/**
 * Extra Examples for NetTuts article:
 * Creating Custom Fields for Attachments in WordPress
 * http://net.tutsplus.com/tutorials/wordpress/creating-custom-fields-for-attachments-in-wordpress/
 */


/**
 * Start: select box example
 */

function attachment_selectbox_edit($form_fields, $post) {
	
	// select options: you could code these manually or get it from a database
	$select_options = array(
		"there" => "There (over there)",
		"their" => "Their (their stuff)",
		"they're" => "They're (they are)",
	);

	// get the current value of our custom field
	$current_value = get_post_meta($post->ID, "_mySelectBox", true);
	
	// build the html for our select box
	$mySelectBoxHtml = "<select name='attachments[{$post->ID}][mySelectBox]' id='attachments[{$post->ID}][mySelectBox]'>";
	foreach($select_options as $value => $text){
	
		// if this value is the current_value we'll mark it selected
		$selected = ($current_value == $value) ? ' selected ' : '';
		
		// escape value	for single quotes so they won't break the html
		$value = addcslashes( $value, "'");
		
		$mySelectBoxHtml .= "<option value='{$value}' {$selected}>{$text}</option>";
	}
	$mySelectBoxHtml .= "</select>";
	
	// add our custom select box to the form_fields
	$form_fields["mySelectBox"]["label"] = __("Grammar nazi says what?");
	$form_fields["mySelectBox"]["input"] = "html";
	$form_fields["mySelectBox"]["html"] = $mySelectBoxHtml;

	return $form_fields;
}
add_filter("attachment_fields_to_edit", "attachment_selectbox_edit", null, 2);


function attachment_selectbox_save($post, $attachment) {
	if( isset($attachment['mySelectBox']) ){
		update_post_meta($post['ID'], '_mySelectBox', $attachment['mySelectBox']);
	}
	return $post;
}
add_filter("attachment_fields_to_save", "attachment_selectbox_save", null, 2);

/**
 * End: select box example
 */

// ---------------------------------------------------------------------------

/**
 * Start: checkbox example
 */

function attachment_checkbox_edit($form_fields, $post) {
	
	// get the current value of our custom field
	$current_value = get_post_meta($post->ID, "_myCheckBox", true);
	
	// if this value is the current_value we'll mark it checked
	$checked = ($current_value == "accepted_terms") ? ' checked ' : '';
	
	// update 2010-08-05 @ 5:10pm CDT: hidden field takes over if the checkbox is unchecked, in essence deleting the value
	$myCheckBoxHtml = "
		<input type='hidden' name='attachments[{$post->ID}][myCheckBox]' value='' />
		<input type='checkbox' name='attachments[{$post->ID}][myCheckBox]' id='attachments[{$post->ID}][myCheckBox]' value='accepted_terms' {$checked} />
	";
	
	$form_fields["myCheckBox"]["label"] = __("Accept the Terms Yo!");
	$form_fields["myCheckBox"]["input"] = "html";
	$form_fields["myCheckBox"]["html"] = $myCheckBoxHtml;

	return $form_fields;
}
add_filter("attachment_fields_to_edit", "attachment_checkbox_edit", null, 2);


function attachment_checkbox_save($post, $attachment) {
	if( isset($attachment['myCheckBox']) ){
		update_post_meta($post['ID'], '_myCheckBox', $attachment['myCheckBox']);
	}
	return $post;
}
add_filter("attachment_fields_to_save", "attachment_checkbox_save", null, 2);

/**
 * End: checkbox example
 */