*/
function usp_is_public_submission($postId = false) {
global $post;
if (false === $postId) {
if ($post) $postId = $post->ID;
}
if (get_post_meta($postId, 'is_submission', true) == true) {
return true;
}
return false;
}
/*
Returns an array of URLs for the specified post image
Usage:
*/
function usp_get_post_images($postId = false) {
global $post;
if (false === $postId) {
if ($post) $postId = $post->ID;
}
if (usp_is_public_submission($postId)) {
return get_post_meta($postId, 'user_submit_image');
}
return array();
}
/*
Prints the URLs for all post attachments.
Usage:
Syntax:
Parameters:
$size = image size as thumbnail, medium, large or full -> default = full
$beforeUrl = text/markup displayed before the image URL -> default = 
$numberImages = the number of images to display for each post -> default = false (display all)
$postId = an optional post ID to use -> default = uses global post
*/
function usp_post_attachments($size = 'full', $beforeUrl = '
', $numberImages = false, $postId = false) {
global $post;
if (false === $postId) {
if ($post) $postId = $post->ID;
}
if (false === $numberImages || !is_numeric($numberImages)) {
$numberImages = 99;
}
$args = array(
'post_type' => 'attachment',
'post_parent' => $postId,
'post_status' => 'inherit',
'numberposts' => $numberImages
);
$attachments = get_posts($args);
foreach ($attachments as $attachment) {
$info = wp_get_attachment_image_src($attachment->ID, $size);
echo $beforeUrl . $info[0] . $afterUrl;
}
}
/*
For public-submitted posts, this tag displays the author's name as a link (if URL provided) or plain text (if URL not provided)
For normal posts, this tag displays the author's name as a link to their author's post page
Usage:
*/
function usp_author_link() {
global $post;
$isSubmission = get_post_meta($post->ID, 'is_submission', true);
$submissionAuthor = get_post_meta($post->ID, 'user_submit_name', true);
$submissionLink = get_post_meta($post->ID, 'user_submit_url', true);
if ($isSubmission && !empty($submissionAuthor)) {
if (empty($submissionLink)) {
echo '' . $submissionAuthor . '';
} else {
echo '' . $submissionAuthor . '';
}
} else {
the_author_posts_link();
}
}
/*
Function: usp_get_images()
Returns an array of image URLs, wrapped in optional HTML
Syntax:
Usage:
Parameters:
$size = image size as thumbnail, medium, large or full -> default = thumbnail
$before = text/markup displayed before the image URL -> default = {img src="
$after = text/markup displayed after the image URL -> default = " /}
$number = the number of images to display for each post -> default = false (display all)
$postId = an optional post ID to use -> default = false (uses global/current post)
Notes:
For $before/$after parameters, use curly brackets instead of angle brackets, for example:
usp_get_images('thumbnail', '{img src="', '" /}'); // results in each image URL wrapped like: 
For $before/$after parameters, use %%url%% to get the URL of the full-size image, for example:
usp_get_images('thumbnail', '{a href="%%url%%"}{img src="', '" /}{/a}'); // outputs for each image:
*/
if (!function_exists('usp_get_images')) :
function usp_get_images($size = false, $before = false, $after = false, $number = false, $postId = false) {
global $post;
if (false === $postId || !is_numeric($postId)) $postId = $post->ID;
if (false === $number || !is_numeric($number)) $number = apply_filters('usp_image_attachments', 100);
if (false === $size) $size = 'thumbnail';
if (false === $before) $before = '{img src="';
if (false === $after) $after = '" /}';
$args = compact('before', 'after');
$new = array();
foreach ($args as $key => $value) {
$value = str_replace("{", "<", $value);
$value = str_replace("}", ">", $value);
if (isset($value)) $new[$key] = $value;
}
$args = array(
'post_status' => 'publish',
'post_type' => 'attachment',
'post_parent' => $postId,
'post_status' => 'inherit',
'posts_per_page' => $number,
'fields' => 'ids'
);
$args = apply_filters('usp_image_attachments_args', $args);
$image_ids = get_posts($args);
$urls = array(); $i = 1;
foreach ($image_ids as $id) {
$url = wp_get_attachment_image_src($id, $size);
$original = wp_get_attachment_image_src($id, 'full');
if ($url !== false && $original !== false) {
$before = isset($new['before']) ? $new['before'] : '';
$after = isset($new['after']) ? $new['after'] : '';
$before = str_replace("%%url%%", $original[0], $before);
$after = str_replace("%%url%%", $original[0], $after);
$urls[] = isset($url[0]) ? $before . $url[0] . $after : '';
if ($i == intval($number)) break;
$i++;
}
}
return $urls;
}
endif;