @param	$field (array) the field array holding all the field options
	*
	*  @return	$value (mixed) the modified value
	*/
	
	function format_value( $value, $post_id, $field ) {
		
		// bail early if no value
		if( empty($value) ) {
			
			return $value;
		
		}
		
		
		// force value to array
		$value = acf_force_type_array( $value );
		
		
		// convert values to int
		$value = array_map('intval', $value);
		
		
		// load posts in 1 query to save multiple DB calls from following code
		$posts = get_posts(array(
			'posts_per_page'	=> -1,
			'post_type'			=> 'attachment',
			'post_status'		=> 'any',
			'post__in'			=> $value,
			'orderby'			=> 'post__in'
		));
		
		foreach( $value as $k => $v ) {
			
			// get post
			$post = get_post( $v );
			
			
			
			// create $attachment
			$a = array(
				'ID'			=> $post->ID,
				'id'			=> $post->ID,
				'alt'			=> get_post_meta($post->ID, '_wp_attachment_image_alt', true),
				'title'			=> $post->post_title,
				'caption'		=> $post->post_excerpt,
				'description'	=> $post->post_content,
				'mime_type'		=> $post->post_mime_type,
				'type'			=> 'file',
				'url'			=> ''
			);
			
			
			// image
			if( strpos($a['mime_type'], 'image') !== false ) {
				
				// type
				$a['type'] = 'image';
				
				
				// url
				$src = wp_get_attachment_image_src( $a['ID'], 'full' );
				
				$a['url'] = $src[0];
				$a['width'] = $src[1];
				$a['height'] = $src[2];
				
				// find all image meta
				$image_meta = wp_get_attachment_metadata($post->ID);
				if( $image_meta ) {
					$a['image_meta'] = array();
					$a['image_meta']['aperture' ] = $image_meta[image_meta][aperture];
					$a['image_meta']['credit' ] = $image_meta[image_meta][credit];
					$a['image_meta']['camera' ] = $image_meta[image_meta][camera];
					$a['image_meta']['caption' ] = $image_meta[image_meta][caption];
					$a['image_meta']['created_timestamp' ] = $image_meta[image_meta][created_timestamp];
					$a['image_meta']['copyright' ] = $image_meta[image_meta][copyright];
					$a['image_meta']['focal_length' ] = $image_meta[image_meta][focal_length];
					$a['image_meta']['iso' ] = $image_meta[image_meta][iso];
					$a['image_meta']['shutter_speed' ] = $image_meta[image_meta][shutter_speed];
					$a['image_meta']['title' ] = $image_meta[image_meta][title];
					$a['image_meta']['orientation' ] = $image_meta[image_meta][orientation];
				}

				// find all image sizes
				$sizes = get_intermediate_image_sizes();
				
				
				// sizes
				if( !empty($sizes) ) {
					
					$a['sizes'] = array();
					
					foreach( $sizes as $size ) {
						
						// url
						$src = wp_get_attachment_image_src( $a['ID'], $size );
						
						// add src
						$a['sizes'][ $size ] = $src[0];
						$a['sizes'][ $size . '-width' ] = $src[1];
						$a['sizes'][ $size . '-height' ] = $src[2];
						
					}
					// foreach
					
				}
				// if
				
			} else {
				
				// is file
				$src = wp_get_attachment_url( $a['ID'] );
				
				$a['url'] = $src;
			}
			
			
			$value[ $k ] = 	$a;
		
		}
		// foreach
		
		
		// return
		return $value;
	}
	
	
	/*
	*  validate_value
	*
	*  description
	*
	*  @type	function
	*  @date	11/02/2014
	*  @since	5.0.0
	*
	*  @param	$post_id (int)
	*  @return	$post_id (int)
	*/
	
	function validate_value( $valid, $value, $field, $input ){
		
		if( empty($value) || !is_array($value) ) {
		
			$value = array();
			
		}
		
		
		if( count($value) < $field['min'] ) {
		
			$valid = _n( '%s requires at least %s selection', '%s requires at least %s selections', $field['min'], 'acf' );
			$valid = sprintf( $valid, $field['label'], $field['min'] );
			
		}
		
				
		return $valid;
		
	}

	
}

new acf_field_gallery();

endif;

?>