<?php
/**
 * WordPress Administration Media API.
 *
 * @package WordPress
 * @subpackage Administration
 */

/**
 * {@internal Missing Short Description}}
 *
 * This handles the file upload POST itself, creating the attachment post.
 *
 * @since unknown
 *
 * @param unknown_type $file_id
 * @param unknown_type $post_id
 * @param unknown_type $post_data
 * @return unknown
 */
function media_handle_upload($file_id, $post_id, $post_data = array()) {
	$overrides = array('test_form'=>false);

	$time = current_time('mysql');
	if ( $post = get_post($post_id) ) {
		if ( substr( $post->post_date, 0, 4 ) > 0 )
			$time = $post->post_date;
	}

	$file = wp_handle_upload($_FILES[$file_id], $overrides, $time);

	if ( isset($file['error']) )
		return new WP_Error( 'upload_error', $file['error'] );

	$url = $file['url'];
	$type = $file['type'];
	$file = $file['file'];
	$title = preg_replace('/\.[^.]+$/', '', basename($file));
	$content = '';

	// use image exif/iptc data for title and caption defaults if possible
	if ( $image_meta = @wp_read_image_metadata($file) ) {
		if ( trim($image_meta['title']) )
			$title = $image_meta['title'];
		if ( trim($image_meta['caption']) )
			$content = $image_meta['caption'];
	}

	// Construct the attachment array
	$attachment = array_merge( array(
		'post_mime_type' => $type,
		'guid' => $url,
		'post_parent' => $post_id,
		'post_title' => $title,
		'post_content' => $content,
	), $post_data );

	// Save the data
	$id = wp_insert_attachment($attachment, $file, $post_id);
	if ( !is_wp_error($id) ) {
		wp_update_attachment_metadata( $id, wp_generate_attachment_metadata( $id, $file ) );
	}

	return $id;

}

/**
 * {@internal Missing Short Description}}
 *
 * @since unknown
 *
 * @return unknown
 */
function media_upload_form_handler() {
	check_admin_referer('media-form');

	if ( !empty($_POST['attachments']) ) foreach ( $_POST['attachments'] as $attachment_id => $attachment ) {
		$post = $_post = get_post($attachment_id, ARRAY_A);
		if ( isset($attachment['post_content']) )
			$post['post_content'] = $attachment['post_content'];
		if ( isset($attachment['post_title']) )
			$post['post_title'] = $attachment['post_title'];
		if ( isset($attachment['post_excerpt']) )
			$post['post_excerpt'] = $attachment['post_excerpt'];
		if ( isset($attachment['menu_order']) )
			$post['menu_order'] = $attachment['menu_order'];
		if ( isset($attachment['post_parent']) )
			$post['post_parent'] = $attachment['post_parent'];

		$post = apply_filters('attachment_fields_to_save', $post, $attachment);

		if ( isset($post['errors']) ) {
			$errors[$attachment_id] = $post['errors'];
			unset($post['errors']);
		}

		if ( $post != $_post )
			wp_update_post($post);

		foreach ( get_attachment_taxonomies($post) as $t )
			if ( isset($attachment[$t]) )
				wp_set_object_terms($attachment_id, array_map('trim', preg_split('/,+/', $attachment[$t])), $t, false);
	}

	return $errors;
}

/**
 * {@internal Missing Short Description}}
 *
 * @since unknown
 *
 * @param unknown_type $form_fields
 * @param unknown_type $post
 * @return unknown
 */
function media_single_attachment_fields_to_edit( $form_fields, $post ) {
	unset($form_fields['url'], $form_fields['align'], $form_fields['image-size']);
	return $form_fields;
}

/**
 * {@internal Missing Short Description}}
 *
 * @since unknown
 *
 * @param unknown_type $post
 * @param unknown_type $attachment
 * @return unknown
 */
function image_attachment_fields_to_save($post, $attachment) {
	if ( substr($post['post_mime_type'], 0, 5) == 'image' ) {
		if ( strlen(trim($post['post_title'])) == 0 ) {
			$post['post_title'] = preg_replace('/\.\w+$/', '', basename($post['guid']));
			$post['errors']['post_title']['errors'][] = __('Empty Title filled from filename.');
		}
	}

	return $post;
}

add_filter('attachment_fields_to_save', 'image_attachment_fields_to_save', 10, 2);

/**
 * {@internal Missing Short Description}}
 *
 * @since unknown
 *
 * @param unknown_type $post
 * @param unknown_type $errors
 * @return unknown
 */
function get_attachment_fields_to_edit($post, $errors = null) {
	if ( is_int($post) )
		$post =& get_post($post);
	if ( is_array($post) )
		$post = (object) $post;

	$edit_post = sanitize_post($post, 'edit');

