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<?php
/********* Post Image Functions ********/

// Container function
function post_image($width = 460, $height = 170) {
	global $post;
	echo find_image($post->ID, $width, $height);
}

// Check custom field, otherwise use first image
function find_image($id, $width, $height) {
	if (custom_image($id)) {
		if (custom_image($id) != 'none') {
			return timthumb(custom_image($id), $width, $height);
		}
	}
	elseif (first_image($id)) {
		if (!is_single()) {
			return timthumb(first_image($id), $width, $height);
		}
	}
	else {
		return false;
	}
}

// Image from custom field
function custom_image($id) {
	return get_post_meta($id, 'image', true);
}

// First image attached to post
function first_image($id) {
	global $wpdb;
	$first_image = $wpdb->get_results("SELECT guid FROM $wpdb->posts WHERE post_parent = '$id' AND post_type = 'attachment' ORDER BY `post_date` ASC LIMIT 0,1");
	if ($first_image) {
		return $first_image[0]->guid;
	}
}

// Build & resize image
function timthumb($image, $width, $height) {
	$image_parsed = parse_url($image);
	$url_parsed = parse_url(get_permalink());
	// TimThumb can only process images on the same domain as it is
	// If the image IS at the same domain
	// AND it hasn't been disabled in the admin panel, then process it
	// Otherwise, resize with raw HTML
	if (get_option('viva_timthumb') != 'on' && $image_parsed['host'] == $url_parsed['host']) {
		$path = get_bloginfo('template_directory') . '/viva/post-preview/timthumb.php?src=' . $image . '&amp;w=' . $width . '&amp;h=' . $height . '&amp;zc=1';
	}
	else {
		// Remote image or TimThumb is disabled in Admin Panel
		$path = $image;
	}
	return '<img src="' . $path . '" alt="Post Image" width="' . $width . '" height="' . $height . '" />';
}