	$form_fields = array(
		'post_title'   => array(
			'label'      => __('Title'),
			'value'      => $edit_post->post_title,
		),
		'post_excerpt' => array(
			'label'      => __('Caption'),
			'value'      => $edit_post->post_excerpt,
		),
		'post_content' => array(
			'label'      => __('Description'),
			'value'      => $edit_post->post_content,
			'input'      => 'textarea',
		),
		'menu_order'   => array(
			'label'      => __('Order'),
			'value'      => $edit_post->menu_order
		),
	);

	foreach ( get_attachment_taxonomies($post) as $taxonomy ) {
		$t = (array) get_taxonomy($taxonomy);
		if ( empty($t['label']) )
			$t['label'] = $taxonomy;
		if ( empty($t['args']) )
			$t['args'] = array();

		$terms = get_object_term_cache($post->ID, $taxonomy);
		if ( empty($terms) )
			$terms = wp_get_object_terms($post->ID, $taxonomy, $t['args']);

		$values = array();

		foreach ( $terms as $term )
			$values[] = $term->name;
		$t['value'] = join(', ', $values);

		$form_fields[$taxonomy] = $t;
	}

	// Merge default fields with their errors, so any key passed with the error (e.g. 'error', 'helps', 'value') will replace the default
	// The recursive merge is easily traversed with array casting: foreach( (array) $things as $thing )
	$form_fields = array_merge_recursive($form_fields, (array) $errors);

	$form_fields = apply_filters('attachment_fields_to_edit', $form_fields, $post);

	return $form_fields;
}


/**
 * Retrieve HTML form for modifying the image attachment.
 *
 * @since unknown
 *
 * @param int $attachment_id Attachment ID for modification.
 * @param string|array $args Optional. Override defaults.
 * @return string HTML form for attachment.
 */
function get_media_item( $attachment_id, $args = null ) {
	global $redir_tab;

	$default_args = array( 'errors' => null, 'delete' => true, 'toggle' => true, 'show_title' => true );
	$args = wp_parse_args( $args, $default_args );
	extract( $args, EXTR_SKIP );

	global $post_mime_types;
	if ( ( $attachment_id = intval($attachment_id) ) && $thumb_url = get_attachment_icon_src( $attachment_id ) )
		$thumb_url = $thumb_url[0];
	else
		return false;

	$toggle_on = __('Show');
	$toggle_off = __('Hide');

	$post = get_post($attachment_id);

	$filename = basename($post->guid);
	$title = attribute_escape($post->post_title);

	if ( $_tags = get_the_tags($attachment_id) ) {
		foreach ( $_tags as $tag )
			$tags[] = $tag->name;
		$tags = attribute_escape(join(', ', $tags));
	}

	$type = '';
	if ( isset($post_mime_types) ) {
		$keys = array_keys(wp_match_mime_types(array_keys($post_mime_types), $post->post_mime_type));
		$type = array_shift($keys);
		$type = "<input type='hidden' id='type-of-$attachment_id' value='" . attribute_escape( $type ) . "' />";
	}

	$form_fields = get_attachment_fields_to_edit($post, $errors);

	if ( $toggle ) {
		$class = empty($errors) ? 'startclosed' : 'startopen';
		$toggle_links = "
	<a class='toggle describe-toggle-on' href='#'>$toggle_on</a>
	<a class='toggle describe-toggle-off' href='#'>$toggle_off</a>";
	} else {
		$class = 'form-table';
		$toggle_links = '';
	}

	$display_title = ( !empty( $title ) ) ? $title : $filename; // $title shouldn't ever be empty, but just in case
	$display_title = $show_title ? "<div class='filename new'>" . wp_html_excerpt($display_title, 60) . "</div>" : '';

	$gallery = ( (isset($_REQUEST['tab']) && 'gallery' == $_REQUEST['tab']) || (isset($redir_tab) && 'gallery' == $redir_tab) ) ? true : false;
	$order = '';

	foreach ( $form_fields as $key => $val ) {
		if ( 'menu_order' == $key ) {
			if ( $gallery )
				$order = '<div class="menu_order"> <input class="menu_order_input" type="text" id="attachments['.$attachment_id.'][menu_order]" name="attachments['.$attachment_id.'][menu_order]" value="'.$val['value'].'" /></div>';
			else
				$order = '<input type="hidden" name="attachments['.$attachment_id.'][menu_order]" value="'.$val['value'].'" />';

			unset($form_fields['menu_order']);
			break;
		}
	}

	$item = "
	$type
	$toggle_links
	$order
	$display_title
	<table class='slidetoggle describe $class'>
		<thead class='media-item-info'>
		<tr>
			<td class='A1B1' rowspan='4'><img class='thumbnail' src='$thumb_url' alt='' /></td>
			<td>$filename</td>
		</tr>
		<tr><td>$post->post_mime_type</td></tr>
		<tr><td>" . mysql2date($post->post_date, get_option('time_format')) . "</td></tr>
		<tr><td>" . apply_filters('media_meta', '', $post) . "</td></tr>
		</thead>
		<tbody>\n";

	$defaults = array(
		'input'      => 'text',
		'required'   => false,
		'value'      => '',
		'extra_rows' => array(),
	);

	$hidden_fields = array();

	foreach ( $form_fields as $id => $field ) {
		if ( $id{0} == '_' )
			continue;

		if ( !empty($field['tr']) ) {
			$item .= $field['tr'];
			continue;
		}

		$field = array_merge($defaults, $field);
		$name = "attachments[$attachment_id][$id]";

		if ( $field['input'] == 'hidden' ) {
			$hidden_fields[$name] = $field['value'];
			continue;
		}

		$required = $field['required'] ? '<abbr title="required" class="required">*</abbr>' : '';
		$aria_required = $field['required'] ? " aria-required='true' " : '';
		$class  = $id;
		$class .= $field['required'] ? ' form-required' : '';

		$item .= "\t\t<tr class='$class'>\n\t\t\t<th valign='top' scope='row' class='label'><label for='$name'><span class='alignleft'>{$field['label']}</span><span class='alignright'>$required</span><br class='clear' /></label></th>\n\t\t\t<td class='field'>";
		if ( !empty($field[$field['input']]) )
			$item .= $field[$field['input']];
		elseif ( $field['input'] == 'textarea' ) {
			$item .= "<textarea type='text' id='$name' name='$name'" . $aria_required . ">" . htmlspecialchars( $field['value'] ) . "</textarea>";
		} else {
			$item .= "<input type='text' id='$name' name='$name' value='" . attribute_escape( $field['value'] ) . "'" . $aria_required . "/>";
		}
		if ( !empty($field['helps']) )
			$item .= "<p class='help'>" . join( "</p>\n<p class='help'>", array_unique((array) $field['helps']) ) . '</p>';
		$item .= "</td>\n\t\t</tr>\n";

		$extra_rows = array();

		if ( !empty($field['errors']) )
			foreach ( array_unique((array) $field['errors']) as $error )
				$extra_rows['error'][] = $error;

		if ( !empty($field['extra_rows']) )
			foreach ( $field['extra_rows'] as $class => $rows )
				foreach ( (array) $rows as $html )
					$extra_rows[$class][] = $html;

		foreach ( $extra_rows as $class => $rows )
			foreach ( $rows as $html )
				$item .= "\t\t<tr><td></td><td class='$class'>$html</td></tr>\n";
	}

	if ( !empty($form_fields['_final']) )
		$item .= "\t\t<tr class='final'><td colspan='2'>{$form_fields['_final']}</td></tr>\n";
	$item .= "\t</tbody>\n";
	$item .= "\t</table>\n";

	foreach ( $hidden_fields as $name => $value )
		$item .= "\t<input type='hidden' name='$name' id='$name' value='" . attribute_escape( $value ) . "' />\n";

	if ( $post->post_parent < 1 && (int) $_REQUEST['post_id'] ) {
		$parent = (int) $_REQUEST['post_id'];
		$parent_name = "attachments[$attachment_id][post_parent]";

		$item .= "\t<input type='hidden' name='$parent_name' id='$parent_name' value='" . $parent . "' />\n";
	}

	return $item;
}

/**
 * {@internal Missing Short Description}}
 *
 * @since unknown
 */
function media_upload_header() {
	?>
	<div id="media-upload-header">
	<?php the_media_upload_tabs(); ?>
	</div>
	<?php
}

/**
 * {@internal Missing Short Description}}
 *
 * @since unknown
 *
 * @param unknown_type $errors
 */
function media_upload_form( $errors = null ) {
	global $type, $tab;

	$flash_action_url = admin_url('async-upload.php');

	// If Mac and mod_security, no Flash. :(
	$flash = true;
	if ( false !== strpos(strtolower($_SERVER['HTTP_USER_AGENT']), 'mac') && apache_mod_loaded('mod_security') )
		$flash = false;

	$flash = apply_filters('flash_uploader', $flash);
	$post_id = isset($_REQUEST['post_id']) ? intval($_REQUEST['post_id']) : 0;

?>
<div id="media-upload-notice">
<?php if (isset($errors['upload_notice']) ) { ?>
	<?php echo $errors['upload_notice']; ?>
<?php } ?>
</div>
<div id="media-upload-error">
<?php if (isset($errors['upload_error']) && is_wp_error($errors['upload_error'])) { ?>
	<?php echo $errors['upload_error']->get_error_message(); ?>
<?php } ?>
</div>

<?php do_action('pre-upload-ui'); ?>

<div id="html-upload-ui">
<?php do_action('pre-html-upload-ui'); ?>
	<p id="async-upload-wrap">
	<input type="file" name="async-upload" id="async-upload" /> <input type="submit" class="button" name="html-upload" value="<?php echo attribute_escape(__('Upload')); ?>" /> <a href="upload.php"><?php _e('Cancel'); ?></a>
	</p>

	<br class="clear" />
	<?php if ( is_lighttpd_before_150() ): ?>
	<p><?php _e('If you want to use all capabilities of the uploader, like uploading multiple files at once, please upgrade to lighttpd 1.5.'); ?></p>
	<?php endif;?>
<?php do_action('post-html-upload-ui'); ?>
</div>
<?php do_action('post-upload-ui'); ?>
<?php
}

?>